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Body mass index and the visceral adipose tissue expression of IL-6 and TNF-alpha are associated with the morphological severity of non-alcoholic fatty liver disease in individuals with class III obesity. | LitMetric

Body mass index and the visceral adipose tissue expression of IL-6 and TNF-alpha are associated with the morphological severity of non-alcoholic fatty liver disease in individuals with class III obesity.

Obes Res Clin Pract

Nucleus of Epidemiological and Molecular Research Catrumano. Health Research Laboratory. Health Science Post-graduate Programme, Universidade Estadual de Montes Claros, 39401-001 Montes Claros, MG, Brazil; Department of Dentistry, Universidade Estadual de Montes Claros, 39401-001 Montes Claros, MG, Brazil. Electronic address:

Published: April 2019

Objectives: To analyze the mRNA expression of interleukin-6 (IL-6) and tumour necrosis factor-alpha (TNF-α) in the liver and white adipose tissue samples of individuals with class III obesity (body mass index ≥40.0kg/m) with non-alcoholic fatty liver disease (NAFLD).

Methods: This cross-sectional study included patients with class III obesity exhibiting early or late morphological presentation of NAFLD (non-alcoholic hepatic steatosis [NAFL], n=8 and non-alcoholic steatohepatitis [NASH], n=13, respectively). All patients underwent bariatric surgery and peripheral blood, liver, and visceral white adipose tissue (WAT) samples were collected. Socio-demographic, anthropometric, clinical, plasma biochemical, and nutritional characteristics of each study subject were assessed and compared between patients presenting with NAFL and NASH. IL-6 and TNF-α mRNA expression in the liver and WAT samples were measured by using quantitative real time-polymerase chain reaction (qRT-PCR).

Results: Individuals with class III obesity and NASH showed higher body mass index (BMI) and higher IL-6 and TNF-α mRNA expression in the WAT compared to that of patients with NAFL (p=0.01, for all associations).

Conclusions: Individuals with class III obesity with higher morphological severity of NAFLD exhibited higher BMI and higher IL-6 and TNF-α expression in the WAT. Future prospective studies are warranted to determine how BMI, IL-6, and TNF-α affect the progression of NAFLD in individuals with class III obesity.

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http://dx.doi.org/10.1016/j.orcp.2016.03.009DOI Listing

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