2,591 results match your criteria: "Fluminense Federal University.[Affiliation]"

Background: Malaria, a tropical neglected disease, imposes a significant burden on global health, leading to the loss of thousands of lives annually. Its gold standard treatment is a combination therapy of lumefantrine (LUM) and artemether (ART). Nanotechnology holds significant potential for improving drug bioavailability and potency while reducing adverse effects.

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Petrographic and Petrophysical Characterization of Sandstones from Rio Bonito Formation, Paraná Basin (Southern Brazil).

An Acad Bras Cienc

November 2024

National Observatory, Department of Geophysics, R. Gal. José Cristino, 77, 20921-400 Rio de Janeiro, RJ, Brazil.

This study focuses on the laboratory-scale petrophysical characterization of sandstones from the Rio Bonito Formation (Lower Permian), Paraná Basin, carried out from drill core samples from well PN-14-SC.02 obtained by CPRM-Brazilian Geological Service in the 1980s on the eastern edge of the Basin. This study includes integrating experimental data from routine petrophysics, sedimentary petrography, and nuclear magnetic resonance (NMR) obtained from 6 samples arranged in the normal direction of the stratification, present between 40 and 200 m deep.

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Proposal for a new classification of intrauterine adhesions by sites.

Int J Gynaecol Obstet

November 2024

Division of Minimally Invasive Gynecologic Surgery, Department of Obstetrics and Gynecology, University of Florida College of Medicine, Gainesville, Florida, USA.

The authors propose a new classification of intrauterine adhesions (IUAs) to facilitate understanding for both the gynecologist and the patient, documenting the location and characteristics of the adhesions in a single image. This tool significantly improves surgical planning and patient outcomes in the treatment of intrauterine adhesions. In addition, having a simple and consistent method of describing IUAs will facilitate longitudinal studies tracking the outcomes of various surgical techniques, adhesion barriers and the impact of hormonal treatment.

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Introduction: The COVID-19 pandemic overwhelmed health systems, resulting in a surge in excess deaths. This study clustered countries based on excess mortality to understand their response to the pandemic and the influence of various factors on excess mortality within each cluster.

Materials And Methods: This ecological study is part of the COVID-19 MORtality (C-MOR) Consortium.

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The development of effective biomaterials for tissue regeneration has led to the exploration of blood derivatives such as leucocyte- and platelet-rich fibrin (L-PRF). A novel variant, Albumin-Enriched Platelet-Rich Fibrin (Alb-PRF), has been introduced to improve structural stability and bioactivity, making it a promising candidate for bone regeneration. This study aimed to evaluate Alb-PRF's capacity for cytokine and growth factor release, along with its effects on the proliferation, differentiation, and mineralization of human osteoblasts in vitro.

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Hypertrophic cardiomyopathy (HCM) is a hereditary cardiovascular condition marked by heart muscle thickening, fibrosis, and myocardial disorders. It is often inherited in an autosomal dominant pattern. Symptoms include dyspnea, fatigue, palpitations, dizziness, syncope, and an increased risk of sudden cardiac death (SCD).

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Heart-lung crosstalk in acute respiratory distress syndrome.

Front Physiol

October 2024

Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.

Acute Respiratory Distress Syndrome (ARDS) is initiated by a primary insult that triggers a cascade of pathological events, including damage to lung epithelial and endothelial cells, extracellular matrix disruption, activation of immune cells, and the release of pro-inflammatory mediators. These events lead to increased alveolar-capillary barrier permeability, resulting in interstitial/alveolar edema, collapse, and subsequent hypoxia and hypercapnia. ARDS not only affects the lungs but also significantly impacts the cardiovascular system.

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Post-COVID-19 Condition (PCC) refers to a multisystemic syndrome that persists for months after SARS-CoV-2 infection. Cognitive deficits, fatigue, depression, and anxiety are common manifestations of the condition, but the underlying mechanisms driving these long-lasting neuropsychiatric features are still unclear. We conducted a prospective multi-method investigation of post-hospitalization COVID-19 patients in Rio de Janeiro, Brazil.

