Retinol-binding protein 4: a new marker of virus-induced steatosis in patients infected with HCV genotype 1

Retinol-binding protein 4 (RBP4) is an adipocytokine associated with insulin resistance. We tested serum levels of RB4 to assess its link with steatosis in patients with genotype 1 (G1) chronic hepatitis C (CHC) or non-alcoholic fatty liver disease (NAFLD). Non-diabetic patients with CHC (n=143) or NAFLD (n=37) were evaluated by liver biopsy and anthropometric and metabolic measurements, including insulin resistance by the homeostasis model assessment (HOMA). Biopsies were scored by Scheuer classification for CHC, and Kleiner for NAFLD. Steatosis was tested as a continuous variable and graded as absent-mild