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Background Chronic hepatitis C (CHC) virus is associated with insulin resistance and diabetes which have been linked to progressive liver fibrosis and sustained virologic response (SVR) to antiviral treatment. Resistin is a polypeptide hormone belonging to adipokines that may contribute to the development of obesity, insulin resistance, and metabolic syndrome. Also, the link between resistin and insulin resistance in patients with chronic hepatitis C and the effect of new direct acting antivirals on them seems unclear at present. The aim of this study is to evaluate the role of Resistin in detecting Insulin Resistance and their impact on response to direct acting antiviral in chronic hepatitis C patients. Results The Study was prospective Cohort clinical study, in Hepatology outpatient clinic at Ain Shams University Hospitals .This study was performed on 40 Egyptian patients who have Chronic viral hepatitis C, divided into 3 groups: GROUP I includes: 20 patients with Chronic viral hepatitis C on Sofosbovir- Daclatasvir before start of treatment and Sustained viral response after 12 weeks [SVR 12]. GROUP II includes: 20 patients with Chronic viral hepatitis C and non-responders before start of 2nd line of treatment and SVR 12. GROUP III includes: 10 subjects not infected with HCV as control group. The following investigations were done: body mass index calculation, Laboratory investigations including CBC, complete hepatic function tests, FIB-4 calculation, fasting serum insulin, HOMA-IR and serum Resistin level at baseline and re-assessed 12 weeks post end of treatment. Fasting serum Insulin, HOMA-IR and Resistin level were statistically significant higher in both naïve & relapser chronic HCV infected patients than in control group (p value <0.001). SVR 12 weeks post treatment was achieved in all 40 patients received new direct acting antivirals with a Significant reduction in Fasting serum Insulin, HOMA-IR and Resistin level at SVR 12 week (p value 0,001, <0.001, <0.001) respectively. Significant positive correlation was found between Resistin level and HOMA-IR in both naïve and relapse chronic HCV patients. Calculation of FIB-4 among patients showed significant higher FIB-4 in naïve patients than relapser (p value 0,002). Serum Resistin at a cut off value >1800 ng/ml had 38.89 % sensitivity, 86.36 % specificity, 70 % PPV, 63.3 % NPV (with an overall accuracy of 57.1 %) in predicting absence of liver cirrhosis based on FIB-4. And at a cutoff value ≥2400 ng/ml had 93.55% sensitivity, 33.3% specificity, 82.9% positive predictive value, and 60% negative predictive value with an overall accuracy of 62.4% in prediction of significant insulin resistance among chronic HCV patients. Conclusion Serum Resistin level was significantly up regulated in patients with chronic HCV, with significant reduction in its level after achievement of SVR. Resistin has the potential to be a biomarker for screening of insulin resistance among chronic HCV patients.

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