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Leukotriene-A4-Hydrolase and Basic Aminopeptidase Activities Are Related with Collagen-Induced Arthritis in a Compartment-Dependent Manner

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Open Journal of Rheumatology and Autoimmune Diseases 2013年第4期3卷 255-262页

作者： Mariana Trivilin Mendes paulo flavio silveira Laboratory of Pharmacology Unit of Translational Endocrine Physiology and PharmacologyInstituto ButantanSao PauloBrazil Department of Physiology Instituto de BiociênciasUniversidade de Sao PauloSao PauloBrazil

Objective: Previous study demonstrated the involvement of basic aminopeptidase (APB) activity in the development of collagen-induced arthritis (CIA). Two zinc dependent metalloenzymes (EC 3.***.11.6 and EC 3.***.2.6) are known to exhibit concomitantly APB and leukotriene-A4-hydrolase (LT-A4-H) activities. Influence of the interrelationship between both activities on arthritic processes, however, is presently uncertain. This study aimed to compare these activities in CIA. Methods: CIA was induced in rats and arthritis was assessed macroscopically. Ultracentrifugation was used to separate soluble (S) and solubilized membrane-bound (M) fractions from peripheral blood mononuclear cells (PBMCs) and synovial tissue (ST). Enzyme immunoassay was used to measure LT-A4-H activity, and Real Time Polymerase Chain Reaction was used for evaluating EC 3.***.11.6 and EC 3.***.2.6 gene expressions. Results: The existence of genes for EC 3.***.2.6 and EC 3.***.11.6 was demonstrated in the ST. Compared with control, LT-A4-H activity increased in synovial fluid (SF) and in S-PBMCs of CIA-arthritic and CIA-resistant and in M-ST of CIA-resistant, while it decreased in M-PBMCs of CIA-arthritic and CIA-resistant. In all these locations APB activity remained unchanged or inversely correlated with LT-A4-H activity. Conclusions: LT-A4-H and APB activities in joint-related samples are associated, for the first time, with EC 3.***.2.6 and EC 3.***.11.6 genes, exhibiting a compartment-dependent differential modulation of their specificity, efficiency and/or affinity or an inverse concurrent pattern. Changes in LT-A4-H activity have implications for development or resistance to arthritis in CIA model with a potential to be a diagnostic tool.

关键词： Aminopeptidase Ether Hydrolase Bifunctional Enzyme Eicosanoids

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Benchmarks for Pirá2.0,a Reading Comprehension Dataset about the Ocean,the Brazilian Coast,and Climate Change

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Data Intelligence 2024年第1期6卷 29-63页

作者： paulo Pirozelli Marcos M.José Igor silveira Flávio Nakasato Sarajane M.Peres Anarosa A.F.Brandão Anna H.R.Costa Fabio G.Cozman Universidade de São paulo Ringgold Standard Institution-Instituto de Estudos Avançados Av.370 São Paulo 05508-900Brazil Universidade de São paulo Ringgold Standard Institution-Instituto de Matemática e Estatística Av.370 São Paulo 05508-900Brazil Universidade de São paulo Rua Cayowaá876 apto 141SÃO PAULO 05018-001Brazil Universidade de São paulo Ringgold Standard Institution Escola Politécnica Av.370São Paulo 05508-900Brazil.

Piráis a reading comprehension dataset focused on the ocean,the Brazilian coast,and climate change,built from a collection of scientific abstracts and reports on these *** dataset represents a versatile language resource,particularly useful for testing the ability of current machine learning models to acquire expert scientific *** its potential,a detailed set of baselines has not yet been developed for Pirá.By creating these baselines,researchers can more easily utilize Piráas a resource for testing machine learning models across a wide range of question answering *** this paper,we define six benchmarks over the Pirádataset,covering closed generative question answering,machine reading comprehension,information retrieval,open question answering,answer triggering,and multiple choice question *** part of this effort,we have also produced a curated version of the original dataset,where we fixed a number of grammar issues,repetitions,and other ***,the dataset has been extended in several new directions,so as to face the aforementioned benchmarks:translation of supporting texts from English into Portuguese,classification labels for answerability,automatic paraphrases of questions and answers,and multiple choice *** results described in this paper provide several points of reference for researchers interested in exploring the challenges provided by the Pirádataset.

