A Study to Evaluate Safety and Immunogenicity of 1 Booster Dose of 1790GAHB Vaccine in Healthy Adults Primed With 3 Doses of 1790GAHB Vaccine in Study H03_01TP Compared to 1 Vaccination of 1790GAHB in Either Subjects Who Received Placebo in the Same Study or naïve Subjects Not Part of H03_01TP Study

Summary

GVGH Shigella Sonnei 1970GAHB is a vaccine aimed at preventing the disease caused by Shigella sonnei. A post-hoc analysis of subjects who participated in the parent study showed significantly different responses in subjects with detectable versus undetectable antibody titres at baseline, suggesting the possibility that the vaccine might not be sufficiently immunogenic in completely naïve adults. This study was then designed to further characterize the immunogenicity profile of the vaccine and to evaluate whether it was able to induce an immunological memory response.

Timeline

Start

2017-03-16

Primary completion

2017-08-31

Completion

2017-08-31

Publications

• Background Launay O, Ndiaye AGW, Conti V, Loulergue P, Scire AS, Landre AM, Ferruzzi P, Nedjaai N, Schutte LD, Auerbach J, Marchetti E, Saul A, Martin LB, Podda A. Booster Vaccination With GVGH Shigella sonnei 1790GAHB GMMA Vaccine Compared to Single Vaccination in Unvaccinated Healthy European Adults: Results From a Phase 1 Clinical Trial. Front Immunol. 2019 Mar 8;10:335. doi: 10.3389/fimmu.2019.00335. eCollection 2019.
• Micoli F, Rossi O, Conti V, Launay O, Scire AS, Aruta MG, Nakakana UN, Marchetti E, Rappuoli R, Saul A, Martin LB, Necchi F, Podda A. Antibodies Elicited by the Shigella sonnei GMMA Vaccine in Adults Trigger Complement-Mediated Serum Bactericidal Activity: Results From a Phase 1 Dose Escalation Trial Followed by a Booster Extension. Front Immunol. 2021 May 4;12:671325. doi: 10.3389/fimmu.2021.671325. eCollection 2021.

Drugs

Indications