551,283 results match your criteria: "Brazil; Clinical Research in Infectious Diseases[Affiliation]"

Systematic conservation planning (SCP) involves the cost-effective placement and application of management actions to achieve biodiversity conservation objectives. Given the political momentum for greater global nature protection, restoration, and improved management of natural resources articulated in the targets of the Global Biodiversity Framework, assessing the state-of-the-art of SCP is timely. Recent advances in SCP include faster and more exact algorithms and software, inclusion of ecosystem services and multiple facets of biodiversity (e.

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Interaction and cleavage of cell and plasma proteins by the platelet-aggregating serine protease PA-BJ of Bothrops jararaca venom.

Biochimie

January 2025

Laboratory of Applied Toxinology, Center of Toxins, Immune-Response and Cell Signaling (CeTICS), Butantan Institute, São Paulo, Brazil. Electronic address:

PA-BJ is a serine protease present in Bothrops jararaca venom that triggers platelet aggregation and granule secretion by activating the protease-activated receptors PAR-1 and PAR-4, without clotting fibrinogen. These receptors also have a relevant role in endothelial cells, however, the interaction of PA-BJ with other membrane-bound or soluble targets is not known. Here we explored the activity of PA-BJ on endothelial cell receptor, cytoskeleton, and coagulation proteins in vitro, and show the degradation of fibrinogen and protein C, and the limited proteolysis of actin, EPCR, PAR-1, and thrombomodulin.

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Chalcogen dihydrobenzofuran compounds as potential neuroprotective agents: an in vitro and in silico biological investigation.

Biochimie

January 2025

Laboratory of Biochemistry and Molecular Neuropharmacology (LABIONEM), Graduate Program in Biochemistry and Bioprospecting (PPGBBio), Chemical, Pharmaceutical, and Food Sciences Center (CCQFA), Federal University of Pelotas (UFPel), 96010-900 RS, Brazil. Electronic address:

Oxidative stress arises from an imbalance between reactive species (RS) production and the antioxidant defense, increasing the brain susceptibility to neurodegenerative and psychiatric diseases. Besides, changes in the expression or activity of neurotransmitter metabolism enzymes, such as monoamine oxidases (MAO), are also associated with mental disorders, including depression. Considering this, antioxidant and MAO-A activity inhibitory potential of six 2,3-chalcogenodihydrobenzofurans (2,3-DHBF) was investigated through in vitro and in silico tests.

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Transvaginal ultrasound-guided follicle aspiration (TVA) is being performed commonly in clinical equine practice. There is limited information in the literature about the type and incidence of complications related to TVA. We conducted a survey (Study 1), completed by 23 practicing veterinarians, soliciting information about the types and incidence of minor and major complications and of fatalities they had experienced associated with performance of TVA.

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The T22 protocol is an animal model of forced internal desynchronization, in which rats are exposed to an 11:11 light-dark (LD) cycle. This non-invasive protocol induces the dissociation of circadian rhythms in adult rats, making it possible to study the effects of circadian disruption on physiological and behavioral processes such as learning, memory, and emotional responses. However, the effects of circadian dissociation during other developmental stages, such as adolescence, remain unexplored.

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The use of Pleurotus ostreatus by-products for the preparation of a gel-like polysaccharide with bioactive properties.

Int J Biol Macromol

January 2025

Instituto de Pesquisa Pelé Pequeno Príncipe, 80240-020 Curitiba, PR, Brazil; Faculdades Pequeno Príncipe, 80230-020 Curitiba, PR, Brazil. Electronic address:

The mushroom Pleurotus ostreatus is widely produced in Brazil and its stipes are discarded before commercialization. In the present study, this agricultural fungal waste (mushroom stipes), was analyzed by preparing an aqueous extract and obtaining the polysaccharides by ethanol precipitation (POS-extract). The fraction presented 37 % of carbohydrates and small amounts of proteins and phenolic compounds.

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Few studies today address trans-operative analgesia provided by tramadol without local anesthetics for intra-abdominal procedures. The objective of this study was to assess the efficacy of trans-operative analgesia provided by epidurally administered tramadol in cats undergoing elective ovariohysterectomy. For this purpose, 16 healthy queens were randomly assigned to participate in one of two groups: GC, control group, 0.