关键词： Natural language processing Question answering Benchmarks Language resource DomainOriented dataset Scientific knowledge text dataset

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Numerical Solutions of the Classical and Modified Buckley-Leverett Equations Applied to Two-Phase Fluid Flow

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Open Journal of Fluid Dynamics 2024年第3期14卷 184-204页

作者： Raphael de O. Garcia Graciele P. silveira Department of Actuarial Science Federal University of So Paulo Osasco Brazil Department of Physics Chemistry and Mathematics Federal University of So Carlos Sorocaba Brazil

Climate change is a reality. The burning of fossil fuels from oil, natural gas and coal is responsible for much of the pollution and the increase in the planet’s average temperature, which has raised discussions on the subject, given the emergencies related to climate. An energy transition to clean and renewable sources is necessary and urgent, but it will not be quick. In this sense, increasing the efficiency of oil extraction from existing sources is crucial, to avoid waste and the drilling of new wells. The purpose of this work was to add diffusive and dispersive terms to the Buckley-Leverett equation in order to incorporate extra phenomena in the temporal evolution between the water-oil and oil-water transitions in the pipeline. For this, the modified Buckley-Leverett equation was discretized via essentially weighted non-oscillatory schemes, coupled with a three-stage Runge-Kutta and a fourth-order centered finite difference methods. Then, computational simulations were performed and the results showed that new features emerge in the transitions, when compared to classical simulations. For instance, the dispersive term inhibits the diffusive term, adding oscillations, which indicates that the absorption of the fluid by the porous medium occurs in a non-homogeneous manner. Therefore, based on research such as this, decisions can be made regarding the replacement of the porous medium or the insertion of new components to delay the replacement.

关键词： Computational Fluid Dynamics Buckley-Leverett Equation Numerical Methods Two-phase Fluid Flow

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Extracellular vesicles-coupled miRNAs from oviduct and uterus modulate signaling pathways related to lipid metabolism and bovine early embryo development

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Journal of Animal Science and Biotechnology 2024年第4期15卷 1528-1549页

作者： Rosane Mazzarella Karina Canon‑Beltran Yulia N.Cajas Meriem Hamdi Encina M.Gonzalez Juliano C.da silveira Claudia L.V.Leal D.Rizos Department of Animal Reproduction INIA-CSICMadridSpain Department of Biochemistry and Molecular Biology Veterinary FacultyComplutense University of Madrid(UCM)MadridSpain Department Agrarian Production Technical University of MadridUPMMadridSpain Departamento de Ciencias Biologicas Universidad Tecnica Particular de LojaUTPLLojaEcuador Department of Anatomy and Embryology FV-UCMMadridSpain Department of Veterinary Medicine FZEA-USPPirassunungaBrazil

