JOSE TADEU STEFANO
Projetos de Pesquisa
Unidades Organizacionais
LIM/07 - Laboratório de Gastroenterologia Clínica e Experimental, Hospital das Clínicas, Faculdade de Medicina
5 resultados
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Agora exibindo 1 - 5 de 5
- Ability of a Combined FIB4/miRNA181a Score to Predict Significant Liver Fibrosis in NAFLD Patients(2021) LIMA, Rodrigo Vieira Costa; STEFANO, Jose Tadeu; MALTA, Fernanda de Mello; PINHO, Joao Renato Rebello; CARRILHO, Flair Jose; ARRESE, Marco; OLIVEIRA, Claudia P.Liver biopsy is the gold standard for assessing fibrosis, but there is a need to seek non-invasive biomarkers for this purpose. The aim of this study was to evaluate the correlation between the serum levels of the microRNAs miR-21, miR-29a, miR-122, miR-155 and miR-181a and the phenotypic expression of NAFLD. A cross-sectional study was carried out on 108 NAFLD patients diagnosed by liver biopsy. FIB-4 and NAFLD fibrosis scores were calculated. The comparison between the distributions of microRNA values according to the presence or absence of histological fibrosis (F2-F4) was performed. A multivariate logistic regression analysis was performed to build a score for predicting fibrosis using FIB-4 and Ln (miR-181a) as independent variables. Only miR-181a showed a statistical difference between patients with significant liver fibrosis (>F2) and those without (F0-F1) (p = 0.017). FIB-4 revealed an AUC on the ROC curve of 0.667 to predict clinically significant fibrosis (F2-F4). When assessed using the score in association with Ln (miR-181a), there was an improvement in the ROC curve, with an AUC of 0.71. miR-181a can be used as a non-invasive method of predicting fibrosis in NAFLD, and an association with FIB-4 has the potential to increase the accuracy of each method alone.
- Fatty Pancreas: Disease or Finding?(2021) SILVA, Lucas de Lucena Simoes e; FERNANDES, Matheus Santos de Sousa; LIMA, Eline Autran de; STEFANO, Jose Tadeu; OLIVEIRA, Claudia P.; JUKEMURA, JoseDespite a growing number of investigative studies on pancreatic fat deposition, there remains no clear indication regarding the clinical relevance of fat infiltration in the pancreas, also called fatty pancreas (FP). An individual's body weight is correlated with their pancreatic weight. Moreover, lipid infiltration causes disorders that compromise not only morphology but also metabolic functions. Fat infiltration leads to insulin resistance, type II diabetes mellitus, and pancreatic cancer; however, knowledge about pancreatic fat content and aspects related to the clinical profile remains unclear in the literature. The present review describes the current knowledge of FP, including its pathophysiology and clinical implications, as well as lifestyle changes in FP.
