142 results on '"Antivirais"'
Search Results
2. Inibição seletiva das atividades das enzimas transcriptase reversa do vírus HIV-1 e DNA polimerases humanas por derivados Dipirazolo-Piridina
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H.S Pereira, M.V Caetano, I.C.P.P Frugulhetti, A.M.R Bernardino, C. Nogueira, C.R Gomes, G.A Romeiro, A. Chaves, V.F Ferreira, M.C.B Souza, and N. Moussatché
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ribonucleosídeos ,antivirais ,transcriptase reversa ,Medicine - Abstract
Novos ribonucleosídeos derivados dos sistemas dipirazolo- piridina foram preparados e avaliados quanto à atividade polimerásica das enzimas transcriptase reversa (RT) do vírus HIV-1 e das DNA polimerases humanas alfa e epsilon. Os derivados 1b e 1d inibiram a atividade da transcriptase reversa em concentrações de micromolares. Entretanto, as mesmas substâncias não foram capazes de inibir a atividade polimerase das enzimas DNA-polimerase humana alfa e epsilon.
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- 2021
3. PROPRIEDADES BIOLÓGICAS E POTÊNCIAL TERAPÊUTICO DA PRÓPOLIS: UMA REVISÃO INTEGRATIVA DA LITERATURA.
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SILVEIRA, AMANDA DA COSTA, DE SOUSA, GABRIELLE NUNES, DA LUZ, MAÍRA FONTEL, DA COSTA, MILENA MARQUES, BEZERRA, NILSON VELOSO, and ANDRIOLO, REGIS BRUNI
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Propolis is a natural product widely used due to its biological properties. The aim of this study was to evaluate and update the main biological properties of propolis and therapeutic potential in humans. Through an integrative literature review, the database was searched: BVS, MEDLINE, LILACS and SCIELO. A total of 3,179 documents of the determined properties were found, after applying the criteria and critical reading, 110 scientific articles were selected from 2010 to 2020, including in vitro, in vivo studies, clinical trials and literature reviews. The results of different types of propolis demonstrated efficacy, in the anti-inflammatory, antioxidant, antineoplastic, antifungal, antibacterial and antiviral effects. It is suggested that some types of propolis may be therapeutic potentials, especially in the face of infections caused by microorganisms. Literature review studies that evaluate antiviral properties and that showed suggestive use of propolis as a promising source of hope in the face of COVID-19 stood out. According to the analyzes, it is possible to observe and conclude significant results regarding the favorable biological properties of different types of propolis, however it was considered that it is not possible to generalize for all types, in addition to that, more in vivo studies should be performed to attribute more precisely and safely the therapeutic potential of this compound. [ABSTRACT FROM AUTHOR]
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- 2021
4. Risco de Recorrência do Carcinoma Hepatocelular após o Uso de Antivirais de Ação Direta no Tratamento de Hepatite C: Revisão Sistemática e Metanálise
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Jefferson Wrublack Cuba, Amanda da Silva Anjos, Edimar Leandro Toderke, and Filipe Vieira Kwiatkowski
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Carcinoma Hepatocelular/etiologia ,Recidiva ,Antivirais ,Hepatite C/complicações ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Introdução: A hepatite C está associada ao desenvolvimento do carcinoma hepatocelular (CHC). O regime terapêutico baseado em interferon vem sendo substituído pelos antivirais de ação direta (AAD) para tratamento da infecção pelo vírus da hepatite C (HCV). Contudo, estudos recentes evidenciaram um aumento inesperado da recorrência do CHC em pacientes tratados com AAD para resolução da hepatite C. Objetivo: Avaliar o risco de recorrência de hepatocarcinoma após uso de AAD em pacientes com infecção por HCV. Método: Realizou-se um levantamento nas bases de dados PubMed, MEDLINE e LILACS de acordo com os descritores DeCS/MeSH ((hepatocellular carcinoma) AND recurrence) AND Direct-acting antiviral. A revisão obedeceu ao protocolo PRISMA e está cadastrada na plataforma PROSPERO. A análise estatística dos dados foi realizada no software RStudio. Resultados: Sete artigos foram selecionados resultando em 847 pacientes. Entre os tratados com AAD, a taxa de recorrência variou entre 11,1% e 42,1% e, no grupo controle, ocorreu em 5% a 65,6% dos pacientes. O risco relativo (RR) de recorrência do CHC no grupo de pacientes que recebeu AAD foi menor do que o risco evidenciado no grupo controle, apesar de não haver significância estatística (RR 0,71 95% IC [0,55;0,93] I2=38%, p=0,14). O tempo até o diagnóstico da recorrência teve uma média de 9,35 meses no grupo exposto a terapia e 13,42 meses no grupo controle. Conclusão: Sugere-se que a terapia com AAD não aumenta o risco de recorrência do CHC em comparação com grupos controle. Nos pacientes que desenvolveram recorrência, ocorreu com maior frequência dentro do primeiro ano após introdução dos AAD.
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- 2021
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5. Hepatite C: avaliar a correlação da resposta virológica na 4ª semana de tratamento com a resposta virológica sustentada em um hospital terciário no Ceará
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Cibele Silveira Pinho, Lúcia Libanez Bessa Campelo Braga, José Milton de Castro Lima, Elodie Bomfim Hyppolito, Flávia Siqueira Furtado Mello, Flavio Esmeraldo Rolim, and Rodrigo Vieira Costa Lima
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Hepatite C ,Antivirais ,Viremia ,Medicine ,Medicine (General) ,R5-920 - Abstract
Introdução: a hepatite C acomete aproximadamente 1% da população brasileira, cronificando em até 80% dos casos. As novas drogas de ação antivirais diretas (DAAs) aumentaram significativamente a resposta virológica sustentada (RVS), ficando em torno de 90%, além de reduzirem os efeitos colaterais e a duração da terapia medicamentosa. Em alguns casos, a carga viral já se encontra negativada em torno da quarta semana de tratamento. Objetivo: avaliar a correlação entre a carga viral da 4ª semana e a da resposta virológica sustentada (RVS). Método: estudo retrospectivo com uma série de 462 pacientes portadores de hepatite C crônica submetidos ao tratamento com as novas drogas antivirais diretas (DAAs) em dois hospitais terciários da rede pública de saúde do estado do Ceará. Resultado: dos 462 pacientes analisados, 193 foram selecionados para o estudo. 148 pacientes avaliados (76,6%) apresentaram carga viral indetectável (
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- 2018
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6. Manifestações Clínicas Atípicas de Infeção Genital pelos Vírus Herpes Simplex e sua Abordagem Terapêutica
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Pedro Miguel Garrido and João Borges-Costa
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Antivirais ,Doenças Virais Sexualmente Transmissíveis ,Herpes Genital ,Herpes Simples ,Infecções Oportunistas Relacionadas com a SIDA ,Dermatology ,RL1-803 ,Infectious and parasitic diseases ,RC109-216 - Abstract
O herpes genital é uma doença sexualmente transmissível com elevada prevalência. As apresentações clínicas atípicas da infeção herpética são raras, mas a sua prevalência aumentou, em relação com o crescente número de indivíduos imunossuprimidos. A terapêutica destas condições é difícil, requerendo maior tempo de tratamento e estando associada a uma importante taxa de resistência aos fármacos anti-virais comumente utilizados. Como alternativas eficazes, salientam-se os anti-virais foscarnet e cidofovir. Neste artigo são abordadas três formas de apresentação cutânea atípica de infeção herpética, selecionadas pela sua relevância na prática clínica: lesões hipertróficas, úlceras crónicas e foliculite herpética.
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- 2018
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7. PEGYLATED INTERFERON AND RIBAVIRIN FOR TREATMENT OF RECURRENT HEPATITIS C AFTER LIVER TRANSPLANTATION: a single-liver transplant center experience in Brazil
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José Huygens Parente GARCIA, Antônio Haroldo de ARAÚJO FILHO, Lucia Libanez Bessa Campelo BRAGA, Cyntia Ferreira Gomes VIANA, Tarciso Daniel Santos ROCHA, and Karla Brandão PEREIRA
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Hepatite C crônica ,Antivirais ,Transplante de fígado ,Resposta virológica sustentada ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
BackgroundTreatment of hepatitis C virus infection in post-transplantation patients is a challenge due to poor tolerance and low success rates.ObjectiveTo determine the response rate to pegylated interferon and ribavirin in post-liver transplant patients with hepatitis C recurrence.MethodsBetween 18 May 2002 and 18 December 2011, 601 patients underwent liver transplantation at our service (Hospital Universitário Walter Cantídio, University of Ceará), 176 (29.2%) of whom were hepatitis C virus positive. Forty received antiviral therapy and were included in this cohort study. Twenty-eight (70%) completed the treatment protocol, which consisted of pegylated interferon and ribavirin for 48 weeks.ResultsThe sustained virological response rate was 55% according to intention-to-treat analysis. Recipient age and exposure to antiviral drugs prior to liver transplantation were associated with sustained virological response in the multivariate analysis. Patients were followed for 57 months on the average. Survival at 1 and 5 years was 100% in responders, versus 100% and 78%, respectively, in non-responders.ConclusionSustained virological response rates were satisfactory in our series of liver transplantation patients, and decreased with increasing recipient age. Non-exposure to antiviral drugs prior to liver transplantation was positively associated with sustained virological response. The overall survival of responders and non-responders was similar.
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- 2015
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8. Monkeypox: generalities, transmission method and therapeutic approaches
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Ana Carolina Bastos do Rêgo, Letícia Almeida Guedes de Lima, Marvin Gonçalves Duarte, Lucas de Jesus Santana do Amaral, Zélia Maria Sarmento de Andrade Lima Fischer de Lyra, Diogo Acioli Filizola Germano, Fernanda de Oliveira Dantas, Geovanna Esther Pereira Santiago, Guilherme Marinho Sampaio, and Luciano Barreto Silva
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Vacunas ,Vaccines ,Varíola dos macacos ,Vacinas ,Antivirais ,Viruela del mono ,Antivirales ,General Earth and Planetary Sciences ,Monkeypox ,Antivirals ,General Environmental Science - Abstract
Clinical and epidemiological studies suggest that human-to-human transmission of monkeypox may occur through direct or indirect contact, through secretions through the respiratory tract or through skin lesions, and through contaminated objects. Therefore, this literature review exposes generalities, forms of transmission and therapeutic approaches related to Monkeypox. A survey was carried out on government websites, scientific articles and journalistic websites about ways of prevention and vaccines against the monkeypox virus. It is known that this zoonosis belongs to the Poxviridae family and spreads with greater intensity in underdeveloped countries, due to the unsanitary conditions of these places. Studies indicate that vaccines produced for smallpox are efficient against Monkeypox virus, especially the third generation ones. The vaccine that obtained a better result in the research was the MVA-BN, since it does not leave lesions in the place where it was applied and does not present a threat to a possible transmission, it was also developed for immunosuppressed individuals, facilitating the mass vaccination of the vaccine. population. Some drugs have also been shown to be effective against Monkeypox, namely: Brincidofovir, Cidofovir and Tecovirimat, with Tecovirimat in evidence for its efficiency and moderate side effects. Los estudios clínicos y epidemiológicos sugieren que la transmisión de la viruela del mono de persona a persona puede ocurrir a través del contacto directo o indirecto, a través de secreciones a través del tracto respiratorio oa través de lesiones en la piel, y a través de objetos contaminados. En vista de ello, esta revisión bibliográfica expone generalidades, formas de transmisión y enfoques terapéuticos relacionados con la viruela del mono. Se realizó una encuesta en sitios web gubernamentales, artículos científicos y sitios web periodísticos sobre formas de prevención y vacunas contra el virus de la viruela del mono. Se sabe que esta zoonosis pertenece a la familia Poxviridae y se propaga con mayor intensidad en países subdesarrollados, debido a las condiciones insalubres de estos lugares. Los estudios muestran que las vacunas producidas contra la viruela son eficaces contra el virus de la viruela del mono, especialmente las vacunas de tercera generación. La vacuna que obtuvo un mejor resultado en la investigación fue la MVA-BN, ya que no deja lesiones en el lugar de aplicación y no presenta amenaza para una posible transmisión, además fue desarrollada para personas inmunodeprimidas, facilitando la vacunación masiva de la población vacuna. También se ha demostrado que algunos medicamentos son efectivos contra la viruela del mono, a saber: Brincidofovir, Cidofovir y Tecovirimat, con Tecovirimat en evidencia por su eficiencia y efectos secundarios moderados. Estudos clínicos e epidemiológicos sugerem que a transmissão do Varíola dos macacos entre humanos pode ocorrer através do contato direto ou indireto, através de secreções pelas vias respiratórias ou por lesões na pele, e por objetos contaminados. Em vista disso, esta revisão de literatura expõe generalidades, formas de transmissão e abordagens terapêuticas relacionadas à Monkeypox. Foi realizada uma pesquisa nos ‘websites’ governamentais, artigos científicos e ‘websites’ jornalísticos acerca das formas de prevenção e vacinas contra o vírus da Varíola dos macacos. Sabe-se que essa zoonose pertence à família Poxviridae e se propaga com maior intensidade nos países subdesenvolvidos, devido a insalubridade desses locais. Estudos apontam que as vacinas produzidas para a Varíola humana apresentam eficiência contra o Monkeypox vírus, principalmente as de terceira geração. A vacina que obteve um melhor resultado nas pesquisas foi a MVA-BN, uma vez que não deixa lesões no local na qual foi aplicada e não apresenta ameaça para uma possível transmissão, ela também foi elaborada para indivíduos imunossuprimidos, facilitando a vacinação em massa da população. Alguns medicamentos também se mostraram eficazes contra a Varíola dos macacos, sendo eles: Brincidofovir, Cidofovir e Tecovirimat, tendo o Tecovirimat em evidência pela sua eficiência e efeitos colaterais moderados.
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- 2022
9. Neuraminidase inhibitors rewire neutrophil function in vivo in murine sepsis and ex vivo in COVID-19
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Rodrigo de Oliveira Formiga, Flávia C. Amaral, Camila F. Souza, Daniel A. G. B. Mendes, Carlos W. S. Wanderley, Cristina B. Lorenzini, Adara A. Santos, Juliana Antônia, Lucas F. Faria, Caio C. Natale, Nicholas M. Paula, Priscila C. S. Silva, Fernanda R. Fonseca, Luan Aires, Nicoli Heck, Márick R. Starick, Celso M. Queiroz-Junior, Felipe R. S. Santos, Filipe R. O. de Souza, Vivian V. Costa, Shana P. C. Barroso, Alexandre Morrot, Johan Van Weyenbergh, Regina Sordi, Frederico Alisson-Silva, Fernando Q. Cunha, Edroaldo L. Rocha, Sylvie Chollet-Martin, Maria Margarita Hurtado-Nedelec, Clémence Martin, Pierre-Régis Burgel, Daniel S. Mansur, Rosemeri Maurici, Matthew S. Macauley, André Báfica, Véronique Witko-Sarsat, and Fernando Spiller
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Oseltamivir ,biology ,business.industry ,ANTIVIRAIS ,medicine.disease ,Article ,Sepsis ,NEU1 ,chemistry.chemical_compound ,Zanamivir ,chemistry ,In vivo ,Immunology ,medicine ,Viral neuraminidase ,biology.protein ,business ,Neuraminidase ,Ex vivo ,medicine.drug - Abstract
Neutrophil overstimulation plays a crucial role in tissue damage during severe infections. Neuraminidase (NEU)-mediated cleavage of surface sialic acid has been demonstrated to regulate leukocyte responses. Here, we report that antiviral NEU inhibitors constrain host NEU activity, surface sialic acid release, ROS production, and NETs released by microbial-activated human neutrophils.In vivo, treatment with Oseltamivir results in infection control and host survival in peritonitis and pneumonia models of sepsis. Single-cell RNA sequencing re-analysis of publicly data sets of respiratory tract samples from critical COVID-19 patients revealed an overexpression of NEU1 in infiltrated neutrophils. Moreover, Oseltamivir or Zanamivir treatment of whole blood cells from severe COVID-19 patients reduces host NEU-mediated shedding of cell surface sialic acid and neutrophil overactivation. These findings suggest that neuraminidase inhibitors can serve as host-directed interventions to dampen neutrophil dysfunction in severe infections.At a GlanceIn a severe systemic inflammatory response, such as sepsis and COVID-19, neutrophils play a central role in organ damage. Thus, finding new ways to inhibit the exacerbated response of these cells is greatly needed. Here, we demonstrate thatin vitrotreatment of whole blood with the viral neuraminidase inhibitors Oseltamivir or Zanamivir, inhibits the activity of human neuraminidases as well as the exacerbated response of neutrophils. In experimental models of severe sepsis, oseltamivir decreased neutrophil activation and increased the survival rate of mice. Moreover, Oseltamivir or Zanamivirex vivotreatment of whole blood cells from severe COVID-19 patients rewire neutrophil function.
