18 results on '"Ferreira PP"'
Search Results
2. Cone beam computed tomography devices in the evaluation of buccal bone in anterior teeth
- Author
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Dantas, LL, primary, Ferreira, PP, additional, Oliveira, LSAF, additional, Neves, FS, additional, Campos, PSF, additional, Scarfe, WC, additional, and Crusoe‐Rebello, I, additional
- Published
- 2019
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3. Disentangling the veil line for Brazilian biodiversity: An overview from two long-term research programs reveals huge gaps in ecological data reporting.
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Guimaraes AF, de Alagao Querido LC, Rocha T, de Jesus Rodrigues D, Viana PL, de Godoy Bergallo H, Fernandes GW, Toma TSP, Streit H, Overbeck GE, de Souza AQS, Lima AP, da Rosa CA, de Viveiros Grelle CE, Lopes AM, Curcino A, de Paula AS, Andriolo A, Dos Santos Dias A, Santos AT, Bernardes AA, da Silva Oliveira AB, de Barros AAM, E Silva ACBL, da Cruz ACR, de Holanda ASS, Bueno AS, Nunes-Freitas AF, Yves A, da Silva Alencar A, Scabin AB, Manzatto AG, Lima ACS, Pontes ARM, Castro AB, Gomes AM, Banhos A, Rosado BHP, Dos Santos Batista CA, Siqueira CC, Fontana CS, da Rocha CFD, Brocardo CR, da Costa Doria CR, Castilho CV, Pessanha C, Cordeiro CAMM, Cronemberger C, Andretti CB, Cornelius C, Campos C, Borges-Matos C, Barros CF, Keller C, de Oliveira Cavalcante C, de Sales Dambros C, da Silva Machado DN, Tassinari D, Villela DM, Chiaraniv E, de Farias Geisler E, Velez-Martin E, Carvalho-Junior EAR, Drechsler-Santos ER, Lourenco EC, Franklin E, Higashikawa EM, Pezzini F, de Oliveira Roque F, Baccaro FB, Becker FG, Cabeceira FG, do Prado Florencio F, Barbosa FR, Pezzini F, Zuquim G, Ferreira GB, de Vargas GK, Mourao G, Rousseau GX, de Lima HC, Farias HLS, Kaefer IL, Ghizoni IR, da Costa de Noronha J, de Oliveira JL, Santos JRS, Jarenkow JA, de Melo-Junior JCF, Dos Santos JVC, de Oliveira J, de Souza JLP, Baumgratz JFA, de Morais JW, de Melo Silva J, de Gois Silva J, Wingert JM, Menger J, Ferrer J, Dayrell JS, da Silva-Goncalves KC, Torralvo K, da Silva Cruz K, da Silva Sylvestre L, de Andrade Ribas L, Battirola LD, Ramos L, Caires LR, da Silva Carvalho LC, Stegmann LF, Carvalho LN, da Silva Menezes L, Costa LM, Podgaiski LR, Silveira LF, Malabarba LR, Frangipani MA, Tabarelli M, Nascimento MT, Marques MCM, Spies MR, de Oliveira Dos Santos MA, Anaicy M, Vital MJS, Silveira M, Vieira MV, de Moura Araujo MA, de Almeida Silveira MAP, Barros MF, Faitanin MA, Iguatemy M, da Cunha MS, da Silva Murakami MM, Messias MR, Martins MB, Camana M, de Medeiros Correa N, Fonseca NC, Prieto-Benavides OO, Pena Rodrigues PJF, de Andrade PL, Pequeno PACL, Gananca PHS, da Silva Ferreira PP, de Andrade PCR, Azarak PA, de Fraga R, Rabelo RM, de Lima Santos R, Barbosa RI, Dala-Corte RB, Vicente RE, de Oliveira Perdiz R, da Cunha Araujo RP, de Andrade RTG, de Cassia Quitete Portela R, Fadini R, Feitosa RM, Santa-Brigida R, Cerqueira R, Muller SC, Santorelli S, Dos Santos SB, Cechin SZ, Avilla SS, Pansini S, Aragon S, da Silva Figueiredo T, Sobroza TV, de Fatima Ramos Guimaraes T, Dos Santos TF, Emilio T, de Azevedo Amorim T, Izzo T, Sogral T, Dos Santos TG, Vincent TL, de Lima Rocha T, Pillar VD, Mesquita VP, Silva VD, Cyrino VME, Borges-Junior VNT, Layme VMG, Mota WG, Santos WN, Drose W, Silva WR, and Magnusson WE
- Subjects
- Brazil, Ecology, Environmental Monitoring methods, Biodiversity, Conservation of Natural Resources methods
- Abstract
The lack of synthesized information regarding biodiversity is a major problem among researchers, leading to a pervasive cycle where ecologists make field campaigns to collect information that already exists and yet has not been made available for a broader audience. This problem leads to long-lasting effects in public policies such as spending money multiple times to conduct similar studies in the same area. We aim to identify this knowledge gap by synthesizing information available regarding two Brazilian long-term biodiversity programs and the metadata generated by them. Using a unique dataset containing 1904 metadata, we identified patterns of metadata distribution and intensity of research conducted in Brazil, as well as where we should concentrate research efforts in the next decades. We found that the majority of metadata were about vertebrates, followed by plants, invertebrates, and fungi. Caatinga was the biome with least metadata, and that there's still a lack of information regarding all biomes in Brazil, with none of them being sufficiently sampled. We hope that these results will have implications for broader conservation and management guiding, as well as to funding allocation programs., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)
