1,521 results match your criteria: "University of Rio de Janeiro UFRJ[Affiliation]"

This systematic review was aimed at addressing the focused question: What is the protective potential of biological agents against alveolar bone resorption during the progression of experimental periodontitis (EP)? The study protocol was registered in the Open Science Framework database (doi:10.17605/OSF.IO/3P2HY).

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The disaccharide trehalose plays a crucial role in multiple facets of the stress biology of yeasts and fungi. Here, we evaluate the properties, cellular and ecophysiological roles, metabolism, and stress-protection mechanisms of trehalose. We integrate disparate sources of knowledge across these topics, and bring new information about the mechanisms by which trehalose stabilises biomacromolecules and how trehalose metabolism is regulated thus giving rise to its diverse roles in fungi including stress protector, carbohydrate reserve, and regulatory/signaling molecule.

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Certified reference materials (CRMs) contribute to the traceability of measurement results to recognized anchor points, ideally to the International System of Units (SI), and consequently, to their comparability and reliability. In the area of veterinary drugs' residues in foods of animal origin, the important role of CRMs must be highlighted, given the problems caused by trade restrictions in some countries. The results of studies concerning the certification of an incurred matrix certified reference material (IMCRM) for the mass fraction of nitrofuran metabolites in chicken muscles are presented in this work.

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Objective: Cervical cancer is the third most common cancer in Brazil. Although rare, its diagnosis during pregnancy represents a great challenge for the medical team and the patient. The objective of this study was to evaluate the maternal and perinatal outcomes of pregnant women who underwent neoadjuvant chemotherapy with carboplatin and paclitaxel for advanced stage cervical cancer.

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Virtual reality: An Emerging Tool for Mental Health.

Trends Psychiatry Psychother

December 2024

Virtual Reality in Mental Health Laboratory (RVSM), Institute of Psychiatry (IPUB), Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil.

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This review systematically explores the emerging perspectives on analytical techniques and machine learning applications in food metabolomics, with a focus on their roles in the era of Industry 4.0. The study emphasizes the utilization of chromatography-mass spectrometry and proton nuclear magnetic resonance spectroscopy as primary tools for metabolic profiling, highlighting their respective strengths and limitations.

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Article Synopsis
  • * The impact of environmental changes, like rising temperatures and pollution, can worsen disease conditions in aquaculture by enhancing pathogen virulence.
  • * New technologies and biotechnological tools, such as probiotics and metagenomics, are being developed to improve sustainability in aquaculture while reducing the need for antibiotics and better understanding disease mechanisms.
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Background: Surgical clipping and endovascular coiling are well-established treatments for acutely ruptured intracranial aneurysms leading to acute subarachnoid hemorrhage (aSAH). However, these modalities have limitations, particularly in cases involving wide-necked, bifurcating, or dissecting aneurysms. Flow diverter (FD) devices, initially used for unruptured aneurysms, have emerged as an alternative treatment for ruptured aneurysms despite concerns about hemorrhagic complications.

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Could digital twins be the next revolution in healthcare?

Eur J Public Health

November 2024

COPPE-Graduate School and Research in Engineering, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.

A Digital Twin (DT) can be understood as a representation of a real asset, a virtual replica of a physical object, process, or even a system. They have been used in managing healthcare facilities, streamlining care processes, personalizing treatments, and enhancing patient recovery. The potential impact of this tool on our society and its well-being is quite significant.

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Article Synopsis
  • Omics techniques were used during the COVID-19 pandemic to enhance our understanding of the virus, find biomarkers for diagnosis and prognosis, and identify new drug targets.
  • The study analyzed saliva samples from both COVID-19 positive and negative volunteers during the Omicron variant's rise, using non-target metabolomics to identify potential biomarkers for screening.
  • The developed model successfully distinguished COVID-19 positive individuals with high rates of sensitivity, specificity, and accuracy, linking the identified salivary signatures to immune responses and suggesting a need for further research on endocrine imbalances in mild cases.
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Effects of intradialytic bicycle ergometer exercise on transcription factors NF-ĸB and Nrf2 in patients with chronic kidney disease: A randomized crossover clinical trial.

