Safety and immunogenicity of the epicutaneous reactivation of pertussis toxin immunity in healthy adults: a phase I, randomized, double-blind, placebo-controlled trial
O Chatzis, G Blanchard-Rohner, L Mondoulet, B Pelletier, A De Gea-Hominal, M Roux, A Huttner, P L Hervé, M Rohr, A Matthey, G Gutknecht, B Lemaître, C Hayem, H T Pham, W Wijagkanalan, P H Lambert, P H Benhamou, C A Siegrist, O Chatzis, G Blanchard-Rohner, L Mondoulet, B Pelletier, A De Gea-Hominal, M Roux, A Huttner, P L Hervé, M Rohr, A Matthey, G Gutknecht, B Lemaître, C Hayem, H T Pham, W Wijagkanalan, P H Lambert, P H Benhamou, C A Siegrist
Abstract
Objectives: Protection induced by acellular vaccines can be short, requiring novel immunization strategies. Objectives of this study were to evaluate safety and capacity of a recombinant pertussis toxin (PTgen) -coated Viaskin® epicutaneous patch to recall memory responses in healthy adults.
Methods: This double-blind, placebo-controlled randomized trial (Phase I) assessed the safety and immunogenicity of PTgen administered on days 0 and 14 to healthy adults using Viaskin® patches applied directly or after epidermal laser-based skin preparation. Patch administration was followed by Boostrix®dTpa on day 42. Antibodies were assessed at days 0, 14, 28, 42 and 70.
Results: Among 102 volunteers enrolled, 80 received Viaskin-PT (Viaskin-PT 25 μg (n = 25), Viaskin-PT 50 μg (n = 25), laser + Viaskin-PT 25 μg (n = 5), laser + Viaskin-PT 50 μg (n = 25)), Viaskin-placebo (n = 10) or laser + Viaskin-placebo (n = 2). Incidence of adverse events was similar across groups (any local event: 21/25 (84.0%), 24/25 (96.0%), 4/5 (80.0%), 24/25 (96.0%), 8/10 (80.0%), 10/12 (83.0%), respectively). Direct application induced no detectable response. On day 42, PT-IgG geometric mean concentrations were significantly higher following laser + Viaskin-PT 25 μg and 50 μg (139.87 (95% CI 87.30-224.10) and 121.76 (95% CI 95.04-156.00), respectively), than laser + Viaskin-placebo (59.49, 95% CI 39.37-89.90). Seroresponse rates were higher following laser + Viaskin-PT 25 μg (4/5 (80.0%), 95% CI 28.4-99.5) and 50 μg (22/25 (88.0%), 95% CI 68.8-97.5) than laser + Viaskin-placebo (0/12 (0.0%), 95% CI 0.0-26.5).
Conclusions: Viaskin-PT applied after laser-based epidermal skin preparation showed encouraging safety and immunogenicity results: anti-PT booster responses were not inferior to those elicited by Boostrix®dTpa. This study is registered at ClinicalTrials.gov (NCT03035370) and was funded by DBV Technologies.
Keywords: Epicutaneous vaccination; Immune response; Needleless vaccine; Pertussis vaccine; Randomized trial; Recombined pertussis toxin.
Copyright © 2020 The Authors. Published by Elsevier Ltd.. All rights reserved.
Source: PubMed