Background Extracellular vesicles(EVs) present in oviductal(OF) and uterine fluid(UF) have been shown to enhance bovine embryo quality during in vitro culture by reducing lipid contents and modulating lipid metabolism-related genes(LMGs), while also influencing cell proliferation, suggesting their involvement on the regulation of different biological pathways. The regulation of signaling pathways related to cell differentiation, proliferation, and metabo-lism is crucial for early embryo development and can determine the success or failure of the pregnancy. Bioactive molecules within EVs in maternal reproductive fluids, such as micro RNAs(miRNAs), may contribute to this regulatory process as they modulate gene expression through post-transcriptional *** This study evaluated miRNA cargo in OF-EVs from the early luteal phase and UF-EVs from the mid-luteal phase, coinciding with embryo transit within oviduct and uterus in vivo, and its possible influence on LMGs and sign-aling pathways crucial for early embryo development. A total of 333 miRNAs were detected, with 11 exclusive to OF, 59 to UF, and 263 were common between both groups. From the 20 differentially expressed miRNAs, 19 up-regulated in UF-EVs(bta-miR-134, bta-miR-151-3p, bta-miR-155, bta-miR-188, bta-miR-181b, bta-miR-181d, bta-miR-224, bta-miR-23b-3p, bta-miR-24-3p, bta-miR-27a-3p, bta-miR-29a, bta-miR-324, bta-miR-326, bta-miR-345-3p, bta-miR-410, bta-miR-652, bta-miR-677, bta-miR-873 and bta-miR-708) and one(bta-miR-148b) in OF-EVs. These miRNAs were predicted to modulate several pathways such as Wnt, Hippo, MAPK, and lipid metabolism and degradation. Differ-ences in miRNAs found in OF-EVs from the early luteal phase and UF-EVs from mid-luteal phase may reflect differ-ent environments to meet the changing needs of the embryo. Additionally, miRNAs may be involved, particularly in the uterus, in the regulation of embryo lipid metabolism, immune system, and *** Our study su

关键词： Embryo-maternal interaction Epigenetic Exosomes Mammalian Preimplantation Reproductive fluids

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Physico-chemical characterization of acid base disorders in patients with COVID-19:A cohort study

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World Journal of Nephrology 2024年第2期13卷 16-23页

作者： Sergio Pinto de Souza Juliana R Caldas Marcelo Barreto Lopes Marcelo Augusto Duarte silveira Fernanda Oliveira Coelho Igor Oliveira Queiroz Pedro Domingues Cury Rogério da Hora Passos Department of Nephrology Hospital São RafaelSalvadorBA 41253190Brazil Department of Nephrology D’Or Institute for Research and Education(IDOR)SalvadorBA 41253190Brazil Faculty of Medicine Escola Bahiana de Medicina e Saúde Pública-EBMSPSalvadorBA 40290000Brazil Department of Intensive Care D’Or Institute for Research and Education(IDOR)SalvadorBA 41253190Brazil Hospital São Rafael D’Or Institute for Research and Education(IDOR)SalvadorBA 41253190Brazil Department of Intensive Care Unit Hospital Israelita Albert EinsteinSao PauloSP 05652900Brazil

BACKGROUND Acid-base imbalance has been poorly described in patients with coronavirus disease 2019(COVID-19).Study by the quantitative acid-base approach may be able to account for minor changes in ion distribution that may have been over-looked using traditional acid-base analysis *** a cohort of critically ill COVID-19 patients,we looked for an association between metabolic acidosis surrogates and worse clinical outcomes,such as mortality,renal dialysis,and length of hospital *** To describe the acid-base disorders of critically ill COVID-19 patients using Stewart’s approach,associating its variables with poor *** This study pertained to a retrospective cohort comprised of adult patients who experienced an intensive care unit stay exceeding 4 days and who were diagnosed with severe acute respiratory syndrome coronavirus 2 infection through a positive polymerase chain reaction analysis of a nasal swab and typical pulmonary involvement observed in chest computed tomography *** and clinical data were obtained from electronic *** variables were compared using Fisher’s exact *** data were presented as median and interquartile *** Mann-Whitney U test was used for *** In total,211 patients were *** mortality rate was 13.7%.Overall,149 patients(70.6%)presented with alkalosis,28 patients(13.3%)had acidosis,and the remaining 34 patients(16.2%)had a normal arterial pondus *** those presenting with acidosis,most had a low apparent strong ion difference(SID)(20 patients,9.5%).Within the group with alkalosis,128 patients(61.0%)had respiratory *** non-survivors were older,had more comorbidities,and had higher Charlson’s and simplified acute physiology score *** did not find severe acid-base imbalance in this *** analyzed Stewart’s variables(effective SID,apparent SID,and strong ion gap and the effect of albumin,lactate,phosphorus,and chloride)were not d

