アブストラクト(33巻2号:神奈川歯学)

神奈川歯学

Japanese

Title : ヒト歯根膜由来線維芽細胞(HPLF)のオステオネクチン産生に及ぼす機械的外力の影響
Subtitle : 原著
Authors : 中川陽一郎, 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 : 33
Number : 2
Page : 73-81
Year/Month : 1998 / 6
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「緒言」 歯周疾患によって失われた歯周組織の改善には, 健康時と類似した新生セメント質を伴う結合組織性の新付着を獲得することが重要である. しかし実際に, 結合組織性の新付着を得ることは困難であり, 治療後の歯肉付着部は上皮性付着が大部分を占める. Melcherは手術後の付着の形態は根面に接して増殖する細胞の種類によって, 最終的な付着形態が左右されると考え, その後多くの研究者が再生問題について取り組み, Nymanらはセメント質を形成する細胞は歯根膜由来細胞であることを報告している. すなわち, 歯根膜由来細胞中にセメント芽細胞が存在し, その歯根膜由来細胞の増殖によってセメント質が形成され, 結合組織性の新付着が形成されると考えられている. 近年, Guided Tissue Regeneration Technique (GTR法)が目的に適う方法として応用されている. しかし, 歯根膜組織を介し, 新生セメント質形成を伴う結合組織性の新付着を確実に獲得する方法は未だ確立されていない.
Practice : 歯科学
Keywords : HPLF, Mechanical Stress, Osteonectin (SPARC/BM-40)

English

Title : Effect of Mechanical Stress on the Synthesis of Osteonectin (SPARC/BM-40) by Human Periodontal Ligament Fibroblast (HPLF)
Subtitle :
Authors : Yoichiro NAKAGAWA, Shigeru Saito
Authors(kana) :
Organization : Department of Oral Biochemistry, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 33
Number : 2
Page : 73-81
Year/Month : 1998 / 6
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : [Abstract] Periodontal ligament lies between tooth and alveolar bone and plays a role in mitigating the mechanical stress such as occlusion and mastication ; the mechanical stress may affect the periodontal cell metabolism. The objective of the present study is to determine the effects afforded by different magnitude of mechanical stresses on synthesis and gene expression of osteonectin (ON) in human periodontal ligament fibroblast (HPLF). HPLFs were cultured on Flex I, type I collagen-coated flexible-bottomed culture plates equipped with Flexercell strain unit. HPLFs were flexed at 3 cycles/min (10 sec strain, 10 sec relaxation) at three different magnitudes of mechanical stress (i.e., 7, 18 and 24% increase in surface area) for 1, 3 and 5 days. Synthesis of ON subjected to the mechanical stress, as determined by Western blotting analysis, was increased by 18%-mechanical stress for 1 day ; there was no significantly different between 7%- and 24%-mechanical stress. The ON synthesis was decreased, in a duration-dependent fashion, at least when ON synthesis was examined at 1, 3 and 5 days intervals. Gene expression of ON mRNA in HPLF was not influenced with or without 18%-mechanical stress even during experimental time-course tested. Hence the translation level of synthesis of ON in HPLF might be affected by mild (possibly reasonable) mechanical stress. The results obtained in the present study are consistent with the view that ON may be involved in periodontal cell metabolism in response to mechanical stress.
Practice : Dentistry
Keywords : HPLF, Mechanical Stress, Osteonectin, (SPARC/BM-40)