アブストラクト(27巻4号:神奈川歯学)

神奈川歯学

Japanese

Title : コラーゲン・ゲル内培養におけるヒト歯根膜由来線維芽細胞の増殖及び分化調節について
Subtitle : 原著
Authors : 川村太助, 斎藤滋
Authors(kana) :
Organization : 神奈川歯科大学口腔生化学教室
Journal : 神奈川歯学
Volume : 27
Number : 4
Page : 447-464
Year/Month : 1993 / 3
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「緒言」歯周組織は常時間歇的咬合力を受け, その生理的機能を遂行する組織である. 特に, 歯周組織の1つである歯根膜は, セメント質と歯槽骨という石灰化組織に囲まれた非石灰化組織である. つまり, 歯根膜は発生学的にセメント質, 歯槽骨と同様, 歯小嚢由来であるにも関わらず, 石灰化能力が抑制された分化機能をもつ組織と考えられる. 近年, Saito, S.et al., Kawase, T.et al.と川瀬らにより, 歯根膜由来の線維芽細胞(Human Periodontal Ligament Fibroblast : HPLF)の培養系が確立された. その結果, HPLFには, アルカリフォスファターゼ(ALPase)活性が存在することから, 歯肉及び皮膚由来の線維芽細胞との特徴が異なることが明らかとなり, Saito, S.et al., Kawase, T.et al.と川瀬らにより, osteoblastic fibroblastと提唱された. 更に, Kawase, T.et al.は, HPLFにbone / liver / kidney-type ALPaseが存在し, しかも, Ca2+調節ホルモンである活性型ビタミンD3の1, 25(OH)2D3によってALPase活性が上昇することを報告した.
Practice : 歯科学
Keywords : ヒト歯根膜線維芽細胞(HPLF), コラーゲン・ゲル内培養, ゲル収縮, ALPase

English

Title : Regulation of the Proliferation and Diflerentiation on Human Periodontal Ligament Fibroblasts within Collagen Gel Culture
Subtitle :
Authors : Taisuke KAWAMURA, Shigeru Saito
Authors(kana) :
Organization : Department of Oral Biochemistry, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 27
Number : 4
Page : 447-464
Year/Month : 1993 / 3
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : Abstract : Human periodontal ligaments are connective tissues which usually exposed to mechanical force. It is important that one understands their functions and characteristics. In this study human periodontal ligament fibroblasts(HPLF)were cultured in collagen gel. These HPLF were inoculated at a cell density of 2.5×10 4 cell/cm3 with a reconstruction buffer, a 3mg/ml collagen solution, and a five-fold concentration of D-MEM containing 2mg FBS/ml, 50μg ascorbic acid/ml, penicillin / streptomycin, in 24-petri multi wells. Cell shape in collagen gels showed long and narrow bipolar forms. Cell growth in collagen gels showed significant difference compared with monolayer cell culture, while the gel contraction produced by detaching the gel from the well caused a decrease in cell growth. Therefore, 3H-thymidine incorporation was suppressed by the gel cutting. There was also an extreme decrease in ALPase activity after gel cutting. When HPLF was cultured in collagen gel, ALPase activity released from the cells to the gel matrix. However, after supplementing 1, 25(OH)2D3 in the collagen gel culture, ALPase activity did not release from the cells. Therefore ALPase activity was maintained in the cells. A release of ALPase activity was also observed in the extracelluler matrix after ALPase staining of HPLF cultured in collagen gel with or without gel contraction. The kinetic analysis of ALPase of HPLF exposed with 1, 25(OH)2D3 and dexamethason showed an increase in it's protein synthesis. These results suggest that the suppression of cell growth and ALPase activity by gel conttraction was induced by cell-matrix interactions.
Practice : Dentistry
Keywords :