Stable expression of lipooligosaccharide antigens during attachment, internalization, and intracellular processing of Neisseria gonorrhoeae in infected epithelial cells.

Infection and Immunity
J F WeelJ P van Putten

Abstract

Immunoelectron microscopy enables the detection and localization of bacterial antigens during in vitro infection (J.F.L. Weel and J.P.M. van Putten, Microb. Pathog. 4:213-222, 1988). In this study, we have used this method to get information on the role of lipooligosaccharides (LOS) in the pathogenesis of neisserial infections at the mucosal level. Ultrathin cryosections of Chang conjunctive epithelial cells infected with Neisseria gonorrhoeae (3 to 18 h) were incubated with LOS-specific monoclonal antibodies and gold-labeled protein A and viewed in the electron microscope. Our results demonstrate that the probed LOS determinants are stably expressed during the adherence, internalization, and intracellular processing of the bacteria. There was no indication of an adaptation of the gonococcal LOS expression to the host cell environment or of a degradation of the probed epitopes. The gold particles, representing LOS molecules, were predominantly located at the bacterial membranes, but sometimes the host cell plasma membrane was labeled as well, suggesting that LOS or LOS-containing membrane fragments interacted with the eucaryotic cells. This was confirmed when purified LOS was added to the cells. Two hours after LOS exposure, go...Continue Reading

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Citations

May 1, 1993·Molecular Microbiology·B D RobertsonJ P van Putten
Jan 1, 1995·Molecular Microbiology·E T SchwanJ P van Putten
Jan 1, 1992·Electron Microscopy Reviews·L L Graham
Dec 1, 1991·Microbiological Reviews·T J Beveridge, L L Graham

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