6 results on '"Tatiana Aparecida Pereira"'
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2. Three years pilot of spinal muscular atrophy newborn screening turned into official program in Southern Belgium
- Author
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Jacques Lombet, Joseph Dewulf, Arabelle Willems, Laura Blasco-Pérez, Mickaël Hiligsmann, Bénédicte Mast, Rudolf van Olden, Samantha di Fiore, Sofie Huybrechts, Lucia Lopez-Granados, Jean-Hubert Caberg, Tatiana Aparecida Pereira, Nicolas Deconinck, Tamara Dangouloff, Sarvnaz Shalchian-Tehran, Vincent Bours, Sandrine Marie, Véronique van Assche, Eduardo F. Tizzano, François Boemer, Vinciane Dideberg, Laurent Servais, Pablo Beckers, A. Daron, Lionel Marcelis, RS: CAPHRI - R2 - Creating Value-Based Health Care, Health Services Research, Institut Català de la Salut, [Boemer F, Beckers P, di Fiore S] Biochemical Genetics Laboratory, Human Genetics, CHU Sart Tilman, University of Liège, B35, 4000 Liège, Belgium. [Caberg JH, Dideberg V] Molecular Genetics Lab, Department of Human Genetics, CHU of Liège, University of Liège, Liège, Belgium. [Bours V] Department of Human Genetics, CHU of Liège, University of Liège, Liège, Belgium. [Blasco-Perez L, Tizzano E] Servei de Genètica Clínica i Molecular, Vall d’Hebron Hospital Universitari, Barcelona, Spain, Vall d'Hebron Barcelona Hospital Campus, UCL - SSS/DDUV - Institut de Duve, and UCL - (SLuc) Service de biochimie médicale
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Pediatrics ,medicine.medical_specialty ,National Health Programs ,Science ,Diagnosis::Diagnostic Techniques and Procedures::Clinical Laboratory Techniques::Neonatal Screening [ANALYTICAL, DIAGNOSTIC AND THERAPEUTIC TECHNIQUES, AND EQUIPMENT] ,SMN1 ,Article ,Workflow ,Muscular Atrophy, Spinal ,Food and drug administration ,Health Services Administration::Quality of Health Care::Outcome and Process Assessment (Health Care) [HEALTH CARE] ,Population screening ,Neonatal Screening ,Belgium ,Phénomènes atmosphériques ,Outcome Assessment, Health Care ,medicine ,Cribatge (Medicina) ,Humans ,Pilot program ,Infants nadons ,Genetic Predisposition to Disease ,Public Health Surveillance ,Motor neuron disease ,Referral and Consultation ,Otros calificadores::/terapia [Otros calificadores] ,diagnóstico::técnicas y procedimientos diagnósticos::técnicas de laboratorio clínico::cribado neonatal [TÉCNICAS Y EQUIPOS ANALÍTICOS, DIAGNÓSTICOS Y TERAPÉUTICOS] ,Newborn screening ,Multidisciplinary ,business.industry ,Incidence ,Infant, Newborn ,Disease Management ,enfermedades del sistema nervioso::enfermedades del sistema nervioso central::enfermedades de la médula espinal::atrofia muscular espinal [ENFERMEDADES] ,Spinal muscular atrophy ,Atròfia muscular espinal - Tractament ,Other subheadings::/therapy [Other subheadings] ,medicine.disease ,SMA ,Medicine ,Nervous System Diseases::Central Nervous System Diseases::Spinal Cord Diseases::Muscular Atrophy, Spinal [DISEASES] ,Disease Susceptibility ,business ,administración de los servicios de salud::calidad de la atención sanitaria::evaluación de resultados y procesos (atención a la salud) [ATENCIÓN DE SALUD] - Abstract
Three new therapies for spinal muscular atrophy (SMA) have been approved by the United States Food and Drug Administration and the European Medicines Agency since 2016. Although these new therapies improve the quality of life of patients who are symptomatic at first treatment, administration before the onset of symptoms is significantly more effective. As a consequence, newborn screening programs have been initiated in several countries. In 2018, we launched a 3-year pilot program to screen newborns for SMA in the Belgian region of Liège. This program was rapidly expanding to all of Southern Belgium, a region of approximately 55,000 births annually. During the pilot program, 136,339 neonates were tested for deletion of exon 7 of SMN1, the most common cause of SMA. Nine SMA cases with homozygous deletion were identified through this screen. Another patient was identified after presenting with symptoms and was shown to be heterozygous for the SMN1 exon 7 deletion and a point mutation on the opposite allele. These ten patients were treated. The pilot program has now successfully transitioned into the official neonatal screening program in Southern Belgium. The lessons learned during implementation of this pilot program are reported., SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 2021
3. Hydrogel increases localized transport regions and skin permeability during low frequency ultrasound treatment
