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Abstract

Leucine catabolism changes among people with central obesity. This condition can lead to metabolic pathway disorder and increased mTORC-1 activation. Downstream signal of mTORC-1 is p70S6K1, which causes phosphorylation of insulin-1 receptor substrate (IRC-1). This study was performed to evaluate correlation between leucine concentration and insulin resistance (IR). This study was a prospective cross-sectional study, involving two groups; control and obese group. General characteristics and blood sample were taken from each subject. Leucin and Homeostasis Model Assesment (HOMA)-IR, as the marker of insulin resistance, were evaluated. The result indicated a significant positive correlation between leucine concentration and insulin resistance value (R=0.351; P=0.006) in central obese men.
The higher leucine concentration, the higher the risk of insulin resistance occurrance. Therefore, leucine can be used as a biomarker for early detection of insulin resistance.

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