Clinical experience with dolutegravir/abacavir/lamivudine in HIV–HCV co-infected patients treated with a sofosbuvir-based regimen—safety and efficacy

Background: There is no known reason to suspect an adverse drug interaction between dolutegravir-based antiretroviral therapy and sofosbuvir, simeprevir, or ledipasvir. There is a paucity of clinical data for this combination. Methods: Prospective, open-label study of patients with HIV well controlled on dolutegravir, abacavir, and lamivudine, who were co-infected with HCV genotype 1, and required therapy with simeprevir plus sofosbuvir or sofosbuvir/ledipasvir single-tablet regimen (STR) for 12 weeks. The two primary endpoints were percentage of patients achieving sustained virologic response (SVR) at 12 weeks post-treatment and percentage of patients with a HIV-1 viral load <50 copies/ml at end of the combination therapy. Results: Twenty-eight subjects were enrolled from August 2014 to September 2015. Thirteen patients were treated with simprevir plus sofosbuvir, and 15 subjects were treated with sofosbuvir/ledipasvir. 23 genotype 1a, and 5 genotype 1b were included. Nineteen were treatment naïve, and 2 patients had compensated cirrhosis. The mean age was 59 years (95% CI 58.21–59.78 years). The mean age was 59 years (95% CI: 58.21–59.78 years), and 25 patients were black. Out of the 28 patients who completed this study, SVR 12 was achieved in 27 of 28 patients (96%, 95% CI 89.6–100.0%), and all patients had an HIV virus load <50 copies/ml at week 12 of therapy, for an intent-to-treat rate of 100%. No patients ended therapy secondary to adverse events. Conclusion: Our study suggests a good safety and efficacy for the combination of a dolutegravir, abacavir, and lamivudine with sofosbuvir-based DAA therapy.