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- 2022
10. Implications of SARS-Cov-2 infection on eNOS and iNOS activity: Consequences for the respiratory and vascular systems
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Claudiana Lameu, Caio V.T. Rossini, and Lara Mendes Ferreira Guimarães
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0301 basic medicine ,Cancer Research ,Nitric Oxide Synthase Type III ,Endothelium ,Physiology ,Respiratory System ,Clinical Biochemistry ,ANTIVIRAIS ,Nitric Oxide Synthase Type II ,Endogeny ,Inflammation ,Review ,030204 cardiovascular system & hematology ,Nitric Oxide ,antiviral effect ,Biochemistry ,Asymptomatic ,Gene Expression Regulation, Enzymologic ,coagulopathy ,Nitric oxide ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Enos ,Coagulopathy ,medicine ,Humans ,Respiratory system ,biology ,SARS-CoV-2 ,business.industry ,COVID-19 ,coronavirus disease-19 ,acute respiratory distress syndrome ,medicine.disease ,biology.organism_classification ,030104 developmental biology ,medicine.anatomical_structure ,chemistry ,Immunology ,Blood Vessels ,nitric oxide metabolism ,medicine.symptom ,business - Abstract
Symptoms of COVID-19 range from asymptomatic/mild symptoms to severe illness and death, consequence of an excessive inflammatory process triggered by SARS-CoV-2 infection. The diffuse inflammation leads to endothelium dysfunction in pulmonary blood vessels, uncoupling eNOS activity, lowering NO production, causing pulmonary physiological alterations and coagulopathy. On the other hand, iNOS activity is increased, which may be advantageous for host defense, once NO plays antiviral effects. However, overproduction of NO may be deleterious, generating a pro-inflammatory effect. In this review, we discussed the role of endogenous NO as a protective or deleterious agent of the respiratory and vascular systems, the most affected in COVID-19 patients, focusing on eNOS and iNOS roles. We also reviewed the currently available NO therapies and pointed out possible alternative treatments targeting NO metabolism, which could help mitigate health crises in the present and future CoV’s spillovers., Graphical abstract Image 1
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- 2021
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11. Modulating Fingolimod (FTY720) Anti-SARS-CoV-2 Activity Using a PLGA-Based Drug Delivery System
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Renata Rank Miranda, Natália Noronha Ferreira, Edmarcia Elisa de Souza, Paula Maria Pincela Lins, Leonardo Miziara Barboza Ferreira, Arne Krüger, Valéria Maria de Oliveira Cardoso, Edison Luiz Durigon, Carsten Wrenger, and Valtencir Zucolotto
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Biomaterials ,Drug Delivery Systems ,Fingolimod Hydrochloride ,SARS-CoV-2 ,Biochemistry (medical) ,ANTIVIRAIS ,Biomedical Engineering ,Humans ,General Chemistry ,COVID-19 Drug Treatment - Abstract
COVID-19 has resulted in more than 490 million people being infected worldwide, with over 6 million deaths by April 05th, 2022. Even though the development of safe vaccine options is an important step to reduce viral transmission and disease progression, COVID-19 cases will continue to occur, and for those cases, efficient treatment remains to be developed. Here, a drug repurposing strategy using nanotechnology is explored to develop a therapy for COVID-19 treatment. Nanoparticles (NPs) based on PLGA for fingolimod (FTY720) encapsulation show a size of ∼150 nm and high drug entrapment (∼90%). The NP (NP@FTY720) can control FTY720 release in a pH-dependent manner. Cytotoxicity assays using different cell lines show that NP@FTY720 displays less toxicity than the free drug. Flow cytometry and confocal microscopy reveal that NPs are actively internalized mostly through caveolin-mediated endocytosis and macropinocytosis pathways and co-localized with lysosomes. Finally, NP@FTY720 not only exhibits anti-SARS-CoV-2 activity at non-cytotoxic concentrations, but its biological potential for viral infection inhibition is nearly 70 times higher than that of free drug treatment. Based on these findings, the combination of drug repurposing and nanotechnology as NP@FTY720 is presented for the first time and represents a promising frontline in the fight against COVID-19.
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- 2022
12. Manifestações Clínicas Atípicas de Infeção Genital pelos Vírus Herpes Simplex e sua Abordagem Terapêutica.
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Miguel Garrido, Pedro and Borges-Costa, João
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Genital herpes is a sexually transmitted infection with high global prevalence. Atypical clinical presentations of herpetic infection are rare but are becoming increasingly frequent due to the growing number of immunosuppressed patients. Therapy is challenging, with a longer treatment duration being frequently needed and an important resistance rate to the common anti-viral agents. Foscarnet and cidofovir are effective alternatives. In this article we review three atypical cutaneous presentations of herpetic infection, selected by their relevance in clinical practice: hypertrophic lesions, chronic ulcers and herpetic folliculitis. [ABSTRACT FROM AUTHOR]
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- 2018
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13. The effects of favipiravir on hematological parameters of covıd-19 patients
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Selcuk Yaylaci, Mehmet Koroglu, Didar Şenocak, Havva Kocayigit, Ahmed Bilal Genc, Hamad Dheir, Oguz Karabay, Deniz Çekiç, Ceyhun Varim, and Abdülkadir Aydin
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Male ,Medicine (General) ,Sangue ,Células sanguíneas ,Hematocrit ,Gastroenterology ,Antivirais ,Hemoglobins ,Leukocyte Count ,0302 clinical medicine ,Platelet ,030212 general & internal medicine ,Aged, 80 and over ,0303 health sciences ,medicine.diagnostic_test ,General Medicine ,Middle Aged ,Blood ,Pyrazines ,Female ,Coronavirus Infections ,Adult ,medicine.medical_specialty ,Coronavirus disease 2019 (COVID-19) ,Pneumonia, Viral ,Favipiravir ,Antiviral Agents ,Infecções por coronavírus ,03 medical and health sciences ,Betacoronavirus ,R5-920 ,Internal medicine ,Diabetes mellitus ,medicine ,Humans ,In patient ,Adverse effect ,Pandemics ,030304 developmental biology ,Aged ,Retrospective Studies ,Blood Cells ,business.industry ,Platelet Count ,SARS-CoV-2 ,COVID-19 ,medicine.disease ,Amides ,CD4 Lymphocyte Count ,Hemoglobin ,business - Abstract
SUMMARY INTRODUCTION This study aims to evaluate changes in hematological parameters after the follow-up of patients who received treatment with favipiravir due to COVID-19 infections. METHODS Sixty-two cases receiving favipiravir treatment for at least five days due to COVID-19 infection were evaluated retrospectively. Parameters including age, gender, nasopharyngeal swab positivity, and chronic diseases were analyzed. Hematologic parameters were analyzed before and after the treatment. RESULTS The mean age of the patients receiving treatment with favipiravir was 63.7±12.3 years. Nasopharyngeal swab positivity was detected in 67.7%. The most common comorbid conditions detected in patients were hypertension in 25 cases (40.3%) and diabetes in 16 cases (25.8%). In the statistical analysis of the hematological parameters before and after treatment with favipiravir, WBC, PT-PTT-INR levels were found to be unaffected; the mean RBC was found to have decreased from 4.33 ± 0.58 M/uL to 4.16 ± 0.54 M/uL (p:0.003); the median hemoglobin level was found to have decreased from 12.3 g/dl to 11.9 g/dl (p:0.041); the hematocrit level decreased from 38.1% ± 4.8 to 36.9% ± 4.2 (p:0.026); the median neutrophil count decreased from 4.57 K/uL to 3.85 K/uL (p:0.001); the mean lymphocyte count increased from 1.22 ± 0.53 K/uL to 1.84 ± 1.19 K/uL (p:0.000); and the mean platelet count increased from 244.1 ± 85.1 K/uL to 281.9 ± 103.3 K/uL (p:0.005). CONCLUSION We concluded that the pathological effect of treatment with favipiravir on the hematologic system was the suppression in the erythrocyte series, and there were no adverse effects in other hematologic parameters. RESUMO INTRODUÇÃO Este estudo tem como objetivo avaliar as alterações nos parâmetros hematológicos após o acompanhamento de pacientes que receberam tratamento com favipiravir devido à infecção por Covid-19. MÉTODOS Sessenta e dois casos em tratamento com favipiravir por pelo menos cinco dias devido à infecção por Covid-19 foram avaliados retrospectivamente. Parâmetros como idade, sexo, positividade do swab nasofaríngeo e doenças crônicas foram analisados. Os parâmetros hematológicos foram analisados antes e após o tratamento. RESULTADOS A idade média dos pacientes que receberam tratamento com favipiravir foi de 63,7±12,3 anos. A positividade do swab nasofaríngeo foi detectada em 67,7%. As condições comórbidas mais comuns detectadas nos pacientes foram hipertensão em 25 casos (40,3%) e diabetes em 16 casos (25,8%). Na análise estatística dos parâmetros hematológicos antes e após o tratamento com favipiravir, os níveis de leucócitos, PT-PTT-INR não foram afetados. Verificou-se que o RBC médio diminuiu de 4,33±0,58 M/uL para 4,16±0,54 M/uL (p=0,003); o nível médio de hemoglobina foi reduzido de 12,3 g/dl para 11,9 g/dl (p=0,041); o nível de hematócrito diminuiu de 38,1%±4,8 para 36,9%±4,2 (p=0,026); a contagem mediana de neutrófilos diminuiu de 4,57 K/uL para 3,85 K/uL (p=0,001); a contagem média de linfócitos aumentou de 1,22±0,53 K/uL para 1,84±1,19 K/uL (p=0,000); a contagem média de plaquetas aumentou de 244,1±85,1 K/uL para 281,9±103,3 K/uL (p=0,005). CONCLUSÃO Concluiu-se que o efeito patológico do tratamento com favipiravir no sistema hematológico foi a supressão na série eritrocitária e que não houve efeitos adversos em outros parâmetros hematológicos.
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- 2020
14. Use of remdesivir in patients with COVID-19: a systematic review and meta-analysis
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Tanni, Suzana E, Silvinato, Antonio, Floriano, Idevaldo, Bacha, Hélio A, Barbosa, Alexandre Naime, and Bernardo, Wanderley M
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Antiviral agents ,SARS-CoV-2 ,COVID-19 ,Antivirais - Abstract
Objective: Studies in the literature regarding the use of remdesivir to treat COVID-19 patients have shown conflicting results. This study sought to answer questions related to the use of remdesivir for the treatment of patients hospitalized with moderate to severe COVID-19. Methods: This was a systematic review and meta-analysis including phase 3 randomized clinical trials (RCTs) and observational cohort studies selected from various databases, comparing patients hospitalized with moderate to severe COVID-19 receiving remdesivir and controls. Results: A total of 207 studies were retrieved, 9 of which met the eligibility criteria and were included in the study. The meta-analysis using RCTs alone showed no statistically significant differences regarding mortality or use of mechanical ventilation/extracorporeal membrane oxygenation between remdesivir and control groups, and the quality of evidence was moderate and low, respectively. The use of remdesivir increased the recovery rate by 6% (95% CI, 3-9); p = 0.004) and the clinical improvement rate by 7% (95% CI, 1-14); p = 0.02). Additionally, no significant differences in mortality were found between remdesivir and control groups when the meta-analysis used observational cohort studies alone (risk difference = −0.01 (95% CI, −0.02 to 0.01; p = 0.32), the quality of evidence being moderate, and the risk of adverse events was 4% ([95% CI, −0.08 to 0.01]; p = 0.09). Conclusions: The use of remdesivir for the treatment of patients with moderate to severe COVID-19 had no significant impact on clinically important outcomes. RESUMO Objetivo: Estudos na literatura sobre o uso de remdesivir no tratamento de pacientes com COVID-19 têm apresentado resultados divergentes. O objetivo deste estudo foi responder a perguntas a respeito do uso de remdesivir no tratamento de pacientes hospitalizados com COVID-19 moderada a grave. Métodos: Trata-se de uma revisão sistemática e meta-análise de ensaios clínicos controlados randomizados (ECR) de fase 3 e estudos observacionais de coorte recuperados de diversos bancos de dados, comparando pacientes hospitalizados com COVID-19 moderada a grave recebendo remdesivir a controles. Resultados: Foram recuperados 207 estudos, dos quais 9 preencheram os critérios de elegibilidade e foram incluídos no estudo. A meta-análise somente dos ECR não mostrou diferenças estatisticamente significativas entre os grupos remdesivir e controle quanto à mortalidade ou ao uso de ventilação mecânica/oxigenação por membrana extracorpórea, e a qualidade das evidências foi moderada e baixa, respectivamente. O uso de remdesivir aumentou a taxa de recuperação em 6% (IC95%: 3-9; p = 0,004) e a taxa de melhora clínica em 7% (IC95%: 1-14; p = 0,02). Além disso, não foram observadas diferenças significativas entre os grupos remdesivir e controle quanto à mortalidade quando a meta-análise concentrou-se apenas nos estudos observacionais de coorte [diferença de risco = −0,01 (IC95%: −0,02 a 0,01); p = 0,32; qualidade das evidências: moderada], e o risco de eventos adversos foi de 4% (IC95%: −0,08 a 0,01; p = 0,09). Conclusões: O uso de remdesivir no tratamento de pacientes com COVID-19 moderada a grave não teve impacto significativo em desfechos clinicamente importantes.
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- 2022
15. Herpes hipertrófico perianal tratado eficazmente com imiquimod Hypertrophic perianal herpes successfully treated with imiquimod
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Sara Isabel Alcântara Lestre, Alexandre João, Célia Carvalho, and Vasco Vieira Serrão
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Antivirais ,Eficácia ,Herpes genital ,Herpesvírus humano 2 ,Terapia combinada ,Antiviral agents ,Combined modality therapy ,Efficacy ,Herpes genitalis ,Herpesvirus 2, human ,Dermatology ,RL1-803 - Abstract
A infecção pelo vírus herpes simples tipo 2 (HSV-2) é frequente em pacientes infetados pelo vírus de imunodeficiência adquirida (VIH). Nestes casos, o herpes genital pode ter uma apresentação clínica atípica. As variantes hipertróficas e vegetantes são pouco habituais. Os autores relatam um caso de herpes hipertrófico perianal em paciente infetada pelo VIH, com resposta insatisfatória ao aciclovir e valaciclovir, tratado eficazmente com imiquimod tópico. O herpes genital hipertrófico é, frequentemente, refratário aos tratamentos antivirais. Na nossa experiência, o imiquimod é um tratamento eficaz, seguro e bem tolerado que deverá ser considerado na abordagem terapêutica destes pacientes.Herpes simplex virus type 2 (HSV-2) infections are frequent in HIV (human immunodeficiency virus) infected patients. In those cases, genital herpes may have an atypical clinical presentation. Hypertrophic and vegetating variants are unusual. The authors describe a case of hypertrophic perianal herpes in an HIV patient with unsatisfactory response to acyclovir and valacyclovir, successfully treated with imiquimod. Hypertrophic genital herpes cases are frequently refractory to antiviral treatments. In our experience, imiquimod is an efficient, safe and well tolerated treatment that should be considered in therapeutic approach of these patients.
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- 2011
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16. Analysis of the sustained virological response in patients with chronic hepatitis C and liver steatosis
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Leonora De Zorzi Piccoli, Angelo Alves de Mattos, Gabriela Perdomo Coral, Ângelo Zambam de Mattos, and Diogo Edele dos Santos
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Hepatite C crônica ,Fígado gorduroso ,Antivirais ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
CONTEXT: Chronic hepatitis C as well as non-alcoholic fatty liver disease are recognized as the main cause of liver disease in Western countries. It is common to see the concomitance of the diseases and the influence of steatosis in the sustained virological response of patients with hepatitis C virus. OBJECTIVE: Assess the sustained virological response in chronic hepatitis C patients according to the presence of liver steatosis. METHODS: One hundred sixty patients with chronic hepatitis C were retrospectively evaluated. Demographic data such as gender, age, body mass index, presence of diabetes mellitus and systemic arterial hypertension, virus genotype and use of pegylated interferon were analyzed, as was the staging of fibrosis and the presence of steatosis at histology. RESULTS: Most patients were male (57.5%), with a mean age of 48 ± 9.7 years. The most frequent genotype observed was 3 (56.9%) and, in the histological evaluation, steatosis was observed in 65% of the patients (104/160). Sustained virological response in patients with steatosis occurred in 38.5%, and in 32.1% in patients without steatosis (P = 0.54). When we analyzed possible factors associated with the presence of steatosis, only body mass index and systemic arterial hypertension revealed a significant association. When the factors that influenced sustained virological response were evaluated in a logistic regression, genotype and use of pegylated interferon proved to be independent factors associated to the response. CONCLUSION: In the evaluated patients the presence of liver steatosis did not influence the sustained virological response of patients with chronic hepatitis C treated with interferon and ribavirin.