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Association between ACE (I/D) polymorphism and physical performance in Brazilian handballers.

Int J Sports Med

January 2025

Department of Biophysics and Physiology, Nucleus of Study in Physiology Applied to Performance and Health (NEFADS), Federal University of Piaui, Teresina, Brazil.

This study investigated the association between the ACE (I/D) polymorphism and strength phenotypes in Brazilian male handball players, considering their playing position. A total of 105 male junior handball players and 92 controls were evaluated. The ACE I/D polymorphism was genotyped by conventional PCR followed by electrophoresis in agarose gel.

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The rate of glucose metabolism sets the cell morphology across yeast strains and species.

Curr Biol

January 2025

Molecular Systems Biology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, 9747 AG Groningen, the Netherlands. Electronic address:

Yeasts are a diverse group of unicellular fungi that have developed a wide array of phenotypes and traits over 400 million years of evolution. However, we still lack an understanding of the biological principles governing the range of cell morphologies, metabolic modes, and reproductive strategies yeasts display. In this study, we explored the relationship between cell morphology and metabolism in sixteen yeast strains across eleven species.

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Short-term negative effects of seawater acidification on the rhodolith holobionts metatranscriptome.

Sci Total Environ

January 2025

Laboratório de Microbiologia, Programa de pós-graduação em Ciências Biológicas (Genética), Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, RJ, Brazil. Electronic address:

Rhodolith holobionts are formed by calcareous coralline algae (e.g., Corallinales) and associated microbiomes.

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The Sr/Sr isotope ratio has been widely used as an indicator of provenance and migration of aquatic animals, and has applications in other areas such as in environmental and forensic studies. However, the modeling of the spatial distribution in the Amazon basin is still incipient, preventing large-scale applications. In this study, we present a baseline of the Sr/Sr isotope ratio in surface waters of the Amazon basin to infer the provenance and migration patterns of fish.

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Metabolomics in juvenile idiopathic arthritis: A distinct profile in patients under methotrexate.

Clinics (Sao Paulo)

January 2025

Division of Rheumatology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo, SP, Brazil; Pediatric Rheumatology Unit, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo, SP, Brazil.

The objective of the present study was to evaluate biochemical quantitative metabolites in peripheral blood serum samples of Juvenile Idiopathic Arthritis (JIA) patients and healthy controls. A cross-sectional study included 33 post-pubertal JIA (21 without and 12 with Methotrexate (MTX) women and 28 age-matched healthy controls. Metabolomic analyses based on targeted electrospray ionization tandem mass spectrometry were used to identify possible biochemical pathway modifications in serum from JIA patients.

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Prevalence of dry eye in Brazil: Home survey reveals differences in urban and rural regions.

Clinics (Sao Paulo)

January 2025

Department of Ophthalmology, Otorhinolaryngology, and Head & Neck Surgery, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil. Electronic address:

Purpose: A random home visit search investigated the prevalence and predictors of Dry Eye (DE) symptoms in Brazil.

Methods: Through home visits to 420 urban and 180 rural residences in the countryside of Southeast Brazil, the Dry Eye Disease Short Questionnaire (DEDSQ) was applied to volunteers 40 years and older. The predictive value of the DEDSQ and the risk factors were investigated.

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Pathology of peritonitis in cattle.

J Comp Pathol

January 2025

Setor de Patologia Veterinária, Departamento de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.

Although peritonitis is highly prevalent in cattle, there have been only limited studies on the pathology of this condition. We describe the gross and histological aspects of primary and secondary peritonitis in cattle based on necropsy reports of 46 cases. Twenty-six were female (26/46; 56.

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Bloodstream infection in neonates is a complicated disease and presents a major challenge both in diagnosis and in therapeutic intervention. The focus of the present study was to investigate the incidence, the species distribution and the risk factors associated with mortality of bloodstream infections in a neonatal intensive care unit (NICU) and evaluating the antifungal susceptibility of traditional antifungal drugs and three nanoparticle-based drug delivery systems based on nanoparticles. A total of 458 patients were evaluated, and 9.

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Online ensemble model compression for nonstationary data stream learning.

Neural Netw

January 2025

School of Computer Science, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom.