关键词： COVID-19 Physicochemical approach Acid-base status Critically ill patients Acute respiratory syndrome

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Advance in the use of gold nanoparticles in the treatment of neurodegenerative diseases:new perspectives

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Neural Regeneration Research 2021年第12期16卷 2425-2426页

作者： Gustavo de Bem silveira Alexandre Pastoris Muller Ricardo Andrez Machado-de-Ávila paulo Cesar Lock silveira Laboratory of Experimental Pathophysiology Graduate Program in Health SciencesUniversidade do Extremo Sul CatarinenseCriciúmaSCBrazil Programa de Pós Graduação em Farmacologia UFSCFlorianópolisSCBrazil

Various conditions affecting nerve cells and the nervous system due to the loss of neurons and their connecting networks are described under the superordinate phrase“Neurodegenerative diseases”.Such diseases lead to disability due to gradual neuronal death in both the central nervous system and the peripheral nervous *** many of these diseases have unknown causes,sometimes these are due to medical conditions such as alcoholism,a tumor,or a stroke,or other causes which may include genetic mutations,toxins,chemicals,and viruses.

关键词： diseases degenerative treatment

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Static-based early-damage detection using symbolic data analysis and unsupervised learning methods

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Frontiers of Structural and Civil Engineering 2015年第1期9卷 1-16页

作者： Joao Pedro SANTOS Christian CREMONA Andre D. ORCESI paulo silveira Luis CALADO Department of Structures Av. Brasil 101 Lisbon 1700-066 Portugal Technical Center for Bridge Engineering CEREMA B.P. 214 Provins Cedex 77487 France Materials and Structures Department IFSTTAR University Paris-Est 14-20 Boulevard Newton Champs sur Marne Marne la Vallee Cedex2 F-77447 France Department of Civil Engineering Technical University Lisbon Avenida Rovisco Pais Lisbon 1096 Portugal

A large amount of researches and studies have been recently performed by applying statistical and machine learning techniques for vibration-based damage detection. However, the global character inherent to the limited number of modal properties issued from operational modal analysis may be not appropriate for early-damage, which has generally a local character. The present paper aims at detecting this type of damage by using static SHM data and by assuming that early-damage produces dead load redistribution. To achieve this objective a data driven strategy is proposed, consisting of the combination of advanced statistical and machine learning methods such as principal component analysis, symbolic data analysis and cluster analysis. From this analysis it was observed that, under the noise levels measured on site, the proposed strategy is able to automatically detect stiffness reduction in stay cables reaching at least 1%.

关键词： structural health monitoring early-damage detection principal component analysis symbolic data symbolic dissimilarity measures cluster analysis numerical model damage simulations

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Rifaximin on epigenetics and autophagy in animal model of hepatocellular carcinoma secondary to metabolic-dysfunction associated steatotic liver disease

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World Journal of Hepatology 2024年第1期16卷 75-90页

作者： Matheus Truccolo Michalczuk Larisse Longo Melina Belén Keingeski Bruno de Souza Basso Gabriel Tayguara silveira Guerreiro Jessica T Ferrari JoséEduardo Vargas Cláudia P Oliveira Carolina Uribe-Cruz Carlos Thadeu Schmidt Cerski Eduardo Filippi-Chiela Mário ReisÁlvares-da-Silva Division of Gastroenterology Hospital de Clínicas de Porto AlegrePorto Alegre 90035-903Rio Grande do SulBrazil Graduate Program in Gastroenterology and Hepatology Universidade Federal do Rio Grande do SulPorto Alegre 90035-003Rio Grande do SulBrazil Experimental Laboratory of Hepatology and Gastroenterology Hospital de Clínicas de Porto AlegrePorto Alegre 90035-903Rio Grande do SulBrazil Laboratory of Inflammatory and Neoplastic Cells Universidade Federal do ParanáParaná81530900Brazil Department of Gastroenterology(LIM07) Faculdade de Medicina da Universidade de São PauloSão Paulo 01246903Brazil Facultad de Ciencias de la Salud Universidad Católica de las MisionesPosadasMisiones 3300Argentina Unit of Surgical Pathology Hospital de Clinicas de Porto AlegrePorto Alegre 90035-903Rio Grande do SulBrazil Center of Biotechnology Universidade Federal do Rio Grande do SulPorto Alegre 90035-003Rio Grande do SulBrazil Department of Morphological Sciences Universidade Federal do Rio Grande do SulPorto Alegre 90.050-170Rio Grande do SulBrazil Conselho Nacional de Desenvolvimento Científico e Tecnológico(CNPq) Conselho Nacional de Desenvolvimento Científico e Tecnológico(CNPq)ResearcherBrasília 71.605-001Brazil