J Bodyw Mov Ther

October 2024

Graduate Program in Biological Sciences - Physiology, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil; Graduate Program in Nutrition Sciences, Fluminense Federal University (UFF), Niterói, RJ, Brazil; Graduate Program in Medical Sciences, Fluminense Federal University (UFF), Niterói, RJ, Brazil.

Purpose: To evaluate the effects of an intradialytic aerobic exercise training program on the expression of transcription factors nuclear factor κappa B (NF-κB) and nuclear factor erythroid 2-related factor 2 (Nrf2), related to inflammatory and antioxidant pathways, respectively, in patients with chronic kidney disease (CKD) on hemodialysis.

Methods: This was a longitudinal, randomized clinical trial with a washout period and crossover performed with 33 patients randomized into two groups: Exercise (individualized intradialytic aerobic exercise on an adapted stationary exercise bike) three times per week for three months and control (without exercise). After the washout period (1 month), the exercise group became the control, and the other group performed the exercises for another three months.

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Solitary Fibrous Tumor of the Mandible.

Head Neck Pathol

November 2024

Department of Oral Diagnosis and Pathology, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Av. Professor Rodolpho Paulo Rocco, 325, 1º andar, Rio de Janeiro, 21941- 913, Brazil.

A 41-year-old woman presented with a facial asymmetry in the mental region and a painful, well-circumscribed, tender mass in the right lower buccal vestibule, associated with extensive ill-defined bone rarefaction with subtle cortical bone resorption. Microscopically, a proliferation of bland spindle cells interspersed with collagen fibers and prominent staghorn-like blood vessels was observed. Immunohistochemical analysis revealed strong positivity for CD34, Bcl-2, CD99, and STAT-6, confirming the diagnosis of Solitary Fibrous Tumor (SFT).

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rIDIMS: A novel tool for processing direct-infusion mass spectrometry data.

Talanta

March 2025

BIOINOVAR - Biotechnology Laboratories: Biocatalysis, Bioproducts and Bioenergy, Institute of Microbiology Paulo de Góes, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, 21941-902, Brazil. Electronic address:

Article Synopsis
  • Metabolomics using mass spectrometry (MS) is gaining traction due to its efficiency and minimal sample prep, but a lack of user-friendly applications hinders those without programming skills.
  • To address this issue, rIDIMS is introduced as a browser-based tool that streamlines the workflow for processing MS data, allowing users to easily conduct analyses and generate customizable reports.
  • The tool has been tested in various cases, including coffee bean classification and lipid profiling for health studies, showcasing its potential to enhance reproducibility and reliability in metabolomic research.
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Background: Dementia due to Alzheimer's disease (AD) is the most prevalent neurocognitive disorder in the world and impacts the individual's cognitive functions and functionality in the early stages of the condition. Virtual reality (VR) interventions can assist in non-pharmacological treatment in a more ecological way, positively impacting cognitive abilities. However, there are few studies on VR exclusively involving people with AD in randomized controlled trials.

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The study evaluated the effects of conventional pasteurization and ohmic heating (OH) at different electric fields (12, 16, 20, or 24 V/cm) on probiotic chocolate dairy desserts' physicochemical, microbiological, sensory properties and volatile profiles. Both treatments were analyzed for parameters such as pH, syneresis, cream stability index, rheology, bioactive compounds (total phenolics and antioxidant capacity), and probiotic viability (Lactobacillus acidophilus LA-05) over a 28-day storage period. Ohmic heating at higher electric fields (20 and 24 V/cm) showed comparable results to pasteurization for most parameters, with non-significant differences or even higher values for some.

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Lippia origanoides Kunth (LO, Verbenaceae), commonly known in Brazil as salva-de-marajó, is an aromatic plant native to the Americas. Quilombola women from Oriximiná (Pará State, Brazil) use decoctions and decoction vapors of LO aerial parts orally or in sitz baths to alleviate symptoms of dysmenorrhea. This study aimed to evaluate LO decoctions and essential oils through a chemo-qualitative approach.