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- 2011
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17. Atividade de três drogas antivirais sobre os herpesvírus bovino tipos 1, 2 e 5 em cultivo celular Activity of three antiviral drugs against bovine herpesviruses 1, 2 and 5 in cell culture
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Renata Dezengrini, Sara C. da Silva, Marcelo Weiss, Luiz C Kreutz, Rudi Weiblen, and Eduardo F Flores
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Antivirais ,BoHV-1 ,BoHV-2 ,BoHV5 ,Foscarnet ,Ganciclovir ,Aciclovir ,Antivirals ,BoHV-5 ,Gancyclovir ,Acyclovir ,Veterinary medicine ,SF600-1100 - Abstract
A atividade de três fármacos antivirais (Aciclovir [ACV], Ganciclovir [GCV] e Foscarnet [PFA]) foi testada in vitro frente aos herpesvírus bovino tipos 1 (BoHV-1), 2 (BoHV-2) e 5 (BoHV-5). Para isso, utilizou-se o teste de reducao de placas virais em cultivo celular, testando-se diferentes concentracoes dos farmacos frente a 100 doses infectantes para 50% dos cultivos celulares (DICC50) dos respectivos virus. Pelo teste de MTT (3-(4,5-Dimethylthiazol- 2-yl)-2,5-diphenyltetrazolium bromide), verificou-se que concentracoes inferiores a 200ƒÊg/mL dos tres antivirais resultaram em indices de viabilidade de celulas MDBK e Hep2 superiores a 80%. Com base na concentracao citotoxica para 50% das celulas (CC50) e na concentracao dos farmacos efetiva para inibir em 50% o numero de placas virais (EC50), calculou-se o indice de seletividade (IS) dos antivirais para os tres herpesvirus. Assim, o ACV demonstrou ser moderadamente ativo frente ao BoHV-1 (EC50: 112,9ƒÊg/mL e IS: 4,5), ao BoHV-2 (EC50: 114,2 ƒÊg/mL e IS: 4,5) e BoHV-5 (EC50: 96,9ƒÊg/mL e IS: 5,3). O GCV apresentou atividade moderada frente ao BoHV-2 (EC50: 33,5ƒÊg/mL e IS: 16,6) e, em menor grau, contra o BoHV-5 (EC50: 123,2ƒÊg/mL e IS: 4,5), sendo ineficaz frente ao BoHV-1 (EC50: 335,8ƒÊg/mL e IS: 1,7). O PFA apresentou atividade antiviral mais pronunciada, sendo o unico farmaco que, na concentracao de 100ƒÊg/mL, inibiu completamente a producao de placas pelos tres virus testados. O PFA foi o mais efetivo in vitro frente ao BoHV-1 (EC50: 29,5ƒÊg/mL e IS: 42,2), ao BoHV-2 (EC50: 45,2ƒÊg/mL e IS: 27,6) e ao BoHV-5 (EC50: 7,8ƒÊg/mL e IS: 160,6). Portanto, os resultados obtidos indicam que o PFA pode se constituir em um candidato para terapia experimental de infeccoes pelos herpesvirus de bovinos in vivo.The activity of three anti-herpetic drugs (Acyclovir [ACV], Gancyclovir [GCV] and Foscarnet [PFA]) was tested against bovine herpesvirus 1 (BoHV-1), 2 (BoHV-2) and 5 (BoHV-5) in vitro using the plaque reduction assay. Different drug concentrations were tested against one hundred 50% tissue culture infectious dose (TCID50) of the respective viruses. Drug concentrations lower than 200μg/mL resulted in viability rates of more than 80% for MDBK and Hep2 cells in the MTT test (3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide). The selectivity index (IS) of the drugs was calculated dividing the concentration of the drug that is cytotoxic for 50% of the cells (CC50) by the concentration of the drug that was effective in reducing by 50% the number of viral plaques (EC50) for the three herpesviruses. Thus, ACV was shown to be moderately active against BoHV-1 (EC50: 112.9μg/mL; IS: 4.5), BoHV-2 (EC50: 114.2μg/mL; IS: 4.5) and BoHV-5 (EC50: 96.9μg/mL; IS: 5.3). GCV was effective against BoHV-2 (EC50: 33.5μg/mL; IS: 16.6), moderately effective against BoHV-5 (EC50: 123.2μg/mL; IS: 4.5) and poorly active against BoHV-1 (EC50: 335.8μg/mL; IS: 1.7). PFA exhibited the highest antiviral activity, being the only drug that, at concentration of 100μg/mL, completely inhibited plaque formation by all three viruses. PFA was the most effective in vitro against BoHV-1 (EC50: 29.5μg/mL; IS: 42.2), BoHV-2 (EC50: 45.2μg/mL; IS: 27.6) and BoHV-5 (EC50: 7.8μg/mL; IS: 160.6). Thus, the results indicate that PFA is a promising candidate for experimental therapeutic testing in vivo against bovine herpesviruses.
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- 2010
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18. Efeitos do Foscarnet sobre a infecção pelos herpesvírus bovino tipos 1 e 5 em coelhos Effects of Foscarnet on the infection by bovine herpesviruses 1 and 5 in rabbits
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Renata Dezengrini, Sara C. da Silva, Marcelo Weiss, Mauro S. de Oliveira, Carolina K. Traesel, Rudi Weiblen, and Eduardo F. Flores
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Antivirais ,BoHV-1 ,BoHV-5 ,PFA ,coelhos ,Antivirals ,rabbits ,Veterinary medicine ,SF600-1100 - Abstract
O efeito antiviral do Foscarnet (PFA) foi demonstrado anteriormente em células de cultivo infectadas com três herpesvírus bovino (BoHV). No presente estudo, investigaram-se os seus efeitos sobre a infecção e doença causadas pelo BoHV-1 e BoHV-5 em coelhos infectados experimentalmente. Coelhos inoculados com o BoHV-5 pela via intraconjuntival (IC) e tratados com o PFA (100mg/kg/dia) a partir do dia 1 pós-inoculação (pi) apresentaram uma redução nos títulos de vírus excretados entre os dias 2 e 6 pi em comparação com o grupo não-tratado; essa diferença foi significativa no dia 3 pi [F(9,108) = 2,23; PThe activity of Foscarnet (PFA) against three bovine herpesviruses (BoHVs) was previously demonstrated in cell culture. Herein we evaluated the effects of PFA on the infection and disease by BoHV-1 and BoHV-5 in a rabbit model. Rabbits inoculated with BoHV-5 in the conjunctival sac (IC) and treated with PFA (100 mg/kg/day) from day 1 to 17 post-inoculation (pi) shed less virus between days 2 and 6 pi comparing to untreated controls; this difference was significant at day 3 pi [F(9,108) = 2,23; P
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- 2010
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19. Dolabellane diterpenes from the Caribbean soft corals Eunicea laciniata and Eunicea asperula and determination of their anti HSV-1 activity.
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Amaya-García, Fabián, Sanchez Nuñez, Maria Leonisa, Ramos, Freddy A., Puyana, Mónica, Nunes de Palmer Paixão, Izabel Christina, Laneuville Teixeira, Valeria, and Castellanos, Leonardo
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DITERPENES , *ANTIVIRAL agents , *ANTI-infective agents , *NUCLEAR magnetic resonance , *ACYCLOVIR - Abstract
Dolabellane diterpenes have considerable antiviral activity, but most studies have been focused towards compounds isolated from Dictyota brown algae. Although soft corals are also a significant source of these diterpenes, their antiviral potential has not been studied in detail. With the aim of assessing the biological activity o f marine sources, we evaluated the dolabellane content in the soft corals Eunicea laciniata and E. asperula collected in Santa Marta, Colombian Caribbean. Dolabellanes 1-6 were isolated from E. laciniata while compounds 2, 4 and 5 were isolated from E. asperula. A ll compounds were identified by NMR, GC-EIMS, optical rotation and comparison with previously reported dolabellanes. GC-EIMS analyses showed that dolabellatrienone (2 ) transforms into compounds 4 and 5 as oxidation products upon prolonged storage; however, those compounds were also naturally present in the extract of the studied organisms. Pure dolabellanes were tested in vitro in antiviral assays against HSV-1. Compound 6 inhibited virus replication in infected cells (73.7% of inhibition at 50 ^M ) without cytotoxic effect (CC50 = 95 9), showing similar activity to the positive control Acyclovir®. Thus, compound 6 is an interesting candidate for further studies o f dolabellanes as antivirals. [ABSTRACT FROM AUTHOR]
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- 2017
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20. Efeito das propriedades terapêuticas e antivirais da própolis no combate ao SARSCoV-2: uma revisão sistemática.
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Maia Cavalcanti Furtado, Anny Elizabeth
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Copyright of Revista da Associação Brasileira de Nutrição is the property of Associacao Brasileira de Nutricao and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2022
21. Synthesis and evaluation of chalcones O-prenylated against mayaro and oropuche viruses
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Lemos, Rodrigo Raposo de, Universidade Estadual Paulista (Unesp), and Regasini, Luis Octavio [UNESP]
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Vírus Oropouche ,Arbovirosis ,Chalcone ,Oropouche virus ,Antiviral ,Arboviroses ,Mayaro virus ,Vírus Mayaro ,Antivirais - Abstract
Submitted by Rodrigo Raposo De Lemos (r.lemos@unesp.br) on 2022-07-15T11:28:31Z No. of bitstreams: 1 Dissertação corrigida.pdf: 2220609 bytes, checksum: 1592429413c071b64a9973261a967bb3 (MD5) Rejected by Vivian Letícia Duarte Parisi (vivian.parisi@unesp.br), reason: Sua submissão será devolvida para que você possa fazer as correções. 1. A paginação deve ser sequencial, iniciando a contagem na folha de rosto e mostrando o número a partir da introdução, a ficha catalográfica ficará após a folha de rosto e não deverá ser contada. 2. Nos agradecimentos, segundo a Portaria nº 206, de 4 de setembro de 2018, todos os trabalhos que tiveram financiamento/BOLSA CAPES deve constar a expressão exata: "O presente trabalho foi realizado com apoio da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Código de Financiamento 001 3. Nas referências, na página 56, tem um espaço, não sei se foi proposital ou se desconfigurou. Lembramos que o arquivo depositado no repositório deve ser igual ao impresso, o rigor com o padrão da Universidade se deve ao fato de que o seu trabalho passará a ser visível mundialmente. Agradecemos a compreensão. Estamos à disposição caso necessite esclarecer alguma dúvida ou necessite algum auxílio para efetuar as correções. Atenciosamente, Repositório Institucional UNESP UNESP - Câmpus de São José do Rio Preto Rua Cristóvão Colombo, 2265 - Jd. Nazareth São José do Rio Preto – SP. on 2022-07-15T14:19:39Z (GMT) Submitted by Rodrigo Raposo De Lemos (r.lemos@unesp.br) on 2022-10-13T20:16:18Z No. of bitstreams: 1 Rodrigo 13_10.docx: 2721286 bytes, checksum: ef422cf14fdb05b2a791b4bf24c7abdf (MD5) Rejected by Vivian Letícia Duarte Parisi (vivian.parisi@unesp.br), reason: Sua submissão será devolvida para que você possa fazer as correções. 1. O seu arquivo está no formato Word, é necessário que o arquivo contendo a sua dissertação/tese esteja no formato PDF - (Portable Document Format) e não esteja protegido. 2. A data na capa e na folha de rosto deve estar 2021, que foi o ano da publicação. Lembramos que o arquivo depositado no repositório deve ser igual ao impresso, o rigor com o padrão da Universidade se deve ao fato de que o seu trabalho passará a ser visível mundialmente. Agradecemos a compreensão. Estamos à disposição caso necessite esclarecer alguma dúvida ou necessite algum auxílio para efetuar as correções. Atenciosamente, Repositório Institucional UNESP UNESP - Câmpus de São José do Rio Preto Rua Cristóvão Colombo, 2265 - Jd. Nazareth São José do Rio Preto – SP. on 2022-10-14T13:00:59Z (GMT) Submitted by Rodrigo Raposo De Lemos (r.lemos@unesp.br) on 2022-10-16T18:45:17Z No. of bitstreams: 1 Rodrigo 13_10.pdf: 2777001 bytes, checksum: 4fb165b72b2bf4ea3c2f28939428c118 (MD5) Approved for entry into archive by Vivian Letícia Duarte Parisi (vivian.parisi@unesp.br) on 2022-10-17T13:50:15Z (GMT) No. of bitstreams: 1 lemos_rr_me_sjrp.pdf: 2777001 bytes, checksum: 4fb165b72b2bf4ea3c2f28939428c118 (MD5) Made available in DSpace on 2022-10-17T13:50:15Z (GMT). No. of bitstreams: 1 lemos_rr_me_sjrp.pdf: 2777001 bytes, checksum: 4fb165b72b2bf4ea3c2f28939428c118 (MD5) Previous issue date: 2021-10-25 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Os vírus Oropouche (OROV) e Mayaro (MAYV) são vírus envelopados causadores da febre oropouche e mayaro, respectivamente. Ambas as infecções podem ser consideradas como zoonoses emergentes e possuem sintomas semelhantes a outras arboviroses, o que dificulta o diagnóstico clínico, causando uma consequente ampla subnotificação nos países da América Latina e Caribe. Não existem vacinas e fármacos disponíveis para a profilaxia e tratamento das infecções por OROV e MAYV. Dessa forma, torna-se necessária a busca e o desenvolvimento de novas substâncias, capazes de interromper o ciclo replicativo desses vírus. Nesse contexto, chalconas podem ser um grupo químico de partida promissor para essa investigação, uma vez que apresentam atividade antiviral contra vários vírus, incluindo o vírus da dengue (DENV), vírus da imunodeficiência humana tipo I (HIV-1), vírus do mosaico do tabaco (TMV) e citomegalovírus (CMV). Nesse presente trabalho foram sintetizadas dez chalconas O-preniladas por meio de duas etapas; (i) reação de O-prenilação do seringaldeído e (ii) reação de Claisen-Schmidt entre os seringaldeído O-prenilado e respectivas acetofenonas. Os rendimentos globais dessas reações variaram de 3% a 17%. As substâncias foram purificadas utilizando cromatografia em coluna de fase normal e de permeação em gel. As estruturas das substâncias foram confirmadas por meio da análise dos espectros de Ressonância Magnética Nuclear de Hidrogênio. Os procedimentos químicos permitiram a obtenção dos produtos isolados em quantidades e pureza adequadas aos ensaios de toxicidade contra células Vero E6 e antiviral. Sete chalconas O-preniladas demonstraram toxicidade contra células Vero E6 na maioria das concentrações testadas e ausente ou fraca inibição da replicação de OROV e MAYV. A chalcona 17, substituída por um grupo amina na posição 2’ do anel A colaborou com uma viabilidade celular em 50% das células Vero E6 infectadas por OROV a 4,7 μM e 9,4 μM. Oropouche (OROV) and Mayaro (MAYV) are enveloped virus, which are able to cause Oropouche and Mayaro fevers, respectively. Both infections are emergent zoonosis and possess similar symptoms to other arbovirosis, avoiding their clinical diagnosis and subnotifications in Latin America and Caribbean countries. There are not vaccines and drugs to prophylaxis and treatment of OROV and MAYV infections. Thus, the search and development of new compounds is necessary, which are able to finish the replicative cycle of these virus. In this context, chalcones can be starting and promising chemical group to this investigation, considering their antiviral activity against other viruses, including DENV, HIV- 1, TMV and CMV. In this current work, 10 O-prenylated chalcones were synthesized in two steps; (i) O-prenylation reaction of syringaldehyde and (ii) Claisen-Schmidt reaction between O-prenylated syringaldehyde and respective acetophenones. Global yields of these reactions ranged from 3% to 17%. Compounds were purified by chromatographic column separations over normal and gel permeation phases. Structure of compounds were confirmed by Nuclear Magnetic Resonance spectral analyses. Chemical procedures led to isolated products in adequate amounts and purity to toxicity assays against vero E6 cells and antiviral assays. Seven O-prenylated chalcones demonstrated toxicity against Vero E6 cells in tested concentrations and absence or weak inhibition of OROV and MAYV replication. Chalcone 17, which is substituted by amino group at position 2’ on ring A, exhibted 50% cell viability of vero E6 cells infected by OROV at 4.7 µM and 9.4 µM. 88882.434312/2019-01
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- 2021
22. Novos alvos farmacológicos contra a COVID-19: o uso de Interferons para a ativação do estado antiviral e eliminação do vírus SARC-CoV-2
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Mainardo Rodrigues Bezerra, Lucas, Carvalho Neto, Pedro Oliveira, Silva, Fernando José de Morais, Ramos, Madelyne Alice Brito, Cardoso, Ana Maria Santos, Sousa, Elisiel Martins de, Sousa Neto, Moacir Ximenes, Alencar , Tássia Layane Pontes, and Souza, Luan Kelves Miranda de
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Coronavírus ,Coronavirus ,Interferons ,Interferones ,Antivirales ,Antiviral Agents ,Antivirais - Abstract
