Several Carcinoembryonic Antigens (CD66) Serve as Receptors for Gonococcal Opacity Proteins
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Several Carcinoembryonic Antigens (CD66) Serve as Receptors for Gonococcal Opacity Proteins
Neisseria gonorrhoeae (GC) is a human pathogen that adheres to and invades genital surfaces. Although pili are required for the initial adherence, the interaction of GC with epithelial cells is also promoted by a family of outer membrane proteins, the opacity (Opa) proteins such as OpaA protein from strain MS11. Studies have demonstrated that the interaction of the OpaA GC with epithelial cells...
متن کاملGonococcal opacity: lectin-like interactions between Opa proteins and lipooligosaccharide.
Previous evidence from our laboratory suggested that the tight intercellular adhesions between the outer membranes of gonococci displaying the opacity colony phenotype occurred because Opa proteins expressed on one gonococcus adhered to the lipooligosaccharide (LOS) of the opposing bacterium (M.S. Blake, p. 51-66, in G. G. Jackson and H. Thomas, ed., The Pathogenesis of Bacterial Infections, 19...
متن کاملCD66 carcinoembryonic antigens mediate interactions between Opa-expressing Neisseria gonorrhoeae and human polymorphonuclear phagocytes.
Colonization of urogenital tissues by the human pathogen Neisseria gonorrhoeae is characteristically associated with purulent exudates of polymorphonuclear phagocytes (PMNs) containing apparently viable bacteria. Distinct variant forms of the phase-variable opacity-associated (Opa) outer membrane proteins mediate the non-opsonized binding and internalization of N. gonorrhoeae by human PMNs. Usi...
متن کاملCD66 receptor specificity exhibited by neisserial Opa variants is controlled by protein determinants in CD66 N-domains.
Neisseria gonorrhoeae strain MS11 is able to express 11 different opacity (Opa) proteins on its outer surface. A number of these Opa proteins have been shown to function as adhesins through binding of CD66 receptors present on human cells. CD66 antigens, or carcinoembryonic antigen family members, constitute a family of glycoproteins belonging to the immunoglobulin superfamily. Opa variants rec...
متن کاملNonsecreted bacterial proteins induce recall CD8 T cell responses but do not serve as protective antigens.
Secreted or nonsecreted Ag expressed by recombinant Listeria monocytogenes can prime CD8 T cells. However, Ag-specific memory CD8 T cells confer protection against bacteria secreting Ag, but not against bacteria expressing the nonsecreted form of the same Ag. This dichotomy may be explained by a long-standing hypothesis that nonsecreted Ags are less effective than secreted Ags at inducing a pro...
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ژورنال
عنوان ژورنال: Journal of Experimental Medicine
سال: 1997
ISSN: 0022-1007,1540-9538
DOI: 10.1084/jem.185.9.1557