First-In-Human Study of ChAdOx1-HBV & MVA-HBV Vaccines (VTP-300) for

Status Active, not recruiting

Clinical Trial Summary

This is an open-label study to determine the safety, tolerability and immunogenicity of ChAdOx1-HBV and MVA-HBV vaccines, with or without nivolumab, in patients with chronic HBV who are virally suppressed with oral anti-viral therapies.

Clinical Trial Description

This is a multi-centre study conducted in 52 participants, who will each be administered 2 vaccine injections (IM) on Day 0 and Day 28 as follows: Group 1: MVA-HBV + MVA-HBV (now closed) Group 2: ChAdOx1-HBV + MVA-HBV Group 3: ChAdOx1-HBV + MVA-HBV + nivolumab (IV infusion) Group 4: ChAdOx1-HBV + nivolumab + MVA-HBV + nivolumab (now closed) Participants are randomised to treatment as the groups are initiated with a 1:1:1:1 allocation. Version 6.0 of the study protocol has closed Groups 1 and 4 to further randomisation; recruitment will now be in a 1:1 ratio between Groups 2 and 3 only. A sentinel participant is dosed in Group 1, with further participants in Group 1 only being dosed at least 48h later. Group 2 is initiated following a Day 7 safety assessment of the first 6 participants in Group 1. Groups 3 and 4 are initiated following a Day 7 safety assessment of the first 6 participants in Group 2. The primary objective of the study is to determine the safety and reactogenicity of the treatment regimens; this will be assessed by analysis of the incidence and severity of (serious) adverse events and any changes in laboratory values and vital signs. The secondary objectives of the study are the determination of the immunogenicity of the ChAdOx1-HBV and MVA-HBV vaccines and the impact of PD-blockade, as well as the effect on HBV markers; these are assessed by measurements of the magnitude and avidity of HBV-specific CD4+ and CD8+ T cells and the magnitude of HBV markers. Following first vaccination, participants remain in the study for 9 months and attend clinic visits for vaccination and assessments on Days 0, 7, 28, 35 and Months, 3, 6 and 9. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT04778904
Study type	Interventional
Source	Vaccitech (UK) Limited
Contact
Status	Active, not recruiting
Phase	Phase 1/Phase 2
Start date	December 22, 2020
Completion date	February 21, 2023

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See also
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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

First-In-Human Study of ChAdOx1-HBV & MVA-HBV Vaccines (VTP-300) for Chronic HBV

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms