Trial Outcomes & Findings for A Study of TMC435350 Administered With or Without Standard of Care Therapy in Participants With Genotype 1 Hepatitis C Virus Infection (NCT NCT00561353)

The study was conducted at 25 sites in 6 countries: Belgium, France, Germany, Poland, the Netherlands, and the United Kingdom.

A total of 121 participants infected with Hepatitis C virus (HCV) were randomized of whom 116 were treated. Reasons for not receiving treatment were withdrawal of consent (4 participants) and sponsor's decision (1 participant).

A Study of TMC435350 Administered With or Without Standard of Care Therapy in Participants With Genotype 1 Hepatitis C Virus Infection

The table below shows the change from Baseline in plasma levels of HCV RNA at Week 4 following treatment with TMC435 or placebo as for 7 days followed by TMC435 or placebo coadministered with ribavirin for 21 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22 in treatment-naïve HCV-infected participants. (A treatment-naive participant is someone who has never taken drugs for their HCV infection).

The table below shows the change from Baseline in plasma levels of HCV RNA at Week 4 following treatment with TMC435 or placebo coadministered with ribavirin for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22 in treatment-naïve HCV-infected participants. (A treatment-naive participant is someone who has never taken drugs for their HCV infection).

The table below shows the change from Baseline in plasma levels of HCV RNA at Week 4 following treatment with TMC435 or placebo coadministered with ribavirin for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22 in treatment-experienced participants considered non-responders (defined as participants who achieved less than a 2 log10 IU/mL decline from baseline in plasma HCV RNA levels after 12 weeks of previous interferon \[IFN\]-based therapy \[pegylated or non-pegylated\]) or relapsers (defined as a participant with undetectable plasma HCV RNA at the end of treatment of previous IFN-based therapy and subsequent confirmed detectable plasma HCV RNA levels during follow-up).

The table below shows the change from Baseline in plasma levels of HCV RNA on Day 7 (at Week 1) following treatment with TMC435 or placebo for 7 days followed by TMC435 or placebo coadministered with ribavirin for 21 days + peginterferon alpha-2a (PegIFNα-2a) on Days 8, 15, and 22 in treatment-naïve HCV-infected participants. (A treatment-naive participant is someone who has never taken drugs for their HCV infection).

The table below shows the change from Baseline in plasma levels of HCV RNA on Day 7 (at Week 1) following treatment with TMC435 or placebo coadministered with ribavirin for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22 in treatment-naïve HCV-infected participants (A treatment-naive participant is someone who has never taken drugs for their HCV infection).

The table below shows the change from Baseline in plasma levels of HCV RNA on Day 7 (Week 1) following treatment with TMC435 or placebo coadministered with ribavirin for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22 in treatment-experienced participants considered non-responders (defined as participants who achieved less than a 2 log10 IU/mL decline from baseline in plasma HCV RNA levels after 12 weeks of previous interferon \[IFN\]-based therapy \[pegylated or non-pegylated\]) or relapsers (defined as a participant with undetectable plasma HCV RNA at the end of treatment of previous IFN-based therapy and subsequent confirmed detectable plasma HCV RNA levels during follow-up).

The table below shows the number of treatment-naïve HCV-infected participants treated with TMC435 or placebo for 7 days followed by TMC435 or placebo coadministered with ribavirin for 21 days + peginterferon alpha-2a (PegIFNα-2a) on Days 8, 15, and 22 who had the following virologic responses: plasma levels of HCV ribonucleic acid (RNA) of greater than or equal to 2 log10 decline from Baseline; plasma levels of HCV RNA below the limit of quantification (ie, less than \[\<\] 25 IU/mL detectable or undetectable); plasma levels of HCV RNA below the limit of detection (ie, \<25 IU/mL undetectable); plasma levels of HCV RNA \<100 IU/mL; and plasma levels of HCV RNA \<1000 at the time points listed. See "treatment-naive" defined above.

The table below shows the number of treatment-naive HCV-Infected participants with the following virologic responses to treatment with TMC435 or placebo coadministered with ribavirin for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 8, 15, and 22: plasma levels of HCV ribonucleic acid (RNA) of greater than or equal to 2 log10 decline from Baseline; plasma levels of HCV RNA below the limit of quantification (ie, less than \[\<\] 25 IU/mL detectable or undetectable); plasma levels of HCV RNA below the limit of detection (ie, \<25 IU/mL undetectable); plasma levels of HCV RNA \<100 IU/mL; and plasma levels of HCV RNA \<1000 at the time points listed. See "treatment-naive" defined above.

The table below shows the number of treatment-experienced participants (non-responders and relapsers, see defined above) with the following virologic responses to treatment with TMC435 or placebo coadministered with ribavirin for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22: plasma levels of HCV ribonucleic acid (RNA) of greater than or equal to 2 log10 decline from Baseline; plasma levels of HCV RNA below the limit of quantification (ie, less than \[\<\] 25 IU/mL detectable or undetectable); plasma levels of HCV RNA below the limit of detection (ie, \<25 IU/mL undetectable); plasma levels of HCV RNA \<100 IU/mL; and plasma levels of HCV RNA \<1000 at the time points listed. Note: in the table below, the number of participants (n) analyzed in the TMC435 200 mg (Cohort 4, Panel B) on Day 28 (Week 4) was n=4.

