551,246 results match your criteria: "Brazil; Liverpool School of Tropical Medicine[Affiliation]"

Objective: To compare the sociodemographic and clinical profiles of patients with advanced cancer admitted to a tertiary palliative care unit before and during the COVID-19 pandemic.

Methods: This is an analysis of data from patients receiving care before (10/21/2019 to 03/16/2020) and during (09/23/2020 to 08/26/2021) the COVID-19 pandemic. Sociodemographic and clinical data were evaluated.

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Ariasa iporaensis n. sp. (Hemiptera: Cicadidae: Cicadinae: Fidicinini): An Uncommon Brazilian Dry Season Cicada.

Neotrop Entomol

January 2025

Lab de Biologia, Fisiologia de Insetos, Instituto de Patologia Tropical e Saúde Pública, Univ Federal de Goiás, Goiânia, Goiás, Brazil.

The cicada Ariasa iporaensis n. sp. is described.

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Land-use changes have led to natural habitat loss and fragmentation, favoring the occurrence of dominant bee species in agroecosystems. This has raised concerns on the dominance effects in pollination-dependent crops like passion fruits (Passiflora edulis Sims) in tropical regions. That is because dominant bee species might overlap their foraging time with regular pollinators, potentially impairing crop yield.

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Five new species of Dactylomyia Aldrich (Diptera: Dolichopodidae) are described from Brazil: Dactylomyia bipectinipes sp. nov. (Goiás, Mato Grosso do Sul, and Minas Gerais), D.

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Passion fruit woodiness disease (PWD), caused by cowpea aphid-borne mosaic virus (CABMV), severely damages leaves and fruits, compromising passion fruit production. The dynamics of this infection in Passiflora spp. are still poorly understood.

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Purpose: A recent update of consensus guidelines for the management of Cushing's disease (CD) included indications for medical therapy. However, there is limited evidence regarding their implementation in clinical practice. This study aimed to evaluate current medical therapy approaches by expert pituitary centers through an audit conducted to validate the criteria of Pituitary Tumors Centers of Excellence (PTCOEs) and provide an initial standard of medical care for CD.

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Approximately 20% of paediatric and adolescent/young adult patients with renal tumours are diagnosed with non-Wilms tumour, a broad heterogeneous group of tumours that includes clear-cell sarcoma of the kidney, congenital mesoblastic nephroma, malignant rhabdoid tumour of the kidney, renal-cell carcinoma, renal medullary carcinoma and other rare histologies. The differential diagnosis of these tumours dates back many decades, when these pathologies were identified initially through clinicopathological observation of entities with outcomes that diverged from Wilms tumour, corroborated with immunohistochemistry and molecular cytogenetics and, subsequently, through next-generation sequencing. These advances enabled near-definitive recognition of different tumours and risk stratification of patients.

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Background: Minimally invasive pancreatoduodenectomy has gained widespread acceptance among hepatopancreatobiliary surgeons due to its demonstrated advantages in perioperative outcomes compared to the conventional open approach. This meta-analysis, along with trial sequential analysis, aimed to compare the outcomes of robotic pancreatoduodenectomy and laparoscopic pancreatoduodenectomy based on the current available evidence.

Methods: A systematic search of PubMed, Cochrane, Scopus, and Web of Science was conducted from inception to July 2024.

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Purpose: The number of delivery workers (DW) has grown significantly with the rise of the platform economy. Evidence suggests that the working conditions faced by these workers are precarious, however, less is known about the health implications among workers. This study aims to investigate the prevalence of mental disorders (MD) and occupational factors related to this condition among DW.

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The Casarabe culture (500-1400 CE), spreading over roughly 4,500 km of the monumental mounds region of the Llanos de Moxos, Bolivia, is one of the clearest examples of urbanism in pre-Columbian (pre-1492 CE) Amazonia. It exhibits a four-tier hierarchical settlement pattern, with hundreds of monumental mounds interconnected by canals and causeways. Despite archaeological evidence indicating that maize was cultivated by this society, it is unknown whether it was the staple crop and which type of agricultural farming system was used to support this urban-scale society.

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Pain sensitivity mediates the relationship between empathy for pain and psychopathic traits.

Sci Rep

January 2025

Donders Institute for Brain, Cognition and Behavior, Radboud University, Thomas Van Aquinostraat 4, 6525, Nijmegen, The Netherlands.

Psychopathic traits and antisocial behavior show a well-documented relationship with decreased empathic processing. It has been proposed that a reduced own experience of pain leads to perceiving others' pain as less severe, which potentially facilitates exploitative, aggressive behavior towards others. We evaluated the link between psychopathic traits, experimental pain sensitivity and empathy for pain in a community sample (n = 74).

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Cannabidiol (CBD), a specialized metabolite (phytocannabinoid) abundant in Cannabis sativa, is attracting increasing attention for its alleged health-promoting properties. The present study aimed to investigate the pharmacokinetics of CBD and its primary metabolite, 7-hydroxy-cannabidiol (7-OH-CBD), following a single oral dose of a CBD-rich Cannabis sativa extract, equivalent to 70 mg CBD, in healthy male (n=5) and female (n=6) participants. Using a randomized crossover design, the study evaluated the impact of a standardized high-fat meal compared to fasting on the oral bioavailability of CBD.

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Distinct bacteria display genus and species-specific associations with mycobionts in paramo lichens in Colombia.

FEMS Microbiol Ecol

January 2025

Grupo de Max Planck Tándem en Biología Computacional y Ecología Microbiana, Departamento de Ciencias Biológicas, Universidad de los Andes, Bogotá, Colombia.

Lichens are complex symbiotic systems where fungi interact with an extracellular arrangement of one or more photosynthetic partners and an indeterminate number of other microbes. Recently, specific lichen-microbial community associations have been proposed. In this study, we aimed to characterize the differences in bacteria associated with closely related lichens, under a defined set of environmental conditions in Colombian paramos.

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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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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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