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 ...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.展开更多
Carbohydrates play critical roles in mediating many biological processes, such as cell growth, migration, cell-cell adhesion, fertilization, signal transduction and immune response. The increasing demands for the stud...Carbohydrates play critical roles in mediating many biological processes, such as cell growth, migration, cell-cell adhesion, fertilization, signal transduction and immune response. The increasing demands for the study of these molecules greatly facilitate the development of carbohydrate synthesis. Inversion strategies via sulfonyl groups, selective reductions, etc. have been used to synthesize corresponding inverted configurations. This review focuses on the mechanisms of these inversion methods and their applications in constructing amino sugars, rare sugars and E-configurations in glycosylations.展开更多
基金financial support from the National Natural Science Foundation of China(22177041,22277042,22077052,22107037,22207042)the China Postdoctoral Science Foundation(2021M691279)+1 种基金the 111 Project(111-2-06)the Max Planck Society International Partner Group Program,and the China Scholarship Council(CSC)for funding.P.H.S.thanks the Max Plank Society forgenerous financial support.
文摘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.
基金the National Natural Science Foundation of China(No. 21302068)the Natural Science Foundation of Jiangsu Province, China (No. BK20150140)+1 种基金the Fundamental Research Funds for the Central Universities(No. JUSRP51712B)the Public Health Research Center at Jiangnan University(No. JUPH201502)
文摘Carbohydrates play critical roles in mediating many biological processes, such as cell growth, migration, cell-cell adhesion, fertilization, signal transduction and immune response. The increasing demands for the study of these molecules greatly facilitate the development of carbohydrate synthesis. Inversion strategies via sulfonyl groups, selective reductions, etc. have been used to synthesize corresponding inverted configurations. This review focuses on the mechanisms of these inversion methods and their applications in constructing amino sugars, rare sugars and E-configurations in glycosylations.
