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Early HCV dynamics on Peg-interferon and ribavirin in HIV/HCV co-infection: indications for the investigation of new treatment approaches.

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Methods: Open, prospective trial including 28 co-infected patients with directly observed treatment with Peg-IFN + RBV. We assessed the predictive values of EVR (> or = 2 log10 of HCV decay or a negative qualitative test) at days 1, 7, 28 and in week 12 of the SVR.

Results: The SVR in an intention-to-treat analysis was 28.6% (genotype 1, 1/13; genotype 3, 6/10; genotype 4, 1/5). Patients who reached SVR presented a significantly faster HCV plasma viral load reduction compared to non-responders from the first 24 h [-1.06 log10 (interquartile range, -1.7 to -0.4) versus -0.05 log10 (interquartile range, -0.4 to +0.14) respectively; P = 0.002]. The median HCV viral load at week 12 was significantly different from that at baseline in responder and transient responders but not in non-responder patients. The positive predictive value was 100% within the first month and the best negative predictive value was 92% and 88.8% at weeks 4 and 12 respectively. The only genotype 1 responder patient had eight mutations in ISDR2209-2248.

Conclusion: The SVR in an intention-to-treat analysis was 28.6% (genotype 1, 1/13; genotype 3, 6/10; genotype 4, 1/5). Patients who reached SVR presented a significantly faster HCV plasma viral load reduction compared to non-responders from the first 24 h [-1.06 log10 (interquartile range, -1.7 to -0.4) versus -0.05 log10 (interquartile range, -0.4 to +0.14) respectively; P = 0.002]. The median HCV viral load at week 12 was significantly different from that at baseline in responder and transient responders but not in non-responder patients. The positive predictive value was 100% within the first month and the best negative predictive value was 92% and 88.8% at weeks 4 and 12 respectively. The only genotype 1 responder patient had eight mutations in ISDR2209-2248.

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