- Published
- 2024
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4. Tomographic diagnosis of alveolar bone coverage impact in orthodontic planning: cross-sectional study.
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Montanha-Andrade K, Ferreira PP, DE Sena ACVP, Cury PR, and Crusoé-Rebello IM
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- Humans, Cross-Sectional Studies, Brazil, Cephalometry, Surveys and Questionnaires, Female, Male, Orthodontists, Tooth Movement Techniques, Orthodontics, Corrective, Cone-Beam Computed Tomography, Radiography, Panoramic, Alveolar Process diagnostic imaging, Patient Care Planning
- Abstract
Introduction: Alveolar bone coverage can be diagnosed through cone beam computed tomography (CBCT) and this information can prevent orthodontic tooth movement beyond the biological limit., Objective: This study evaluated the impact of the bone coverage (BC) diagnosis by CBCT in the orthodontists' planning., Methods: One hundred fifty-nine Brazilian orthodontists suggested treatment plans for six patients at two different times, using two sequential questionnaires. The first questionnaire consisted of extra and intra-oral photographs, one panoramic radiograph; one lateral cephalometric radiograph with Steiner and Tweed analysis, and the patient chief complaint. The second questionnaire included the same presentations of cases with tomographic images and the radiologist's report. The McNemar test assessed the difference between the first and the second treatment plans., Results: In all six cases, most participants changed the treatment plan after evaluating the CBCT images and the radiologist's report (93.7% in case 5, 78.6% in case 4, 74.2% in case 3, 69.8% in case 6, 66% in case 2 and 61% in case 1; p≤0.01)., Conclusion: The evaluation of bone coverage through CBCT images has a substantial impact on the orthodontic diagnosis and planning of the Brazilian orthodontists.
- Published
- 2024
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5. From Health Communication to Health Literacy: A Comprehensive Analysis of Relevance and Strategies.
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Caeiros P, Ferreira PP, Chen-Xu J, Francisco R, and de Arriaga MT
- Abstract
Health literacy, the ability to obtain and comprehend health knowledge, is essential to promote health and reduce disparities. Health communication aims to improve health by ensuring an effective understanding and application of health information. Despite current challenges, there are many opportunities for improving communication in the health literacy practice. Promoting communication in health literacy is essential in empowering individuals, improving outcomes, and reducing healthcare disparities. Effective communication enables access, comprehension, and informed decision-making of individuals and communities regarding their health, strengthening their central role in promoting health literacy. This paper highlights the challenges and opportunities in today's world, especially in a post-pandemic era, dominated by infodemic and social media influencers, while providing solutions, encompassing professional training of health professionals on communication, digital skills, and an overarching strategy across health institutions. Translating knowledge into health-promoting behaviors and well-being can only be effective by accounting for communication in health literacy., Competing Interests: The authors have no conflicts of interest to declare., (© 2024 The Author(s). Published by S. Karger AG, Basel on behalf of NOVA National School of Public Health.)