The table below shows the number of treatment-naïve participants in the treatment groups for Cohort 1 (Panel A and B combined) and in Cohort 2 (Panel A and B combined) who met the following virologic response parameters: rapid virological response (RVR) defined as having undetectable plasma HCV ribonucleic acid (RNA) at Week 4; early virologic response (EVR) defined as change from baseline in plasma HCV RNA of greater than or equal to 2 log 10 at Week 12); a complete EVR (cEVR) defined as a complete EVR having undetectable plasma HCV RNA at Week 12); an extended RVR (eRVR) defined as undetectable plasma HCV RNA at Week 4 and 12; and a partial response defined as EVR but not reaching undetectability while on treatment.

The table below shows the number of treatment-experienced participants (non-responders and relapsers, see defined above) treated with TMC435 or placebo coadministered with ribavirin for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22 who met the following virologic response parameters: rapid virological response (RVR) defined as having undetectable plasma HCV ribonucleic acid (RNA) at Week 4; early virologic response (EVR) defined as change from baseline in plasma HCV RNA of greater than or equal to 2 log 10 at Week 12; a complete EVR (cEVR) defined as a EVR having undetectable plasma HCV RNA at Week 12; an extended RVR (eRVR) defined as undetectable plasma HCV RNA at Week 4 and 12; and a partial response defined as EVR but not reaching undetectability while on treatment.

The table below shows the number of treatment-naïve participants with an initial suboptimal response defined as less than 2 log10 change in plasma level of hepatitis C virus (HCV) ribonucleic acid (RNA) on Day 2 or 3 (depending when visit was scheduled) following treatment with TMC435 or placebo for 7 days followed by TMC435 or placebo coadministered with ribavirin for 21 days + peginterferon alpha-2a (PegIFNα-2a) on Days 8, 15, and 22. See "treatment-naive" defined above.

The table below shows the number of treatment-naïve participants with an initial suboptimal response defined as less than 2 log10 change in plasma plasma level of hepatitis C virus (HCV) ribonucleic acid (RNA) on Day 2 or 3 (depending when visit was scheduled) after treatment with TMC435 or placebo coadministered with ribavirin for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22. See "treatment-naive" defined above.

The table below shows the number of treatment-experienced participants (non-responders and relapsers, see defined above) with an initial suboptimal response defined as less than 2 log10 change of plasma in plasma level of HCV ribonucleic acid (RNA) at Day 2 or 3 (depending when visit was scheduled) treated with TMC435 or placebo coadministered with ribavirin for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22.

The table below shows the number of treatment-naïve participants with viral breakthrough, defined as a confirmed increase of greater than 1 log10 IU/mL in plasma HCV ribonucleic acid (RNA) level from the lowest level reached, or a confirmed plasma HCV RNA level of greater than 100 IU/mL in participants whose plasma HCV RNA had previously been below the limit of quantification (25 IU/mL detectable) or undetectable (less than 25 IU/mL undetectable) after treatment with TMC435 or placebo for 7 days followed by TMC435 or placebo coadministered with ribavirin for 21 days + peginterferon alpha-2a (PegIFNα-2a) on days 8, 15, and 22 (Panel A) and after treatment with TMC435 or placebo coadministered with ribavirin for 28 days + PegIFNα-2a on Days 1, 8, 15, and 22 (Panel B).

The table below shows the number of treatment-experienced participants (non-responders and relapsers, see defined above) with viral breakthrough, defined as a confirmed increase of greater than 1 log10 IU/mL in plasma HCV ribonucleic acid (RNA) level from the lowest level reached), or a confirmed plasma HCV RNA level of greater than 100 IU/mL in participants whose plasma HCV RNA had previously been below the limit of quantification (25 IU/mL detectable) or undetectable (less than 25 IU/mL undetectable) treated with TMC435 or placebo coadministered with ribavirin for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22.

The table below shows the number of treatment-naïve participants with viral relapse (defined as having confirmed detectable plasma level of HCV ribonucleic acid \[RNA\] during the follow-up period in participants with undetectable plasma HCV RNA \[less than 25 IU/mL undetectable\] at the end of treatment) for the treatment groups in Cohort 1 (Panel A and B combined) and in Cohort 2 (Panel A and B combined). See "treatment-naïve" defined above.

The table below shows the number of treatment-experienced participants combined (non-responders and relapsers, see defined above) with viral relapse, defined as having confirmed detectable plasma level of HCV ribonucleic acid (RNA) during the follow-up period in participants with undetectable plasma HCV RNA (less than 25 IU/mL undetectable) at the end of treatment who received TMC435 or placebo coadministered with ribavirin for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22.