SARS-CoV-2 virus, cause of COVID-19 disease, was described at first in Wuhan (China) December 2019, infecting more than 170 million people. During viral infection, innate immune system initially acts with cell signaling leading to the production and release of pro-inflammatory cytokines, mostly characterized by low levels of interferons (IFNs), which stimulate the expression of genes that contribute to the displacement of host cells towards an antiviral state. In the SARS-CoV-2, the expression and functions of IFN-I are relatively suppressed. This study aims to evaluate the therapeutic potential of using Interferon in activating the antiviral state, especially in the early stages of the disease. This is an integrative literature review, using an exploratory and descriptive methodology. The data were organized in order to list the studies related to the theme in question, the filtering of the articles found had as inclusion criteria, articles in the years 2020 and 2021 (except for one of them, in the year of 2015), in the languages: Portuguese, English and Spanish. Considering that SARS-CoV-2 suppresses the expression of IFN-I and the genes induced by IFN, interrupting the immune defense mechanisms, there is a relationship of IFN suppression with the worsening of the clinical picture in patients with COVID-19. So that, literature elucidates that the exogenous administration of IFN-I has been shown to reduce the severity of symptoms, however, this mechanism needs to be analyzed more clearly. El virus SARS-CoV-2, que causa la enfermedad COVID-19, se describió por primera vez en diciembre de 2019 en la ciudad de Wuhan, China, infectando a más de 170 millones de personas. Durante la infección viral, el sistema inmunológico innato actúa inicialmente con la señalización celular que conduce a la producción y liberación de citocinas proinflamatorias, caracterizadas principalmente por niveles bajos de interferones (IFN), que estimulan la expresión de genes que contribuyen al desplazamiento de las células huésped. hacia un estado antiviral. Durante el SARS-CoV-2, la expresión y funciones de IFN-I están relativamente suprimidas. Este estudio tiene como objetivo evaluar el potencial terapéutico del uso de interferón para activar el estado antiviral, especialmente en las primeras etapas de la enfermedad. Se trata de una revisión integradora de la literatura, utilizando una metodología exploratoria y descriptiva. Los datos fueron organizados con el fin de enumerar los estudios relacionados con la temática en cuestión, el filtrado de los artículos encontrados tuvo como criterios de inclusión, artículos en los años 2020 y 2021 (excepto uno de ellos, en el año 2015), en el idiomas: portugués, inglés y español. Considerando que el SARS-CoV-2 suprime la expresión de IFN-I y los genes inducidos por IFN, interrumpiendo los mecanismos de defensa inmunológica, existe una relación de supresión de IFN con el empeoramiento del cuadro clínico en pacientes con COVID- 19. Con esto, la literatura aclara que la administración exógena de IFN-I ha demostrado reducir la severidad de los síntomas, sin embargo, este mecanismo necesita ser analizado con mayor claridad. O vírus SARS-CoV-2, causador da doença COVID-19, foi descrito pela primeira vez em dezembro de 2019, na cidade de Wuhan, China, infectando mais de 170 milhões de pessoas. No decorrer da infecção viral, o sistema imunológico inato atua inicialmente com a sinalização celular levando a produção e liberação de citocinas pró-inflamatórias, caracterizadas na maioria das vezes por baixos níveis de interferons (IFNs), que estimulam a expressão de genes que contribuem para o deslocamento das células hospedeiras em direção a um estado antiviral. No decurso da SARS-CoV-2, a expressão e, as funções dos IFN-I são relativamente suprimidas. Este estudo tem como objetivo avaliar o potencial terapêutico do uso do Interferon na ativação do estado antiviral, principalmente nas fases iniciais da doença. Trata-se de uma revisão integrativa da literatura, utilizando-se de uma metodologia exploratória e descritiva. Os dados foram organizados de forma a elencar os estudos relacionados à temática em questão, a filtragem dos artigos encontrados teve como critério de inclusão, artigos nos anos de 2020 e 2021(com exceção de um deles, no ano de 2015), nos idiomas: português, inglês e espanhol. Considerando que o SARS-CoV-2 suprime a expressão do IFN-I e os genes induzidos por IFN, interrompendo os mecanismos de defesa imunológica, nota-se relação da supressão dos IFN com o agravamento do quadro clínico em pacientes com COVID-19. Com isso, a literatura elucida que a administração exógena de IFN-I mostra reduzir a gravidade dos sintomas, porém, esse mecanismo precisa ser analisado com maior clareza.
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- 2021
23. Taxa de resposta viral sustentada em pacientes de hepatite C crônica tratados com antivirais de ação direta
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Antonio Cardoso Sparvoli, Carla Vitola Gonçalves, Andréa Delfino Torres, and Jucéli Maria Hendges Sparvoli
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Male ,medicine.medical_specialty ,Epidemiology ,Hepatitis C virus ,RC799-869 ,medicine.disease_cause ,Chronic hepatitis C ,Antivirais ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,medicine ,Blood test ,Humans ,030212 general & internal medicine ,Prospective Studies ,Prospective cohort study ,Hepatite C crônica ,Epidemiologia ,Aged ,Retrospective Studies ,Sustained virologic response ,medicine.diagnostic_test ,business.industry ,Resposta viral sustentada ,Gastroenterology ,Hepatitis C ,Hepatitis C, Chronic ,Middle Aged ,Viral Load ,Diseases of the digestive system. Gastroenterology ,medicine.disease ,Exact test ,Treatment Outcome ,Antiviral agents ,Quality of Life ,030211 gastroenterology & hepatology ,Observational study ,Drug Therapy, Combination ,Female ,business ,Viral load - Abstract
BACKGROUND: In recent years the management of hepatitis C virus infection and the possibility of its eradication have been researched due to the importance that they represent in the health of the world population. Obtaining data that help to cope with this pathology improves the quality of life of those affected by it. The present study evaluated the effectiveness of direct-acting antiviral therapies provided by the Brazilian Ministry of Health in accordance to the Clinical Protocol and Therapeutic Guidelines of 2015. OBJECTIVE: To evaluate the epidemiological profile of patients with chronic hepatitis C and the rate of sustained virologic response using direct-acting antivirals of all individuals that attended the referral service for the treatment of chronic hepatitis C at the Hospital of the Federal University of Rio Grande. METHODS: This was an observational, retrospective/prospective study with all patients with chronic hepatitis C who had their treatments available from December 2015 to August 2017 according to the criteria of the Clinical Protocol and Therapeutic Guidelines of 2015. In the first phase, the clinical and demographic variables of all individuals enrolled in a treatment for hepatitis C were selected and collected from the Reference Service database. In the second phase, treatment data were collected. The outcome variable, sustained virologic response, was defined as an undetectable viral load on the blood test three months after the end of treatment. The descriptive and bivariate analyzes were performed with Pearson’s chi-square and Fisher’s Exact test, adopting a P value ≤0.05 in the SPSS 20 software. RESULTS: Of the 252 participants in the study, 228 (90.5%) had a sustained virologic response, 55.2% were male with an average age of 58.6 years (SD±9.1). Genotype 1 was the most prevalent, observed in 54.4% of the participants, and 87.4% of the patients had moderate/advanced hepatic fibrosis. After the statistical analysis, it was observed that the individuals with genotype 3 and moderate/advanced hepatic fibrosis had lower sustained virologic response rate (P=0.05 and P=0.04, respectively). CONCLUSION: It was observed that the use of direct-acting antivirals, in comparison to previous therapeutic regimens, increases the sustained virologic response, reaching all patients with mild fibrosis. This study provides information that helps in the hepatitis C treatment by showing that prescribing early treatment for patients without hepatic fibrosis and/or genotype 3 virus could increase therapeutic effectiveness. RESUMO CONTEXTO: O manejo e a possibilidade de erradicação da infecção pelo vírus da hepatite C têm sido muito pesquisados nos últimos anos pela importância que representam na saúde pública para a população mundial. A obtenção de dados que auxiliem o enfrentamento dessa patologia resulta na melhor qualidade de vida dos seus portadores. O presente estudo avaliou a efetividade da terapêutica com os antivirais de ação direta, fornecida pelo Ministério da Saúde, através do Protocolo Clínico e Diretrizes Terapêuticas de 2015. OBJETIVO: Avaliar o perfil epidemiológico dos portadores de hepatite C crônica e a taxa de resposta viral sustentada com o uso dos antivirais de ação direta em todos os indivíduos atendidos no Centro de Referência no tratamento da hepatite C crônica do Hospital Universitário da Universidade Federal do Rio Grande. MÉTODOS: Estudo observacional retrospectivo/prospectivo com todos os portadores de hepatite C crônica que tiveram seus tratamentos disponibilizados no período de dezembro de 2015 a agosto de 2017 segundo os critérios do Protocolo Clínico e Diretrizes Terapêuticas de 2015. Na primeira fase foram selecionadas e coletadas as variáveis demográficas e clínicas, no banco de dados do centro de referência de todos os indivíduos cadastrados para tratamento para hepatite C e na segunda fase foram coletados dados referentes ao tratamento. A variável desfecho, resposta viral sustentada, foi definida pela carga viral indetectável no exame sanguíneo três meses após o término do tratamento. Foram realizadas as análises descritivas e bivariadas com cálculo do qui quadrado de Pearson e Exato de Fisher, adotando um valor P≤0,05, no programa SPSS 20. RESULTADOS: Dos 252 participantes do estudo 228 (90,5%) obtiveram resposta viral sustentada, sendo 55,2% do sexo masculino com média de idade de 58,6 anos (DP±9,1). O genótipo 1 foi o mais prevalente, presente em 54,4% dos participantes, 87,4% dos estudados apresentavam grau de fibrose hepática moderada/avançada. Após a análise estatística observou-se que os indivíduos com genótipo 3 e fibrose hepática moderada/avançada, tiveram menor taxa de resposta viral sustentada (P=0,05 e P=0,04 respectivamente). CONCLUSÃO: Observou-se que com o uso dos antivirais de ação direta as taxas de resposta viral sustentada foram altas, em relação aos esquemas terapêuticos anteriores, podendo chegar à totalidade nos pacientes com fibrose leve. Este estudo mostra que a realização do tratamento precoce, ou seja, de forma antecipada em pacientes sem fibrose hepática e genótipo 3 pode aumentar a taxa de sucesso.
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- 2019
24. Survival of adult AIDS patients in a reference hospital of a metropolitan area in Brazil
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Maria F Guerreiro, Ligia RS Kerr-Pontes, Rosa S Mota, Marcondes C França Jr., Fábio F Távora, and Iusta Caminha
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Síndrome de imunodeficiência adquirida ,Sobrevivência ,Antivirais ,Fatores socioeconômicos ,Escolaridade ,Terapia anti-retroviral ,Public aspects of medicine ,RA1-1270 - Abstract
OBJECTIVE: To evaluate the influence of sociodemographic, clinical, and epidemiological factors in AIDS patients survival in a reference hospital. METHODS: A sample of 502 adult AIDS patients out of 1,494 AIDS cases registered in a hospital in Fortaleza, Brazil, was investigated between 1986 and 1998. Sixteen cases were excluded due to death at the moment of the AIDS diagnosis and 486 were analyzed in the study. Socioeconomic and clinical epidemiological were the variables studied. Statistical analysis was conducted using the Kaplan-Meier survival analysis and the Cox proportional hazards model. RESULTS: Three hundred and sixty two out of the 486 patients studied took at least one antiretroviral drug and their survival was ten times longer than those who did not take any drug (746 and 79 days, respectively, p
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- 2002
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25. Hepatitis C in Hemodialysis Units: diagnosis and therapeutic approach
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Maria Lucia Gomes Ferraz, Carmen Tzanno Branco Martins, Paulo Lisboa Bitencourt, Angiolina Kraychete, Natasha Silva Constancio, and Marcelo Mazza do Nascimento
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Nephrology ,Societies, Scientific ,medicine.medical_specialty ,Hepatitis C virus ,medicine.medical_treatment ,Population ,Diálise Renal ,Hepacivirus ,lcsh:RC870-923 ,medicine.disease_cause ,Antiviral Agents ,Antivirais ,Insuficiência Renal Crônica ,03 medical and health sciences ,0302 clinical medicine ,Renal Dialysis ,Internal medicine ,Hepatitis Viruses ,Disease Transmission, Infectious ,Prevalence ,Medicine ,Humans ,RNA Viruses ,030212 general & internal medicine ,Renal Insufficiency, Chronic ,Intensive care medicine ,education ,Review Articles ,education.field_of_study ,Cross Infection ,Disease Eradication ,Vírus de Hepatite ,business.industry ,General Medicine ,Hepatitis C ,Hepatology ,lcsh:Diseases of the genitourinary system. Urology ,medicine.disease ,Hepatite C ,030211 gastroenterology & hepatology ,Hemodialysis ,business ,Brazil ,Kidney disease ,Glomerular Filtration Rate - Abstract
According to data from the last census of the Brazilian Society of Nephrology (SBN), the prevalence of hepatitis C virus (HCV) in Brazilian hemodialysis units (HU) is 3.3%, about three times higher than what is reported for the Brazilian general population. Often, professionals working in HU are faced with clinical situations that require rapid HCV diagnosis in order to avoid horizontal transmission within the units. On the other hand, thanks to the development of new antiviral drugs, the cure of patients with HCV, both in the general population and in patients with chronic kidney disease and the disease eradication, appear to be very feasible objectives to be achieved in the near future . In this scenario, SBN and the Brazilian Society of Hepatology present in this review article a proposal to approach HCV within HUs. Resumo De acordo com os dados do último censo da Sociedade Brasileira de Nefrologia (SBN), a prevalência de portadores do vírus da hepatite C (HCV) nas unidades de hemodiálise (UH) no Brasil é de 3,3%, cerca de três vezes maior do que é observado na população geral brasileira. Muitas vezes, os profissionais que trabalham nas UH deparam-se com situações clínicas que demandam rápido diagnóstico do HCV, a fim de evitar uma transmissão horizontal dentro das unidades. Por outro lado, a cura dos pacientes portadores do HCV, tanto na população geral como na portadora de doença renal crônica e a erradicação da doença, em virtude do desenvolvimento de novas drogas antivirais, parecem ser objetivos bastante factíveis, a ser alcançados em futuro próximo. Nesse cenário, a SBN e a Sociedade Brasileira de Hepatologia apresentam neste artigo de revisão uma proposta de abordagem do HCV dentro das UH.
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- 2019
26. Development of Machine Learning Models and the Discovery of a New Antiviral Compound against Yellow Fever Virus
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Glaucius Oliva, Vadim Makarov, Andre S. Godoy, Olga B. Riabova, V.O. Gawriljuk, Sean Ekins, Ana C. Puhl, Kimberley M. Zorn, Thomas J. Lane, and Daniel H. Foil
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General Chemical Engineering ,High-throughput screening ,ANTIVIRAIS ,Library and Information Sciences ,Biology ,Machine learning ,computer.software_genre ,Antiviral Agents ,Virus ,Article ,Dengue fever ,Machine Learning ,Drug treatment ,Drug Discovery ,Yellow Fever ,medicine ,Animals ,business.industry ,Drug discovery ,Zika Virus Infection ,Yellow fever ,General Chemistry ,Zika Virus ,medicine.disease ,Computer Science Applications ,Drug development ,Vaccination coverage ,Artificial intelligence ,Yellow fever virus ,business ,computer - Abstract
Yellow fever (YF) is an acute viral hemorrhagic disease transmitted by infected mosquitoes. Large epidemics of YF occur when the virus is introduced into heavily populated areas with high mosquito density and low vaccination coverage. The lack of a specific small molecule drug treatment against YF as well as for homologous infections, such as zika and dengue, highlights the importance of these flaviviruses as a public health concern. With the advancement in computer hardware and bioactivity data availability, new tools based on machine learning methods have been introduced into drug discovery, as a means to utilize the growing high throughput screening (HTS) data generated to reduce costs and increase the speed of drug development. The use of predictive machine learning models using previously published data from HTS campaigns or data available in public databases, can enable the selection of compounds with desirable bioactivity and absorption, distribution, metabolism, and excretion profiles. In this study, we have collated cell-based assay data for yellow fever virus from the literature and public databases. The data were used to build predictive models with several machine learning methods that could prioritize compounds for in vitro testing. Five molecules were prioritized and tested in vitro from which we have identified a new pyrazolesulfonamide derivative with EC50 3.2 μM and CC50 24 μM, which represents a new scaffold suitable for hit-to-lead optimization that can expand the available drug discovery candidates for YF.