- Published
- 2024
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6. Decentralization of the health system - experiences from Pakistan, Portugal and Brazil.
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Mahmood S, Sequeira R, Siddiqui MMU, Herkenhoff MBA, Ferreira PP, Fernandes AC, and Sousa P
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- Humans, Brazil, Developing Countries, Pakistan, Portugal, Delivery of Health Care organization & administration, Health Care Reform organization & administration, Health Policy, Politics
- Abstract
Background: Decentralization of a health system is a complex and multidimensional phenomenon that demands thorough investigation of its process logistics, predisposing factors and implementation mechanisms, within the broader socio-political environment of each nation. Despite its wide adoption across both high-income countries (HICs) and low-and-middle-income countries (LMICs), empirical evidence of whether decentralization actually translates into improved health system performance remains inconclusive and controversial. This paper aims to provide a comprehensive description of the decentralization processes in three countries at different stages of their decentralization strategies - Pakistan, Brazil and Portugal., Main Body: This study employed a systematic analysis of peer-reviewed academic journals, official government reports, policy documents and publications from international organizations related to health system decentralization. A comprehensive search was conducted using reputable databases such as PubMed, Google Scholar, the WHO repository and other relevant databases, covering the period up to the knowledge cutoff date in June 2023. Information was systematically extracted and organized into the determinants, process mechanics and challenges encountered during the planning, implementation and post-decentralization phases. Although decentralization reforms have achieved some success, challenges persist in their implementation. Comparing all three countries, it was evident that all three have prioritized health in their decentralization reforms and aimed to enhance local decision-making power. Brazil has made significant progress in implementing decentralization reforms, while Portugal and Pakistan are still in the process. Pakistan has faced significant implementation challenges, including capacity-building, resource allocation, resistance to change and inequity in access to care. Brazil and Portugal have also faced challenges, but to a lesser extent. The extent, progress and challenges in the decentralization processes vary among the three countries, each requiring ongoing evaluation and improvement to achieve the desired outcomes., Conclusion: Notable differences exist in the extent of decentralization, the challenges faced during implementation and inequality in access to care between the three countries. It is important for Portugal, Brazil and Pakistan to address these through reinforcing implementation strategies, tackling inequalities in access to care and enhancing monitoring and evaluation mechanism. Additionally, fostering knowledge sharing among these different countries will be instrumental in facilitating mutual learning., (© 2024. The Author(s).)
- Published
- 2024
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7. Temperature and quantum anharmonic lattice effects on stability and superconductivity in lutetium trihydride.
- Author
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Lucrezi R, Ferreira PP, Aichhorn M, and Heil C
- Abstract
In this work, we resolve conflicting experimental and theoretical findings related to the dynamical stability and superconducting properties of [Formula: see text]-LuH
3 , which was recently suggested as the parent phase harboring room-temperature superconductivity at near-ambient pressures. Including temperature and quantum anharmonic lattice effects in our calculations, we demonstrate that the theoretically predicted structural instability of the [Formula: see text] phase near ambient pressures is suppressed for temperatures above 200 K. We provide a p-T phase diagram for stability up to pressures of 6 GPa, where the required temperature for stability is reduced to T > 80 K. We also determine the superconducting critical temperature Tc of [Formula: see text]-LuH3 within the Migdal-Eliashberg formalism, using temperature- and quantum-anharmonically-corrected phonon dispersions, finding that the expected Tc for electron-phonon mediated superconductivity is in the range of 50-60 K, i.e., well below the temperatures required to stabilize the lattice. When considering moderate doping based on rigidly shifting the Fermi level, Tc decreases for both hole and electron doping. Our results thus provide evidence that any observed room-temperature superconductivity in pure or doped [Formula: see text]-LuH3 , if confirmed, cannot be explained by a conventional electron-phonon mediated pairing mechanism., (© 2024. The Author(s).)- Published
- 2024
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8. Search for ambient superconductivity in the Lu-N-H system.
