Publications by authors named "Guimaraes P"

Article Synopsis
  • Diabetic retinopathy (DR) identification is challenging as it often occurs long after diabetes onset, making early detection crucial for effective management.
  • Researchers investigated using texture analysis of optical coherence tomography (OCT) retinal images to identify early retinal changes in diabetic animals that may not yet be clinically visible.
  • Results indicated that type 1 diabetes led to significant changes in several texture metrics by 4 weeks post-diabetes induction, correlating with other early indicators of retinal damage such as thinning and inflammation, highlighting the potential of texture analysis for early DR detection.
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Background: Sudden cardiac death (SCD) is a major concern in patients with hypertrophic cardiomyopathy (HCM). The American College of Cardiology/American Heart Association (ACC/AHA) and the European Society of Cardiology (ESC) have different guidelines for SCD risk stratification. Their comparative performance in diverse populations remains uncertain.

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Background: The increasing industrialization and hydrocarbon use have led to concerning soil contamination. Oil spills and improper disposal of oily waste pose threats to ecosystems and human health. The recovery of these environments is essential, but separating oily components from soil remains challenging.

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Biofouling in freshwater and marine environments developed on man-made aquatic surfaces causes significant economic losses. Still, this problem is magnified when it comes to invasive species, such as the golden mussel. One of the alternatives to combat it is the use of antifouling solutions; however, the vast majority focus on solutions for the marine environment.

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causes devastating vascular wilt diseases in numerous crop species, resulting in substantial yield losses. The - (FOC) model system enables the identification of meaningful genotype-phenotype correlations and was applied in this study to evaluate the effects of overexpressing an NLR gene () from against pathogen infection. overexpression (OE) lines exhibited enhanced resistance to FOC without any discernible phenotype penalties.

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Carbon dioxide emissions are altering aquatic ecosystems by causing water acidification and temperature increases, and these environments are also facing pesticide contamination. We present a scientometric and systematic map of these impacts in continental aquatic environments, aiming to provide an overview of research investigating the effects of temperature and acidification on pesticide toxicity. Our findings reveal a significant increase in research output on this topic, especially over the past seven years, with the United States leading due to high pesticide use and rigorous environmental monitoring.

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Article Synopsis
  • Mineralocorticoid receptor antagonists (MRA) like spironolactone are effective for heart failure with reduced ejection fraction but are often underused due to hyperkalemia concerns.
  • The REALIZE-K trial tested the effects of sodium zirconium cyclosilicate (SZC) in helping patients with heart failure and hyperkalemia effectively use spironolactone.
  • Results showed that participants who received SZC had significantly better outcomes in terms of maintaining normal potassium levels and continuing on spironolactone compared to those on a placebo.
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Background: Breast asymmetry occurs when there is a discrepancy in the shape, volume, or positioning of the breasts. Various factors, including unequal development of breast buds, endocrine disorders, chest wall deformities, and surgical or posttraumatic sequelae, can contribute to this condition. Although breast asymmetry is common, clinically severe cases are rare and often require surgical correction because of potential postural, aesthetic, and psychological issues.

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Objective: Tofacitinib, an oral Janus kinase inhibitor, has been tested against a placebo in 289 patients with COVID-19 pneumonia. We analyzed the data from the tofacitinib- and placebo-treated patient cohorts to evaluate the laboratory profiles between baseline and day 7.

Methods: We performed post hoc analyses on the following laboratory tests over time during the first 7 days after randomization: hemoglobin, leukocytes, neutrophils, lymphocytes, platelets, alanine aminotransferase, and aspartate aminotransferase.

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  • The study investigates the occurrence of freshwater jellyfish, specifically Craspedacusta sowerbii, in Misiones, Argentina, and its potential to cause envenomation in humans.
  • It documents cases of skin lesions that coincided with the jellyfish's presence and analyzes its toxicological properties, revealing the presence of harmful enzymes and toxins.
  • This research not only confirms the jellyfish's presence in northeastern Argentina but also aids health professionals in diagnosing and managing jellyfish-related injuries.
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To effectively reduce the health impact of coronavirus disease (COVID-19), it is essential to adopt comprehensive strategies to protect individuals from severe acute respiratory syndrome. In that sense, much effort has been devoted to the discovery and repurposing of effective antiviral and anti-inflammatory molecules. The endogenous peptide angiotensin-(1-7) [Ang-(1-7)] has been recently proposed as a promising anti-inflammatory agent to control respiratory infections.

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The E3 ubiquitin ligase Smurf1 catalyzes the ubiquitination and proteasomal degradation of several protein substrates related to inflammatory responses and antiviral signaling. This study investigated the role of Smurf1 in modulating inflammation induced by Betacoronavirus infection. Bone marrow-derived macrophages (BMDMs) from C57BL/6 (wild-type) or Smurf1-deficient () mice were infected with MHV-A59 to evaluate the inflammatory response in vitro.

