アブストラクト(32巻1号:神奈川歯学)

神奈川歯学

Japanese

Title : HPLFの機械的外力による細胞応答の研究 : コラーゲンゲル収縮による変化
Subtitle : 原著
Authors : 相原治美*, 金祥宇*, 松沢光洋**, 中川陽一郎*, 大沢隆*, 出口眞二***, 飯島陽****, 川瀬俊夫****, 斎藤滋*
Authors(kana) :
Organization : *神奈川歯科大学口腔生化学教室, **神奈川歯科大学小児歯科学教室, ***神奈川歯科大学歯周病学講座, ****神奈川歯科大学歯科生体工学教室
Journal : 神奈川歯学
Volume : 32
Number : 1
Page : 89-95
Year/Month : 1997 / 6
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「緒言」 歯根膜組織は, 歯と歯槽骨の間に存在している結合組織である. その生理的役割は, 歯にかかる咬合圧の緩衝等であり, 主に歯の支持組織としての性格が強い. しかしながら歯周病治療学の観点から見た場合, 歯根膜組織の臨床的意義は大きい. 何故なら歯周治療の最終目標は失われた組織の回復, 新生セメント質による新付着の獲得であり, 新生セメント質形成能を持つ細胞は歯根膜組織由来であるからである. 現在臨床で行われているGTR法はこの歯根膜由来細胞の増殖を誘導する治療であり, 理に叶った治療ではあるが, 物理的に膜を使用し, 歯肉, 上皮, 線維組織の深部増殖を防ぐというだけでは適応症に限界がある. 歯根膜由来細胞の増殖・分化を, 細胞生物学的に選択的に惹起させる手段がGTR法等, 歯周治療に加味されるならば, さらに高い治療成績も得られる筈である. そのような期待を反映して歯根膜細胞の培養を用いた検索は近年数多く報告されてきているが, 臨床応用可能なところまでの細胞特性は判明してはいない.
Practice : 歯科学
Keywords : HPLF, Collagen gel, gel contraction, ECM

English

Title : Cellular Responses by a Mechanical Stress Exposed to HPLF : Alterations by Collagen Gel Contraction
Subtitle : Original article
Authors : Harumi AIHARA*, Sang-Woo KIM*, Mitsuhiro MATSUZAWA**, Yoichiro NAKAGAWA*, Takashi OSAWA*, Shinji DEGUCHI***, Yo IIJIMA****, Toshio KAWASE****, Shigeru Saito*
Authors(kana) :
Organization : *Department of Oral Biochemistry, Kanagawa Dental College, **Department of Pediatric Dentistry, Kanagawa Dental College, ***Department of Periodontology, Kanagawa Dental College, ****Department of Dental Bioengineering, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 32
Number : 1
Page : 89-95
Year/Month : 1997 / 6
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : [Abstract] The mechanical environment may provide the physiological conditions of fibroblasts of periodontal ligament embedded in three-dimensional extracellular matrices. We have studied the human periodontal ligament-derived fibroblasts (HPLF) cultured in type I collagen gel induced a cell mediated contraction of gels. We proposed the gel contraction may be a mimic condition of dynamic biomechanical stresses such as a cell rearrangement affected by the occlusion during periodontal regeneration. The HPLF in 0.12% type I collagen supplemented with 5% growth factor in serum (GFS) and 0.2mM ascorbic acid-2-phosphate at a cell density of 2.5×105 cells/ml were cultured for 5 days. Prior to gel contraction, cells were cultured with methionine-free, and 1% GFS medium for 24 hrs. During gel contraction by cutting between gel and well, cells were labeled with 3H-thymidine (3H-TdR) or 35S-methionine (35S-met) for every 3 hrs. In order to determine a gel contraction, the diameter and weight of gels were measured. At the first 3 hrs gel contraction, the incorporation of 3H-TdR into cold TCA precipitates of cells was dramatically decreased. At this time the diameter and weight of gels reduced by 40% and 60%, respectively. After contraction of floating collagen matrices, there was a marked decline in the protein synthesis of HPLF. The results show that the gel contraction can regulate the cell proliferation and the synthesis of proteins of HPLF. Therefore, the mechanical stresses may propose the one of essential factors for the cell growth and cell differentiation.
Practice : Dentistry
Keywords : HPLF, Collagen gel, gel contraction, ECM