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Ferreira PP, Conway LJ, Cucciari A, Di Cataldo S, Giannessi F, Kogler E, Eleno LTF, Pickard CJ, Heil C, and Boeri L
- Abstract
Motivated by the recent report of room-temperature superconductivity at near-ambient pressure in N-doped lutetium hydride, we performed a comprehensive, detailed study of the phase diagram of the Lu-N-H system, looking for superconducting phases. We combined ab initio crystal structure prediction with ephemeral data-derived interatomic potentials to sample over 200,000 different structures. Out of the more than 150 structures predicted to be metastable within ~50 meV from the convex hull we identify 52 viable candidates for conventional superconductivity, for which we computed their superconducting properties from Density Functional Perturbation Theory. Although for some of these structures we do predict a finite superconducting T
c , none is even remotely compatible with room-temperature superconductivity as reported by Dasenbrock et al. Our work joins the broader community effort that has followed the report of near-ambient superconductivity, confirming beyond reasonable doubt that no conventional mechanism can explain the reported Tc in Lu-N-H., (© 2023. Springer Nature Limited.)- Published
- 2023
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9. Superconductivity in Te-Deficient ZrTe 2 .
- Author
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Correa LE, Ferreira PP, de Faria LR, Fim VM, da Luz MS, Torikachvili MS, Heil C, Eleno LTF, and Machado AJS
- Abstract
We present structural, electrical, and thermoelectric potential measurements on high-quality single crystals of ZrTe
1.8 grown from isothermal chemical vapor transport. These measurements show that the Te-deficient ZrTe1.8 , which forms the same structure as the nonsuperconducting ZrTe2 , is superconducting below 3.2 K. The temperature dependence of the upper critical field (Hc 2 ) deviates from the behavior expected in conventional single-band superconductors, being best described by an electron-phonon two-gap superconducting model with strong intraband coupling. For the ZrTe1.8 single crystals, the Seebeck potential measurements suggest that the charge carriers are predominantly negative, in agreement with the ab initio calculations. Through first-principles calculations within DFT, we show that the slight reduction of Te occupancy in ZrTe2 unexpectedly gives origin to density of states peaks at the Fermi level due to the formation of localized Zr- d bands, possibly promoting electronic instabilities at the Fermi level and an increase at the critical temperature according to the standard BCS theory. These findings highlight that the Te deficiency promotes the electronic conditions for the stability of the superconducting ground state, suggesting that defects can fine-tune the electronic structure to support superconductivity., Competing Interests: The authors declare no competing financial interest., (© 2023 The Authors. Published by American Chemical Society.)- Published
- 2023
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10. Comparative Effectiveness of COVID-19 Vaccines in Preventing Infections and Disease Progression from SARS-CoV-2 Omicron BA.5 and BA.2, Portugal.
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Kislaya I, Casaca P, Borges V, Sousa C, Ferreira BI, Fonte A, Fernandes E, Dias CM, Duarte S, Almeida JP, Grenho I, Coelho L, Ferreira R, Ferreira PP, Borges CM, Isidro J, Pinto M, Menezes L, Sobral D, Nunes A, Santos D, Gonçalves AM, Vieira L, Gomes JP, Leite PP, Nunes B, Machado A, and Peralta-Santos A
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- Humans, Portugal, Cohort Studies, SARS-CoV-2, Disease Progression, COVID-19 Vaccines, COVID-19
- Abstract
We estimated comparative primary and booster vaccine effectiveness (VE) of SARS-CoV-2 Omicron BA.5 and BA.2 lineages against infection and disease progression. During April-June 2022, we implemented a case-case and cohort study and classified lineages using whole-genome sequencing or spike gene target failure. For the case-case study, we estimated the adjusted odds ratios (aORs) of vaccination using a logistic regression. For the cohort study, we estimated VE against disease progression using a penalized logistic regression. We observed no reduced VE for primary (aOR 1.07 [95% CI 0.93-1.23]) or booster (aOR 0.96 [95% CI 0.84-1.09]) vaccination against BA.5 infection. Among BA.5 case-patients, booster VE against progression to hospitalization was lower than that among BA.2 case-patients (VE 77% [95% CI 49%-90%] vs. VE 93% [95% CI 86%-97%]). Although booster vaccination is less effective against BA.5 than against BA.2, it offers substantial protection against progression from BA.5 infection to severe disease.
