アブストラクト(32巻3/4号:神奈川歯学)

神奈川歯学

Japanese

Title : Porphyromonas gingivalisと口腔常在菌の共凝集に関する研究
Subtitle : 原著
Authors : 宮地良彰, 渡辺清子, 中務朝紀, 梅本俊夫
Authors(kana) :
Organization : 神奈川歯科大学口腔細菌学教室
Journal : 神奈川歯学
Volume : 32
Number : 3/4
Page : 227-240
Year/Month : 1997 / 12
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「緒言」 Porphyromonas gingivalis(P.gingivalis)は, 健常な歯周組織と比較して歯周炎病巣から高頻度に分離され, 歯周炎を惹起する可能性のある種々の病原因子を有することから, 成人性歯周炎の有力な病原菌として注目されている. しかし, 本菌が歯周病原性を発揮するためには, まず, 歯肉溝内の歯面や歯肉溝上皮表面などに付着し, 集落形成を行って, 歯肉縁下歯垢中に定着することが必要と考えられる. 歯肉縁下歯垢には250種以上の細菌が生息していると言われており, それらの細菌の中には歯肉細胞に付着能を持つものと持たないものが知られている. しかし, 単一の細菌としては付着能を持っていなくても, あらかじめ定着している異種の細菌と凝集(共凝集)することにより, 歯肉縁下歯垢形成に関与し, その病原性を発揮する可能性も考えられる. 歯周炎の真性ポケットの細菌叢は, 歯肉炎の発症に伴って形成された仮性ポケットの細菌叢とは異なっており, また, 健康な歯肉溝のそれとも異なっている.
Practice : 歯科学
Keywords : Porphyromonas gingivalis, 共凝集, 口腔常在菌, トリプシン様酵素

English

Title : Coaggregation of Porphyromonas gingivalis with Other Oral Bacteria
Subtitle : Original article
Authors : Yoshiaki MIYAJI, Kiyoko WATANABE, Aki NAKAMU, Toshio Umemoto
Authors(kana) :
Organization : Department of Oral Microbiology, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 32
Number : 3/4
Page : 227-240
Year/Month : 1997 / 12
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : [Abstract] Nineteen strains of Porphyromonas gingivalis, including ATCC 33277, 381, SU 63, W 50 and W 83, were tested for their ability to coaggregate with 16 strains of oral bacteria representing Fusobacterium, Capnocytophaga, Selenomonas, Actinomyces, Streptococcus, Lactobacillus, and Propionibacterium. P.gingivalis strains with the exception of W 50 coaggregated with F.nucleatum, F.necrophorum, A.viscosus, A.naeslundii, S.salivarius, S.sanguis, S.mitior, and S.mutans. Of the 19 strains of P.gingivalis examined, 16 strains apparently coaggregated with Actinomyces and Streptococcus sanguis (coaggregation score : 2). However, coaggregation of P.gingivalis BH 18/10, RB 24 M-2, JBB-C, Eso-105 and Eso-192 with S.salivarius, S.mitior and S.mutans was not essential. Coaggregation of P.gingivalis ATCC 33277 with Fusobacterium was inhibited by 0.1 mM EDTA, whereas that with Gram-positive partner strains was usually not inhibited. This finding indicated that coaggregation property of P.gingivalis ATCC 33277 with Fusobacterium was Ca2+ or Mg2+ dependent. Lactose-inhibitable coaggregation was only observed between P.gingivalis ATCC 33277 and F.necrophorum GAI 0467. Heat treatment of Fusobacterium did not affect coaggregation with P.gingivalis ATCC 33277, suggesting that heat-stable lactose-containing receptor on F.necrophorum GAI 0467 recognized the corresponding structure on P.gingivalis. Heat treatment of P.gingivalis ATCC 33277 reduced adherences to Gram-positive partners, whereas the coaggregation receptor of Actinomyces was heat-stable. Pretreatment of A.viscosus and Streptococcus with trypsin or proteinase K reduced subsequent adherence to P.gingivalis ATCC 33277. L-Arginine and L-lysine both blocked coaggregation of P.gingivalis ATCC 33277 with most oral partners with the exception of S.sanguis. Furthermore, Nα-p-tosyl-l-lysine chloromethyl ketone (TLCK) caused 70-75% inhibition of coaggregation with A.viscosus, S.mitior or S.mutans, suggesting that trypsin-like enzyme of P.gingivalis participates in its coaggregation with these oral bacteria. The adherence ability of P.gingivalis to oral bacteria may be an important factor in colonization and its function as pathogen in the periodontal pocket.
Practice : Dentistry
Keywords : Porphyromonas gingivalis