Staged Phase I/II Hepatitis C Prophylactic Vaccine
Summary
A two stage, phase I/II, double-blinded, randomized, placebo-controlled study of hepatitis C virus (HCV)uninfected male and female injection drug users (IDU) aged 18 to 45. AdCh3NSmut1 and MVA-NSMut HCV vaccine will be administered to 68 (+/-4) volunteers in stage 1. A planned interim analysis of safety and immunogenicity will be conducted. If no safety signal is detected and there is evidence of a measurable immune response to HCV then 472 (+/-4) volunteers will be enrolled in stage 2. Primary objectives are to 1) assess the safety of AdCh3NSmut1 and MVA-NSmut compared to placebo when administered to HCV-uninfected IDUs and 2) determine if AdCh3NSmut1 and MVA-NSmut HCV vaccines will reduce incidence of chronic HCV infection compared to placebo among HCV-uninfected IDUs. Planned study duration is approx 63 months (accrual time, 2 months vaccination, 18 months follow-up, and 9 months extended observation for subjects becoming viremic in the last month of follow-up).
Timeline
- Start
- 2012-03-06
- Primary completion
- 2018-05-25
- Completion
- 2018-05-25
Outcome
Missed primary endpoint
paper There was no significant difference in the incidence of chronic HCV infection between the groups. PMID 33567193 ↗
paper but it did not prevent chronic HCV infection. PMID 33567193 ↗
Publications
- Page K, Melia MT, Veenhuis RT, Winter M, Rousseau KE, Massaccesi G, Osburn WO, Forman M, Thomas E, Thornton K, Wagner K, Vassilev V, Lin L, Lum PJ, Giudice LC, Stein E, Asher A, Chang S, Gorman R, Ghany MG, Liang TJ, Wierzbicki MR, Scarselli E, Nicosia A, Folgori A, Capone S, Cox AL. Randomized Trial of a Vaccine Regimen to Prevent Chronic HCV Infection. N Engl J Med. 2021 Feb 11;384(6):541-549. doi: 10.1056/NEJMoa2023345.
- Salinas E, Boisvert M, Upadhyay AA, Bedard N, Nelson SA, Bruneau J, Derdeyn CA, Marcotrigiano J, Evans MJ, Bosinger SE, Shoukry NH, Grakoui A. Early T follicular helper cell activity accelerates hepatitis C virus-specific B cell expansion. J Clin Invest. 2021 Jan 19;131(2):e140590. doi: 10.1172/JCI140590.
Drugs
| Evaluation | Drug | Modality | Dose | Route |
|---|---|---|---|---|
| Subject | AdCh3NSmut1 | Vaccine | 2.5e+10 unknown | Intramuscular |
| Subject | MVA-NSmut | Vaccine | 1.8e+08 unknown | Intramuscular |