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- 2023
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11. Value of Immunohistochemistry to Differentiate Digital Papillary Adenocarcinoma From Acral Hidradenoma With Papillary Structures.
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Xavier-Júnior JCC, Camilo-Júnior DJ, Carneiro Dias AL, Marques Ferreira PP, Abdalla Filho AR, and Brenn T
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- Adult, Humans, Immunohistochemistry, Male, S100 Proteins, Acrospiroma diagnosis, Acrospiroma surgery, Adenocarcinoma, Clear Cell, Adenocarcinoma, Papillary chemistry, Adenocarcinoma, Papillary diagnosis, Adenocarcinoma, Papillary surgery, Adenoma, Sweat Gland pathology, Bone Neoplasms, Breast Neoplasms, Carcinoma, Skin Appendage, Skin Neoplasms diagnosis, Skin Neoplasms pathology, Skin Neoplasms surgery, Sweat Gland Neoplasms diagnosis, Sweat Gland Neoplasms metabolism, Sweat Gland Neoplasms surgery
- Abstract
Abstract: Digital papillary adenocarcinoma is a malignant adnexal tumor with a predilection for acral sites. Hidradenoma is a benign solid and cystic sweat gland neoplasm with focal ductal and glandular differentiation and good outcomes. Hidradenomas can occur at acral sites and show papillary structures; for this reason, they are included in the differential diagnosis of digital papillary adenocarcinoma, and immunohistochemistry is a valuable tool in this scenario. We described a case of a 43-year-old man with an epithelial tumor showing papillary structures in the intermediate phalanx of the fourth finger. There was diffuse positivity for p63 and negativity for S100 protein, suggesting that this tumor was an acral hidradenoma with papillary structures., Competing Interests: The authors declare no conflicts of interest., (Copyright © 2022 Wolters Kluwer Health, Inc. All rights reserved.)
- Published
- 2022
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12. Electron-phonon superconductivity in C-doped topological nodal-line semimetal Zr 5 Pt 3 : a muon spin rotation and relaxation (μSR) study.
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Bhattacharyya A, Ferreira PP, Panda K, Masunaga SH, de Faria LR, Correa LE, Santos FB, Adroja DT, Yokoyama K, Dorini TT, Jardim RF, Eleno LTF, and Machado AJS
- Abstract
In the present work, we demonstrate that C-doped Zr
5 Pt3 is an electron-phonon superconductor (with critical temperature TC = 3.8 K) with a nonsymmorphic topological Dirac nodal-line semimetal state, which we report here for the first time. The superconducting properties of Zr5 Pt3 C0.5 have been investigated by means of magnetization, resistivity, specific heat, and muon spin rotation and relaxation (μSR) measurements. We find that at low temperatures, the depolarization rate is almost constant and it can be well described by a single-band s -wave model with a superconducting gap of 2Δ(0)/ kB TC = 3.84, somewhat higher than the value of BCS theory. From the transverse field μSR analysis, we estimate the London penetration depth λL = 469 nm, superconducting carrier density ns = 1.83 × 1026 m-3 , and effective mass m * = 1.428 me . The zero field μSR confirms the absence of any spontaneous magnetic field in the superconducting ground state. In order to gain additional insights into the electronic ground state of C-doped Zr5 Pt3 , we also performed first-principles calculations within the framework of density functional theory (DFT). The observed homogenous electronic character of the Fermi surface as well as the mutual decrease of TC and density of states at the Fermi level are consistent with the experimental findings of this study. However, the band structure reveals the presence of robust, gapless fourfold-degenerate nodal lines protected by 63 screw rotations and glide mirror planes. Therefore, Zr5 Pt3 represents a novel, unprecedented condensed matter system to investigate the intricate interplay between superconductivity and topology., (© 2021 IOP Publishing Ltd.)- Published
- 2021
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13. Tomographic evaluation of buccal bone in different skeletal patterns and incisors inclination.
