Serum HCV-RNA levels were: 5.622±0.767 log10 IU/mL (range, 3.062-6.606) and 4.408±1.293 log10 IU/mL (range, 2.585-6.874) at baseline and 4 weeks posttreatment, respectively (P < 0.0001).

All patients underwent a follow-up visit at week 12 after treatment. Serum HCV-RNA was undetectable in 409 of 573 (71.38%) patients, and 408 of these had an SVR. The PPV for SVR was 99.7% (95% CI 99.1-100) at that time (Table 2). The PPVs were 99.5% (95% CI 98.5-100) and 100% in patients treated with PEG-IFNα-2a and PEG-IFNα-2b, respectively. A subset of 81 patients had a frozen serum sample available for measurement of both baseline and 12 weeks posttreatment. Serum HCV-RNA levels were 5.674 ± 0.706 log10 IU/mL (range, 3.062-6.697) and 5.078 ± 0.744 log10 IU/mL (range, 2.921-6.319) at baseline and12 weeks posttreatment, respectively (P < 0.02). All patients underwent Estrogen antagonist AZD4547 solubility dmso a follow-up visit at 24 weeks posttreatment. Serum HCV-RNA was undetectable in 408 of 573 (71.20%) patients, and an SVR was found in all patients (100%) (Table 2). The patient demonstrating a relapse at W+24 (undetectable at W+12) was a 55-year-old genotype 2–naïve patient treated for 24 weeks of the combination therapy PEG-IFNα-2a plus ribavirin. At inclusion serum alanine aminotransferase level was subnormal (1.1 N), serum HCV-RNA load was 5.124 log IU/mL, liver histology showed a moderate liver disease (A2/F2; Metavir scoring

system). Serum HCV-RNA was undetectable 12 weeks after treatment initiation. Interestingly, this patient was a sustained responder to a second course of 48 weeks of the combination therapy PEG-IFNα-2a plus ribavirin. A subset of 89 patients had frozen serum samples available for measurement of both baseline and 24 weeks posttreatment. Serum HCV-RNA levels were 5.617 ± 0.752 (range, 3.062-6.606) log10 IU/mL and 5.205 ± 0.744 (range, 2.921-6.319) log10 IU/mL at baseline and 24 weeks posttreatment, respectively (P = 0.001). Serum HCV-RNA level outcome in one typical relapse patient during 36

weeks posttreatment follow-up as shown in Fig. 1. A subset of 58 patients had frozen serum samples available at baseline, W+12, and W+24 after the end of treatment. Serum 上海皓元医药股份有限公司 HCV-RNA levels were: 5.623 ± 0.748 log10 IU/mL (range, 3.062-6.606), 4.979 ± 0.870 log10 IU/mL (range, 2.585-6.129), and 5.216 ± 0.758 log10 IU/mL (range, 2.921-6.319) at baseline, W+12, and W+24, respectively (P < 0.001) (Fig. 2). These results show that the viral load increases rapidly in relapse patients to nearly reach baseline levels as early as 24 weeks posttreatment. In this community-based study performed in a large cohort (n = 573) of patients with an end-of-treatment virological response assessed with a sensitive assay (TMA), 408 of 409 patients with undetectable serum HCV-RNA 12 weeks after the end of treatment had an SVR (PPV 99.4%). It is noteworthy that 34% of the patients had advanced fibrosis (19% had bridging fibrosis [stage F3]; 15% had cirrhosis [stage F4]).