BCAA was more closely associated with visceral fat area than subcutaneous fat area in patients of type 2 diabetes mellitus：a cross-sectional study

抄録

Abstract
Background Branched-chain amino acid (BCAA) has been reported to be associated with obesity, the association of BCAA with visceral fat area (VFA) and subcutaneous fat area (SFA) remained unclear in patients with type 2 diabetes. Methods This cross-sectional study was conducted in 284 patients with type 2 diabetes mellitus. Enzyme-linked immunospecific assay was used to measure levels of seral BCAA and branched-chain keto acid (BCKA). VFA and SFA were measured with bioimpedance analysis method. The association between BCAA and VFA was obtained using Pearson correlation and multivariable linear regression analysis. Results There were significant differences in the means of body mass index, waist circumstance, SFA and VFA among the three groups divided by BCAA tertiles (all p < 0.05). Compared to patients with lower levels of seral BCAA (the lower tertile group), the means of VFA and SFA were significantly larger in middle and upper tertile groups (all P < 0.05). However, the differences in above obesity parameters were nonsignificant according to various BCKA tertiles. Pearson correlation analysis also demonstrated that BCAA levels were positive associated with each obesity parameter (p < 0.05). Nevertheless, multivariable linear regression analysis showed that levels of seral BCAA were correlated with VFA, BMI and WC (all p < 0.05) rather than SFA after adjusted for other confounders. Conclusions levels of seral BCAA were more closely correlated with VFA than SFA, prospective studies should be warranted to further explore the mechanism mediating BCAA and visceral fat accumulation in Human beings.