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- 2021
27. The use of antiviral Phthalocyanine mouthwash as a preventive measure against COVID-19
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Fabiano Vieira, Vilhena, Verônica Caroline, Brito Reia, Bernardo, da Fonseca Orcina, Caíque Andrade, Santos, Mariana, Zangrando, Rodrigo, Cardoso de Oliveira, and Paulo Sérgio, da Silva Santos
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ddc: 610 ,ANTIVIRAIS ,610 Medical sciences ,Medicine ,Article - Abstract
[for full text, please go to the a.m. URL], GMS Hygiene and Infection Control; 16:Doc24
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- 2021
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28. Tipo de terapêutica e fatores de prognóstico na paralisia de Bell: estudo retrospectivo de cinco anos em um hospital português.
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Mendes Ferraria, Lília Andreia, De Almeida Pinto Da Silva, Maria Inês, Carneirinho Rosa, Maria Helena, and Carvalho Jerónimo Antunes, Luis Alberto
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FACIAL paralysis ,ADRENOCORTICAL hormones ,ANTIVIRAL agents ,PATIENTS - Abstract
Copyright of Scientia Medica is the property of EDIPUCRS - Editora Universitaria da PUCRS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2016
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29. CINÉTICA DE INFECÇÃO DO VÍRUS VACCINIA EM CÉLULAS VERO: PERSPECTIVAS PARA UTILIZAÇÃO COMO MODELO EXPERIMENTAL NA AVALIAÇÃO DE DROGAS ANTI-ORTHOPOXVÍRUS.
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Paulini Junior, Inarei Jose
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Vaccinia virus (VACV) is responsible for vesicular illness in cattle and humans, and infections caused by these virus have been frequently reported in the last 10 years in Brazil. The aim of this study was to monitor the replication intervals and assembly of VACV - WR (Western Reserve) in Vero cells in order to expose the main means of blocking the replicative cycle. Vero cells were infected with 0.1 m.o.i . Subsequently, they were fixed at intervals of 6, 12, 18, 24, 30, 36, 42, 48 hours post-infection and processed by transmission electron microscopy. The multiplication of VACV- WR in Vero cells produced cytopathic effect (fusion of membranes and vacuoles syncytia) in approximately 90% of the cells. Analysis of electron micrographs allowed us to display in detail the CPE, the dynamics of cellular metabolic disorders and viral replicative cycle until the formation of the extracellular viral particle. Thus, this study was able to demonstrate potential therapeutic targets for inhibit replication of VACV - WR and new approaches in antiviral drugs. [ABSTRACT FROM AUTHOR]
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- 2015
30. Riesgo de Recurrencia del Carcinoma Hepatocelular tras el Uso de Antivirales de Acción Directa en el Tratamiento de la Hepatitis C: Revisión Sistemática y Metanálisis
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Cuba, Jefferson Wrublack, Anjos, Amanda da Silva, Toderke, Edimar Leandro, and Kwiatkowski, Filipe Vieira
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Carcinoma Hepatocelular/etiología ,Hepatite C/complicações ,Recurrence ,Hepatitis C/complications ,Carcinoma Hepatocelular/etiologia ,Recurrencia ,Hepatitis C/complicaciones ,Antivirales ,Carcinoma, Hepatocellular/etiology ,Antiviral Agents ,Recidiva ,Antivirais - Abstract
Introduction: Hepatitis C is associated with the development of hepatocellular carcinoma (HCC). The interferon-based therapeutic regimen has been replaced by direct-acting antivirals (AAD) to treat HCV virus infection. However, recent studies have shown an unexpected increase in HCC recurrence in patients treated with AAD to resolve hepatitis C. Objective: To assess the risk of hepatocarcinoma recurrence after using AAD in patients with HCV infection. Method: A survey was carried out in PubMed, MEDLINE, and LILACS databases according to the descriptors DeCS/MeSH ((hepatocellular carcinoma) AND recurrence) AND Directacting antiviral. The review followed the PRISMA protocol and is registered on the PROSPERO platform. The data statistical analysis was performed through RStudio software. Results: Seven articles were selected resulting in 847 patients. Among those treated with AAD, the recurrence rate varied between 11.1% to 42.1% and, in the control group, it occurred in 5% to 65.6% of the patients. The relative risk (RR) of recurrence of HCC in the group of patients who received AAD was less than the risk evidenced in the control group, although there is no statistical significance (RR 0.71 95% CI [0.55; 0.93] I2=38%, p=0.14). The mean time until the diagnosis of recurrence was 9.35 months in the group exposed to therapy and 13.42 months in the control group. Conclusion: It is suggested that therapy with AAD does not increase the risk of HCC recurrence compared to control groups. In patients who developed recurrence, it occurred more frequently within the first year after the introduction of AAD. Introducción: La hepatitis C está asociada con el desarrollo de carcinoma hepatocelular (CHC). El régimen terapéutico basado en interferón ha sido reemplazado por antivirales de acción directa (AAD) para tratar la infección por VHC. Sin embargo, estudios recientes han mostrado un incremento inesperado en la recurrencia del CHC en pacientes tratados con AAD para resolución de la hepatitis C. Objetivo: Evaluar el riesgo de recurrencia del hepatocarcinoma después de usar AAD en pacientes con infección por VHC. Método: Se realizo una pesquisa en las bases de datos PubMed, MEDLINE y LILACS según los descriptores DeCS/MeSH ((carcinoma hepatocelular) AND recurrencia) AND antiviral de acción directa. La revisión siguió el protocolo PRISMA y está registrada en la plataforma PROSPERO. El análisis estadístico de los datos se realizó mediante el software RStudio. Resultados: Fueron seleccionados 7 artículos resultando en 847 pacientes. Entre los tratados con AAD, la tasa de recurrencia vario entre el 11,1% y el 42,1% y, en el grupo de control, ocurrió entre el 5% y el 65,6% de los pacientes. El riesgo relativo (RR) de recurrencia del CHC en el grupo de pacientes que recibieron AAD fue inferior que el riesgo evidenciado en el grupo control, aunque no hay significación estadística (RR 0,71; IC del 95% [0,55; 0,93] I2=38%, p=0,14). El tiempo hasta el diagnostico de recidiva fue de 9,35 meses en el grupo expuesto a terapia y de 13,42 meses en el grupo control. Conclusión: Se sugiere que la terapia con AAD no aumenta el riesgo de recurrencia del CHC en comparación con los grupos control. En los pacientes que desarrollaron recurrencia, esta ocurrió con mayor frecuencia durante el primer año después de la introducción de los AAD. Introdução: A hepatite C está associada ao desenvolvimento do carcinoma hepatocelular (CHC). O regime terapêutico baseado em interferon vem sendo substituído pelos antivirais de ação direta (AAD) para tratamento da infecção pelo vírus da hepatite C (HCV). Contudo, estudos recentes evidenciaram um aumento inesperado da recorrência do CHC em pacientes tratados com AAD para resolução da hepatite C. Objetivo: Avaliar o risco de recorrência de hepatocarcinoma após uso de AAD em pacientes com infecção por HCV. Método: Realizou-se um levantamento nas bases de dados PubMed, MEDLINE e LILACS de acordo com os descritores DeCS/MeSH ((hepatocellular carcinoma) AND recurrence) AND Direct-acting antiviral. A revisão obedeceu ao protocolo PRISMA e está cadastrada na plataforma PROSPERO. A análise estatística dos dados foi realizada no software RStudio. Resultados: Sete artigos foram selecionados resultando em 847 pacientes. Entre os tratados com AAD, a taxa de recorrência variou entre 11,1% e 42,1% e, no grupo controle, ocorreu em 5% a 65,6% dos pacientes. O risco relativo (RR) de recorrência do CHC no grupo de pacientes que recebeu AAD foi menor do que o risco evidenciado no grupo controle, apesar de não haver significância estatística (RR 0,71 95% IC [0,55;0,93] I2=38%, p=0,14). O tempo até o diagnóstico da recorrência teve uma média de 9,35 meses no grupo exposto a terapia e 13,42 meses no grupo controle. Conclusão: Sugere-se que a terapia com AAD não aumenta o risco de recorrência do CHC em comparação com grupos controle. Nos pacientes que desenvolveram recorrência, ocorreu com maior frequência dentro do primeiro ano após introdução dos AAD.
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- 2021
31. Risco de Recorrência do Carcinoma Hepatocelular após o Uso de Antivirais de Ação Direta no Tratamento de Hepatite C: Revisão Sistemática e Metanálise
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Amanda da Silva Anjos, Filipe Vieira Kwiatkowski, Edimar Leandro Toderke, and Jefferson Wrublack Cuba
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Hepatite C/complicações ,Carcinoma Hepatocelular/etiologia ,General Engineering ,General Earth and Planetary Sciences ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 ,General Environmental Science ,Recidiva ,Antivirais - Abstract
Introdução: A hepatite C está associada ao desenvolvimento do carcinoma hepatocelular (CHC). O regime terapêutico baseado em interferon vem sendo substituído pelos antivirais de ação direta (AAD) para tratamento da infecção pelo vírus da hepatite C (HCV). Contudo, estudos recentes evidenciaram um aumento inesperado da recorrência do CHC em pacientes tratados com AAD para resolução da hepatite C. Objetivo: Avaliar o risco de recorrência de hepatocarcinoma após uso de AAD em pacientes com infecção por HCV. Método: Realizou-se um levantamento nas bases de dados PubMed, MEDLINE e LILACS de acordo com os descritores DeCS/MeSH ((hepatocellular carcinoma) AND recurrence) AND Direct-acting antiviral. A revisão obedeceu ao protocolo PRISMA e está cadastrada na plataforma PROSPERO. A análise estatística dos dados foi realizada no software RStudio. Resultados: Sete artigos foram selecionados resultando em 847 pacientes. Entre os tratados com AAD, a taxa de recorrência variou entre 11,1% e 42,1% e, no grupo controle, ocorreu em 5% a 65,6% dos pacientes. O risco relativo (RR) de recorrência do CHC no grupo de pacientes que recebeu AAD foi menor do que o risco evidenciado no grupo controle, apesar de não haver significância estatística (RR 0,71 95% IC [0,55;0,93] I2=38%, p=0,14). O tempo até o diagnóstico da recorrência teve uma média de 9,35 meses no grupo exposto a terapia e 13,42 meses no grupo controle. Conclusão: Sugere-se que a terapia com AAD não aumenta o risco de recorrência do CHC em comparação com grupos controle. Nos pacientes que desenvolveram recorrência, ocorreu com maior frequência dentro do primeiro ano após introdução dos AAD.
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- 2021
32. Differential expression analysis and profiling of hepatic miRNA and isomiRNA in dengue hemorrhagic fever
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Rommel Rodríguez Burbano, João Lídio da Silva Gonçalves Vianez Júnior, Taiana S Silveira, Jedson Ferreira Cardoso, Layanna Freitas de Oliveira, Amanda Araújo Serrão de Andrade, Caroline Aquino Moreira-Nunes, André Luiz Teles e Silva, Márcio Roberto Teixeira Nunes, Leda Viegas de Carvalho, Eduardo José Melo dos Santos, Janaina Mota de Vasconcelos, and Carla Pagliari
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0301 basic medicine ,Adult ,Male ,Science ,Vascular permeability ,Biology ,Dengue virus ,medicine.disease_cause ,Article ,Antivirais ,Proinflammatory cytokine ,Pathogenesis ,03 medical and health sciences ,Homeostase ,0302 clinical medicine ,Immune system ,Cyclin-dependent kinase ,microRNA ,medicine ,Humans ,Severe Dengue ,Aged ,Multidisciplinary ,Gene Expression Profiling ,V?rus da Dengue / patogenicidade ,virus diseases ,Dengue Virus ,Middle Aged ,F?gado / patologia ,MicroRNAs ,MicroRNAs / an?lise ,030104 developmental biology ,Viral replication ,Gene Expression Regulation ,Liver ,Dengue Grave ,Viral infection ,030220 oncology & carcinogenesis ,Immunology ,miRNAs ,biology.protein ,Medicine ,Female ,Pathogens - Abstract
Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Ananindeua, PA, Brasil / Universidade Federal do Par?. Instituto de Ci?ncias Biol?gicas. Bel?m, PA, Brazil. Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Ananindeua, PA, Brasil. Universidade de S?o Paulo. Departamento de Patologia. Faculdade de Medicina. S?o Paulo, SP, Brazil. Funda??o Oncocentro de S?o Paulo. S?o Paulo, SP, Brazil. Faculdade de Medicina de S?o Jos? Do Rio Preto. S?o Paulo, SP, Brazil. Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Ananindeua, PA, Brasil. Universidade Federal do Par?. Instituto de Ci?ncias Biol?gicas. Bel?m, PA, Brazil. Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Ananindeua, PA, Brasil. Universidade Federal Do Cear?. Drug Research and Development Center. Laboratory of Pharmacogenetics. Fortaleza, CE, Brazil. Universidade Federal do Par?. Instituto de Ci?ncias Biol?gicas. Bel?m, PA, Brazil. Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Ananindeua, PA, Brasil. Universidade Federal do Par?. Instituto de Ci?ncias Biol?gicas. Bel?m, PA, Brazil. Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Ananindeua, PA, Brasil. Dengue virus causes dengue hemorrhagic fever (DHF) and has been associated to fatal cases worldwide. The liver is one of the most important target tissues in severe cases, due to its intense viral replication and metabolic role. microRNAs role during infection is crucial to understand the regulatory mechanisms of DENV infection and can help in diagnostic and anti-viral therapies development. We sequenced the miRNome of six fatal cases and compared to five controls, to characterize the human microRNAs expression profile in the liver tissue during DHF. Eight microRNAs were differentially expressed, including miR-126-5p, a regulatory molecule of endothelial cells, miR-122-5p, a liver specific homeostasis regulator, and miR-146a-5p, an interferon-regulator. Enrichment analysis with predicted target genes of microRNAs revealed regulatory pathways of apoptosis, involving MAPK, RAS, CDK and FAS. Immune response pathways were related to NF- kB, CC and CX families, IL and TLR. This is the first description of the human microRNA and isomicroRNA profile in liver tissues from DHF cases. The results demonstrated the association of miR-126-5p, miR-122-5p and miR-146a-5p with DHF liver pathogenesis, involving endothelial repair and vascular permeability regulation, control of homeostasis and expression of inflammatory cytokines.
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- 2021
33. ‘Real-life’ experience with direct-acting antiviral agents for HCV after kidney transplant
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Fabrizi, Fabrizio, Alonso, Cristina, Palazzo, Ana, Anders, Margarita, Reggiardo, María Virginia, Cheinquer, Hugo, Zuain, María Grazia Videla, Figueroa, Sebastián, Mendizábal, Manuel, Silva, Marcelo Oscar, Ridruejo, Ezequiel, and Latin American Liver Research, Educational and Awareness Network (LALREAN)
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Antiviral agents ,Hepatite C ,Resposta viral sustentada ,Transplante de rim ,Chronic kidney disease ,Viral response ,Insuficiência renal crônica ,Kidney transplant ,Hepatitis C ,Antivirais - Abstract
Introductions and Objectives: The introduction of direct-acting antiviral (DAA) agents promises to change dramatically the management of hepatitis C in kidney transplant recipients, a patient group where the treatment of hepatitis C is historically challenging. The purpose of the current study was to assess (in a ‘real-life’ setting) the safety and efficacy of all-oral, interferon-free, direct-acting antiviral agents in kidney transplant recipients with HCV. Material and Methods: We performed a single-arm, multi-center study in a cohort (n = 95) of kidney transplant recipients who underwent antiviral therapy with DAAs. The primary end-point was sustained virologic response (SVR) (serum HCV RNA < 15 IU/mL, 12 weeks after treatment ended; SVR12). We recorded data on on-treatment adverse events (AEs), serious AEs, and laboratory abnormalities. Results: Various regimens were adopted at the discretion of the treating physician: elbasvir/grazoprevir (n = 11), paritaprevir/ritonavir/ombitasvir/dasabuvir (PrOD) regimens ± ribavirin (n = 23), and sofosbuvirbased regimens ± ribavirin (n = 61). The SVR12 rate was 93.7% (89/95) (95% CI, 88%; 98%), according to intention-to-treat analysis; three patients without viral response (n = 3) were found. Ribavirin was administered in 8 (8.4%) allograft recipients. The frequency of drop-outs was 4.2% (4/95) (95% CI, 0.2%; 8.2%); these were related to arthralgia/myalgia (n = 2), fatigue (n = 1), and lowered estimated glomerular filtration rate (eGFR) (n = 1). There were no differences with regard to serum creatinine and eGFR before and after antiviral therapy and during follow-up in the whole cohort. The patient who interrupted antiviral treatment due to raised serum creatinine was on sofosbuvir/daclatasvir regimen; one of the four dropouts obtained SVR. Conclusions: All-oral, interferon-free therapy with DAAs for chronic HCV after kidney transplantation was effective and well-tolerated in a ‘real–life’ clinical setting. Identical results have been observed in patients with intact kidneys or advanced chronic kidney disease. Careful evaluation of kidney function over follow-up in kidney transplant recipients who received DAAs regimens is recommended. Clinical trials aimed to assess whether sustained viral response translates into improved patient/graft survival are under way.
