Efficacy, safety and pharmacokinetics of simeprevir and TMC647055/ritonavir with or without ribavirin and JNJ-56914845 in HCV genotype 1 infection.

BACKGROUND: A Phase 2a, open-label study (NCT01724086) was conducted to assess the efficacy and safety of a once-daily, 2-direct-acting-antiviral-agent (2-DAA) combination of simeprevir + TMC647055/ritonavir ± ribavirin and of the 3-DAA combination of simeprevir + TMC647055/ritonavir + JNJ-56914845 in chronic hepatitis C virus genotype (GT)1-infected treatment-naïve and prior-relapse patients. METHODS: The study comprised four 12-week treatment panels: Panel 1 (n = 10; GT1a) and Panel 2-Arm 1 (n = 12; GT1b): simeprevir 75 mg once daily + TMC647055 450 mg once daily/ritonavir 30 mg once daily + ribavirin 1000-1200 mg/day; Panel 2-Arm 2 (n = 9; GT1b): simeprevir 75 mg + TMC647055 450 mg/ritonavir 30 mg without ribavirin; Panel 3: simeprevir 75 mg + TMC647055 600 mg/ritonavir 50 mg with (Arm 1: GT1a; n = 7) or without (Arm 2: GT1b; n = 8) ribavirin; Panel 4: simeprevir 75 mg + TMC647055 450 mg/ritonavir 30 mg + JNJ-56914845 30 mg once daily (Arm 1: n = 22; GT1a/GT1b) or 60 mg once daily (Arm 2: n = 22; GT1a/GT1b). Primary endpoint was sustained virologic response 12 weeks after end of treatment (12 weeks of combination treatment; SVR12). RESULTS: In Panel 1 and Panel 2-Arm 1, 5/10 and 6/12 (50%) GT1a/GT1b + ribavirin patients achieved SVR12, versus 3/9 (33%) GT1b without ribavirin patients in Panel 2-Arm 2. In Panel 3-Arm 1 and Panel 3-Arm 2, 6/7 (86%) GT1a + ribavirin and 4/8 (50%) GT1b without ribavirin patients, respectively, achieved SVR12. In Panel 4, 10/14 (71%) and 14/15 (93%) GT1a patients in Arms 1 and 2 achieved SVR12 compared with 8/8 and 7/7 (100%) GT1b patients in each arm, respectively. No deaths, serious adverse events (AEs), Grade 4 AEs or AEs leading to treatment discontinuation occurred. CONCLUSIONS: The 2- and 3-DAA combinations were well tolerated. High SVR rates of 93% and 100% in GT1a- and GT1b-infected patients, respectively, were achieved in this study by combining simeprevir with JNJ-56914845 60 mg and TMC647055/ritonavir. TRIAL REGISTRATION: NCT01724086 (date of registration: September 26, 2012).

Antiviral activity, pharmacokinetics, and safety of the HIV-1 protease inhibitor TMC310911, coadministered with ritonavir, in treatment-naive HIV-1-infected patients.

OBJECTIVES: TMC310911 is a novel HIV type-1 (HIV-1) protease inhibitor with broad in vitro antiviral activity. In this phase 2a, open-label randomized study, the antiviral activity, pharmacokinetics, and safety and tolerability of ritonavir-boosted TMC310911 was assessed. METHODS: In this study, treatment-naive HIV-1 patients (aged 18-60 years) received 1 of the 4 dosing regimens of TMC310911: 150 mg twice-daily (bid) (n = 8), 300 mg bid (n = 8), 75 mg bid (n = 9), or 300 mg once-daily (qd) (n = 8), for 14 days, all coadministered with 100 mg of ritonavir, as only antiretroviral therapy. RESULTS: The mean change from baseline in HIV-1 RNA (log10 copies per milliliter; primary efficacy endpoint) was -1.30 (75 mg bid), -1.14 (150 mg bid), -1.07 (300 mg bid), and -1.06 (300 mg qd) on day 8 and -1.53 (75 mg bid), -1.79 (150 mg bid), -1.69 (300 mg bid), and -1.55 (300 mg qd) on day 15. At steady state (day 14), the mean maximum plasma concentration and mean area under the plasma concentration-time curve from 0 to 12 hours tended to increase dose proportionally for bid doses; TMC310911 daily exposures for the 300 mg qd treatment and 150 mg bid treatment were comparable. The most common (≥ 10%) treatment-emergent adverse events were fatigue (27.3%) and nausea (12.1%); no deaths or serious treatment-emergent adverse events were reported in this study. CONCLUSIONS: Combination treatment with TMC310911 and ritonavir showed potent antiviral activity (>1.5 log10 copies/mL decrease in plasma HIV-1 RNA) at all evaluated doses, and treatment was generally safe and well tolerated.

Safety and pharmacokinetics of the HIV-1 protease inhibitor TMC310911 coadministered with ritonavir in healthy participants: results from 2 phase 1 studies.

OBJECTIVES: To evaluate safety, tolerability, and pharmacokinetics of TMC310911, a novel human immunodeficiency virus type-1 protease inhibitor. METHODS: Healthy participants aged 18-55 years with body mass index 18-30 kg/m were enrolled in 2 phase 1 studies. In the first-in-human, single-dose study, 18 participants received placebo or TMC310911 (75-2000 mg) in the double-blind phase and 8 participants received 300 or 600 mg of TMC310911 [administered alone or with 100 mg ritonavir twice daily (bid)] in the subsequent open-label phase. The multiple-dose double-blind study included 5 successive treatment sessions wherein healthy participants received placebo or TMC310911 [300 mg bid, 600 mg once daily or 150 mg bid (plus 100 mg ritonavir bid), 900 mg bid (alone) or 300 mg bid (plus ritonavir 50 mg bid)]; in all sessions, TMC310911 and ritonavir were administered for 6 and 9 days, respectively. RESULTS: In the single-dose study, no dose-limiting toxicity was observed up to 2000 mg of TMC310911. Systemic exposure to TMC310911 generally increased in a dose-proportional manner after the single- or multiple-dose administrations. Coadministration of ritonavir increased the systemic exposure to TMC310911. The mean Cmax and area under plasma concentration-time curve values (single-dose: 1200 mg TMC310911) were higher under fasted conditions than in fed condition. In both studies, most treatment-emergent adverse events were related to gastrointestinal system. CONCLUSIONS: TMC310911 exhibited a linear pharmacokinetic profile after the single- (up to 2000 mg) and multiple-dose (up to 900 mg) administrations; ritonavir improved the pharmacokinetic profile of TMC310911. TMC310911 was generally safe and tolerable when administered with or without ritonavir.