549,431 results match your criteria: "Brazil; Center of Toxins[Affiliation]"

Objective: Increased intracranial pressure (ICP) can worsen the clinical condition of traumatic brain injury (TBI) patients. One non-invasive and easily bedside-performed technique to estimate ICP is ultrasonographic measurement of optic nerve sheath diameter (ONSD). This study aimed to analyze ONSD and correlate it with ICP values obtained by intraparenchymal monitoring to establish the ONSD threshold value for elevated ICP and reference range of ONSD in severe TBI patients.

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Oral Administration of [F]MC225 for Quantification of P-glycoprotein Function: A Feasibility Study.

Mol Imaging Biol

January 2025

Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.

Purpose: This preclinical study explored the feasibility of assessing P-glycoprotein (P-gp) function in both brain and gastrointestinal (GI) tract of rats using positron emission tomography (PET) following oral administration of [F]MC225. Different oral administration protocols were evaluated, and radioactivity uptake was compared with uptake following intravenous administration.

Procedures: Twelve male Wistar rats were divided into four groups and subjected to intravenous or oral [F]MC225 administration protocols: G (intravenous route), G (oral administration without fasting), G (oral administration with fasting), and G (oral administration with fasting following administration of the P-gp inhibitor tariquidar).

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Zinc is an essential metal to living organisms, including corals and their symbiotic microalgae (Symbiodiniaceae). Both Zn(II) deprivation and overload are capable of leading to dysfunctional metabolism, coral bleaching, and even organism death. The present work investigated the effects of chemically defined Zn species (free Zn, ZnO nanoparticles, and the complexes Zn-histidinate and Zn-EDTA) over the growth of the dinoflagellates Symbiodinium microadriaticum, Breviolum minutum, and Effrenium voratum, and on the trypsin-like proteolytic activity of the hydrocoral Millepora alcicornis.

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Objectives: This study aimed to define handgrip strength (HGS) cutoff points to predict 1-year mortality in adult patients with liver cirrhosis.

Methods: This is an analysis of cohort databases from four reference centers in Brazil. Inpatients or outpatients with cirrhosis and aged ≥18 years were included.

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Objective: Titanium surface modifications improve osseointegration in dental and orthopedic implants. However, soft tissue cells can also reach the implant surface in immediate loading protocols. While previous research focused on osteogenic cells, the early response of soft tissue cells still needs to be better understood.

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Basal ganglia hemorrhage (BGH) is a prevalent site for intracerebral hemorrhage. Although neuroendoscopy (NE) surgery has emerged as a less invasive alternative to craniotomy (CT), the optimal surgical method remains debatable. This systematic review and meta-analysis aimed to compare the efficacy and safety of NE versus CT in the management of BGH.

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Gold-based (Au) nanostructures are efficient catalysts for CO oxidation, hydrogen evolution (HER), and oxygen evolution (OER) reactions, but stabilizing them on graphene (Gr) is challenging due to weak affinity from delocalized [Formula: see text] carbon orbitals. This study investigates forming metal alloys to enhance stability and catalytic performance of Au-based nanocatalysts. Using ab initio density functional theory, we characterize [Formula: see text] sub-nanoclusters (M = Ni, Pd, Pt, Cu, and Ag) with atomicities [Formula: see text], both in gas-phase and supported on Gr.

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Characterizing the dynamics of microbial community succession in the infant gut microbiome is crucial for understanding child health and development, but no normative model currently exists. Here, we estimate child age using gut microbial taxonomic relative abundances from metagenomes, with high temporal resolution (±3 months) for the first 1.5 years of life.

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Behavioral and Electrophysiological Assessment of Central Auditory Processing in Individuals with Sickle Cell Disease.

Pediatr Blood Cancer

January 2025

Department of Audiology and Speech Therapy, Universidade Federal de São Paulo, Sao Paulo, Brazil.

Introduction: Sickle cell anemia has a genetic origin characterized by an autosomal recessive inheritance pattern. The nervous system may be subject to vaso-occlusion and, consequently, affect the proper functioning of the central portion of hearing.

Objective: To assess central auditory skills and analyze short- and long-latency auditory evoked potentials in children with sickle cell disease.

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Expert Opinion on Multiple Myeloma Treatment in Brazil in the Bispecific Antibody Era.

Clin Lymphoma Myeloma Leuk

December 2024

Universidade Federal do Rio de Janeiro -UFRJ, Rio de Janeiro, Brazil; Instituto Americas de Ensino, Pesquisa e Inovação, Rio de Janeiro, Brazil.

Multiple myeloma treatment has evolved rapidly with the development of novel targeted therapies. The paper outlines multiple myeloma epidemiology, current treatments, and recent advances, highlighting the role of bispecific antibodies. Brazilian authorities have approved 3 bispecific antibodies (teclistamab, elranatamab, and talquetamab) for relapsed/refractory multiple myeloma patients who have received at least three prior therapies.

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Male androgenetic alopecia.

An Bras Dermatol

January 2025

Department of Dermatology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil.

Male androgenetic alopecia (MAA) is quite common and worsens with age, with a significant impact on quality of life, and is increasingly a reason for consultation with a dermatologist. The etiopathogenesis of MAA is multifactorial and genetic and hormonal influences stand out. MAA starts with the process of follicular miniaturization in diverse phenotypic patterns.

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Statement Of Problem: Digital surgical guides improve precision by detailing the direction, position, and angle of implants, which reduces surgery time and complications. A bibliometric analysis of guided surgery in implant dentistry is lacking.