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Article Synopsis
  • - Patients with chronic kidney disease (CKD) have elevated levels of trimethylamine N-oxide (TMAO), a harmful substance linked to heart disease, and the study explores how gut microbes, specifically methanogenic archaea, might help reduce TMAO by consuming its precursor, trimethylamine (TMA).
  • - The study involved 25 CKD patients, where TMAO levels were measured and gut microbial DNA was sequenced, revealing high TMAO levels and a connection to archaea, particularly a significant negative correlation with the genus Methanobrevibacter.
  • - This research is pioneering in linking TMAO levels with archaea in CKD patients, highlighting the potential role of specific
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Article Synopsis
  • Cortisol is a crucial hormone involved in various bodily processes, but traditional immunoassays can inaccurately measure it due to low specificity.
  • The study developed and validated advanced LC-MS/MS methods for accurately measuring cortisol in urine and plasma samples, adhering to Brazilian health regulations.
  • Their methods demonstrated high precision and sensitivity, successfully analyzing samples from patients at a major hospital in Rio de Janeiro.
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In general, mercury (Hg) undergoes biomagnification in aquatic systems. The absence of Hg biomagnification in a certain aquatic environment constitutes an exceptional finding and this seems to be the case for Sepetiba Bay, in Rio de Janeiro state (RJ), Brazil. There are three distinct ecological populations of Guiana dolphins in the Sepetiba Bay (SB)-Ilha Grande Bay (IGB) Complex, inhabiting: (1) the inner part of SB; (2) SB entrance; and (3) IGB.

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Relationship between Quality of Life and Swallowing in Hypertensive Individuals with Obstructive Sleep Apnea.

Dysphagia

November 2024

Faculty of Medicine, Department of Internal Medicine, Post graduate Program in Internal Medicine, Federal University of Rio de Janeiro - UFRJ, Rio de Janeiro, Rua Professor Rodolpho Paulo Rocco, 255, 9º andar, sala 9E11, Ilha do Fundão CEP, Rio de Janeiro, RJ, 21941-590, Brazil.

Introduction: Obstructive sleep apnea (OSA) is closely associated with resistant hypertension (RHTN). Individuals with OSA may have sensory and muscular alterations in pharyngolaryngeal structures, potentially resulting in oropharyngeal dysphagia.

Objective: One objective of this study was to assess and compare the quality of life (QoL) and swallowing ability of resistant hypertensive patients with and without OSA.

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Background: Some odontogenic cysts (OCs) and odontogenic tumors (OTs) are infiltrative and often recur, causing bone destruction and tooth loss. In the elderly, in particular, these injuries cause significant morbidity, making rehabilitation difficult and compromising the quality of life of these individuals. Objective: To determine the prevalence and demographic characteristics of OCs, non-odontogenic cysts (NOCs), and OTs diagnosed in an elderly Brazilian population (≥60 years).

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Nano-enhanced benzylpenicillin: Bridging antibacterial action with anti-inflammatory potential against antibiotic-resistant bacteria.

Microbes Infect

November 2024

Brazilian Nuclear Energy Commission, Nuclear Engineering Institute, Laboratory of Nanoradiopharmacy and Synthesis of New Radiopharmaceuticals, Rio de Janeiro, 21941906, RJ, Brazil; Rio de Janeiro State University, Laboratory of Radiopharmacy and Nanoradiopharmaceuticals, Rio de Janeiro, 23070200, RJ, Brazil. Electronic address:

This study investigates the enhancement of benzylpenicillin's antibacterial properties using nanomedicine, specifically by developing benzylpenicillin nanoemulsions. To address the escalating issue of bacterial resistance, we employed the advanced techniques Raman spectroscopy and atomic force microscopy to analyze the nanoemulsions' molecular structure and characteristics. We then evaluated the impact of these nanoemulsions on nitric oxide production by macrophages to deternine their potential to modulate inflammatory responses.

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Phenolic compounds are recognized for their benefits against degenerative diseases. Clinical and nutritional applications are limited by their low solubility, stability, and bioavailability, compromising their efficacy. Natural macromolecules, such as lipids, polysaccharides, and proteins, employed as delivery systems can efficiently overcome these limitations.

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