Three-year Follow-up of Participants After Administration of Boceprevir or Narlaprevir for the Treatment of Chronic Hepatitis C (P05063)

Browse trials for

• Hepatitis A 2,709
• Hepatitis C 2,321
• Hepatitis C, Chronic 1,073
• Hepatitis 3,380

Hepatitis A

2,709 studies on the registry are indexed under Hepatitis A; 142 are open to participants now.

This study's enrollment of 1,954 is above the median of 100 across 1,886 interventional studies indexed under Hepatitis A.

Lead sponsor

Merck Sharp & Dohme LLC is the lead sponsor of 2,114 studies on the registry; 133 are open to participants now.

Of its 489 completed or terminated interventional studies of FDA-regulated products, 362 (74%) have results posted.

Study arms

• Other
  Participants from Boceprevir Studies

  Participants who previously participated in treatment studies in which boceprevir was administered were subsequently enrolled in Part 1 of the current follow-up study P05063 (NCT00689390). Participants may have received boceprevir or control peginterferon plus ribavirin (PR) in the previous treatment study. No treatment was administered in the current follow-up study.

  Biological: Boceprevir · Biological: Peginterferon alfa-2b · Drug: Ribavirin · Other: Blood/Plasma Collection

• Other
  Participants from Narlaprevir Studies

  Participants who previously participated in treatment studies in which narlaprevir was administered were subsequently enrolled in Part 2 of the current follow-up study P05063 (NCT00689390). Participants may have received narlaprevir or control PR in the previous treatment study. No treatment was administered in the current follow-up study.

  Biological: Narlaprevir · Biological: Peginterferon alfa-2b · Drug: Ribavirin · Other: Blood/Plasma Collection

Interventions

• BiologicalBoceprevir

  In previous treatment studies, boceprevir was administered as specified by the protocol. No treatment was administered on the current follow-up study (P05063, NCT00689390).

  Also known as: SCH 503034

• BiologicalNarlaprevir

  In previous treatment studies, narlaprevir was administered as specified by the protocol. No treatment was administered on the current follow-up study (P05063, NCT00689390).

  Also known as: SCH 900518

• BiologicalPeginterferon alfa-2b

  In previous treatment studies, peginterferon alfa-2b was administered as specified by the protocol. No treatment was administered on the current follow-up study (P05063, NCT00689390).

  Also known as: PEG-Intron®, SCH 054031

• DrugRibavirin

  In previous treatment studies, ribavirin was administered as specified by the protocol. No treatment was administered on the current follow-up study (P05063, NCT00689390).

  Also known as: Rebetol®

• OtherBlood/Plasma Collection

  Blood samples were collected at all visits during the LTFU for blood chemistry and hematology. Plasma samples were collected at all visits as appropriate from participants who were sustained responders at the end of FU in the previous treatment protocol for HCV-RNA PCR and HCV sequence analysis.

Primary outcomes

1. Number of Participants With Relapse During the LTFU Among Sustained Responders From Previous Treatment Studies With Boceprevir or Narlaprevir (Durability of Virologic Response)

   Durability of response was assessed by the number of participants who relapsed during the LTFU among those that had achieved sustained virologic response (SVR) by 24 weeks after treatment with boceprevir or narlaprevir in a previous Phase 1, 2, or 3 treatment study. In the current LTFU, participants were classified based on the last Hepatitis C Virus ribonucleic acid (HCV-RNA) result available at the time of the data cut-off date as follows: A participant was classified as a sustained virologic responder at a given time point if serum HCV-RNA was undetectable at that time point and there had not been a positive HCV-RNA since the participant was determined to have achieved SVR in the previous study. A participant was classified as a relapser if they were a sustained virologic responder in the previous treatment study and became serum HCV-RNA positive with no subsequent negative results during LTFU.