BACKGROUND Prevalence of hepatocellular carcinoma(HCC)is increasing,especially in patients with metabolic dysfunctionassociated steatotic liver disease(MASLD).AIM To investigate rifaximin(RIF)effects on epigenetic/autophagy markers in *** Adult Sprague-Dawley rats were randomly assigned(n=8,each)and treated from 5-16 wk:Control[standard diet,water plus gavage with vehicle(Veh)],HCC[high-fat choline deficient diet(HFCD),diethylnitrosamine(DEN)in drinking water and Veh gavage],and RIF[HFCD,DEN and RIF(50 mg/kg/d)gavage].Gene expression of epigenetic/autophagy markers and circulating miRNAs were *** All HCC and RIF animals developed metabolic-dysfunction associated steatohepatitis fibrosis,and cirrhosis,but three RIF-group did not develop *** animals who developed HCC with those who did not,miR-122,miR-34a,tubulin alpha-1c(Tuba-1c),metalloproteinases-2(Mmp2),and metalloproteinases-9(Mmp9)were significantly higher in the *** opposite occurred with Becn1,coactivator associated arginine methyltransferase-1(Carm1),enhancer of zeste homolog-2(Ezh2),autophagy-related factor LC3A/B(Map1 Lc3b),and p62/sequestosome-1(p62/SQSTM1)-*** with controls,Map1 Lc3b,Becn1 and Ezh2 were lower in HCC and RIF-groups(P0.05).miR-122 was higher in HCC,and miR-34a in RIF compared to controls(P0.05).CONCLUSION RIF might have a possible beneficial effect on preventing/delaying liver carcinogenesis throu

关键词： Animal model Autophagy Epigenetic Hepatocellular carcinoma Metabolic dysfunction-associated steatotic liver disease Rifaximin

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Concerns about the application of resistance exercise with blood-flow restriction and thrombosis risk in hemodialysis patients

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Journal of Sport and Health Science 2024年第4期13卷 548-558,F0003页

作者： Hugo de Luca Correa Lysleine Alves Deus Dahan da Cunha Nascimento Nicholas Rolnick Rodrigo Vanerson Passos Neves Andrea Lucena Reis Thais Branquinho de Araujo Carmen Tzanno-Martins Fernanda silveira Tavares Luiz Sinesio Silva Neto Claudio Avelino Rodrigues Santos Paolo Lucas Rodrigues-Silva Fernando Honorato Souza Vitoria Marra da Motta Vilalva Mestrinho Rafael Lavarini dos Santos Rosangela Vieira Andrade Jonato Prestes Thiago dos Santos Rosa Post-graduate Program of Physical Education Catholic University of BrasıliaBrasılia 71966-700Brazil The Human Performance Mechanic Lehman CollegeNew YorkNY 10011USA Clinical Group Home Dialysis Center and RenalClass Sao Paulo 01239-040Brazil Department of Medicine Catholic University of BrasıliaBrasılia 71966-700Brazil Faculty of Medicine Federal University of TocantinsTocantins 77001-090Brazil Embrapa Genetic Resources and Biotechnology Brasılia 70770-917Brazil Graduate Program of Genomic Sciences and Biotechnology Brasılia 71966-700Brazil

