Helicobacter pylori lipopolysaccharide structural domains and their recognition by immune proteins revealed with carbohydrate microarrays
authors Silva, LM; Correia, VG; Moreira, ASP; Domingues, MRM; Ferreira, RM; Figueiredo, C; Azevedo, NF; Marcos-Pinto, R; Carneiro, F; Magalhaes, A; Reis, CA; Feizi, T; Ferreira, JA; Coimbra, MA; Palma, AS
nationality International
journal CARBOHYDRATE POLYMERS
author keywords Helicobacter pylori; Lipopolysaccharides; Mass spectrometry; Carbohydrate microarrays; Host immune receptors; Human sera
keywords GASTRIC EPITHELIAL-CELLS; O-ANTIGEN CHAIN; BLOOD-GROUP-A; MOLECULAR MIMICRY; ANTIBODY-RESPONSE; GROUP-B; GROUP-H; STRAIN; LEWIS; SPECIFICITY
abstract The structural diversity of the lipopolysaccharides (LPSs) from Helicobacter pylori poses a challenge to establish accurate and strain-specific structure-function relationships in interactions with the host. Here, LPS structural domains from five clinical isolates were obtained and compared with the reference strain 26695. This was achieved combining information from structural analysis (GC-MS and ESI-MSn) with binding data after interrogation of a LPS-derived carbohydrate microarray with sequence-specific proteins. All LPSs expressed Lewisx/y and N-acetyllactosamine determinants. Ribans were also detected in LPSs from all clinical isolates, allowing their distinction from the 26695 LPS. There was evidence for 1,3-D-galactans and blood group H-type 2 sequences in two of the clinical isolates, the latter not yet described for H. pylori LPS. Furthermore, carbohydrate microarray analyses showed a strain-associated LPS recognition by the immune lectins DC-SIGN and galectin-3 and revealed distinctive LPS binding patterns by IgG antibodies in the serum from H. pylori-infected patients.
publisher ELSEVIER SCI LTD
issn 0144-8617
isbn 1879-1344
year published 2021
volume 253
digital object identifier (doi) 10.1016/j.carbpol.2020.117350
web of science category 12
subject category Chemistry, Applied; Chemistry, Organic; Polymer Science
unique article identifier WOS:000596248700001
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journal analysis (jcr 2019):
journal impact factor 7.182
5 year journal impact factor 6.89
category normalized journal impact factor percentile 96.638
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