Document Detail

Binding of Actinobacillus pleuropneumoniae lipopolysaccharides to glycosphingolipids evaluated by thin-layer chromatography.
MedLine Citation:
PMID:  10496867     Owner:  NLM     Status:  MEDLINE    
The binding profile of Actinobacillus pleuropneumoniae serotypes 1 and 2 to various glycosphingolipids was evaluated by using thin-layer chromatogram overlay. A. pleuropneumoniae whole cells recognized glucosylceramide (Glcbeta1Cer), galactosylceramide (Galbeta1Cer) with hydroxy and nonhydroxy fatty acids, sulfatide (SO(3)-3Galbeta1Cer), lactosylceramide (Galbeta1-4Glcbeta1Cer), gangliotriaosylceramide GgO3 (GalNAcbeta1-4Galbeta1-4Glcbeta1Cer), and gangliotetraosylceramide GgO4 (Galbeta1-3GalNAcbeta1-4Galbeta1-4Glcbeta1Cer) glycosphingolipids. We observed no binding to globoseries, globotriaosylceramide Gb3, globoside Gb4, or Forssman Gb5 glycosphingolipids or to gangliosides GM1, GM2, GM3, GD1a, GD1b, GD3, and GT1b. The A. pleuropneumoniae strains tested also failed to detect phosphatidylethanolamine or ceramide. Interestingly, extracted lipopolysaccharide (LPS) of serotype 1 and serotype 2 as well as detoxified LPS of serotype 1 showed binding patterns similar to that of whole bacterial cells. Binding to GlcCer, GalCer, sulfatide, and LacCer, but not to GgO3 and GgO4 glycosphingolipids, was inhibited after incubation of the bacteria with monoclonal antibodies against LPS O antigen. These findings indicate the involvement of LPS in recognition of three groups of glycosphingolipids: (i) GlcCer and LacCer, where glucose is probably an important saccharide sequence required for LPS binding; (ii) GalCer and sulfatide glycosphingolipids, where the sulfate group is part of the binding epitope of the isoreceptor; and (iii) GgO3 and GgO4, where GalNacbeta1-4Gal disaccharide represents the minimal common binding epitope. Taken together, our results indicate that A. pleuropneumoniae LPS recognize various saccharide sequences found in different glycosphingolipids, which probably represents a strong virulence attribute.
M Abul-Milh; S E Paradis; J D Dubreuil; M Jacques
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Infection and immunity     Volume:  67     ISSN:  0019-9567     ISO Abbreviation:  Infect. Immun.     Publication Date:  1999 Oct 
Date Detail:
Created Date:  1999-10-14     Completed Date:  1999-10-14     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  0246127     Medline TA:  Infect Immun     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  4983-7     Citation Subset:  IM    
Groupe de Recherche sur les Maladies Infectieuses du Porc and Départément de Pathologie et Microbiologie, Faculté de Médecine Vétérinaire, Université de Montréal, St-Hyacinthe, Québec, Canada J2S 7C6.
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MeSH Terms
Actinobacillus pleuropneumoniae / pathogenicity*
Antibodies, Monoclonal / immunology
Chromatography, Thin Layer
Glycosphingolipids / metabolism*
Lipopolysaccharides / metabolism*
O Antigens / metabolism
Reg. No./Substance:
0/Antibodies, Monoclonal; 0/Glycosphingolipids; 0/Lipopolysaccharides; 0/O Antigens

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