   Time frame: From End Of Treatment (EOT) date in the previous treatment study to the first date of a positive HCV RNA result for relapsers or the last contact date for non-relapsers in the LTFU (up to 3.5 years)

2. Kaplan-Meier Exposure-adjusted Relapse Rate

   The distribution of time to relapse was summarized using Kaplan-Meier estimates for all participants who were sustained responders at 24 weeks post-treatment in the previous study. Exposure Adjusted Relapse Rate = 1000 × (number of relapses) / (Total exposure time in years). Total exposure time in years = \[(total number of days from last day of treatment to the last follow-up day for all subjects who did not relapse) + (total number of days from last day of treatment to the day of relapse for those who relapsed)\] / 365.25 days \[for 1 year\].

   Time frame: From EOT date in the previous treatment study to the first date of a positive HCV RNA result for relapsers or the last contact date for non-relapsers in the LTFU (up to 3.5 years)

3. Number of Participants With HCV Treatment-Emergent Resistance Associated Variants (TE-RAVs) of NS3/4A Protease Loci

   Plasma samples of all participants receiving at least one dose of study medication in a previous treatment protocol were evaluated by population sequencing and analyzed to detect amino acid variants in the NS3/4A protease known to be associated with reduced susceptibility to boceprevir and narlaprevir. RAVs in the NS3/4A protease gene were evaluated at 12 loci (V36, Q41, F43, T54, V55, V107, R155, A156, V158, D168, I/V170 and M175) on the basis of in vitro studies. A TE-RAV was defined as a RAV not present at baseline and that had not returned to wild type (WT) while the participant was still on treatment. The number of participants with TE-RAVS detected at the EOT in the previous treatment study are reported below, followed by those participants with TE-RAVS that returned to WT during the LTFU (among those with detected TE-RAVS).

   Time frame: From EOT in the previous treatment study to the last available date in the LTFU (up to 3.5 years)

4. Number of Participants With Serious Adverse Events (SAEs) Reported During the LTFU

   Long-term safety was assessed based on the SAEs reported during the LTFU period. An SAE was any adverse drug or biologic or device experience occurring at any dose that resulted in any of the following outcomes: death, life-threatening AE, persistent or significant disability/incapacity, required in-patient hospitalization or prolongs hospitalization, congenital anomaly or birth defect. Important medical events that did not result in any of these outcomes could still be considered SAEs if they jeopardized the participant and/or required medical/surgical intervention, based on appropriate medical judgment. Grade 4 laboratory abnormalities and out of normal range liver function tests that were not accompanied by clinical manifestations were NOT considered SAEs.

   Time frame: From enrollment in the LTFU study to the last available date in the LTFU study (up to 3 years)

5. Number of Participants That Discontinued the LTFU Due to SAEs

   An SAE was any adverse drug or biologic or device experience occurring at any dose that resulted in any of the following outcomes: death, life-threatening AE, persistent or significant disability/incapacity, required in-patient hospitalization or prolongs hospitalization, congenital anomaly or birth defect. Important medical events that did not result in any of these outcomes could still be considered SAEs if they jeopardized the participant and/or required medical/surgical intervention, based on appropriate medical judgment. Grade 4 laboratory abnormalities and out of normal range liver function tests that were not accompanied by clinical manifestations were NOT considered SAEs.

   Time frame: From enrollment in the LTFU study to the last available date in the LTFU study (up to 3 years)

Baseline characteristics

Publications

• Howe AY, Long J, Nickle D, Barnard R, Thompson S, Howe J, Alves K, Wahl J. Long-term follow-up of patients receiving boceprevir for treatment of chronic hepatitis C. Antiviral Res. 2015 Jan;113:71-8. doi: 10.1016/j.antiviral.2014.10.010. Epub 2014 Oct 24. PubMed 25446895 ↗
• Barnard R, Chopra A, James I, Blinco J, Watson MW, Jabara CB, Hazuda D, Lemon SM, Mallal S, Gaudieri S. Primer ID ultra-deep sequencing reveals dynamics of drug resistance-associated variants in breakthrough hepatitis C viruses: relevance to treatment outcome and resistance screening. Antivir Ther. 2016;21(7):567-577. doi: 10.3851/IMP3056. Epub 2016 May 24. PubMed 27219495 ↗

Individual participant data

Plan to share: Yes — https://www.merck.com/clinical-trials/pdf/ProcedureAccessClinicalTrialData.pdf