- Author
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Lessa AMG, Ferreira PP, Dantas LL, de Castellucci E Barbosa M, Neves FS, and Rebello IMCR
- Subjects
- Cephalometry, Cone-Beam Computed Tomography, Humans, Mandible diagnostic imaging, Incisor diagnostic imaging, Malocclusion, Angle Class III
- Abstract
Objective: The aim of this study was to correlate the absence of BB with skeletal patterns and incisor inclination using cone-beam computed tomography (CBCT)., Methods: The sample comprised CBCT images of 45 patients undergoing orthodontic treatment. BB was classified in each third of the anterior teeth as critical, slender, regular, and thick. The skeletal pattern was determined by the ANB (A point, nasion, B point) angle and the incisor inclination using the 1.NA and 1.NB measurements and the interincisal angle (1:1)., Results: In both analyses, the skeletal pattern of class II revealed better BB in the cervical and middle thirds than classes I and III. A higher proportion of critical BB was found in the middle thirds, and the apical third presented the best regular and thick BB conditions, mainly class I. Less BB was observed in middle and apical thirds in the upper incisors and in cervical thirds in lower incisors, mostly when they were more upright., Conclusions: Knowledge of alveolar bone height and thickness can alter the treatment plan in orthodontics. During orthodontic treatment, more attention should be paid to the lower incisors and vertical teeth because of poor BB conditions, especially in class III skeletal patterns., (© 2021. Japanese Society for Oral and Maxillofacial Radiology and Springer Nature Singapore Pte Ltd.)
- Published
- 2021
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14. Vitamin D supplementation improves the metabolic syndrome risk profile in postmenopausal women.
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Ferreira PP, Cangussu L, Bueloni-Dias FN, Orsatti CL, Schmitt EB, Nahas-Neto J, and Nahas EAP
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- Aged, Biomarkers blood, Dietary Supplements, Female, Humans, Metabolic Syndrome blood, Middle Aged, Risk Factors, Vitamin D analogs & derivatives, Vitamin D blood, Metabolic Syndrome prevention & control, Postmenopause, Vitamin D administration & dosage, Vitamin D Deficiency drug therapy, Vitamins administration & dosage
- Abstract
Objective: This study aimed to evaluate the effect of isolated vitamin D (VD) supplementation on the metabolic syndrome (MetS) risk profile in postmenopausal women. Methods: In this double-blind, placebo-controlled trial, 160 postmenopausal women aged 50-65 years were randomized into two groups: VD group, supplementation with 1000 IU vitamin D
3 /day ( n = 80); or placebo group ( n = 80). The intervention time was 9 months, and the women were assessed at baseline and endpoint. Clinical and anthropometric data were collected. Biochemical parameters, including total cholesterol, high-density lipoprotein, low-density lipoprotein, triglycerides, glucose, and insulin, were measured. The plasma concentration of 25-hydroxyvitamin D (25(OH)D) was measured by high-performance liquid chromatography. Results: After 9 months, there was a significant increase in the 25(OH)D levels for VD group (+45.4%, p < 0.001), and a decrease (-18.5%, p = 0.049) in the placebo group. In the VD group, a significant reduction was observed in triglycerides (-12.2%, p = 0.001), insulin (-13.7%, p = 0.008), and the homeostasis model assessment of insulin resistance (-17.9%, p = 0.007). In the placebo group, there was an increase in glucose (+6.2%, p = 0.009). Analysis of the risk adjusted for age, time since menopause, and body mass index showed that women supplemented with VD had a lower risk of MetS (odds ratio [OR] 0.42; 95% confidence interval [CI] 0.21-0.83), hypertriglyceridemia (OR 0.43; 95% CI 0.22-0.85), and hyperglycemia (OR 0.23; 95% CI 0.10-0.52) compared to the placebo group ( p < 0.05). Conclusions: In postmenopausal women with VD deficiency, isolated supplementation with 1000 IU vitamin D3 for 9 months was associated with a reduction in the MetS risk profile. Women undergoing VD supplementation had a lower risk of MetS, hypertriglyceridemia, and hyperglycemia.- Published
- 2020
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15. Differential behavioural responses to venlafaxine exposure route, warming and acidification in juvenile fish (Argyrosomus regius).