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- 2021
34. Estratégias de acompanhamento da terapia antiviral da hepatite C crônica por meio de ferramentas de telessaúde : ensaio clínico em saúde pública no Brasil
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Oliveira, Jerônimo de Conto and Álvares-da-Silva, Mário Reis
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Telehealth ,Hepatite C ,Telemedicina ,Direct-acting antivirals ,Hepatitis C ,Antivirais - Abstract
INTRODUÇÃO: O tratamento do vírus da hepatite C (HCV) teve grande progresso nos últimos anos com os antivirais de ação direta (DAAs), proporcionando maior eficácia na eliminação do vírus com baixo índice de efeitos adversos. Essas características possibilitaram a instituição do acesso universal à terapia antiviral no Brasil pelo Sistema Único de Saúde (SUS) a partir de 2018. Apesar dos avanços, ainda há limitação no acesso ao tratamento, como distância geográfica entre pacientes e centros especializados e o desequilíbrio entre oferta e demanda de consultas especializadas no âmbito do SUS. Estratégias de telessaúde têm potencial de melhorar o acesso a cuidados em saúde e tratamentos especializados. OBJETIVOS: Avaliar a eficácia e a aplicabilidade de uma estratégia de monitoramento mínimo e a distância do tratamento da hepatite C em pacientes oriundos da atenção primária do sistema público de saúde no Brasil. MÉTODOS: pacientes com hepatite C crônica não cirróticos, encaminhados para consulta especializada em Porto Alegre, sem uso prévio de DAAs, foram selecionados para um protocolo simplificado de tratamento com visita única e monitoramento mínimo da terapia antiviral. O tratamento antiviral foi fornecido pelo Ministério da Saúde. A atividade presencial consistia em reunião com até 15 pacientes para orientações sobre a doença seguidas de avaliação clínica individual, coleta de exames e entrega do tratamento antiviral pangenotípico (sofosbuvir/velpatasvir) para uso por 12 semanas. Os pacientes foram acompanhados a distância, sem consultas ou ligações telefônicas programadas, porém dispondo de canais de comunicação direta com a equipe do estudo durante o período de tratamento. Ao final do acompanhamento, foi realizada teleconsulta por chamada de vídeo no WhatsApp®. Foi coletada carga viral de forma descentralizada 12 semanas após o término do tratamento para avaliação da resposta virológica sustentada (RVS) e sua comparação aos dados históricos do tratamento da hepatite C com DAAs no país, com a hipótese de ser essa estratégia não inferior à taxa de RVS de 97% obtida na coorte histórica. RESULTADOS: Foram incluídos 144 pacientes, com média de idade de 52 anos, 45,8% mulheres e 84,7% com escore APRI
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- 2021
35. Eliminação de SARS-CoV-2 em nasofaringe e orofaringe após o uso de um protocolo adjuvante de gargarejo e bochecho com antisséptico bucal [Editorial]
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Santos, Paulo Sérgio da Silva
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ANTIVIRAIS - Published
- 2021
36. The SARS-CoV-2 Nsp3 macrodomain reverses PARP9/DTX3L-dependent ADP-ribosylation induced by interferon signalling
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Lari Lehtiö, Deborah Schechtman, Lilian C. Russo, Flavia Carla Meotti, Alexandre Bruni-Cardoso, Sven T. Sowa, Katie Dale, Nicolas C. Hoch, Rebeka Tomasin, Isaac Araújo Matos, Antonio Carlos Manucci, and Keith W. Caldecott
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Poly ADP ribose polymerase ,viruses ,Ubiquitin-Protein Ligases ,ANTIVIRAIS ,010402 general chemistry ,medicine.disease_cause ,01 natural sciences ,Biochemistry ,03 medical and health sciences ,ADP-Ribosylation ,Interferon ,medicine ,Humans ,Molecular Biology ,Research Articles ,030304 developmental biology ,Coronavirus ,0303 health sciences ,Chemistry ,Effector ,SARS-CoV-2 ,Interferon-stimulated gene ,COVID-19 ,Cell Biology ,3. Good health ,0104 chemical sciences ,Cell biology ,Neoplasm Proteins ,ADP-ribosylation ,COVID-19/SARS-CoV-2/ADP-ribosylation/PARP9/DTX3L/macrodomain ,Ectopic expression ,Interferons ,Signal transduction ,Poly(ADP-ribose) Polymerases ,medicine.drug ,Signal Transduction - Abstract
SARS-CoV-2 non-structural protein 3 (Nsp3) contains a macrodomain that is essential for coronavirus pathogenesis and is thus an attractive target for drug development. This macrodomain is thought to counteract the host interferon (IFN) response, an important antiviral signalling cascade, via the reversal of protein ADP-ribosylation, a post-translational modification catalysed by host poly(ADP-ribose) polymerases (PARPs). However, the main cellular targets of the coronavirus macrodomain that mediate this effect are currently unknown. Here, we use a robust immunofluorescence-based assay to show that activation of the IFN response induces ADP-ribosylation of host proteins and that ectopic expression of the SARS-CoV-2 Nsp3 macrodomain reverses this modification in human cells. We further demonstrate that this assay can be used to screen for on-target and cell-active macrodomain inhibitors. This IFN-induced ADP-ribosylation is dependent on PARP9 and its binding partner DTX3L, but surprisingly the expression of the Nsp3 macrodomain or the deletion of either PARP9 or DTX3L do not impair IFN signalling or the induction of IFN-responsive genes. Our results suggest that PARP9/DTX3L-dependent ADP-ribosylation is a downstream effector of the host IFN response and that the cellular function of the SARS-CoV-2 Nsp3 macrodomain is to hydrolyse this end product of IFN signalling, rather than to suppress the IFN response itself.
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- 2021
37. Descoberta de moléculas é chave para futuros medicamentos contra coronavírus. [Depoimento a Júlio Bernardes]
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Godoy, Andre Schutzer de
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ANTIVIRAIS - Published
- 2021
38. Depletion of TAX1BP1 amplifies innate immune responses during respiratory syncytial virus infection
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Marie Galloux, Lorène Gonnin, Delphyne Descamps, Jean-François Eléouët, Carole Drajac, Quentin Marquant, Vincent Pietralunga, Armando Morais Ventura, Frédéric Tangy, Andressa Peres de Oliveira, Pierre-Olivier Vidalain, Sarah Madrières, Hidekatsu Iha, Edwige Bouguyon, Jenna Fix, Virologie et Immunologie Moléculaires (VIM (UR 0892)), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Universidade de São Paulo (USP), Oita University Faculty of Medicine [Oita, Japon], Génomique virale et vaccination, Institut Pasteur [Paris]-Centre National de la Recherche Scientifique (CNRS), Centre International de Recherche en Infectiologie - UMR (CIRI), Institut National de la Santé et de la Recherche Médicale (INSERM)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), ANR-13-ISV3-0007,RESPISYNCYCELL,Partenaires cellulaires du virus respiratoire syncytial(2013), Universidade de São Paulo = University of São Paulo (USP), Institut Pasteur [Paris] (IP)-Centre National de la Recherche Scientifique (CNRS), Centre International de Recherche en Infectiologie (CIRI), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
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TAX1BP1 ,Viral protein ,viruses ,[SDV]Life Sciences [q-bio] ,Immunology ,ANTIVIRAIS ,Context (language use) ,Respiratory Syncytial Virus Infections ,Biology ,Virus Replication ,medicine.disease_cause ,Microbiology ,Virus ,Cell Line ,Mice ,03 medical and health sciences ,Immune system ,Cricetinae ,Virology ,medicine ,Animals ,Humans ,Pathogen ,Lung ,030304 developmental biology ,Nucleoprotein ,Mice, Knockout ,Innate immunity ,0303 health sciences ,Innate immune system ,030306 microbiology ,Intracellular Signaling Peptides and Proteins ,RSV ,Nucleocapsid Proteins ,Immunity, Innate ,Yeast two-hybrid screening ,Virus-Cell Interactions ,Neoplasm Proteins ,3. Good health ,medicine.anatomical_structure ,Viral replication ,Respiratory Syncytial Virus, Human ,Insect Science ,Interferons ,Respiratory tract - Abstract
Respiratory syncytial virus (RSV) is the main cause of acute respiratory infections in young children, and also has a major impact in the elderly and immunocompromised people. In the absence of vaccine or efficient treatment, a better understanding of RSV interactions with the host antiviral response during infection is needed. Previous studies revealed that cytoplasmic inclusion bodies (IBs) where viral replication and transcription occur could play a major role in the control of innate immunity during infection by recruiting cellular proteins involved in the host antiviral response. We recently showed that the morphogenesis of IBs relies on a liquid-liquid phase separation mechanism depending on the interaction between viral nucleoprotein (N) and phosphoprotein (P). These scaffold proteins are expected to play a central role in the recruitment of cellular proteins to IBs. Here, we performed a yeast two-hybrid screen using RSV N protein as a bait, and identified the cellular protein TAX1BP1 as a potential partner of N. This interaction was validated by pulldown and immunoprecipitation assays. We showed that TAX1BP1 suppression has only a limited impact on RSV infection in cell cultures. On the contrary, in vivo experiments showed that RSV replication is decreased in TAX1BP1KO mice, whereas the production of inflammatory and antiviral cytokines is enhanced. In vitro infection of either wild-type or TAX1BP1KO alveolar macrophages confirmed that the innate immune response to RSV infection is enhanced in the absence of TAX1BP1. Altogether, our results suggest that RSV could hijack TAX1BP1 to restrain the host immune response during infection.ImportanceRespiratory syncytial virus (RSV), which is the leading cause of lower respiratory tract illness in infants, still remains a medical problem in the absence of vaccine or efficient treatment. This virus is also recognized as a main pathogen in the elderly and immunocompromised people, and the occurrence of co-infections (with other respiratory viruses and bacteria) amplifies the risks of developing respiratory distress. In this context, a better understanding of the pathogenesis associated to viral respiratory infections, which depends on both viral replication and the host immune response, is needed. The present study reveals that the cellular protein TAX1BP1, which interacts with the RSV nucleoprotein N, participates in the control of the innate immune response during RSV infection, suggesting that N-TAX1BP1 interaction represents a new target for the development of antivirals.
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- 2021
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39. The crab heparin-like compound exhibits a strong inhibitory effect on infections by dengue virus-2
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Giulianna P.V. Andrade, Ana Alice de Aquino, Paula Renata Lima Machado, Lívia de Lourdes Pinto, Renato Ferreira de Almeida Júnior, Suely F. Chavante, Kleber Juvenal Silva Farias, and Marlyanne M. C. S. de Almeida
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Pharmacology ,C?lulas Vero / citologia ,Heparin like ,Chemistry ,education ,virus diseases ,Heparina / an?lise ,Dengue virus ,medicine.disease_cause ,Virology ,Antivirais ,Dengue / virologia ,Infectious Diseases ,medicine ,Inhibitory effect ,geographic locations ,Rea??o em Cadeia da Polimerase em Tempo Real / m?todos - Abstract
This study was supported by Federal University of Rio Grande do Norte. Federal University of Rio Grande do Norte - Campus Universit?rio. Department of Biochemistry. Natal, RN, Brazil. Federal University of Rio Grande do Norte. Postgraduate Program in Health Sciences. Natal, RN, Brazil. Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Programa de P?s-Gradua??o em Virologia. Ananindeua, PA, Brasil. Federal University of Rio Grande do Norte - Campus Universit?rio. Department of Biochemistry. Natal, RN, Brazil. Federal University of Rio Grande do Norte. Department of Clinical Analysis and Toxicology. Natal, RN, Brazil. Federal University of Rio Grande do Norte - Campus Universit?rio. Department of Biochemistry. Natal, RN, Brazil. Federal University of Campina Grande. Center of Education and Health. Cuit?, PB, Brazil. Federal University of Rio Grande do Norte - Campus Universit?rio. Department of Biochemistry. Natal, RN, Brazil. Background: According to the World Health Organization (WHO), two-fifths of the world population is at risk of infection by DENV. There are no safe and effective vaccines estab-lished. Sulfated glycosaminoglycans such as heparin, used as anticoagulants, inhibit the initial step of dengue viral replication. Recently, an isolated heparin analogue Goniopsis cruentata (cCTH) has presented a low anticoagulant effect with reduced bleeding risk. Methods: The antiviral activity of cCTH and heparin compounds against DENV-2 in Vero cell culture was determined by quantitative RT-PCR (qRT-PCR) and titration. For this, four trials were carried out: treatment of the cells for 2 h before viral inoculation, concomitant viral inoculation treatment, treatment after viral inoculation and virucidal assay. Subsequently, the culture superna-tants were collected for periods of 24, 48 and 72 h. Results: Our results demonstrated that cCTH and heparin showed antiviral activity against DENV-2. Conclusion: These data suggest that both compounds prevented viral replication in cultured Vero cells.
