アブストラクト(23巻4号:神奈川歯学)

神奈川歯学

Japanese

Title : 根尖病変成立におけるマクロファージの役割に関する研究 - 感染根管分離細菌の刺激に対するマクロファージの反応 -
Subtitle : 原著
Authors : 冨永尚宏1),2), 長田保1), 梅本俊夫2)
Authors(kana) :
Organization : 1)神奈川歯科大学歯科保存学教室第三講座, 2)神奈川歯科大学口腔細菌学教室
Journal : 神奈川歯学
Volume : 23
Number : 4
Page : 568-586
Year/Month : 1989 / 3
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「緒言」根尖病変は感染根管内の細菌あるいは根管内死腔に貯留した組織液や壊死した歯髄の変性物など種々の因子の刺激が原因となって形成されると言われている. なかでも根管内細菌は, 菌体成分や産生物による直接的作用あるいはリンパ球を介した免疫応答やマクロファージの産生する可溶性因子による間接的作用が根尖歯周組織を刺激し, 歯根膜の破壊や歯槽骨の吸収において極めて重要な役割を果たしていると考えられており, 根管内を無菌化することが感染根管治療の基本的概念となっている. 近年, 嫌気性菌の分離, 培養技術の向上とともに多くの研究者によって感染根管から多数の偏性嫌気性菌が分離同定されるようになった. 根尖病変を有する根管から分離される細菌は偏性嫌気性菌が主体であり, これらの細菌と臨床症状との関連性についても明らかにされてきている. 著者も, これまでX線学的に根尖病変を有する根管充填歯から多数の偏性嫌気性菌を分離同定し, Bacteroides, Peptostreptococcus, Veillonella, Eubacterium属が高頻度に分離されることを報告している.
Practice : 歯科学
Keywords : 根管内細菌, マクロファージ, 組織細胞

English

Title : The Roles of Macrophage on the Mechanism of Development of Periapical Lesion - The Response of Macrophage Stimulated with Bacteria Isolated from Infected Root Canals -
Subtitle : Original article
Authors : Naohiro TOMINAGA1),2), Tamotsu Osada1), Toshio Umemoto2)
Authors(kana) :
Organization : 1)Department of Conservative Dentistry, Kanagawa Dental College, 2)Department of Oral Microbiogy, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 23
Number : 4
Page : 568-586
Year/Month : 1989 / 3
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : Abstract : It has been proposed that bacteria in infected root canals are most important agents to pathogenesis of the periapical lesion. The aim of the present study was to examine the roles of macrophage on the mechanism of development of periapical lesion. Therefore the influences of bacteria isolated from infected root canals to macrophage functions and the effects of products from macrophage stimulated with bacterial components to periodontal tissue were investigated. In this study, sonic extracts prepared from Bacteroides buccae predominantly isolated from root canals were tested for its capacity of induction of chemotaxis and production of prostaglandin E2 and collagenase from human peripheral monocyte. Furthermore prostaglandin E2, collagenase production and alkaline phosphatase activity of fibroblasts from humam periodontal ligament (HPLF), pulp (HPF) and gingiva (Gin 1) stimulated with macrophage conditioned medium (MCM) stimulated with B.buccae sonic extracts were examined. The results obtained were as follows. The sonic extract of B.buccae showed capacity to induce macrophage chemotaxis directly and by activation of serum complement, and the serum activated with sonic extract of B.buccae was more active than the serum activated with LPS of Salmonella typhimurium. Prostaglandin E2 production of macrophage was increased when the cells were stimulated by sonic extracts of B.buccae, but collagenase activity. toas not increased. MCM stimulated with sonic extracts of B.buccae fot 48 hours strongly induced PGE2 and collagenase production from HPLF and HPF, at the same time sonic extract showed the similar capacity of induction of the PGE2 production of MCM. But, HPF stimulated with sonic extract showed the low activity of induction of the PGE2 production. On the other hand, Gin 1 cell produced a few amount of the PGE2 when it was stimulated with MCM, but not produced collagenase. Alkaline phosphatase activity of HPLF and HPF had been inhibited by addition of MCM stimulated with B.buccae sonic extract.
Practice : Dentistry
Keywords :