Publications by authors named "Ana C Simoes E Silva"

Article Synopsis
  • 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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Article Synopsis
  • Obesity is a complex condition linked to excessive fat accumulation, especially in the abdominal area, which can harm health by increasing inflammation.
  • This study focused on 12 sedentary, overweight, and obese young men and assessed the effects of one strength training session on their blood levels of resistin and leptin, two important adipokines.
  • Results showed that the strength training significantly decreased resistin levels one hour post-exercise, while leptin levels remained unchanged, suggesting that exercise may help reduce inflammation and improve insulin resistance in overweight and obese individuals.
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Hepatic encephalopathy (HE) is a neuropsychiatric syndrome with a wide spectrum of cognitive deficits, motor impairment, and psychiatric disturbances resulting from liver damage. The cytokine TNF has been considered the main cytokine in the development and progression of HE, with a pivotal role in the initiation and amplification of the inflammatory cascade. The aim of the present study was to evaluate the involvement of TNF type 1 receptor (TNFR1) in locomotor deficits and in the levels of TNF, IFN-γ, IL-6, IL-10, IL-12p70, CCL2, CX3CL1 and BDNF from the frontal cortex and hippocampus of TNFR1 knockout mice (TNFR1) mice with HE induced by thioacetamide.

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Objective: To provide a comprehensive overview of the epidemiologic characteristics, outcomes, and risk factors of COVID-19-related deaths in children and adolescents in Brazil.

Study Design: We conducted a population-based, retrospective cohort study that included all patients aged <18 years with laboratory-confirmed, symptomatic SARS-CoV-2 infection as registered in official Brazilian national surveillance systems for COVID-19 between February 2020 and February 2023. The primary outcome was COVID-19-related deaths.

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Aim: To evaluate the effects of systematic rehabilitation on both the neuropsychomotor development, and on the peripheral response from immunological and neuroplastic mediators in children with cerebral palsy.

Methods: This is a prospective cohort study with 90 children with cerebral palsy at 18 months of age. Sixty children received rehabilitation for 6 months, and they were compared to 30 children that were placed in the waiting list.

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ChAdOx1-S is a viral vector vaccine developed by AstraZeneca. We aimed to assess the effectiveness of 1 and 2 doses of the ChAdOx1-S vaccine in reducing COVID-19-related in-hospital mortality in individuals with schizophrenia. This is a retrospective cohort study using a nationwide hospital database in Brazil.

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Acute leukemias (ALs) are the most common cancers in pediatric population. There are two types of ALs: acute lymphoblastic leukemia (ALL) and acute myeloid leukemia (AML). Some studies suggest that the Renin Angiotensin System (RAS) has a role in ALs.

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The Prune-Belly (Eagle-Barrett) syndrome (PBS) is a congenital and genetically heterogeneous disease, more prevalent in males, defined by the clinical triad (1) deficiency of abdominal muscles, (2) bilateral cryptorchidism, and (3) urinary tract abnormalities. The abdomen of an infant with PBS has a typical appearance, similar to the aspect of a prune, which gives it its name. Although the etiology of this disorder is still unknown, numerous theories, mutations, and genetic disturbances have been proposed to explain the origin of PBS.

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Background: The outbreak of the COVID-19 pandemic has had a profound impact on the circulation of seasonal respiratory viruses. This study aimed to compare the outcomes of SARS-CoV-2 and seasonal viruses in adults hospitalized with severe acute respiratory infection during the COVID-19 pandemic.

Methods: This population-based cohort study included patients aged >18 years hospitalized for severe acute respiratory infection in Brazil between February 2020 and February 2023.

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Acute kidney injury (AKI) following surgery with cardiopulmonary bypass (CPB-AKI) is common in pediatrics. Urinary liver-type fatty acid binding protein (uL-FABP) increases in some kidney diseases and may indicate CPB-AKI earlier than current methods. The aim of this systematic review with meta-analysis was to evaluate the potential role of uL-FABP in the early diagnosis and prediction of CPB-AKI.

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Background And Objectives: We aimed to analyze the study designs, modeling approaches, and performance evaluation metrics in studies using machine learning techniques to develop clinical prediction models for children and adolescents with COVID-19.