Learning from data streams that emerge from nonstationary environments has many real-world applications and poses various challenges. A key characteristic of such a task is the varying nature of the underlying data distributions over time (concept drifts). However, the most common type of data stream learning approach are ensemble approaches, which involve the training of multiple base learners.

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This study investigated the effects of thermal pasteurization, thermal pasteurization with additives, and high-intensity ultrasound techniques on the storage of cocoa honey (Theobroma cacao L.) over a 28-day period. Physicochemical analyses revealed significant differences among the treatments, with thermal pasteurization maintaining stability for up to 14 days, pasteurization with additives for up to 28 days, and ultrasound treatment for up to 21 days.

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Objectives: Ensuring aneurysm exclusion while maintaining vessel patency is crucial during intracranial aneurysm clipping. Although digital subtraction angiography (DSA) is the gold standard for intraoperative vascular imaging, some centers have reported using fluorescein sodium video angiography (FNa-VA). However, a synthesis of these findings is still lacking.

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Imaging findings of pulmonary and sellar histoplasmosis.

J Clin Neurosci

January 2025

Department of Radiology, Clínica de Diagnóstico por Imagem (CDPI)/DASA, Avenida das Américas, 4666, 302A, 303, 307, 325, 326, Barra da Tijuca, Rio de Janeiro, RJ Zip Code: 2640-102, Brazil; Department of Radiology, Hospital Pró Cardíaco, United Health Group, Rua General Polidoro, 192, Botafogo, Rio de Janeiro, RJ Zip Code: 22280-003, Brazil.

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Focus on brown dog tick-transmitted Rocky Mountain spotted fever in dogs and people: shared threats and solutions.

J Am Vet Med Assoc

January 2025

3Red de Biología y Conservación de Vertebrados, Instituto de Ecología AC, Veracruz, México.

Rocky Mountain spotted fever (RMSF) kills people and dogs in rural communities throughout the Americas and in urban epidemics in Brazil and Mexico. The companion Currents in One Health by Foley et al, AJVR , March 2025, addresses the urban ecology of this devastating disease across the Americas. Cases acquired from Dermacentor spp ticks are sylvatic and sporadic, in contrast with peridomestic cases from Rhipicephalus sanguineus sensu lato, which relies on dogs as hosts.

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Plasma phosphorylated tau biomarkers open unprecedented opportunities for identifying carriers of Alzheimer's disease pathophysiology in early disease stages using minimally invasive techniques. Plasma p-tau biomarkers are believed to reflect tau phosphorylation and secretion. However, it remains unclear to what extent the magnitude of plasma p-tau abnormalities reflects neuronal network disturbance in the form of cognitive impairment.

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Background: In this phase 3 trial of an investigational maternal respiratory syncytial virus prefusion F protein-based vaccine (RSVPreF3-Mat), a higher rate of preterm birth was observed in the vaccine (6.8%) versus the placebo group (4.9%).

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End-of-life lithium-ion batteries (LIBs) present an opportunity to generate a circular economy through recycling. One of the techniques that can contribute to the purification of leached batteries is electrodialysis. In this work, we present a study of current variation in relation to monovalent (Li), divalent (Ni and Co) and trivalent (Al) cations from the synthetic solution of an NCA-type lithium-ion battery leachate, using electrodialysis membranes (HDX-100 and HDX-200) at three different current densities (12.

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Rationale: Previous studies evaluating the effect of continuous positive airway pressure (CPAP) in patients with obstructive sleep apnea (OSA) on blood pressure (BP) showed variable results. Moreover, several studies recruited patients with normal or controlled BP, and compliance to antihypertensive drugs was not monitored. In addition, very few studies investigated central BP in this scenario.

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Fatuamide A, a Hybrid PKS/NRPS Metallophore from a sp. Marine Cyanobacterium Collected in American Samoa.

J Nat Prod

January 2025

Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, United States.

A structurally novel metabolite, fatuamide A (), was discovered from a laboratory cultured strain of the marine cyanobacterium sp., collected from Faga'itua Bay, American Samoa. A bioassay-guided approach using NCI-H460 human lung cancer cells directed the isolation of fatuamide A, which was obtained from the most cytotoxic fraction.

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