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Canadian Journal of Gastroenterology
Volume 26, Issue 6, Pages 325-329
http://dx.doi.org/10.1155/2012/291457
Original Article

The Interaction among Insulin Resistance, Liver Fibrosis and Early Virological Response in Egyptian Patients with Chronic Hepatitis C

Dina H Ziada,1 Sherif El Saadany,1 Mohamed Enaba,2 Medhat Ghazy,2 and Azza Hasan3

1Department of Tropical Medicine, Faculty of Medicine, Tanta University, Tanta, Egypt
2Department of Internal Medicine, Faculty of Medicine, Tanta University, Tanta, Egypt
3Department of Microbiology, Faculty of Medicine, Tanta University, Tanta, Egypt

Received 3 April 2011; Accepted 8 September 2011

Copyright © 2012 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

BACKGROUND: Hepatitis C virus (HCV) infection may induce insulin resistance (IR) irrespective of the severity of liver disease, and there is evidence of a central role for IR in failure to achieve sustained virological response (SVR) in HCV patients.

OBJECTIVE: To assess IR as a predictor of the severity of hepatic fibrosis in Egyptian HCV patients, and its effect on early viral kinetics and virological response to HCV therapy.

METHODS: A total of 140 chronic HCV patients were divided into two groups according to the homeostasis model assessment-IR (HOMA-IR). Group 1 consisted of 48 chronic HCV patients with HOMA-IR ≥2, and group 2 consisted of 92 chronic HVC patients without IR (HOMA IR <2). All patients were treated with combination therapy (pegylated interferon-alpha 2a plus ribavirin) for 48 weeks and studied for viral kinetics throughout the period of therapy.

RESULTS: The study revealed that older age, higher body mass index and HOMA-IR≥2 were significantly associated with advanced fibrosis. Rapid virological response, complete early virological response and SVR were significantly lower in the IR-HCV group compared with the non-IR-HCV group. Univariate and multivariate analyses revealed that older age, fibrosis (F≥3), high viral load (>600,000 IU/mL) and HOMA-IR ≥2 were significantly associated with a lack of viral kinetics as well as SVR. However, HOMA-IR ≥2 was the main independent variable associated with lack of SVR. On the other hand, body mass index, plasma insulin level and HOMA-IR decreased significantly compared with starting levels in patients who achieved SVR. This suggests a cause and effect relationship between HCV infection and IR.

CONCLUSION: IR in chronic HCV patients is associated with progressive fibrosis and slow viral kinetics, and could be a predictor for lack of rapid and early virological response. Therefore, HOMA-IR levels should be measured and improved before starting antiviral treatment.