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Renata Fonseca Vianna Lopez, Tatiana Aparecida Pereira, and Danielle N. Ramos
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medicine.medical_specialty ,Swine ,Sodium ,Skin Absorption ,chemistry.chemical_element ,02 engineering and technology ,030226 pharmacology & pharmacy ,Article ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,medicine ,Stratum corneum ,Zeta potential ,polycyclic compounds ,Animals ,Skin ,Multidisciplinary ,integumentary system ,ANTINEOPLÁSICOS ,Chemistry ,technology, industry, and agriculture ,Hydrogels ,Permeation ,021001 nanoscience & nanotechnology ,Fluoresceins ,Surgery ,Calcein ,Coupling (electronics) ,medicine.anatomical_structure ,Ultrasonic Waves ,Doxorubicin ,Self-healing hydrogels ,Biophysics ,Epidermis ,0210 nano-technology - Abstract
Low frequency ultrasound (LFU) enhances skin permeability via the formation of heterogeneous localized transport regions (LTRs). In this work, hydrogels with different zeta potentials were used as the coupling medium for LFU to investigate their contribution to LTR patterns and to the skin penetration of two model drugs, calcein and doxorubicin (DOX). When hydrogels were used, LTRs covering at least a 3-fold greater skin area were observed compared to those resulting from traditional LFU treatment and sodium lauryl sulfate. More LTRs resulted in an enhancement of calcein skin permeation. The zeta potential of the hydrogels affected the skin penetration of the positively charged DOX; the cationic coupling medium decreased the DOX recovered from the viable epidermis by 2.8-fold, whereas the anionic coupling medium increased the DOX accumulation in the stratum corneum by 4.4-fold. Therefore, LFU/hydrogel treatment increases LTRs areas and can target ionized drugs to specific skin layers depending on the zeta potential of the coupling medium.
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- 2017
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4. Influence of low frequency ultrasound associated with hydrogels on the skin permeability and in topical skin cancer treatment
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Tatiana Aparecida Pereira, Renata Fonseca Vianna Lopez, Antonio Adilton Oliveira Carneiro, Leila Aparecida Chiavacci Favorin, and Juliana Maldonado Marchetti
- Abstract
O câncer de pele é uma doença com grande incidência mundial. O tratamento tópico do câncer de pele é uma estratégia desejada uma vez que pode diminuir os efeitos adversos graves causados pelo tratamento cirúrgico e quimioterapia sistêmica. No entanto, os tratamentos tópicos atuais são limitados pela baixa efetividade das formulações em carrear o fármaco até as camadas mais profundas da pele. Desta forma, o ultrassom de baixa frequência (LFU) apresenta-se como um método atrativo, mas ainda pouco estudado, para aumentar a permeabilidade da pele. Portanto, o objetivo desse trabalho foi estudar modificações na composição dos meios de acoplamento do LFU visando aumentar as regiões de transporte localizadas (LTRs) da pele e a permeabilidade do quimioterápico doxorrubicina (DOX) para o tratamento tópico do câncer de pele. Para isso, um hidrogel de Poloxamer (nanogel) enriquecido com nanopartículas lipídicas sólidas (NLS) contendo DOX foi preparado e caracterizado; diferentes meios de acoplamento, dentre eles os tradicionais, contendo tensoativo, e os inovadores, contendo as NLS ou hidrogéis com diferentes potenciais zeta e viscosidades semelhantes, foram avaliados associados ao LFU para verificar sua influência na formação das LTRs e penetração cutânea de dois fármacos, calceína e DOX; a penetração cutânea da DOX livre e encapsulada em NLS foi quantificada nas diferentes camadas da pele pré-tratada com LFU; e, finalmente, o pré-tratamento mais promissor, LFU associado ao nanogel, seguido da aplicação passiva da DOX incorporada no nanogel foi avaliada in vivo em tumores cutâneos induzidos em camundongos imunossuprimidos. As NLS apresentaram tamanho e PdI de aproximadamente 200 nm e 0,3 respectivamente, com alto potencial zeta catiônico e pH de 3. A incorporação das NLS no nanogel não alterou o tamanho e PdI, no entanto, diminuiu o potencial zeta da formulação e elevou o pH para 5,5. Verificou-se por difração de raios X a baixo ângulo que as NLS continham fases cristalinas lamelares, enquanto o nanogel, fases cristalinas cúbicas, que foram mantidas quando as formulações foram associadas. O uso das NLS e dos hidrogéis, incluindo o nanogel, como meio de acoplamento do LFU modificou consideravelmente a distribuição e número de LTRs na pele em relação aos meios tradicionais. Tanto