Abstract

Shigella is a leading cause of moderate to severe diarrhea worldwide and of diarrhea-associated deaths in children under 5 years of age in low-and middle-income countries. A vaccine against shigellosis is in high demand. SF2a-TT15, a synthetic carbohydrate-based conjugate vaccine candidate against Shigella flexneri 2a (SF2a) was found safe and strongly immunogenic in adult volunteers. Here, SF2a-TT15 at 10 µg oligosaccharide (OS) vaccine dose is shown to induce a sustained immune response in magnitude and functionality in the majority of volunteers followed up 2 and 3 years post-vaccination. High levels of either one of the humoral parameters as well as the number of specific-IgG memory B-cells determined 3 months after vaccination were good predictors of the durability of the immune response. This study is the first to examine the long-term durability of antibody functionality and memory B-cell response induced by a Shigella vaccine candidate.

Details

Title
A Shigella flexneri 2a synthetic glycan-based vaccine induces a long-lasting immune response in adults
Author
Meron-Sudai, Shiri 1 ; Asato, Valeria 1 ; Adler, Amos 2 ; Bialik, Anya 1 ; Goren, Sophy 1 ; Ariel-Cohen, Ortal 1 ; Reizis, Arava 1 ; Mulard, Laurence A. 3 ; Phalipon, Armelle 4 ; Cohen, Dani 1 

 Tel Aviv University, Ramat Aviv, School of Public Health, Sackler Faculty of Medicine, Tel Aviv, Israel (GRID:grid.12136.37) (ISNI:0000 0004 1937 0546) 
 Tel Aviv University, Ramat Aviv, School of Public Health, Sackler Faculty of Medicine, Tel Aviv, Israel (GRID:grid.12136.37) (ISNI:0000 0004 1937 0546); Clinical Microbiology Laboratory, Tel-Aviv Sourasky Medical Center, Tel Aviv, Israel (GRID:grid.413449.f) (ISNI:0000 0001 0518 6922) 
 Institut Pasteur, Université Paris Cité, CNRS UMR3523, Unité de Chimie des Biomolécules, Paris, France (GRID:grid.12136.37) 
 Institut Pasteur, Innovation Lab. Vaccines, Paris, France (GRID:grid.428999.7) (ISNI:0000 0001 2353 6535) 
Pages
35
Publication year
2023
Publication date
2023
Publisher
Nature Publishing Group
e-ISSN
20590105
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2785037982
Copyright
© The Author(s) 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.