Background/aims: Hepatitis C virus (HCV) infection carries a significant risk for development of insulin resistance (IR) and/or diabetes mellitus. Recently, retinol-binding protein 4 (RBP4) has been reported as a protein contributing to IR. This study aimed to assess the correlation between RBP4 and disease severity of chronic HCV infection (CHC).
Methods: Serum RBP4 was measured in 105 treatment-nai ve CHC patients and its correlation with the homeostasis model assessment of insulin resistance index (HOMA-IR), liver histology, virology and metabolic factors was investigated. Patients were stratified into different stages of glucose tolerance by oral glucose tolerance test.
Results: There was a significant decreasing linear trend of RBP4 dependent on both histological grading (from 35.8+/-16.5 microg/mL of minimal to 19.2+/-12.5 microg/mL of severe, P=0.002) and staging (from 34.2+/-10.0 microg/mL of F0 to 22.2+/-11.9 microg/mL of F3-4, P=0.02) progression, whilst a significant increment of HOMA-IR was found. Multivariate regression analysis showed BMI (1.1, 95% CI 0.44 ~ 1.77, P=0.001), HDL-C (-0.40, 95% CI -0.73 ~ -0.06, P=0.02), and LDL-C (0.31, 95% CI 0.02 ~ 0.61, P=0.04) were the significant variables for prediction of RBP4.
Conclusions: Disease severity may limit the role of RBP4 as a predictor of IR in CHC.
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