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Galectin-3 is an endogenous lectin which binds mainly to β-galactosides on the cell surface and extracellular matrix (ECM) glycoproteins. In the thymus, this lectin is constitutively expressed, being involved in thymocyte adhesion, migration, and death. Galectin-3 has been related to type 1 diabetes, an autoimmune disease characterized by pancreatic β-cell destruction mediated by autoreactive T lymphocytes.

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Genomic characterization of a clonal emergent Minnesota lineage in Brazil reveals the presence of a novel megaplasmid of resistance and virulence.

Appl Environ Microbiol

November 2024

Center for Food Analysis (NAL), Technological Development Support Laboratory (LADETEC), Federal University of Rio de Janeiro (UFRJ), Cidade Universitária, Rio de Janeiro, Brazil.

Article Synopsis
  • * A unique megaplasmid, called pESM, associated with multidrug resistance and virulence has been identified, carrying genes that provide resistance to important antibiotics and enhance tolerance to environmental stressors like mercury.
  • * The study reveals that pESM likely contributes to the emergence and spread of Minnesota, which poses significant risks for human and animal infections due to its high virulence and antibiotic resistance.
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In response to the COVID-19 pandemic, scientific authorities were routinely consulted by mainstream media outlets through interviews, statements and/or supporting images. In this framework, our goal in this study was to analyze the media representation of scientists in Brazil during the first year of this global public health crisis. To this end, we applied a research protocol and, using statistical techniques, quantitatively analyzed newscasts on the country's main TV news program, Jornal Nacional.

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The main factors related to the lack of coverage in Health Information Systems are concentrated in the scarce and incipient training of health professionals regarding the collection and typing of data, as well as the importance of using information. The aim of this study was to analyze the perceptions of primary health care professionals from Brazil about the functioning of the Food and Nutritional Monitoring System (SISVAN). Multicentric qualitative study, carried out with 38 health professionals in Basic Health Units (BHU) in five regions around the country.

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Propolis possesses many bioactive compounds that could modulate the gut microbiota and reduce the production of uremic toxins in patients with chronic kidney disease (CKD) undergoing hemodialysis (HD). This clinical trial aimed to evaluate the effects of propolis on the gut microbiota profile and uremic toxin plasma levels in HD patients. These are secondary analyses from a previous double-blind, randomized clinical study, with 42 patients divided into two groups: the placebo and propolis group received 400 mg of green propolis extract/day for eight weeks.

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Article Synopsis
  • The study aimed to assess the cyclic fatigue strength of rotary endodontic instruments using two different movement techniques: continuous clockwise rotation and clockwise reciprocation with optimum torque reverse (OTR) motion.
  • ProTaper Next X1 and X2 instruments were tested in a standard artificial canal, with the results showing that OTR movement significantly increased the time to fracture compared to continuous rotation.
  • Although both instrument types displayed signs of cyclic fatigue failure, the OTR motion appeared to improve instrument longevity by evenly distributing mechanical stress, leading to a delay in catastrophic failure.
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Background: The Amazon forest produces a variety of fruits with strong biotechnological potential. However, their use in dairy products is restricted.

Scope And Approach: This work aims to carry out a bibliographic survey on the technological applications of select edible Amazonian fruits and their residues in the elaboration and quality of dairy products.

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Objectives: To investigate the association between genetic polymorphisms in suppressor of cytokine signaling-1 (SOCS-1), tumor necrosis factor-⍺ (TNF-α) and its receptors 1 and 2 (TNFRSF1A and TNFRSF1B), receptor activator of nuclear factor kappa-b (RANK), receptor activator of nuclear factor-kappa B ligand (RANKL) and osteoprotegerin (OPG), and persistent apical periodontitis (PAP).

Methods: Patients with pulp necrosis and apical periodontitis at the time of non-surgical root canal treatment were followed up for at least one year. A total of 423 subjects were included, 172 with signs/symptoms of PAP and 251 with apical periodontitis healed.

