ISSN:
1573-4986
Keywords:
Helicobacter pylori
;
human erythrocytes
;
sialic acid
;
polyglycosylceramides
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Helicobacter pylori expresses separate binding characteristics depending on growth conditions, as documented by binding to human erythrocyte glycoconjugates. Cells grown in Ham's F12 liquid medium exhibited a selective sialic acid-dependent binding to polyglycosylceramides, PGCs (Miller-Podraza et al. (1996) Glycoconjugate J 13:453–60). There was no binding to traditional sialylated glycoconjugates like shorter-chain gangliosides, glycophorin or fetuin. However, cells grown on Brucella agar bound both to PGCs and other sialylated glycoconjugates. Fetuin was an effective inhibitor of haemagglutination caused by agar-grown cells, but had no or a very weak inhibitory effect on haemagglutination by F12-grown bacteria. PGCs were strong inhibitors in both cases, while asialofetuin was completely ineffective. The results indicate that H. pylori is able to express two separate sialic acid-dependent specificities, one represented by binding to fetuin, as described before, and another represented by a selective binding to PGCs. Abbreviations: PGCs, polyglycosylceramides; TLC, thin-layer chromatography; SDS PAGE, sodium dodecylsulfate polyacrylamide gel electrophoresis; BSA, bovine serum albumin; C, chloroform; M, methanol. The carbohydrate and glycosphingolipid nomenclatures are according to recommendations of IUPAC-IUB Commission on Biochemical Nomenclature (Lipids (1977) 12:455–68; J Biol Chem (1982) 257:3347–51 and J Biol Chem (1987) 262:13–18).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1018599401772