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Maulvault AL, Santos LHMLM, Paula JR, Camacho C, Pissarra V, Fogaça F, Barbosa V, Alves R, Ferreira PP, Barceló D, Rodriguez-Mozaz S, Marques A, Diniz M, and Rosa R
- Subjects
- Animals, Carbon Dioxide toxicity, Climate Change, Fishes, Hydrogen-Ion Concentration, Oceans and Seas, Seawater, Temperature, Toxicity Tests, Global Warming, Perciformes physiology, Serotonin and Noradrenaline Reuptake Inhibitors toxicity, Stress, Physiological physiology, Venlafaxine Hydrochloride toxicity, Water Pollutants, Chemical toxicity
- Abstract
Antidepressants, such as venlafaxine (VFX), which are considered emerging environmental pollutants, are increasingly more present in the marine environment, and recent evidence suggest that they might have adverse effects on fish behaviour. Furthermore, altered environmental conditions associated to climate change (e.g. warming and acidification) can also have a determinant role on fish behaviour, fitness and survival. Yet, the underlying interactions between these environmental stressors (pharmaceuticals exposure and climate change) are still far from being fully understood. The aim of this study was to assess behavioural responses (in juvenile meagre (Argyrosomus regius) exposed to VFX via water ([VFX] ~20μgL
-1 ) and via dietary sources ([VFX] ~160μgkg-1 dry weight), as well as to increased temperature (ΔT°C=+5°C) and high CO2 levels (ΔpCO2 ~1000μatm; equivalent to ΔpH=-0.4units). Overall, VFX bioaccumulation in fish plasma was enhanced under the combination of warming and acidification. VFX triggered fish exploration, whereas fish activity and shoal cohesion were reduced. Acidification alone decreased fish exploration and shoal cohesion, and reversed fish preference to turn leftwards compared to control conditions. Such alterations were further enhanced by VFX exposure. The combination of warming and acidification also reduced shoal cohesion and loss of lateralization, regardless of VFX exposure. The distinct behaviour observed when VFX contamination, acidification and warming acted alone or in combination highlighted the need to consider the likely interactive effects of seawater warming and acidification in future research regarding the toxicological aspects of chemical contaminants., (Copyright © 2018. Published by Elsevier B.V.)- Published
- 2018
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16. Integrated multi-biomarker responses of juvenile seabass to diclofenac, warming and acidification co-exposure.
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Maulvault AL, Barbosa V, Alves R, Anacleto P, Camacho C, Cunha S, Fernandes JO, Ferreira PP, Rosa R, Marques A, and Diniz M
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- Animals, Antioxidants metabolism, Bass growth & development, Brain drug effects, Brain metabolism, Carbon Dioxide chemistry, Cell Survival drug effects, Erythrocytes cytology, Erythrocytes drug effects, Larva drug effects, Larva metabolism, Liver drug effects, Liver metabolism, Muscles drug effects, Muscles metabolism, Bass metabolism, Biomarkers metabolism, Diclofenac toxicity, Global Warming, Oxidative Stress drug effects, Water Pollutants, Chemical toxicity
- Abstract
Pharmaceutical drugs, such as diclofenac (DCF), are frequently detected in the marine environment, and recent evidence has pointed out their toxicity to non-target marine biota. Concomitantly, altered environmental conditions associated with climate change (e.g. warming and acidification) can also affect the physiology of marine organisms. Yet, the underlying interactions between these environmental stressors (pharmaceutical exposure and climate change-related stressors) still require a deeper understanding. Comprehending the influence of abiotic variables on chemical contaminants' toxicological attributes provides a broader view of the ecological consequences of climate change. Hence, the aim of this study was to assess the ecotoxicological responses of juvenile seabass Dicenthrachus labrax under the co-exposure to DCF (from dietary sources, 500 ± 36 ng kg