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To provide an overview of the use of autogenous platelet concentrates (APCs) in periodontal regeneration and to conduct a systematic review (SR) of the treatment outcomes of periodontal intrabony defects by using platelet-rich fibrin (PRF) compared with other commonly utilized modalities. The eligibility criteria comprised randomized controlled trials (RCTs) comparing the clinical outcomes of PRF with that of other modalities. Studies were classified into 21 categories and into five different groups as follows: Group I (1) open flap debridement (OFD) alone versus OFD/PRF, (2) OFD versus Titanium-PRF (T-PRF) Group II, (3) Comparative PRF protocols (PRF vs.

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Article Synopsis
  • - Parkinson's disease (PD) is a progressive neurological condition leading to both motor symptoms (like tremors and stiffness) and non-motor symptoms that affect daily living, with an increasing prevalence, especially in older populations.
  • - A review of treatment options for PD shows an uptick in research since 2000, peaking from 2011 to 2016, with significant contributions from the U.S., China, Canada, and the U.K.
  • - The study used a bibliometric analysis of over 3,700 PD publications to identify key researchers, trends in pharmacological therapies, and the impact of major institutions on current research and treatment methodologies.
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Background: Malaria is an infectious disease caused by the Plasmodium species and is a global burden. When not treated correctly, it can reemerge as a relapse or recrudescence. Malaria relapse cases can contribute to maintaining active transmission chains and can influence the patient to develop severe malaria, potentially leading to hospitalization or death.

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Background And Objectives: Pulp calcification is associated with many factors and triggers, including individual genetic predisposition and orthodontic forces. This study aimed to investigate whether genetic polymorphisms in are associated with a risk of dental pulp calcifications in orthodontic patients.

Materials And Methods: Digital orthopantomography (OPG) and genomic DNA from 132 patients were analyzed in this cross-sectional study.

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Peripheral nerve injuries (PNIs) pose significant clinical challenges due to their complex healing processes and the often incomplete functional recovery. This review and bibliometric analysis aimed to provide a comprehensive overview of advancements in peripheral nerve regeneration research, focusing on trends, influential studies, and emerging areas. By analyzing 2921 publications from the Web of Science Core Collection, key themes such as nerve regeneration, repair, and the critical role of Schwann cells were identified.

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The botulinum toxin (BT) is US Food and Drug Administration-approved for therapeutic applications in different medical conditions. However, BT is not considered an obstructive sleep apnea (OSA) therapy. OSA is characterized by recurrent airway collapse during sleep, leading to intermittent hypoxia, hypercapnia, and arousal.

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Coral microbiomes play crucial roles in holobiont homeostasis and adaptation. The host's ability to populate broad ecological niches and to cope with environmental changes seems to be related to the flexibility of the coral microbiome. By means of high-throughput DNA sequencing we characterized simultaneously both bacterial (16S rRNA) and Symbiodiniaceae (ITS2) communities of four reef-building coral species (Mussismilia braziliensis, Mussismilia harttii, Montastraea cavernosa, and Favia gravida) that differ in geographic distribution and niche specificity.

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Overexpression of Osteopontin-a and Osteopontin-c Splice Variants Are Worse Prognostic Features in Colorectal Cancer.

Diagnostics (Basel)

September 2024

Hemato-Oncology Molecular Program, National Institute of Cancer, 23rd Red Cross Square, 6th Floor, Rio de Janeiro 20230-130, RJ, Brazil.

: Osteopontin (OPN) is a glycoprotein involved in various physiological and pathological processes, and its aberrant expression in cancer cells is closely linked to tumor progression. In colorectal cancer (CRC), OPN is overexpressed, but the roles of its splice variants (OPN-SVs), OPNa, OPNb, and OPNc, are not well understood. This study aimed to characterize the expression patterns of OPN-SVs and their potential diagnostic and prognostic implications in CRC using transcriptomic data deposited in TSVdb and TCGA.

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The digital twin (DT), which involves creating a virtual replica of a physical asset or system, has emerged as a transformative set of tools across various industries. In the oil and gas (O&G) industry, the development of DTs represents a significant evolution in how companies manage complex operations, enhance safety, and optimize decision-making processes. Despite these significant advancements, the underlying tools, technologies, and frameworks for developing DTs in O&G applications remain non-standardized and unfamiliar to many O&G practitioners, highlighting the need for a systematic literature review (SLR) on the topic.

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