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Journal articles
DC-SIGN (CD209) recognition of Neisseria gonorrhoeae is circumvented by lipooligosaccharide variation.
Abstract : Neisseria gonorrhoeae (GC) or Escherichia coli HB101 (hereafter referred to as E. coli) expressing opacity (Opa) proteins adhere to human host cells and stimulate phagocytosis as a result of the interaction of certain Opa proteins to carcinoembryonic antigen-related cellular adhesion molecule 1 (CEACAM1; CD66a) receptors. Our experiments show that the Opa-CEACAM1 interaction does not play a significant role in adherence between these bacteria and dendritic cells (DCs). Instead, phagocytosis of GC and E. coli by DCs is mediated by the DC-specific intercellular adhesion molecule-grabbing nonintegrin, (SIGN; CD209) receptor. DC-SIGN recognition and subsequent phagocytosis of GC are limited, however, to a lipooligosaccharide (LOS) mutant (lgtB) of GC. This conclusion is supported by experiments demonstrating that HeLa cells expressing human DC-SIGN (HeLa-DC-SIGN) bind exclusively to and engulf an lgtB mutant of GC, and this interaction is blocked specifically by an anti-DC-SIGN antibody. The experiments suggest that LOS variation may have evolved as a mechanism for GC to avoid phagocytosis by DCs.
https://hal-pasteur.archives-ouvertes.fr/pasteur-01372642
Contributor : Isma Ziani <>
Submitted on : Tuesday, September 27, 2016 - 2:51:00 PM
Last modification on : Monday, January 13, 2020 - 5:08:07 PM
Contributor : Isma Ziani <>
Submitted on : Tuesday, September 27, 2016 - 2:51:00 PM
Last modification on : Monday, January 13, 2020 - 5:08:07 PM
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