o número de LTRs quanto a sua distribuição parecem estar relacionados à tensão interfacial e a viscosidade do meio hidrofílico, sendo que a maior viscosidade dos géis gerou maior área de LTRs. O uso do nanogel originou LTRs em 50% da área da pele tratada, área esta 24 vezes maior do que a área de LTRs formada quando o meio de acoplamento convencional, com lauril sulfato de sódio, foi utilizado. Observou-se que a influência das LTRs na penetração de fármacos aniônicos (calceína) e catiônicos (DOX) depende do potencial zeta do hidrogel usado como meio de acoplamento e da dissociação do fármaco. Desta forma, a permeação cutânea da calceína foi menor quando gel aniônico foi utilizado como meio de acoplamento e o inverso ocorreu para a DOX. A penetração da DOX através do estrato córneo da pele pré-tratada com LFU/nanogel aumentou mais de 4 vezes, mas a encapsulação da DOX nas NLS dificultou a passagem da DOX para as camadas mais profundas da pele após o pré-tratamento da mesma com LFU, sugerindo um recuperação da pele desestruturada pelas partículas lipídicas administradas após o pré-tratamento. Nos estudos in vivo, o pré-tratamento da pele com LFU/nanogel seguido da aplicação diárias do nanogel contendo DOX resultou em diminuição de 6 vezes do volume do tumor após 21 dias de tratamento e apenas 5 aplicações do LFU/nanogel. No entanto, a diminuição do volume do tumor só ocorreu quando a sonda do LFU foi posicionada a 10 mm da superfície do tumor. O posicionamento da sonda a uma distância mais próxima do tumor (5 mm) não diminuiu o tamanho do tumor. Conclui-se que a aplicação de LFU com hidrogéis como meio de acoplamento é uma alternativa simples e efetiva para aumentar a penetração de fármacos na pele. Esta penetração pode ser modulada em função do potencial zeta do meio de acoplamento e da posição da sonda do ultrassom em relação à superfície do tumor. Desta forma, o tratamento tópico do câncer de pele usando LFU/nanogel como pré-tratamento é uma estratégia promissora para o tratamento tópico do câncer de pele. Skin cancer is a disease with high worldwide incidence. Topical treatment of skin cancer is a desired strategy since it can reduce the serious adverse effects caused by surgery and systemic chemotherapy. However, current topical treatments are limited by low effectiveness of the formulations delivery drug to the deeper layers of the skin. Thus, the low frequency ultrasound (LFU) presents itself as an attractive method, but still little studied, to increase skin permeability. Therefore, the objective of this work was to study changes in the LFU coupling medium composition to increase the transport localized region (LTRs) in the skin and the permeability of chemotherapeutic doxorubicin (DOX) for the topical skin cancer treatment. For this, a Poloxamer hydrogel (nanogel) supplemented with solid lipid nanoparticles (SLN) containing DOX was prepared and characterized; different coupling medium, including traditional, containing surfactant, and innovative, containing the NLS or hydrogels with different viscosities and zeta potential similar, were evaluated associated with the LFU to verify its influence in LTRs formation and skin penetration of two drugs, calcein and DOX; skin penetration of free and encapsulated DOX was quantified in the different layers of the LFU pretreated skin; and finally, the most promising pretreatment, LFU associated with nanogel, followed by the passive application of DOX incorporated into the nanogel was evaluated in vivo, in skin tumors induced in immunosuppressed mice. The NLS showed size and PDI of approximately 200 nm and 0.3, respectively, with high cationic zeta potential and pH 3 value. The incorporation of the NLS into the nanogel did not change the size and PDI, however, decreased the zeta potential of the formulation and increased pH value to 5.5. It was found by low angle X-ray diffraction that NLS-containing lamellar crystalline phase while the nanogel, cubic crystalline phases, which were maintained when the formulations were associated. The use of NLS and hydrogels, including nanogel, as coupling medium of LFU substantially modify the distribution and number of the LTRs in the skin compared to traditional medium. Both, LTRs number and distribution may be related to the interfacial tension and viscosity of the hydrophilic medium, hydrogel with higher viscosity produced greater LTRs area. The use of nanogel as coupling medium resulted in LTRs formation in 50% of treated skin area, this area is 24 times larger than the LTR area LTRs formed when conventional coupling medium sodium lauryl sulfate was used. It was