Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/130959
Title: Expression of histo-blood group antigens by lipopolysaccharides of Helicobacter pylori strains from Asian hosts: The propensity to express type 1 blood-group antigens
Authors: Monteiro, M.A.
Zheng, P.-Y.
Ho, B. 
Yokota, S.-I.
Amano, K.-I.
Pan, Z.-J.
Berg, D.E.
Chan, K.H.
MacLean, L.L.
Perry, M.B.
Keywords: Helicobacter pylori
Histoblood groups
Lipopolysaccharides
Molecular mimicry
Structural determination
Issue Date: 2000
Source: Monteiro, M.A., Zheng, P.-Y., Ho, B., Yokota, S.-I., Amano, K.-I., Pan, Z.-J., Berg, D.E., Chan, K.H., MacLean, L.L., Perry, M.B. (2000). Expression of histo-blood group antigens by lipopolysaccharides of Helicobacter pylori strains from Asian hosts: The propensity to express type 1 blood-group antigens. Glycobiology 10 (7) : 701-713. ScholarBank@NUS Repository.
Abstract: Past studies have shown that the cell surface lipopolysaccharides (LPSs) of the ubiquitous human gastric pathogen Helicobacter pylori (a type 1 carcinogen) isolated from people residing in Europe and North America express predominantly type 2 Lewis x (Le(x)) and Le(y) epitopes and, infrequently, type 1 Le a, Le b, and Le(d) antigens. This production of Lewis blood-group structures by H. pylori LPSs, similar to those found in the surfaces of human gastric cells, allows the bacterium to mimic its human niche. In this study, LPSs of H.pylori strains extracted from patients living in China, Japan, and Singapore were chemically and serologically analyzed. When compared with Western H.pylori LPSs, these Asian strains showed a stronger tendency to produce type 1 blood groups. Of particular interest, and novel observations in H.pylori, the O-chain regions of strains F-58C and R-58A carried type 1 Le a without the presence of type 2 Le(x), strains R-7A and H607 were shown to have the capability of producing the type 1 blood group A antigen, and strains CA2, H507, and H428 expressed simultaneously the difucosyl isomeric antigens, type 1 Le b and type 2 Le(y). The apparent proclivity for the production of type 1 histo-blood group antigens in Asian H.pylori LPSs, as compared with Western strains, may be an adaptive evolutionary effect in that differences in the gastric cell surfaces of the respective hosts might be significantly dissimilar to select for the formation of different LPS structures on the resident H.pylori strain.
Source Title: Glycobiology
URI: http://scholarbank.nus.edu.sg/handle/10635/130959
ISSN: 09596658
Appears in Collections:Staff Publications

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