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- 2021
40. Superlaboratório Sirius ajuda a revelar detalhes inéditos da reprodução do vírus da Covid-19 [Depoimento]
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Trivella, Daniela
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ANTIVIRAIS - Published
- 2021
41. Efficacy and safety of glecaprevir/pibrentasvir in treatment-naïve adults with chronic hepatitis C virus genotypes 1–6 in Brazil
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Linda M Fredrick, Margaret Burroughs, Mario G. Pessoa, Adalgisa de Souza Paiva Ferreira, Maria P. J. S. Lima, Juvencio Furtado, Felipe Mazzoleni, Mário Reis Álvares-da-Silva, Mario Peribañez-Gonzalez, Lino Rodrigues, Márcia Guimarães Villanova, Tania Reuter, Hugo Cheinquer, Preethi Krishnan, Ecio Nascimento, Edison Roberto Parise, Giovanni Faria Silva, José Valdez Madruga, Hosp Dia, AbbVie Inc, Inst Infectol Campinas, Univ Fed Rio Grande do Sul, Universidade de São Paulo (USP), Univ Fed Maranhao, Hosp Ernesto Dornelles, Universidade Estadual Paulista (Unesp), and Outclin 5
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Adult ,Male ,medicine.medical_specialty ,Pyrrolidines ,Cirrhosis ,Genotype ,Sustained Virologic Response ,Specialties of internal medicine ,Hepacivirus ,Drug Administration Schedule ,Antivirais ,Glecaprevir and pibrentasvir ,03 medical and health sciences ,0302 clinical medicine ,Quinoxalines ,Internal medicine ,medicine ,Humans ,NS5A ,Adverse effect ,Aged ,Sulfonamides ,Hepatology ,business.industry ,Brasil ,General Medicine ,Hepatitis C ,Glecaprevir ,Hepatitis C, Chronic ,Middle Aged ,medicine.disease ,Confidence interval ,Pibrentasvir ,Discontinuation ,Drug Combinations ,Treatment Outcome ,Antiviral agents ,RC581-951 ,Hepatite C ,030220 oncology & carcinogenesis ,Liver cirrhosis ,Benzimidazoles ,Female ,030211 gastroenterology & hepatology ,business ,Brazil ,Cirrose hepática - Abstract
Made available in DSpace on 2021-06-25T15:08:07Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 AbbVie Introduction and objectives: Glecaprevir/pibrentasvir is a highly effective and well tolerated treatment for hepatitis C infection. Brazilian patients were not included in the original development studies for glecaprevir/pibrentasvir. This study aimed to assess safety and efficacy of glecaprevir/pibrentasvir in treatment-naive Brazilian adults without cirrhosis or with compensated cirrhosis. Patients and methods: EXPEDITION-3 was a Phase 3, open-label, multicenter study in treatment-naive Brazilian adults with hepatitis C infection genotype 1-6. Patients without cirrhosis (F2 or F3) or with compensated cirrhosis (F4) received 8 or 12 weeks of glecaprevir/pibrentasvir, respectively. The primary efficacy endpoint was the rate of sustained virologic response at post-treatment Week 12. Secondary endpoints were on-treatment virologic failure and relapse rates. Baseline polymorphisms were assessed in NS3 and NS5A. Adverse events and laboratory abnormalities were monitored. Results: 100 patients were enrolled, 75 received 8 weeks of treatment and 25 received 12 weeks; all patients completed treatment. Overall sustained virologic response at post-treatment Week 12 rate was high (98.0%; 98/100; 95% confidence interval: 93.0-99.4) and remained high regardless of baseline viral or host factors, including demographics, hepatitis C virus RNA levels, polymorphisms in NS3 and/or NS5A, genotype, and relevant comorbidities. 55% of patients reported >= 1 adverse event, the most common being headache (18.0%). Four patients reported serious adverse events; none were considered drug related or led to study drug discontinuation. No hepatic decompensations were observed. Conclusions: Glecaprevir/pibrentasvir was effective and well tolerated in treatment-nave Brazilian patients with hepatitis C infection without cirrhosis and with compensated cirrhosis. (C) 2020 Published by Elsevier Espafia, S.L.U. on behalf of Fundacion Clinica Medica Sur, A.C. This is an open access article under the CC BY-NC-ND license. Hosp Dia, Ave Dr Arnaldo,165, Sao Paulo, Brazil Ramiro Barcelos 2350,CPC Sala,21216, Porto Alegre, RS, Brazil AbbVie Inc, N Chicago, IL USA Inst Infectol Campinas, Rua Dr Quirino,524,Sala 72, Campinas, Brazil Univ Fed Rio Grande do Sul, Sch Med, GI Liver Div, Hosp Clin Porto Alegre, Porto Alegre, RS, Brazil Rua Santa Cruz,81, Sao Paulo, Brazil Rua Diogo Faria,816 Vila Clementino, Sao Paulo, Brazil Univ Sao Paulo, Sch Med, Div Gastroenterol & Hepatol, Ave Eneas Carvalho Aguiar,255 Bloco B 4 Andar, Sao Paulo, Brazil Rua Conego Xavier,276 Amb Infectol, Sao Paulo, Brazil Univ Sao Paulo, Fac Med Ribeirao Preto, Hosp Clin, Unidade Pesquisa Clin, Campus Univ S-N,Bloco G Subsolo 2, Ribeirao Preto, Brazil Univ Fed Maranhao, Clin Hosp Univ, Ctr Pesquisa, Rua Almirante Tamandare,01 Ctr, Sao Luis, Maranhao, Brazil Hosp Ernesto Dornelles, Ave Ipiranga 1801,7 Andar, Porto Alegre, RS, Brazil Ave Mandacaru,1590, Maringa, Parana, Brazil UNESP, Campus Botucatu,Rua Prof Dr Armanda Alves,S-N, Botucatu, SP, Brazil Outclin 5, Marechal Campos Ave 1355, Vitoria, ES, Brazil UNESP, Campus Botucatu,Rua Prof Dr Armanda Alves,S-N, Botucatu, SP, Brazil
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- 2021
42. Importância dos cuidados com a saúde oral em tempos de COVID-19 [Carta]
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Santos, Paulo Sérgio da Silva
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ANTIVIRAIS - Published
- 2021
43. O cuidado farmacêutico para pacientes com hepatite C em tratamento com antivirais de ação direta
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Pegoraro, Karem Aline and Campanha, Angela Maria
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Ciências da Saúde ,Hepatite C ,Assistência farmacêutica ,615.58 ,Farmácia ,Farmacoterapia ,Interações medicamentosas ,Antivirais - Abstract
Orientadora: Profa. Dra. Angela Maria Campanha. Dissertação (mestrado em Assistência Farmacêutica – PROFAR – Mestrado Profissional) - Universidade Estadual de Maringá, 2021 Introdução. A hepatite C pode resultar em cirrose hepática, carcinoma hepatocelular, transplantes hepáticos e óbitos. O desenvolvimento de novos agentes antivirais, denominados de Antivirais de Ação Direta (AADs) são promissores no tratamento da doença e exibem ótimos resultados na eliminação do vírus do organismo humano. Objetivo. O objetivo deste trabalho foi implantar e consolidar o cuidado farmacêutico aos pacientes em tratamento com AADs, para promover uma melhor adesão à terapia. Método. A seleção e coleta de dados dos pacientes infectados pelo vírus da hepatite C, e em tratamento com AADs, foram realizadas na Farmácia do Paraná da 20ª Regional de Saúde em Toledo. Foram obtidas as características sociodemográficas, clínicas, e sobre o uso de medicamentos. Foi realizado acompanhamento farmacoterapêutico para identificar e corrigir problemas relacionados à farmacoterapia, como reações adversas, interações medicamentosas, e adesão. Resultados. A amostra total deste estudo foi composta de 62 pacientes, com uma proporção maior de homens, com idade entre 40 a 69 anos, baixa escolaridade, e trabalhadores. Foram predominantes os genótipos 1 (45,2%) e 3 (48,4%) do vírus. Realizou-se 157 consultas farmacêuticas e foram identificados 122 problemas relacionados à farmacoterapia, dos quais 39,3% corresponderam à interações de medicamentos com AADs e destas, 45,1% eram interações potenciais ou com significado clínico. As classes de medicamentos com maior potencial de interação foram os aqueles com ação no sistema nervoso central, cardiovascular e trato alimentar e metabolismo. Eventos adversos corresponderam a 29,5% dos problemas relacionados à farmacoterapia encontrados. Os eventos adversos de maior ocorrência incluíram a cefaléia (14,6%), náuseas (9,8%), fadiga (8,1%) e dor epigástrica (8,1%). Foram realizadas 247 intervenções farmacêuticas, sendo as principais intervenções realizadas versaram sobre o aconselhamento ao paciente sobre tratamento específico. A adesão aos ADDS foi considerada alta (91,5%). Os fatores dificultadores para adesão identificados no estudo foram a faixa etária de 40 a 49 anos, presença de comorbidades (hipertensão, diabetes melittus e doenças psiquiátricas), baixa escolaridade, uso de substâncias lícitas/ilícitas e tempo de tratamento de 6 meses. Conclusão. O acompanhamento da equipe multidisciplinar, com a inclusão da clínica farmacêutica como etapa importante no processo de cuidado ao paciente possibilita a detecção e a prevenção de possíveis interações de medicamentos e reações adversas que possam interferir na ação do antiviral, bem como, contribui para a adesão e o entendimento do paciente acerca do objetivo do tratamento. Background. The hepatitis C may result in Liver Cirrhosis, Hepatocellular Carcinoma, liver transplantation and deaths. The development of new antivirals agents, named Direct-Acting Antivirals (DAAs) are promising in the treatment of the disease and exhibit excellent results in the elimination of the virus from the human body. Objective. The objective of this study was to implement and consolidate pharmaceutical care for patients receiving DAAs, to promote better adherence to therapy. Methods. The selection and data collect from patients infected by the hepatitis C virus in current treatment with direct-action antivirals were been done in the Parana’s Pharmacy, from 20ª Regional Health, a public pharmacy located in Toledo city, Paraná state, Brazil. The sociodemographic, clinical and medicines uses characteristics were obtained by the pharmaceutical appointment. Follow-up pharmacotherapeutic was carried out to identify and correct problems related to medicines as adverse drug events, drug-drug interactions and adherence. Results. A total 62 patients were enrolled, with a higher proportion of men, aged between 40 and 69 years, low schooling, and workers. Were predominant the HCV virus genotype 1 (45.2%) and 3 (48.4%). It has been realized 157 pharmaceutical appointments and 122 problems related to medicines were identified which 39.3% corresponded to drug-drug interactions with DAAs and these, 45.1% were potencial interactions or with clinical significance. The classes of drugs with the greatest potential for interaction were those with action on the central nervous system, cardiovascular and alimentary tract and metabolism. The most frequent adverse events included headache (14.6%), nausea (9.8%), fatigue (8.1%) and epigastric pain (8.1%).The main interventions were about counseling the patient about specific treatment. Mean adherence was high (91.5%). The complicating factors for adherence identified in the study were the age group of 40 to 49 years, presence of comorbidities (hypertension, diabetes mellitus and psychiatric diseases), low education, use of legal/illegal substances and treatment time of 6 months. Conclusion. The follow-up of the multidisciplinary team, with the inclusion of the pharmaceutical clinic as an important step in the patient care process enables the detection and prevention of possible drug interactions and adverse reactions that may interfere with the action of the antiviral as well as, it contributes to the patient's adherence and understanding of the treatment objective. [8] 54 f. : il. color. figs., tabs.
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- 2021
44. Natural prevalence of NS3 gene resistance-associated substitutions (RASs) in patients with chronic hepatitis C from the state of Para/Brazil
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Heloisa Marceliano Nunes, Pedro Eduardo Bonfim de Freitas, and Desirée Lopes da Silva
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Adult ,Male ,Simeprevir ,Cancer Research ,medicine.medical_treatment ,Hepatitis C virus ,Mutation, Missense ,Hepacivirus ,Viral Nonstructural Proteins ,Biology ,medicine.disease_cause ,Antiviral Agents ,Hepacivirus / gen?tica ,DNA sequencing ,Antivirais ,03 medical and health sciences ,Virology ,Drug Resistance, Viral ,medicine ,Humans ,Protease Inhibitors ,Prospective Studies ,Genetic variability ,Inibidores de Proteases ,Gene ,Aged ,030304 developmental biology ,0303 health sciences ,NS3 ,Protease ,030306 microbiology ,virus diseases ,Hepatitis C, Chronic ,Middle Aged ,Hepatite C Cr?nica / patologia ,Infectious Diseases ,Amino Acid Substitution ,Grazoprevir ,Resist?ncia a Medicamentos / gen?tica ,Female ,Brazil - Abstract
Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Ananindeua, PA, Brasil. Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Ananindeua, PA, Brasil. Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Ananindeua, PA, Brasil. The resistance of hepatitis C virus (HCV) to direct-acting antiviral agents, used in chronic hepatitis C treatment, consists of a natural process resulting from resistance-associated substitutions (RASs) at specific amino acid regions. To identify and establish the natural prevalence of RASs in the NS3 gene in patients with chronic hepatitis C in the state of Par?, northern Brazil. Molecular analysis was performed on a total of 35 patients infected with HCV genotype 1, who were treatment-naive to protease inhibitors. HCV RNA was extracted from plasma and the NS3 region was amplified and submitted to DNA sequencing (Sanger). The general natural prevalence of RASs in the NS3 gene was 37.5 % (Y56F and S122T). The substitutions Y56F (34.3 %), S122T (3.1 %), V132I (15.6 %) and V170I (9.3 %) were identified. Y56F and S122T provide resistance to the protease inhibitors grazoprevir and simeprevir, respectively. All amino acid substitutions in the NS3 gene, including RASs, identified in patients from the state of Par? were present in other Brazilian studies. The natural presence of RASs in this study reflects the elevated genetic variability of HCV.
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- 2021
45. Fármacos com potencial terapêutico para tratamento da COVID-19 / Drugs with therapeutic potential for COVID-19 treatment
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Augusto Poloniato Gelain, Luiz Carlos Kreutz, Luiz Casemiro Krzyzaniak Grando, and Luciano de Oliveira Siqueira
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Hidroxicloroquina ,Vacina BCG ,Corticosteroides ,General Medicine ,Cloroquina ,Infecções por Coronavirus ,Antivirais ,Antiparasitários ,Anticoagulantes - Abstract
Objetivos: analisar o potencial terapeutico de farmacos para o manejo da infeccao por SARS-CoV-2. Metodos: trata-se de uma revisao bibliografica realizada em base de dados a respeito dos farmacos utilizados para o manejo do SARS-CoV-2. Resultados: os anti-inflamatorios nao-esteroidais (AINES) nao mostraram evidencias positivas ou negativas, no entanto a administracao de corticosteroides mostrou potencial terapeutico promissor quando no estagio avancado da infeccao e em deficit respiratorio. A transfusao de plasma convalescente e o historico de imunizacao com BCG apresentaram-se promissores. Os anticoagulantes podem ser utilizados na tentativa de amenizar a coagulopatia induzida quando em caso de sepse e atividade inflamatoria exacerbada. Alguns antiparasitarios com efeito antiviral ja estabelecido mostraram-se sinergicos a outras classes farmacologicas. Ate o momento os dados cientificos mostram a tendencia de que os antivirais sao mais promissores para o tratamento da COVID-19 que as aminoquinolinas. Conclusao: nao ha evidencias cientificas definitivas para o uso de farmacos no tratamento da infeccao por SARS-CoV-2. Por outro lado, classes farmacologicas como corticoides, anticoagulantes, antiparasitarios e antivirais, demonstraram possiveis beneficios no tratamento da COVID-19. Tais resultados precisam ser melhores compreendidos a partir de novos estudos para entender sua real utilidade nos pacientes com SARS-CoV-2.
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- 2020
46. Remodeling of immunological biomarkers in patients with chronic hepatitis C treated with direct acting antiviral therapy
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Isabela Gomes Ribeiro, Rosângela Teixeira, Olindo Assis Martins Filho, Eduardo Garcia Vilela, Silvana Maria Elói Santos, Mariléia Chaves Andrade, and Mário Reis Álvares da Silva
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Terapêutica ,Tratamento ,Biomarcadores ,Hepatite C Crônica ,HCV ,Luminex ,DAAs ,Tempestade de biomarcadores ,Antivirais - Abstract
CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico Remodelação de biomarcadores imunológicos em pacientes com hepatite C crônica tratados com terapia antiviral de ação direta Antecedentes e objetivos: O tratamento do HCV com agentes antivirais de ação direta (DAAs) constitui oportunidade única para analisar as mudanças no sistema imunológico causadas pela rápida inibição da replicação viral. Portanto, esse estudo objetivou analisar a cinética dos biomarcadores séricos em pacientes com hepatite C crônica tratados com essas drogas. Métodos: Cinquenta pacientes com HCV foram incluídos nesta investigação longitudinal realizada antes (linha de base), durante (S2-4 e S8-12 semanas) e após o tratamento (S12-24 semanas) com sofosbuvir mais daclatasvir ± ribavirina (n = 36) ou simeprevir (n = 14). A distribuição dos genótipos de HCV 1a / b, 2 e 3 foi 80%, 6% e 14%, respectivamente. Todos os pacientes apresentaram RVS. Quinze doadores de sangue não infectados formaram o grupo controle (NI). Biomarcadores séricos CXCL8, CCL11, CCL3, CCL4, CCL2, CCL5, CXCL10, IL-1β, IL-6, TNF-α, IL-12, IFN-γ, IL-15, IL-17, IL-1Ra, IL- 4, IL-5, IL-9, IL-10, IL-13, FGFbásico, PDGF, VEGF, G-CSF, GM-CSF, IL-7 e IL-2 foram quantificados pela plataforma Luminex Bio-Plex Pro™. Utilizaram-se os testes de Mann-Whitney (HCV e NI), Kruskal Wallis (múltiplo) e Dunn (sequencial em pares) para comparações entre grupos. A significância foi p≤0,05. Análises estatísticas e artes gráficas utilizaram o software Prism Graph Pad 8.0. O estudo foi aprovado pelas instâncias éticas e institucionais da UFMG e FIOCRUZ / Minas e os participantes assinaram o termo de consentimento. Resultados: Observou-se ampla remodelação de biomarcadores em pacientes com HCV no início do estudo comparados aos NI, caracterizada por altos níveis de quimiocinas, citocinas pró-inflamatórias e fatores de crescimento, e pequeno aumento de citocinas regulatórias. A linha do tempo da cinética das alterações basais com DAAs revelou declínio precoce de CXCL8, CCL4, IL-6, IL-15, IL-17, IL-9, GM-CSF e IL-7 em S8-12 e remodelação tardia de CCL3, CCL2, CCL5, IL1β, TNF-α, IL-12, IFN- γ, IL1-Ra, IL-4, IL-10, IL-13, PDGF, VEGF, G-CSF em W12-24. ALT ≥69U/L, plaquetas ≤150.000/mm3 e cirrose hepática no prétratamento foram associados à remodelação tardia da resposta imune. Conclusões: A erradicação do HCV com DAAs resulta em reajuste notável do microambiente dos biomarcadores séricos da resposta imune, podendo ser mais lenta naqueles com cirrose compensada e ALT alta. Esses resultados acrescentam evidências ao conhecimento do processo de remodelação imunológica associado à rápida erradicação viral do HCV com as potentes drogas antivirais diretas atuais. Remodeling of immunological biomarkers in patients with chronic hepatitis C treated with direct acting antiviral therapy Background &Aims: The HCV treatment with direct-acting antiviral agents (DAAs) has offered a unique opportunity to analyze the changes in the immune system caused by the rapid inhibition of viral replication. We sought to analyze the kinetics profiles of serum biomarkers in patients with chronic hepatitis C upon DAAs treatment. Methods: Fifty HCV patients were enrolled in a longitudinal investigation carried out before (baseline), during (W2-4 and W8-12 weeks) and post-treatment (W12-24 weeks) with sofosbuvir plus daclatasvir ± ribavirin (n=36) or simeprevir (n=14). Distribution of HCV genotypes 1a/b, 2 and 3 was 80%, 6% and 14%, respectively. All patients had SVR. Fifteen uninfected blood donors formed the control group (NI). Serum biomarkers CXCL8, CCL11, CCL3, CCL4, CCL2, CCL5, CXCL10, IL-1β, IL-6, TNF-α, IL-12, IFN-γ, IL-15, IL-17, IL1Ra, IL-4, IL-5, IL-9, IL-10, IL-13, FGF-basic, PDGF, VEGF, G-CSF, GM-CSF, IL-7 e IL-2 were quantified by Luminex Bio-Plex Pro™ platform. Mann-Whitney (HCV and NI), Kruskal Wallis (multiple), and Dunn (sequential in pairs) tests were used for comparisons between groups. The significance considered was p≤0.05. The Prism Graph Pad 8.0 software was used for statistical analysis and graphic arts. The study was approved by the institutional and ethical boards of UFMG and FIOCRUZ/Minas. All participants signed the consent form. Results: The results demonstrated a clear biomarker remodeling in HCV patients at baseline as compared to NI, characterized by high levels of chemokines, pro-inflammatory cytokines, and growth factors, with minor increase of regulatory cytokines. The kinetics timeline of baseline fold changes upon DAAs treatment revealed an early decline of CXCL8, CCL4, IL6, IL-15, IL-17, IL-9, GM-CSF and IL-7 at W8-12 and a late remodeling of CCL3, CCL2, CCL5, IL1β, TNF-α, IL-12, IFN- γ, IL1-Ra, IL-4, IL-10, IL-13, PDGF, VEGF, G-CSF at W1224. ALT ≥69U/L, platelet ≤150,000/mm3 and liver cirrhosis at baseline were factors related to delayed immune response remodeling. Conclusions: The HCV eradication with DAAs results in a profound readjustment of the microenvironment of serum biomarkers of the immune response, which is notable in patients with chronic hepatitis C, and may be slower in those with compensated cirrhosis and high ALT levels. These results add evidence to the knowledge of the process of immune remodeling associated with the rapid viral eradication of HCV with the current potent antiviral drugs.
