Background: The HIVCOBOC-RGT study (NCT01925183) was the first study to evaluate response-guided shortening of the duration of boceprevir (BOC)-based triple therapy in human immunodeficiency virus (HIV)/hepatitis C virus genotype 1-coinfected patients (HIV/HCV-GT1).
Methods: After 4 weeks of pegylated interferon-α-2a/ribavirin (PEGIFN/RBV) lead-in, patients with target-not-detectable HCV-RNA at week 8 (rapid virologic response; LI4W-W8UTND) received 24 weeks of BOC/PEGIFN/RBV (total: 28 weeks [W28]). Patients with target-detectable HCV-RNA at week 8 received 44 weeks of BOC/PEGIFN/RBV (total: 48 weeks [W48]).
Results: Fourteen patients (67%) had LI4W-W8UTND and were eligible for the shortened W28 arm, while 7 (33%) patients were allocated to the W48 arm. No breakthrough or relapse occurred in the W28 arm, resulting in a sustained virologic response (SVR12TND) rate of 100% (12/12). In the W48 arm, the SVR12TND was 50% (3/6), with 3 patients meeting the futility rule at treatment week 12. The preliminary overall SVR12TND rate was 83% (15/18). Serious adverse events were observed in 5 (24%) patients, with 2 (10%) patients requiring surgical treatment of abscesses.
Conclusions: The majority of HIV/HCV-GT1 were eligible for response-guided shortening of treatment duration to W28 and all of these patients had a SVR12TND. If second-generation direct-acting antivirals are not available, W28 of BOC-based triple therapy may be recommended.
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