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. 1995 Apr;63(4):1415–1420. doi: 10.1128/iai.63.4.1415-1420.1995

A Mycoplasma strain F38 growth-inhibiting monoclonal antibody (WM-25) identifies an epitope on a surface-exposed polysaccharide antigen.

F R Rurangirwa 1, A Wambugu 1, S M Kihara 1, T C McGuire 1
PMCID: PMC173168  PMID: 7534276

Abstract

Monoclonal antibody (MAb) WM-25 differentiates by in vitro growth inhibition Mycoplasma capricolum subsp. capripneumoniae (Mycoplasma strain F38), which causes contagious carpine pleuropneumonia, from other Mycoplasma spp. (F. R. Rurangirwa, T. C. McGuire, A. J. Musoke, and A. Kibor, Infect. Immun. 55:3219-3220, 1987). The antigen identified by MAb WM-25 was isolated from solubilized Mycoplasma strain F38 organisms by MAb WM-25 affinity chromatography and was stained with Schiff's reagent, but not with Coomassie blue, after separation by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Treatment of purified F38 polysaccharide with periodate abolished binding with MAb WM-25, and MAb WM-25 binding was blocked with laminarin, a complex oligosaccharide with beta(1-->3) sugar linkages. Purified F38 polysaccharide blocked both growth inhibition and agglutination of live F38 organisms caused by MAb WM-25 and rabbit antiserum to F38 organisms. The results in this paper demonstrate that MAb WM-25 binds a periodate-sensitive epitope on the F38 polysaccharide which is also exposed on the surface of Mycoplasma strain F38. Because MAb WM-25 also causes in vitro growth inhibition of F38, the reactive polysaccharide epitope may induce protective immune responses.

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Selected References

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