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. 1993 Jul;61(7):2945-51.
doi: 10.1128/iai.61.7.2945-2951.1993.

Cytoadhesins of Mycoplasma hominis

B Henrich  1 , R C Feldmann, U Hadding
Affiliations

Cytoadhesins of Mycoplasma hominis

B Henrich et al. Infect Immun. 1993 Jul.

Abstract

The mechanism of Mycoplasma hominis adherence to host cells of the urogenital tract was investigated with monoclonal antibodies (MAbs) directed against antigenic surface-localized polypeptides P50, P60, P80, and P100 of cytoadherent M. hominis FBG. A cell enzyme-linked immunosorbent assay was established allowing quantification of cytoadherent mycoplasmas detected by one of the following MAbs: four MAbs directed against P100 (molecular weight, about 100,000), three MAbs against P80, one MAb against P60, and three MAbs against P50. MAb binding to one of the surface proteins resulted in a decrease of mycoplasmal adherence to HeLa cells. To exclude the thesis that this is caused by nonspecific blocking of adherence, P100 and P50 were purified by affinity chromatography and tested instead of intact mycoplasmas in the cell enzyme-linked immunosorbent assay for cytoadherence. Both proteins bound to the surface of the eukaryotic cells. MAb binding to single epitopes of these proteins resulted in inhibition of protein adherence. These experiments strongly suggest that of the four surface-localized proteins at least P100 and P50 are adhesins of M. hominis FBG.

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