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の短線毛に関する研究
Subtitle : 原著
Authors : 崔鍾石, 浜田信城, 新井宗高, 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 : 249-259
Year/Month : 1997 / 12
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「緒言」 歯周病は, 歯肉溝に存在する歯周病原細菌によって引き起こされる歯肉および歯周結合組織の炎症性病変である. 偏性嫌気性のグラム陰性桿菌であるPorphyromonas gingivalis(P.gingivalis)は, 歯周病に係わると考えられるいくつかの病原因子を有していることから歯周炎の原因菌として最も重要視されている. P.gingivalisは, 唾液成分, 頬粘膜細胞, 赤血球, フィブロネクチン-コラーゲン複合物質および他の口腔細菌などに付着する性質を有しており, 本菌のヒト細胞への付着は, 歯周病発症の重要な第一歩であると考えられる. この付着は種々の菌体表層タンパク質によって起こるものと考えられているが, なかでも線毛は, 宿主細胞への付着に関与する因子として重要視されている. 更に, P.gingivalisの線毛は, ヒトに対して強い抗原性を示し, 歯周炎における歯周組織破壊に極めて重要な存在とされている.
Practice : 歯科学
Keywords : Porphyromonas gingivalis, 短線毛

English

Title : A Study on the Short Fimbrial Structure of Porphyromonas gingivalis
Subtitle : Original article
Authors : Jong-Suk CHOI, Nobushiro HAMADA, Munetaka ARAI, Toshio Umemoto
Authors(kana) :
Organization : Department of Oral Microbiology, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 32
Number : 3/4
Page : 249-259
Year/Month : 1997 / 12
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : [Abstract] This is the first report on identification of the short fimbriae existing on the cell surface of Porphyromonas gingivalis. Expression of fimbriae on the surface of the fimbrial gene inactivated strain (fimA mutant) and the wild-type strain of Porphyromonas gingivalis ATCC 33277 was compared using electron microscopy. The wild-type strain produced long fimbrial structures from the cell surface, whereas no such structures were observed on the fimA mutant. However, short fimbrial structures possibly representing a second type of fimbriae were seen onthe surface of the fimA mutant. The short fimbrial protein was then purified from the fimA mutant by chromatography on DEAE-Sepharose CL-6B. The molecular weight of the short fimbrial protein was 67kDa as estimated by SDS-PAGE under reducing conditions after boiling at 100℃, was distinct from the 41kDa fimbrial protein. The component showed a ladder-like pattern at 80℃ under nonreducing conditions. In immunoblotting analysis, anti-short fimbriae rabbit serum reacted with both 100℃- and 80℃-treated short fimbriae. The anti-short fimbriae serum also reacted with the crude fimbrial preparation from the wild-type strain. These results suggest that the short fimbriae appearing on the fimA mutant strain are produced together with numerous long fimbriae. Moreover, these short fimbriae are different in size and antigenicity from the earlier reported 41kDa major fimbrial component.
Practice : Dentistry
Keywords : Porphyromonas gingivalis