Background:Hemodialysis(HD) per se is a risk factor for *** the growing body of evidence on blood-flow restriction(BFR) exercise in HD patients,identification of possible risk factors related to the prothrombotic agent D-dimer is required for the safety and feasibility of this training *** aim of the present study was to identify risk factors associated with higher D-dimer levels and to determine the acute effect of resistance exercise(RE) with BFR on this ***:Two hundred and six HD patients volunteered for this study(all with a glomerular filtration rate of 70 years old),and HD ***,RE+BFR significantly increases D-dimer after 4 *** with borderline baseline D-dimer levels(400-490 ng/mL) displayed increased risk of elevating D-dimer over the normal range(≥500 ng/mL).Conclusion:These results identified factors associated with a heightened prothrombotic state and may assist in the screening process for HD patients who wish to undergo RE+BFR.D-dimer and/or other fibrinolysis factors should be assessed at baseline and throughout the protocol as a precautionary measure to maximize safety during RE+BFR.

关键词： Blood-flow restriction Chronic kidney disease Coagulation Hemodialysis Vascular occlusion exercises

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Pramipexole, a dopamine D3/D2 receptor-preferring agonist, attenuates reserpine-induced fibromyalgia-like model in mice

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Neural Regeneration Research 2022年第2期17卷 450-458页

作者： Carlos Pereira Martins Rodrigo Sebben Paes Gabriela Mantovani Baldasso Eduarda Gomes Ferrarini Rahisa Scussel Rubya Pereira Zaccaron Ricardo Andrez Machado-de-Avila paulo Cesar Lock silveira Rafael Cypriano Dutra Laboratory of Autoimmunity and Immunopharmacology Department of Health SciencesCampus AraranguaUniversidade Federal de Santa CatarinaAraranguáSCBrazil Post-Graduate Program of Neuroscience Center of Biological SciencesUniversidade Federal de Santa CatarinaFlorianópolisSCBrazil Laboratory of Experimental Physiopathology Program of Postgraduate in Science of HealthUniversidade do Extremo Sul CatarinenseCriciumaSCBrazil

Fibromyalgia(FM) is a complex pathology described as persistent hyperalgesia including somatic and mood dysfunctions, depression and anxiety. Although the etiology of FM is still unknown, a significant decrease in biogenic amines is a common characteristic in its pathogenesis. Here, our main objective was to investigate the role of dopamine D3/D2 receptor during the reserpine-induced pain in mice. Our results showed that pramipexole(PPX) – a dopaminergic D3/D2 receptor agonist – inhibited mechanical allodynia and thermal sensitivity induced by reserpine. Relevantly, PPX treatment decreased immobility time and increased the number of grooming in the forced swimming test and splash test, respectively. Animals that received PPX remained longer in the open arms than the reserpine group using elevated plusmaze apparatus. The repeated PPX administration, given daily for 4 days, significantly blocked the mechanical and thermal allodynia during FM model, similarly to pregabalin, although it failed to affect the reserpine-induced thermal nociception. Reserpine administration induced significant downregulation of dopamine concentration in the central nervous system, and repeated treatment with PPX restored dopamine levels in the frontal cortex and spinal cord tissues. Moreover, PPX treatment inhibited oxidants production such as DCFH(2′,7′-dichlorodihydrofluorescein) and nitrite, also decreased oxidative damage(carbonyl), and upregulated the activity of superoxide dismutase in the spinal cord. Together, our findings demonstrated the ability of dopamine D3/D2 receptor-preferring agonist in reducing pain and mood dysfunction allied to FM in mice. All experimental protocols were approved by the Universidade Federal de Santa Catarina(UFSC) Ethics Committee(approval No. 2572210218) on May 10, 2018.

关键词： dopamine dopaminergic system fibromyalgia hyperalgesia pain pramipexole reserpine

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