-1 dw), warming (ΔTºC = +5 °C) and acidification (ΔpCO2 ∼1000 μatm, equivalent to ΔpH = -0.4 units), using an "Integrated Biomarker Response" (IBR) approach. Fish were exposed to these three stressors, acting alone or combined, for 28 days in a full cross-factorial design, and blood, brain, liver and muscle tissues were subsequently collected in order to evaluate: i) animal/organ fitness; ii) hematological parameters and iii) molecular biomarkers. Results not only confirmed the toxicological attributes of dietary exposure to DCF in marine fish species at the tissue (e.g. lower HSI), cellular (e.g. increased ENAs and lower erythrocytes viability) and molecular levels (e.g. increased oxidative stress, protein degradation, AChE activity and VTG synthesis), but also showed that such attributes are altered by warming and acidification. Hence, while acidification and/or warming enhanced some effects of DCF exposure (e.g. by further lowering erythrocyte viability, and increasing brain GST activity and Ub synthesis in muscle), the co-exposure to these abiotic stressors also resulted in a reversion/inhibition of some molecular responses (e.g. lower CAT and SOD inhibition and VTG synthesis). IBRs evidenced that an overall higher degree of stress (i.e. high IBR index) was associated with DCF and warming co-exposure, while the effects of acidification were less evident. The distinct responses observed when DCF acted alone or the animals were co-exposed to the drug together with warming and acidification not only highlighted the relevance of considering the interactions between multiple environmental stressors in ecotoxicological studies, but also suggested that the toxicity of pharmaceuticals can be aggravated by climate change-related stressors (particularly warming), thus, posing additional biological challenges to marine fish populations., (Copyright © 2018 Elsevier B.V. All rights reserved.)- Published
- 2018
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17. Horizontal study of vaccinia virus infections in an endemic area: epidemiologic, phylogenetic and economic aspects.
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Assis FL, Franco-Luiz AP, Paim LM, Oliveira GP, Pereira AF, de Almeida GM, Figueiredo LB, Tanus A, Trindade GS, Ferreira PP, Kroon EG, and Abrahão JS
- Subjects
- Animals, Brazil, Cattle, Cattle Diseases economics, Cattle Diseases epidemiology, Cattle Diseases transmission, Disease Outbreaks economics, Humans, Vaccinia economics, Vaccinia epidemiology, Vaccinia transmission, Vaccinia virus genetics, Zoonoses economics, Zoonoses epidemiology, Zoonoses transmission, Zoonoses virology, Cattle Diseases virology, Phylogeny, Vaccinia veterinary, Vaccinia virology, Vaccinia virus classification, Vaccinia virus isolation & purification
- Abstract
Vaccinia virus (VACV), the etiological agent of bovine vaccinia (BV), is widespread in Brazil and present in most of the milk-producing regions. We conducted a horizontal study of BV in Bahia, a state of Brazil in which the production of milk is increasing. During 2011, human and bovine clinical samples were collected during outbreaks for BV diagnosis, virus isolation and molecular analysis. We collected data for epidemiological inferences. Vaccinia virus was detected in 87.7% of the analyzed outbreaks, highlighting the effective circulation of VACV in Bahia. The molecular data showed the spreading of group 1 Brazilian VACV to Bahia. We observed a seasonal profile of BV, with its peak in the drier and cooler season. Manual milking was observed in 96 % of the visited properties, showing its importance to viral spread in herds. Under-notification of BV, ineffective animal trade surveillance, and bad milking practices have contributed to the spread of VACV in Brazil.
- Published
- 2015
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18. Stereotactic body radiotherapy in lung cancer: an update.
- Author
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Abreu CE, Ferreira PP, de Moraes FY, Neves WF Jr, Gadia R, and Carvalho Hde A
- Subjects
- Carcinoma, Non-Small-Cell Lung pathology, Decision Making, Humans, Lung Neoplasms pathology, Neoplasm Staging, Neoplasms, Multiple Primary surgery, Neoplasms, Second Primary surgery, Pulmonary Disease, Chronic Obstructive complications, Treatment Outcome, Carcinoma, Non-Small-Cell Lung surgery, Lung Neoplasms surgery, Radiosurgery
- Abstract
For early-stage lung cancer, the treatment of choice is surgery. In patients who are not surgical candidates or are unwilling to undergo surgery, radiotherapy is the principal treatment option. Here, we review stereotactic body radiotherapy, a technique that has produced quite promising results in such patients and should be the treatment of choice, if available. We also present the major indications, technical aspects, results, and special situations related to the technique.
- Published
- 2015
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