The table below shows the number of treatment-naïve participants with an SVR to treatment (defined as having an undetectable plasma level of HCV ribonucleic acid after the last planned dose of treatment) for the treatment groups in Cohort 1 (Panel A and B combined) and in Cohort 2 (Panel A and B combined). SVR was measured at 4, 8, 12, and 24 weeks after the last dose of treatment (SVR4, SVR8, SVR12, and SVR24, respectively). See "treatment-naïve" defined above.

The table below shows the number of treatment-experienced participants (non-responders and relapsers, see defined above) in each treatment group in Cohort 4, Panel C and in Cohort 5, Panel D with an SVR to treatment defined as having an undetectable plasma level of HCV ribonucleic acid after the last planned dose of the entire treatment regimen. SVR was measured at 4, 8, 12, and 24 weeks after the last dose of treatment (SVR4, SVR8, SVR12, and SVR24, respectively).

The table below shows the mean (standard deviation) Cmax for treatment-naïve participants at selected time points who were treated with TMC435 for 7 days followed by TMC435 coadministered with ribavirin for 21 days + peginterferon alpha-2a (PegIFNα-2a) on Days 8, 15, and 22 (Panel A) and with TMC435 coadministered with ribavirin for 28 days + PegIFNα-2a on Days 1, 8, 15, and 22 (Panel B). See "treatment-naïve" defined above. The number of participants analyzed at Day 28 in the 6 treatment groups listed below from left to right were 9, 8, 7, 9, 9, and 10.

The table below shows the mean (standard deviation) Cmax for treatment-experienced participants (non-responders and relapsers, see defined above) following treatment with TMC435 coadministered with ribavirin for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22. The number of participants analyzed at Day 28 in the 4 treatment groups listed below from left to right were 8, 8, 10, and 3.

The table below shows mean (standard deviation) of C0h of TMC435 at selected time points following treatment with TMC435 for 7 days followed by TMC435 coadministered with ribavirin for 21 days + peginterferon alpha-2a (PegIFNα-2a) on Days 8, 15, and 22 (Panel A) or with TMC435 coadministered with ribavirin for 28 days + PegIFNα-2a on Days 1, 8, 15, and 22 (Panel B) in treatment-naïve participants (see "treatment-naïve" defined above).The number of participants analyzed at Day 28 in the 6 treatment groups listed below from left to right were 9, 9, 8, 9, 9, and 10.

The table below shows mean (standard deviation) of C0h for treatment-experienced participants (non-responders and relapsers, see defined above) following treatment with TMC435 coadministered with ribavirin for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22. The number of participants analyzed at Day 2 and Day 28 differed as follows: At Day 2, the number of participants in the 4 treatment groups (from left to right) were 8, 7, 10, and 5; the number of participants analyzed at Day 28 in the 4 treatment groups (from left to right) were 9, 8, 10, and 4.

The table below shows mean (standard deviation)of Css,av for TMC435 in treatment-naïve HCV-infected participants at selected time points administered TMC435 for 7 days followed by TMC435 coadministered with ribavirin for 21 days + peginterferon alpha-2a (PegIFNα-2a) on Days 8, 15, and 22 (Panel A) and with TMC435 coadministered with ribavirin for 28 days + PegIFNα-2a on Days 1, 8, 15, and 22 (Panel B). See "treatment-naïve" defined above. The number of participants analyzed at Day 28 in the 6 treatment groups listed below from left to right were 9, 8, 7, 9, 9, and 10.

The table below shows mean (standard deviation) of Css,av for TMC435 in treatment-experienced HCV-infected participants (non-responders and relapsers, see defined above) at selected time points following treatment with TMC435 coadministered with ribavirin for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22.

The table below shows mean (standard deviation) values of the area under the plasma concentration-time curve from time of administration to 24 hours after dosing for TMC435 in treatment-naïve HCV-infected participants administered TMC435 for 7 days followed by TMC435 coadministered with ribavirin for 21 days + peginterferon alpha-2a (PegIFNα-2a) on Days 8, 15, and 22 (Panel A) and with TMC435 coadministered with ribavirin for 28 days + PegIFNα-2a on Days 1, 8, 15, and 22 (Panel B).The number of participants analyzed at Day 28 in the 6 treatment groups listed below from left to right were 9, 8, 7, 9, 9, and 10.

The table below shows mean (standard deviation) values of the area under the plasma concentration-time curve from time of administration to 24 hours after dosing for TMC435 in treatment-experienced HCV-infected participants considered non-responders (participants who achieved less than a 2 log10 IU/mL decline from baseline in plasma HCV ribonucleic acid (RNA) levels after 12 weeks of previous interferon \[IFN\]-based therapy \[pegylated or non-pegylated\]) or relapsers (defined as a participant with undetectable plasma HCV RNA at the end of treatment of previous IFN-based therapy and subsequent confirmed detectable plasma HCV RNA levels during follow-up at selected time points following treatment with TMC435 coadministered with ribavirin (RBV) for 28 days + peginterferon alpha-2a (PegIFNα-2a) on Days 1, 8, 15, and 22. The number of participants analyzed at Day 28 in the 4 treatment groups listed below from left to right was 8, 7, 10, and 3.