Volume 42, Issue 3 pp. 243-251
Breaking Report

Immunological Exploration of Helicobacter pylori Serotype O2 O-Antigen by Using a Synthetic Glycan Library

Ming Zhao

Ming Zhao

Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology & School of Life Sciences and Health Engineering, Jiangnan University, Lihu Avenue 1800, Wuxi, Jiangsu, 214122 China

These authors contributed equally.

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Guangzong Tian

Guangzong Tian

Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology & School of Life Sciences and Health Engineering, Jiangnan University, Lihu Avenue 1800, Wuxi, Jiangsu, 214122 China

These authors contributed equally.

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Chunjun Qin

Chunjun Qin

Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology & School of Life Sciences and Health Engineering, Jiangnan University, Lihu Avenue 1800, Wuxi, Jiangsu, 214122 China

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Xiaopeng Zou

Xiaopeng Zou

Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology & School of Life Sciences and Health Engineering, Jiangnan University, Lihu Avenue 1800, Wuxi, Jiangsu, 214122 China

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Peter H. Seeberger

Peter H. Seeberger

Biomolecular Systems Department, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, Potsdam, 14476 Germany

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Jing Hu

Corresponding Author

Jing Hu

Wuxi School of Medicine, Jiangnan University, Lihu Avenue 1800, Wuxi, Jiangsu, 214122 China

E-mail: [email protected]; [email protected]Search for more papers by this author
Jian Yin

Corresponding Author

Jian Yin

Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology & School of Life Sciences and Health Engineering, Jiangnan University, Lihu Avenue 1800, Wuxi, Jiangsu, 214122 China

E-mail: [email protected]; [email protected]Search for more papers by this author
First published: 15 September 2023
Citations: 3

Comprehensive Summary

Helicobacter pylori (H. pylori) infection is a threat to human health. The lipopolysaccharide (LPS) O-antigen holds promise for developing vaccines. It is meaningful to explore the immunological activity of oligosaccharides with different lengths and frameshifts for antigen development. Herein, a glycan library of H. pylori O2 O-antigen containing eight fragments is constructed. After screening with anti-H. pylori O2 LPS sera and patients’ sera by glycan microarray, the disaccharide HPO2G-2b and trisaccharide HPO2G-3a show strong antigenicity and then are separately conjugated with carrier protein CRM197. Both glycoconjugates elicit a robust immunoglobulin G (IgG) immune response in rabbits. The anti-HPO2G-3a IgG antibodies possess a much stronger binding affinity with the LPS and bacteria of H. pylori O2 than the anti-HPO2G-2b IgG antibodies. There is no cross-reaction between both sera IgG antibodies with LPS and bacteria of H. pylori O1, O6, and E. coli. The results demonstrate the trisaccharide HPO2G-3a is a promising candidate for H. pylori vaccine development.image

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