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Prophylactic immunization to Helicobacter pylori infection using spore vectored vaccines

Lookup NU author(s): Dr Duy NguyenORCiD

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

Background: Helicobacter pylori infection remains a major public health threat leading to gastrointestinal illness and increased risk of gastric cancer. Mostly affecting populations in developing countries no vaccines are yet available and the disease is controlled by antimicrobials which, in turn, are driving the emergence of AMR. Materials and Methods: We have engineered spores of Bacillus subtilis to display putative H. pylori protective antigens, urease subunit A (UreA) and subunit B (UreB) on the spore surface. Following oral dosing of mice with these spores, we evaluated immunity and colonization in animals challenged with H. pylori. Results: Oral immunization with spores expressing either UreA or UreB showed antigen-specific mucosal responses (fecal sIgA) including seroconversion and hyperimmunity. Following challenge, colonization by H. pylori was significantly reduced by up to 1-log.ConclusionsThis study demonstrates the utility of bacterial spores for mucosal vaccination to H. pylori infection. The heat stability and robustness of Bacillus spores coupled with their existing use as probiotics make them an attractive solution for either protection against H. pylori infection or potentially for therapy and control of active infection.


Publication metadata

Author(s): Katsande PM, Nguyen VD, Nguyen TLP, Nguyen TKC, Mills G, Bailey DMD, Christie G, Hong HA, Cutting SM

Publication type: Article

Publication status: Published

Journal: Helicobacter

Year: 2023

Volume: 28

Issue: 4

Print publication date: 01/08/2023

Online publication date: 14/06/2023

Acceptance date: 23/05/2023

Date deposited: 12/02/2024

ISSN (print): 1083-4389

ISSN (electronic): 1523-5378

Publisher: Wiley-Blackwell Publishing Ltd

URL: https://doi.org/10.1111/hel.12997

DOI: 10.1111/hel.12997

Data Access Statement: The data that support the findings of this study are available from the corresponding author upon reasonable request.


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Funding

Funder referenceFunder name
MRC
MR/R026262/1
Newton Fund
Vietnam Ministry of Science & Technology (MOST)

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