conferenceObject ASSOCIATION BETWEEN PNPLA3 AND TM6SF2 GENE POLYMORPHISMS AND GENETIC ANCESTRY IN PATIENTS WITH NON-ALCOHOLIC FATTY LIVER DISEASE FROM A HIGHLY ADMIXED BRAZILIAN POPULATION(2021) CAVALCANTE, Lourianne Nascimento; LYRA, Andre; STEFANO, Jose Tadeu; MAZO, Daniel; PORTO, Jun; REIS, Rui Manuel; LONGATTO FILHO, Adhemar; CARRILHO, Flair Jose; ALVES, Venancio A. F.; OLIVEIRA, Claudia P. M. S.- Usefulness of collagen type IV in the detection of significant liver fibrosis in nonalcoholic fatty liver disease(2021) STEFANO, Jose Tadeu; GUEDES, Laura Vilar; SOUZA, Arthur Alencar Arrais de; VANNI, Denise Siqueira; ALVES, Venancio Avancini Ferreira; CARRILHO, Flair Jose; LARGURA, Alvaro; ARRESE, Marco; OLIVEIRA, Claudia P.Introduction/aims: Liver fibrosis assessment is a key issue in the evaluation of nonalcoholic fatty liver disease (NAFLD) patients. In the present study, we aimed to validate a noninvasive marker panel to assess significant and advanced fibrosis in these patients. Method: 126 biopsy-proven NAFLD patients were included. NAFLD diagnosis was based on histological criteria. Fibrosis stages were determined according to NASH-Clinical Research Network criteria. Clinical and laboratorial data were collected during the interval of three months before or after liver biopsy. Histological fibrosis stages were classified as significant fibrosis (F2-F4) and advanced fibrosis (F3-F4). Five serum biomarkers [hyaluronic acid (HA), collagen type IV (cIV), procollagen type III (PC III), laminin (LN) and cholylglycine (CG)] were assessed by chemiluminescence immunoassays. Results: Most patients were female (61.61%), mean age: 55.7 +/- 9.13 years old and mean BMI was 32.1 +/- 5.9 kg/m(2). Prevalence of diabetes, dyslipidemia, arterial hypertension, and metabolic syndrome was 68.75%, 82.29%, 63.54% and 81.05%, respectively. Patients with cIV above 30 ng/mL had a 5.57-times (IC: 1.86-16.69) the chance of having significant fibrosis and 7.61-times (IC: 2.27-25.54) the chance of having advanced fibrosis versus patients with values below 30 ng/mL. HA, PC III, LN and CG did not detect the presence of significant and advanced fibrosis. The AUROC of clV for detection of significant (0.718) and advanced fibrosis (0.791) was better than that of other serum biomarkers. Conclusion: Type 4 collagen could predict the presence of significant and advanced fibrosis in NAFLD patients and it would be a useful tool in routine clinical practice. (C) 2020 Fundacion Clinica Medica Sur, A.C.
- Methylene tetrahydrofolate reductase (MTHFR) and vascular endothelial growth factor (VEGF) poly- morphisms in Brazilian patients with Hepatitis C virus (HCV)-related hepatocellular carcinoma (HCC)(2021) CARVALHO, Sylene C. R.; VASCONCELOS, Luydson R. S.; FONSECA, Leonardo da; CARMO, Rodrigo F.; TOMITAO, Michele T.; AROUCHA, Dayse C. B. L.; PEREIRA, Leila M. M. B.; STEFANO, Jose Tadeu; RIBEIRO-JUNIOR, Ulysses; OLIVEIRA, Claudia P.; CARRILHO, Flair J.OBJECTIVE: The folate pathway is involved in hepatic carcinogenesis and angiogenesis. Polymorphisms in genes related to such processes, including methylene tetrahydrofolate reductase (MTHFR) and vascular endothelial growth factor (VEGF)] may play an important role in the development of hepatocellular carcinoma (HCC). The objective of this study was to evaluate MTHFR and VEGF polymorphisms in Brazilian patients with hepatitis C virus (HCV)-related HCC. METHODS: A total of 119 patients diagnosed with confirmed HCC and HCV were included in the study. SNP genotyping assays were performed using real-time PCR. VEGFA (rs2010963, rs3025039, and rs833061) and MTHFRC677T (rs1801133, rs1801131) polymorphisms were evaluated. RESULTS: The C alleles of MTHFR (rs1801131) and VEGF (rs2010963) were associated with protection against the development of multinodular HCC, while the T allele of MTHFR (rs1801133) was associated with a higher risk of multinodular presentation [p=0.04 OR 1.835 CI (1.022-3.297)]. Multivariate analysis revealed that the GG/GC genotypes of VEGF rs2010963 were independently associated with multinodular tumors at diagnosis (p=0.013; OR 4.78 CI (1.38-16.67)]. CONCLUSION: Our results suggest that these polymorphisms may increase the risk of rapid tumor progression in patients with HCV infection. This subgroup of patients with HCC and who present polymorphism is more likely to be diagnosed with multinodular disease and not be amenable to receiving curative treatments. These data must be validated in larger cohorts, and the screening intervals can be customized based on genetic history.