Methods: We searched four databases for articles published between 01/01/2020 and 10/25/2023, describing the development of multivariable prediction models using any machine learning technique for predicting several outcomes in children and adolescents who had COVID-19.

Results: We included ten articles, six (60 % [95 % confidence interval (CI) 0.

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Background: IgA nephropathy (IgAN) is a common primary glomerular disease. The O-glycosylation status of IgA1 plays a crucial role in disease pathophysiology. The level of poorly-O-galactosylated IgA1, or galactose-deficient IgA1 (Gd-IgA1), has also been identified as a potential biomarker in IgAN.

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Background: Oseltamivir is a low-cost antiviral agent that could support or complement treatment of COVID-19. This study assessed whether oseltamivir is effective in reducing COVID-19-related mortality.

Methods: This retrospective cohort study evaluated real-world data from a nationwide database of hospitalisation due to severe acute respiratory syndrome in Brazil.

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Background: The impact of treatments, suppressing the immune system, persistent hyperparathyroidism, and other risk factors on mineral and bone disorder (MBD) after kidney transplantation is well-known. However, there is limited knowledge about their effect on bone metabolism biomarkers. This study aimed to investigate the influence of kidney transplant on these markers, comparing them to patients undergoing hemodialysis and healthy individuals.

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Introduction: Preeclampsia (PE) is a highly relevant pregnancy-related disorder. An early and accurate diagnosis is crucial to prevent major maternal and neonatal complications and mortality. Due to the association of kidney dysfunction with the pathophysiology of the disease, urine samples have the potential to provide biomarkers for PE prediction, being minimally invasive and easy to perform.

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Background And Objectives: Understanding how severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) interacts with other respiratory viruses is crucial for developing effective public health strategies in the postpandemic era. This study aimed to compare the outcomes of SARS-CoV-2 and seasonal viruses in children and adolescents hospitalized with severe acute respiratory infection (SARI).

Methods: This population-based, retrospective cohort study included children and adolescents hospitalized with SARI from February 2020 to February 2023 in Brazil.

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Article Synopsis
  • Sotagliflozin, a medication for type 2 diabetes, was evaluated for its effects on patients with type 2 diabetes and chronic kidney disease through a systematic analysis of clinical trials.
  • The study showed that Sotagliflozin significantly reduced HbA1c levels and body weight compared to a placebo, with over 11,000 patients followed for about 16 months.
  • However, it also raised concerns, as patients experienced more side effects like reduced kidney function, genital infections, diarrhea, and volume depletion, indicating a need for careful consideration before use.
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African Americans have a significantly higher risk of developing chronic kidney disease, especially focal segmental glomerulosclerosis -, than European Americans. Two coding variants (G1 and G2) in the APOL1 gene play a major role in this disparity. While 13% of African Americans carry the high-risk recessive genotypes, only a fraction of these individuals develops FSGS or kidney failure, indicating the involvement of additional disease modifiers.

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Objective: Enuresis is associated with attentional and emotional comorbidities in 20 to 30 % of cases. The Short Screening Instrument for Psychological Problems in Enuresis (SSIPPE) is a questionnaire that allows the initial screening of these comorbidities. This study aimed to translate, culturally adapt, and validate the SSIPPE for Brazilian children and adolescents (SSIPPE-Br).

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The pathophysiology of post-traumatic brain injury (TBI) behavioral and cognitive changes is not fully understood, especially in its mild presentation. We designed a weight drop TBI model in mice to investigate the role of neuroinflammation in behavioral and cognitive sequelae following mild TBI. C57BL/6 mice displayed depressive-like behavior at 72 h after mild TBI compared with controls, as indicated by a decrease in the latency to first immobility and climbing time in the forced swim test.

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Article Synopsis
  • - Lowe syndrome (LS) is a rare genetic disorder that affects various body systems, including the kidneys, eyes, and nervous system, and is observed in about 1 in 500,000 individuals, predominantly males.
  • - A 25-year-old Mexican male with LS underwent diagnosis due to multiple radiolucent lesions detected in his jaw, which were confirmed as odontogenic keratocysts (OKC) after biopsy and analysis.
  • - This case represents the first documented occurrence of multiple OKCs in a patient with LS, highlighting a need for more research on associated oral conditions, as well as a follow-up indicating positive bone healing after treatment.
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