Purpose: The aim of this metrics-based analysis was to analyze the trends and key characteristics of articles related to guided surgery in implant dentistry.

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Faced with the increased frequency of zoonotic spillover in recent decades, emerging vector-borne diseases from nonhuman primates pose a significant threat to global public health. Understanding transmission dynamics driven by arthropod vectors between wildlife populations is critical for surveillance, modeling, and mitigation. Elevated canopy-level sampling is a valuable approach for elucidating vector behavior and sylvatic transmission.

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Objectives: To characterize two experimental zirconia bilayer materials compared to their monolithic controls, before and after hydrothermal aging.

Methods: Commercial zirconia powders were utilized to fabricate two bilayer materials: 3Y-TZP+ 5Y-PSZ (3Y+5Y/BI) and 4Y-PSZ+ 5Y-PSZ (4Y+5Y/BI), alongside control groups 3Y-TZP (3Y/C), 4Y-PSZ (4Y/C), and 5Y-PSZ (5Y/C). Compacted specimens were sintered (1550 °C- 2 h, 3 °C/min), and half of them underwent hydrothermal aging (134 °C-20h, 2.

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Removal of the buccal fat pad can be considered safe as long as there is a detailed analysis of anatomical landmarks. The objective of this study was to estimate the prevalence of intra- and postoperative complications resulting from buccal fat pad removal through a systematic review. The search strategy involved observational and/or interventional studies in humans that included at least one case of buccal fat pad removal with a description of the surgery, postoperative progress, and complications.

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Aims: To map interventions in the sexuality of men with stomas.

Design: Scoping review, following JBI and PRISMA-ScR guidelines to report results.

Methods: Databases consulted were PubMed, via National Library of Medicine, Latin American and Caribbean Health Sciences Literature, Web of Science, Scopus, Embase, Scientific Electronic Library Online, Brazilian Electronic Library of Thesis and Dissertations, CAPES Catalogue of Thesis and Dissertations and Open Access Scientific Repository of Portugal.

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Aims: This study evaluated the phenotypic and genotypic traits of mcr-1.1-harboring Escherichia coli isolates from chickens, pigs, humans, and farm environments. The resistome and the mobile genetic elements associated with the spread of mcr-1.

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We compared performing preacher and incline biceps curls on changes in elbow flexors muscle size and strength. This was a between-group repeated measures randomized trial. Sixty-three young women performed preacher biceps curl (PC, n = 30) or incline biceps curl (IC, n = 33) for 8 weeks, twice a week.

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Educational Strategies for Teaching Metabolic Profiles Across Three Endurance Training Zones.

Adv Physiol Educ

January 2025

Department of Biochemistry and Tissue Biology, Institute of Biology, State University of Campinas, Campinas, Brazil.

This article explores an innovative educational approach using a metabolic board designed to enhance understanding of muscle metabolism across three endurance training zones: Z1 (light intensity), Z2 (moderate intensity), and Z3 (intense/severe intensity). The aerobic threshold marks the transition from light to moderate domains, and the anaerobic threshold separates moderate from intense domains, with both thresholds adapting to training. Exercises within each training zone elicit specific adaptive responses through distinct signaling pathways, but the metabolic profile induced remains relatively constant across these intensity domains.

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This study aimed to develop patches containing quercetin-loaded microcapsules and to evaluate their in vitro and in vivo safety and efficacy in preclinical surveys. A set of in vitro experiments evidenced the virucidal activity of quercetin against the HSV-1-KOS (sensitive to acyclovir) and HSV-1-AR (resistant to acyclovir) strains, with improved outcomes upon the first. The patches presented a homogeneous aspect, were easily handled, had a suitable bioadhesion, and possessed mechanical properties of soft and weak material, besides a pH compatible with human skin.

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This study aimed to investigate the impact of adding aroeira leaf extract (Schinus terebinthifolius Raddi) to a yam starch film matrix, focusing on the development of potentially active films and the evaluation of their physicochemical, mechanical, optical, and antioxidant properties. Films were produced using the casting method with varying extract concentrations (0, 3, 6, 12, and 15 %), yam starch (2 %), and glycerol (1 %). The antioxidant properties were analyzed by determining the total phenolic content, 2,2-Diphenyl-1-Picrylhydrazyl (DPPH) radical scavenging, ferric reducing power, and 2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical elimination, which revealed a significant increase in antioxidant properties as the extract concentration increased.

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The PWWP domain is a conserved motif unique to eukaryotes, playing a critical role in various cellular processes. Proteins containing the PWWP domain are typically found in chromatin, where they bind to DNA and histones in nucleosomes, facilitating chromatin-associated functions. Among these proteins, PWWP-domain containing proteins 2A and 2B (PWWP2A and PWWP2B), identified during the H2A interactome analysis, are DNA methyltransferase-related proteins, that are structurally disordered, except for their PWWP domain.

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Cp40-mediated complement C3 inhibition dampens inflammasome activation and inflammatory mediators storm induced by Bitis arietans venom.

Int Immunopharmacol

January 2025

Immunochemistry Laboratory, Butantan Institute, São Paulo, SP, Brazil; Center of Toxins, Cell Signaling and Immune Response (CeTICS), CEPID, FAPESP, Brazil. Electronic address:

The complement system plays a crucial role in various pathophysiological conditions, including snake envenomation. In this study, we investigated the effects of Bitis arietans venom on the complement system using an ex vivo human whole blood model. Our findings demonstrate that B.

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