Publications by authors named "Vladmir Carvalho"

Aims: Night blindness (NB), an important manifestation of VA deficiency, may be associated with the odds of diabetes. The aim of this study was to explore the probable association between NB history and diabetes in Chinese community-dwelling adults.

Methods: This multi-center, cross-sectional study enrolled a total of 5664 participants aged 18-82 years from eight sites in China.

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Article Synopsis
  • Pancreatic stellate cells (PSCs) are important in developing fibrosis in the pancreas and its islets, but their exact role was not fully understood before this study.
  • Researchers used a new technique involving vitamin A in genetically modified mice to trace the fate of PSCs, discovering that these cells contribute significantly (about 65.7%) to myofibroblast formation in pancreatic fibrosis.
  • The study found that while PSCs play a crucial role in pancreatic exocrine fibrosis, their genetic removal improved this condition but not islet fibrosis, highlighting their complex involvement in fibrogenesis in the pancreas.
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Background: Oxidative stress is one of the most critical factors that contribute to the pathogenesis of neuronal damage, including diabetic peripheral neuropathy (DPN). Uric acid is a kind of natural antioxidant that plays a major role in the antioxidant capacity against oxidative stress. Here, we aim to determine the role of serum uric acid (SUA) in the DPN of patients with type 2 diabetes mellitus (T2DM).

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  • * A study on Sprague-Dawley rats showed that exercise significantly reduced islet fibrosis by 68% in a normal diet and 45% in a high-fat diet, which correlated with lower blood glucose levels.
  • * Long-term exercise improved pancreatic islet morphology and reduced inflammatory markers, indicating it may play a crucial role in preventing and treating type 2 diabetes through its anti-inflammatory and anti-fibrotic effects.
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Background: It has been demonstrated that activated islet stellate cells (ISCs) play a critical role in islet fibrogenesis and significantly contribute to the progression of type 2 diabetes mellitus. However, the key molecules responsible for ISCs activation have not yet been determined. This study aimed to identify the potential key genes involved in diabetes-induced activation of ISCs.

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Background: The prognostic significance of podoplanin (PDPN) in tumor cells for cancer patients' survival remains controversial. Therefore, we performed this meta-analysis to clarify the relationship between the podoplanin-positive tumor cells and cancer prognosis.

Method: Eligible studies were identified by searching the Pubmed and EBSCO online databases up to August 2019.

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Aims: Visceral lipid accumulation is involved in a variety of physiological aberrations. In the current study, we aimed to investigate whether lipid accumulation had an impact on glucose reabsorption in the kidney.

Methods: We examined renal lipid content and renal threshold for glucose (RT) of each subject.

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The aim of the present study was to explore the influence of tea consumption on diabetes mellitus in the Chinese population. This multi-centre, cross-sectional study was conducted in eight sites from south, east, north, west and middle regions in China by enrolling 12 017 subjects aged 20-70 years. Socio-demographic and general information was collected by a standardised questionnaire.

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Background: Our previous studies have shown that islet stellate cell (ISC), similar to pancreatic stellate cell (PSC) in phenotype and biological characters, may be responsible for the islet fibrosis in type 2 diabetes. To further identify the differences between PSC and ISC and for better understanding of the physiological function of ISC, we employed genome-wide transcriptional analysis on the PSCs and ISCs of Wistar rats.

Method: PSCs and ISCs from each rat were primarily cultured at the same condition.

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Background: The prevalence of diabetes has been growing rapidly in developing countries. This causes devastating economic burdens and increases demands on the health care system. Therefore, there is an urgent need to find a cost-effective and multi-faceted approach for diabetes care.

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