Insulin resistance and insulin secretion in chronic hepatitis C virus infection

Journal of Hepatology
Ryoichi NaritaMakoto Otsuki

Abstract

Diabetes mellitus (DM) is frequently observed in patients with chronic hepatitis caused by hepatitis C virus infection (CHC). The present study was designed to determine the pathogenic factors responsible for glucose intolerance in CHC patients. A total of 131 patients with CHC were enrolled in this study. Insulin resistance and beta-cell function were determined after 75 g oral glucose tolerance tests. Glucose intolerance was detected in 27.5% (36/131) of CHC patients; 10 had DM and 26 impaired glucose tolerance. HOMA-R [insulin 0xglucose 0/22.5] was greater in patients with both impaired glucose tolerance and DM than in those with normal glucose tolerance (P<0.01). Matsuda index [10(4)/ (square root) (mean insulinxmean glucosexglucose 0xinsulin 0)] was lower in diabetic patients than in those with normal glucose tolerance (P<0.05). The insulinogenic index [Deltainsulin 30-0/Deltaglucose 30-0] and DeltaC-peptide 30 [DeltaC-peptide 30-0/Deltaglucose 30-0] were significantly lower even in patients with impaired glucose tolerance than in patients with normal glucose tolerance (P<0.01). Both insulin resistance and beta-cell dysfunction contribute to glucose intolerance in CHC patients.

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