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- 2020
47. Terapias antivirais anti-HCV como alternativa para tratamento da Covid-19
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Medeiros, Giuliene Rocha de, Farias , Isabela Cristina Cordeiro, Farias, João Victor Cordeiro, and Macedo, Penelopy Rodrigues de
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Tratamiento ,Vírus da hepatite c ,Sars-cov-2 ,Antivírico ,Antiviral ,Hepatitis c virus ,Treatment ,Virus de la hepatitis c ,Antivirais ,Tratamento - Abstract
The current pandemic caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has spread alarmingly around the world at a significantly faster speed than previous coronaviral outbreaks. Due to the lack of a vaccine at the moment, an early antiviral intervention can prevent the spread of the disease worldwide and improve the clinical results of infected patients. The SARS-CoV-2 virus and the Hepatitis C virus (HCV) have a similar structure, replication, and catalytic mechanisms, therefore, several studies have considered the potential for antiviral activity of anti-HCV drugs such as remdesivir, simeprevir, sofosbuvir, and daclatasvir against SARS-CoV-2. Therefore, the present study aims to evaluate and discuss the antivirals already available against HCV, which have also been shown to be potential inhibitors of SARS-CoV-2 replication. The study was based on a literature review, of a qualitative nature and an exploratory type. Studies with anti-HCV drugs are promising and are already considered to start clinical trials in patients infected with the new coronavirus, having been observed as inhibitors of SARS-CoV-2 viral replication. Thus, the present study brings a pharmaco-clinical review on antivirals remdesivir, simeprevir, sofosbuvir, and daclatasvir, considering the main studies carried out to date in the treatment for Covid-19. La pandemia actual causada por el síndrome respiratorio aguda severo coronavirus 2 (SARS-CoV-2) se ha extendido de manera alarmante por todo el mundo a una velocidad significativamente más rápida que los brotes anteriores de coronavirus. Debido a la falta de una vacuna en este momento, una intervención antiviral temprana puede prevenir la propagación de la enfermedad en todo el mundo y mejorar los resultados clínicos de los pacientes infectados. El virus SARS-CoV-2 y el virus de la hepatitis C (VHC) tienen una estructura, replicación y mecanismos catalíticos similares, por lo tanto, varios estudios han considerado el potencial de actividad antiviral de medicamentos anti-VHC como remdesivir, simeprevir, sofosbuvir, y daclatasvir contra el SARS-CoV-2. Por lo tanto, el presente estudio tiene como objetivo evaluar y discutir los antivirales ya disponibles contra el VHC, que también han demostrado ser inhibidores potenciales de la replicación del SARS-CoV-2. El estudio se basó en una revisión de la literatura, de carácter cualitativo y de tipo exploratorio. Los estudios con fármacos anti-VHC son prometedores y ya se considera que inicien ensayos clínicos en pacientes infectados con el nuevo coronavirus, habiéndose observado como inhibidores de la replicación viral del SARS-CoV-2. Así, el presente estudio trae una revisión farmacoclínica sobre los antivirales remdesivir, simeprevir, sofosbuvir y daclatasvir, considerando los principales estudios realizados hasta la fecha en el tratamiento de Covid-19. A atual pandemia causada pelo vírus da síndrome respiratória aguda grave 2 (SARS-CoV-2) se propagou mundialmente de forma alarmante em uma velocidade significativamente mais rápida do que os surtos anteriores causados por coronaviroses. Devido à falta de uma vacina no momento, uma precoce intervenção antiviral pode impedir a propagação da doença em todo o mundo e melhorar os resultados clínicos dos pacientes infectados. O vírus SARS-CoV-2 e o vírus da Hepatite C (HCV) possuem estrutura, replicação e mecanismos catalíticos semelhantes, portanto, vários estudos consideraram o potencial de atividade antiviral de medicamentos anti-HCV como o remdesivir, simeprevir, sofosbuvir e daclatasvir contra SARS-CoV-2. Diante disso, o presente trabalho, tem como objetivo avaliar e discutir sobre os antivirais já disponíveis contra o HCV que também demonstraram ser potenciais inibidores da replicação do SARS-CoV-2. O estudo baseou-se em uma revisão bibliográfica, de natureza qualitativa e, do tipo exploratório. Os estudos com medicamentos anti-HCV são promissores e já são considerados para iniciar ensaios clínicos em pacientes infectados com o novo coronavírus, tendo sido observados como inibidores da replicação viral do SARS-CoV-2. Assim, o presente estudo traz uma revisão farmaco-clínica sobre os antivirais remdesivir, simeprevir, sofosbuvir e daclatasvir, considerando os principais estudos realizados até o momento no tratamento para Covid-19.
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- 2020
48. A cura da hepatite C crônica com os novos antivirais de ação direta não resultou em melhora da resistência insulínica a curto prazo
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Lohanna Strauhs-Nitsch, Alcindo Pissaia Junior, Claudia Alexandre Pontes Ivantes, Daphne Benatti Gonçalves Morsoletto, and Marcela Ferro Campiolo
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0301 basic medicine ,Male ,medicine.medical_specialty ,medicine.medical_treatment ,Resistência à insulina ,RC799-869 ,Hepacivirus ,Gastroenterology ,Antiviral Agents ,Antivirais ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Insulin resistance ,Diabetes mellitus ,Internal medicine ,Ribavirin ,medicine ,Humans ,Hepatitis ,business.industry ,Insulin ,Hepatitis C ,Diseases of the digestive system. Gastroenterology ,Hepatitis C, Chronic ,Middle Aged ,medicine.disease ,030104 developmental biology ,Treatment Outcome ,Antiviral agents ,chemistry ,Hepatite C ,Homeostatic model assessment ,030211 gastroenterology & hepatology ,Female ,Glycated hemoglobin ,Insulin Resistance ,business ,Body mass index ,Brazil - Abstract
BACKGROUND: Chronic hepatitis C still figures as an important cause of morbidity among the Brazilian population, and is closely associated with metabolic disturbances, including insulin resistance (IR), which can be evaluated by the Homeostatic Model Assessment (HOMA-IR). IR may entail lower sustained virologic response (SVR) on certain therapeutic regimens and faster progression to advanced hepatic fibrosis. With the arrival of the direct acting agents (DAA) in hepatitis C treatment, there is an increased need in observing the impact in patients’ IR profile while using such therapies. OBJECTIVE: - 1) To compare the results of HOMA-IR in patients affected by chronic hepatitis C before treatment with DAA and 12 months after finishing it with SVR. 2) To evaluate the evolution of weight after curing chronic hepatitis C. METHODS: We included patients older than 18 from two tertiary care in Curitiba - PR, of both sexes, with chronic hepatitis C, treated with DAA, from July 2015 to September 2017. We also evaluated the patients’ levels of fasting insulin, fasting glucose and glycated hemoglobin before starting treatment and 12 months after finishing it. We also used epidemiologic data, such as age, sex, hepatic fibrosis degree, body mass index, abdominal circumference, viral genotype and the presence of diabetes mellitus before and after treatment. IR was assessed before and after treatment and calculated by the HOMA-IR score. Insulin resistance was defined by a HOMA-IR greater than 2.5. We excluded patients who lost follow-up, those who did not achieve SRV and those who did not have a laboratory profile. The results of quantitative variables were described by means, medians, and standard deviations. P values
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- 2020
49. Fosfolipase A2 isolada da serpente Crotalus durissus terrificus inibe o vírus chikungunya in vitro
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Igor de Andrade Santos, Jardim, Ana Carolina Gomes, José, Diego Pandeló, and Corbi, Pedro Paulo
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CIENCIAS BIOLOGICAS::MICROBIOLOGIA [CNPQ] ,Chikungunya ,Compostos naturais ,Arboviroses ,Antivirais - Abstract
CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico O vírus Chikungunya (CHIKV) é o agente etiológico da febre de Chikungunya, uma doença transmitida globalmente através de mosquitos do gênero Aedes sp. Até o momento, não há tratamento antiviral ou vacina aprovados contra o CHIKV, sendo mandatório o desenvolvimento de novas estratégias terapêuticas. Nesse contexto, as proteínas isoladas dos venenos de serpentes têm demonstrado atividade antiviral contra diversos vírus, incluindo arboviroses relevantes para o sistema público de saúde. A fosfolipase A2CB (PLA2CB), uma proteína isolada da peçonha de Crotalus durissus terrificus, demonstrou possuir atividades anti-inflamatórias, antiparasitárias, antibacterianas e antivirais. Neste estudo, nós investigamos os vários efeitos da PLA2CB no ciclo replicativo do CHIKV in vitro. A atividade antiviral da PLA2CB foi avaliada usando CHIKV-nanoluciferase, uma construção viral inserida de um gene repórter (-nanoluc), para infectar células de rim de hamster bebê (BHK-21) e avaliar a viabilidade celular (ensaio MTT) e as taxas de infectividade (níveis de luminescência). Os resultados demostraram que a PLA2CB possui uma potente atividade antiviral, avaliada pelo índice de seletividade de 128 (razão de citotoxicidade por atividade antiviral). Identificamos que o tratamento com PLA2CB protegeu as células contra a infecção pelo CHIKV em 84%, e reduziu significativamente a entrada do vírus nas células hospedeiras por um efeito virucida maior que 99%, ou reduzindo a adsorção e desnudamento em 98 e 95%, respectivamente. Adicionalmente, a PLA2CB apresentou um efeito moderado, porém significante, inibindo 64% das etapas pós-entrada do ciclo replicativo do CHIKV. Cálculos envolvendo ancoramento molecular foram realizados, e os resultados sugerem interações entre PLA2CB e as glicoproteínas do CHIKV, principalmente com a E1, por meio de interações hidrofóbicas. Adicionalmente, análises de espectroscopia no infravermelho indicou interações da PLA2CB com glicoproteínas do CHIKV, corroborando com os dados das análises in silico. Nossos dados demonstraram os múltiplos efeitos antivirais da PLA2CB no ciclo replicativo do CHIKV, e sugerem as interações da PLA2CB com glicoproteínas do CHIKV como um modo de ação desse composto bloqueando a entrada do vírus nas células hospedeiras. Chikungunya virus (CHIKV) is the etiologic agent of Chikungunya fever, a globally spreading mosquito-borne disease. To date, there is no approved antiviral treatment or vaccine against CHIKV, being mandatory the development of new therapeutic strategies. In this context, proteins isolated from snake venoms have demonstrated antiviral activity against several virus, including arbovirus which are relevant the public health system. The phospholipase A2CB (PLA2CB), a protein isolated from the venom of Crotalus durissus terrificus, demonstrated to possess anti-inflammatory, antiparasitic, antibacterial, and antiviral activities. In this study, we investigated the multiple effects of PLA2CB on the CHIKV replicative cycle in vitro. The antiviral activity of PLA2CB was assessed using CHIKV-nanoluciferase, a viral construct inserted of a reporter gene (-nanoluc), to infect baby hamster kidney cells (BHK-21) cells and evaluate cell viability (MTT assay) and infectivity rates (luminescence levels). The results demonstrated that PLA2CB possess a strong antiviral activity judged by the selective index of 128 (ratio of cytotoxicity to antiviral activity). We identified that the treatment with PLA2CB protected the cells against CHIKV infection in 84% and strongly impaired virus entry to the host cells by a virucidal effect of over 99%, or by reducing adsorption and uncoating in 98 and 95 %, respectively. Moreover, PLA2CB presented a modest yet significant activity inhibiting 64 % of post-entry stages of CHIKV replicative cycle. Molecular docking calculations were performed and results suggested binding interactions between PLA2CB and CHIKV glycoprotein, mainly with E1 through hydrophobic interactions. In addition, infrared spectroscopy spectral analysis indicated interactions of PLA2CB and CHIKV glycoproteins, corroborating with data from in silico analyzes. Our data demonstrated the multiple antiviral effects of PLA2CB on the CHIKV replicative cycle, and suggest the interactions of PLA2CB with CHIKV glycoproteins as a mode of action of this compound on blocking virus entry to the host cells. Dissertação (Mestrado) 2022-07-24
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- 2020
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50. Uso da nitazoxanida como uma alternativa de tratamento promissor do coronavírus COVID-19: uma revisão de literatura / Use of nitazoxanide as a promising alternative treatment for coronavirus COVID-19: a literature review
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Ponte, Yohana de Oliveira, Vasconcelos, Amanda de Albuquerque, Girão, Daniela Cavalcante, Costa, Cláudia Alencar Henrique da, and Rodrigues, Italo Sarto Carvalho
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Pandemias ,Infecções por Coronavirus ,Antivirais - Abstract
O objetivo deste trabalho é realizar uma revisão de literatura sobre o uso da nitazoxanida como uma alternativa de tratamento promissor para o coronavírus. Foi realizada uma busca no período de 20/04/2020 a 29/04/2020, na base de dados PubMed, utilizando-se os descritores “nitazoxanide” e “coronavírus”, combinados pelo operador boleano “AND”. Foram encontrados 07 estudos, dos quais após uma leitura minuciosa de títulos e resumos selecionaram-se 03. Entre os estudos realizados a nitazoxanida apresenta-se com um grande potencial antiviral para o tratamento de gripes e outras infecções respiratórias virais, além disso, ainda é reduzido o número de estudos laboratoriais e clinicos randomizados sobre esse medicamento. São necessários estudos laboratoriais e clínicos, sobretudo com ênfase na relação desta droga com a COVID-19, para compreender o mecanismo de ação da nitazoxanida e afirmar ou negar a sua possível contribuição para o tratamento dessa doença.
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- 2020
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