observed that the influence of the LTRs in the penetration of anionic drugs (calcein) and cationic (DOX) depends on the zeta potential of the hydrogel used as coupling medium and drug. Thus, the permeation of calcein was lower when anionic gel was used as the coupling medium and the opposite occurred for DOX. DOX penetration through the stratum corneum of the skin pretreated with LFU / nanogel increased more than 4 times but the encapsulation of DOX in the NLS difficult the passage of DOX to the deeper layers of the skin after pre-treatment with LFU, suggesting the recovery of the skin by lipid particles administered after pretreatment. In the in vivo study, pretreatment of the skin with LFU / nanogel followed by the daily application of nanogel containing DOX resulted in a 6-fold decrease in tumor volume after 21 days of treatment with only 5 applications LFU / nanogel. However, the reduction of tumor volume occurred only when the LFU probe was positioned 10 mm from the tumor surface. The positioning of the probe at distance closer tumor (5 mm) has not decreased tumor size. It is concluded that the application of coupling medium hydrogels with LFU is a simple and effective alternative to enhance drug penetration into the skin. This penetration can be adjusted depending on the zeta potential of the coupling means and ultrasound probe position on the tumor surface. Therefore, topical treatment of skin cancer using LFU / nanogel as pre-treatment is a promising strategy for the topical treatment of skin cancer.
- Published
- 2015
5. rediscovering the city of Campina Grande through the sensorial perceptions of the visually impaired (1989-2011)
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JERÔNIMO, Tatiana Aparecida Pereira., SILVA, Keila Queiroz e., AGRA DO Ó, Alarcon., CIPRIANO, Maria do Socorro., and NASCIMENTO, Regina Coeli Gomes do.
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História de vida - metodologia ,Imaginário do deficiente visual ,Sensibilidade - deficientes visuais ,Cegos - percepções sensoriais ,Defisientes visuais ,Cidade de Campina Grande ,Percepção da cidade - Cegos ,História - Abstract
Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-04-20T16:27:23Z No. of bitstreams: 1 TATIANA APARECIDA PEREIRA JERÔNIMO - DISSERTAÇÃO PPGH 2014..pdf: 835636 bytes, checksum: 778e4d2fd89ac0801380bf3b05d3957f (MD5) Made available in DSpace on 2018-04-20T16:27:23Z (GMT). No. of bitstreams: 1 TATIANA APARECIDA PEREIRA JERÔNIMO - DISSERTAÇÃO PPGH 2014..pdf: 835636 bytes, checksum: 778e4d2fd89ac0801380bf3b05d3957f (MD5) Previous issue date: 2014-08 O lugar de onde falo e os caminhos pelos quais percorro me trouxeram inquietações e motivações para desenvolver esta pesquisa, que se propõe a analisar o modo como as experiências urbanas vivenciadas pelos deficientes visuais na cidade de Campina Grande lhes permitem construir e desenvolver suas percepções sensoriais através dos diversos contextos de mudanças sócio-espaciais ocorridas na cidade durante o período de 1989 e 2011. Partindo da perspectiva de diferentes compreensões que a pessoa com deficiência visual nos permite fazer sobre a cidade, dividimos nosso trabalho em três capítulos, nos quais iremos conhecer e analisar três trajetórias de vida e de experiências com a cidade de Campina Grande, bem diferenciadas. Entre essas experiências consideraremos o modo singular como a cegueira se apresentou em cada uma dessas trajetórias e como a vivência na cidade interferiu no processo de adaptação e aceitação da deficiência, bem como no aprendizado e descoberta de suas sensibilidades na construção de suas percepções sensoriais sobre a cidade de Campina Grande. Assim, os caminhos da nossa pesquisa foram percorridos com respaldo nas histórias de vida de cada depoente, buscando recompor em cada biografia os cortes temáticos efetuados em suas trajetórias pessoais. Desse modo, passando pelos diversos acontecimentos e conjunturas, vivenciados e experimentados por cada um deles nas mais diversas situações cotidianas, tentamos encontrar a melhor trajetória para compreendermos suas sensibilidades, dificuldades e fragilidades diante desse exercício muitas vezes tão doloroso e dramático de expor suas histórias de vida. Nesse sentido, nos aproximamos das análises Michel de Certeau, ao refletir sobre a cidade como um espaço praticado com passos que remontam caminhos de escrita da vida daqueles que a habitam. Sobre a construção desses espaços praticados no imaginário do deficiente visual, dialogamos com Yu-fu Tuan. Ao pensarmos a cidade não apenas como lugar visível, mas também sensível e imaginário nos