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The aim of this study was to compare the food consumption of the population of Coari, Amazonas State, Brazil, according to the NOVA Classification, during the hydrological phases of drought and flooding of the Amazon rivers. An epidemiological, population-based, cross-sectional study was carried out. The sample consisted of 457 adult individuals.

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  • Visceral leishmaniasis is a serious and potentially fatal disease in New World countries, with limited treatment options and no effective preventative measures.
  • Researchers investigated the use of letrozole, a breast cancer drug known as an aromatase inhibitor, for its potential to treat leishmaniasis by targeting both the parasite and the immune response.
  • In their studies, letrozole showed effectiveness in reducing parasite load and improving immune responses in both human cell models and murine infection models, suggesting it could be a promising treatment for visceral leishmaniasis in humans.*
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  • There’s a debate about how long patients with heart problems should take two types of medicine together, called dual antiplatelet therapy (DAPT).
  • Researchers wanted to see how effective and safe different lengths of DAPT are for patients who have serious heart issues and receive a special procedure to help their hearts.
  • They found that taking DAPT for just 1 month followed by another medicine might reduce serious bleeding, but didn't change the number of heart problems compared to taking DAPT for 12 months.
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  • The study examines how the Renin Angiotensin System (RAS) is involved in mild traumatic brain injury (mTBI), focusing on changes in RAS components in an animal model.
  • It found increased levels of certain RAS components in specific brain regions after injury, alongside changes in receptor expression over time.
  • Treatment with RAS-blocking medications improved motor activity and reduced anxiety in mTBI mice, suggesting potential therapeutic options for managing mTBI symptoms.
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Here we describe and illustrate and two new species of the Melastomateae tribe from Serra da Canastra National Park, Minas Gerais, Brazil. We also provide an updated identification key for the members of the tribe that occur in this Protected Area. has coriaceous leaves, broadly ovate to orbicular leaf blade, entire and adpressed-strigose margin, 11-17 basal acrodromous veins, and flowers with white petals.

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In ecological networks, cohesive groups of species may shape the evolution of interactions, serving as coevolutionary units. Ranging across network scales, from motifs to isolated components, elucidating which cohesive groups are more determinant for coevolution remains a challenge in ecology. We address this challenge by integrating 376 empirical mutualistic and antagonistic networks and coevolutionary models.

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The populations of the loggerhead turtles, present four main D-loop mitochondrial haplogroups that are distributed across the Indo-Pacific, Mediterranean, and Atlantic oceans. The Southwestern Atlantic (SWA) is one of the Regional Management Units (RMUs) of loggerheads, characterized by unique haplotypes, high nest density, and distinct life history traits. Detecting new D-loop haplogroups is important, particularly endemic ones, as they can enhance our understanding of their life history within the RMUs and contribute to the resolution of mixed stock analysis.

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Objective: The aim of this study was to investigate the contextual factors associated with the quality of life (QOL) of Brazilian children aged 0-12 years during the strict period of social isolation.

Methods: This observational cross-sectional study was conducted between July and September 2020 using an online questionnaire on QOL-related family factors and the Pediatric Quality of Life Inventory (PedsQL™). Results were analyzed by multinomial logistic regression analysis.

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The pharmaceutical industry is increasingly embracing laboratory automation to enhance experimental efficiency and operational resilience, particularly through the integration of automated liquid handlers (ALHs). This paper explores the integration of the low-cost Opentrons OT-2 liquid handling robot with F. Hoffmann-La Roche AG's in-house workflow orchestration software, AutoLab, to overcome barriers to lab automation.

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Background: Heart transplantation (HT) recipients are at risk for urgent rehospitalizations following discharge. However, data on prevalence, risk factors and clinical outcomes associated with post-HT rehospitalization are limited.

Methods: This study aims to describe patterns of urgent rehospitalizations in HT recipients at a cardiology reference center in Brazil.

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Therapeutic cancer vaccines have been considered in recent decades as important immunotherapeutic strategies capable of leading to tumor regression. In the development of these vaccines, the identification of neoepitopes plays a critical role, and different computational methods have been proposed and employed to direct and accelerate this process. In this context, this review identified and systematically analyzed the most recent studies published in the literature on the computational prediction of epitopes for the development of therapeutic vaccines, outlining critical steps, along with the associated program's strengths and limitations.

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Purpose: This study evaluated the prevalence of complications in the postoperative period of esophagogastric oncological surgeries.

Methods: We conducted a retrospective cross-sectional study, adhering to the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) guidelines. The study size implied 163 patients who underwent surgical treatment for esophageal and gastric cancer and experienced postoperative complications between January 2018 and December 2022.

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