title: Distribution and immunochemical specificities of fimbriae of Porphyromonas gingivalis and related bacterial species.
abstract: Rabbit polyclonal antibody (Poly-1) and mouse monoclonal antibodies (mAbs) TO-11, TO-14 and TO-M1 specific for Porphyromonas gingivalis 381 fimbriae were prepared. Poly-1 and the 3 mAbs were screened for their reactivity with whole cells oral and nonoral black-pigmented bacterial species by enzyme-linked immunosorbent assay (ELISA) and the binding experiment using [125I]Poly-1 and [125I]mAbs. ELISA revealed that Poly-1 definitely reacted with whole cells of all the 11 strains of P. gingivalis tested. However, 8 of 11 P. gingivalis strains reacted with mAbs TO-11, TO-14 and TO-M1. These results were confirmed by the specific binding of radiolabelled Poly-1 and mAb TO-11 to the 8 strains. The M(r) of the fimbrial subunit protein (fimbrilin) isolated and purified from P. gingivalis strains 381, BH18/10, HW24D-1, 6/26 and OMZ 314 was 41 kDa by sodium dodecylsulfate-polyacrylamide gel electrophoresis. It was found by immunoblotting that mAbs TO-11 and TO-14/TO-M1 recognized different epitopes of fimbrial protein from P. gingivalis strains. Immunoelectron micrographs of whole cells and the purified fimbriae of P. gingivalis strains visualized similar serotype-specific antibody bindings to the fimbriae. These results indicate that 11 strains of P. gingivalis could be divided into at least 2 separate groups based on the immunochemical specificities of the fimbriae.
authors.affiliation: Osaka University Faculty of Dentistry, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ogawa
authors.forename: T
authors.initials: T
authors.lastname: Mukai
authors.forename: K
authors.initials: K
authors.lastname: Yasuda
authors.forename: H
authors.initials: H
authors.lastname: Shimauchi
authors.forename: Y
authors.initials: Y
authors.lastname: Toda
authors.forename: S
authors.initials: S
authors.lastname: Hamada
mesh_terms: D000818:Animals; D001422:Bacterial Adhesion; D001426:Bacterial Proteins; D001439:Bacteroides / Q000145:classification / Q000276:immunology; D015153:Blotting, Western; D004797:Enzyme-Linked Immunosorbent Assay; D000939:Epitopes; D010861:Fimbriae, Bacterial / Q000276:immunology* / Q000648:ultrastructure; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D010510:Periodontal Diseases / Q000276:immunology / Q000382:microbiology; D016966:Porphyromonas gingivalis / Q000276:immunology*; D013045:Species Specificity
chemical_list: D001426:Bacterial Proteins; D000939:Epitopes