aproximam das discussões sobre sensibilidades propostas por Sandra Jatahy Pesavento. Para compreender os estigmas e o imaginário que cercam a condição das pessoas com deficiência visual em nossa cidade, utilizamos as análises de Bruno Sena Martins. Entre outros autores que compõem e complementam significativamente nossas análises e interpretações sobre a pessoa com deficiência visual. analyzes how the urban experiences experienced by the visually impaired in the city of Campina Grande allow them to construct and develop their sensorial perceptions through the different contexts of socio-spatial changes that occurred in the city during the period of 1989 and 2011. Starting from the perspective of different understandings that the disabled person allows us to do about the city, we divide our work into three chapters, in the which we will know and analyze three life trajectories and experiences with the city of Campina Grande, well differentiated. Among these experiences we will consider the as blindness presented itself in each of these trajectories and how the experience in the city has interfered in the process of adaptation and acceptance of the disability, as well learning and discovering their sensibilities in constructing their perceptions sensory information about the city of Campina Grande. Thus, the paths of our research the life histories of each deponent, to recompose in each biography the thematic cuts made in their personal trajectories. In this way, going through the various events and conjunctures, experienced and experienced by each of them in the most diverse daily situations, we try to find the best path to understand their sensibilities, difficulties and weaknesses in the face of this often painful and dramatic exercise of exposing their Life stories. In this sense, we approach Michel de Certeau's reflect on the city as a space practiced with steps that go back writing of the lives of those who inhabit it. On the construction of these spaces practiced in the imaginary of the visually impaired, we dialogued with Yu-fu Tuan. When thinking about the city, only as a visible place, but also sensitive and imaginary. discussions on sensibilities proposed by Sandra Jatahy Pesavento. To understand the stigma and imagery surrounding the condition of people with visual impairment in our city, we use the analyzes of Bruno Sena Martins. Among other authors and complement our analyzes and interpretations person with visual impairment.
- Published
- 2014
6. Topical delivery of ocular therapeutics: carrier systems and physical methods
- Author
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Karina Dias, Daniela Spuri Bernardi, Joel G. Souza, Tatiana Aparecida Pereira, and Renata Fonseca Vianna Lopez
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Dendrimers ,Eye Diseases ,Anterior Chamber ,Contact Lenses ,Administration, Topical ,Pharmaceutical Science ,Pharmacology ,Drug Delivery Systems ,Cornea ,Solid lipid nanoparticle ,Medicine ,Humans ,Liposome ,Iontophoresis ,business.industry ,Hydrogels ,Sonophoresis ,Lipids ,Bioavailability ,Contact lens ,medicine.anatomical_structure ,Targeted drug delivery ,Liposomes ,Nanoparticles ,OFTALMOLOGIA ,Emulsions ,business - Abstract
Objective The basic concepts, major mechanisms, technological developments and advantages of the topical application of lipid-based systems (microemulsions, nanoemulsions, liposomes and solid lipid nanoparticles), polymeric systems (hydrogels, contact lenses, polymeric nanoparticles and dendrimers) and physical methods (iontophoresis and sonophoresis) will be reviewed. Key findings Although very convenient for patients, topical administration of conventional drug formulations for the treatment of eye diseases requires high drug doses, frequent administration and rarely provides high drug bioavailability. Thus, strategies to improve the efficacy of topical treatments have been extensively investigated. In general, the majority of the successful delivery systems are present on the ocular surface over an extended period of time, and these systems typically improve drug bioavailability in the anterior chamber whereas the physical methods facilitate drug penetration over a very short period of time through ocular barriers, such as the cornea and sclera. Summary Although in the early stages, the combination of these delivery systems with physical methods would appear to be a promising tool to decrease the dose and frequency of administration; thereby, patient compliance and treatment efficacy will be improved.
- Published
- 2013
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