アブストラクト(46巻2号:神奈川歯学)

神奈川歯学

Japanese

Title : キトサンナノ繊維の細胞培養基材によるラット骨髄由来細胞の増殖と分化について
Subtitle : 原著
Authors : 市田佳子, 今村えり*, 根岸秀幸*
Authors(kana) :
Organization : 神奈川歯科大学付属横浜研修センター・横浜クリニック総合歯科学講座, *神奈川歯科大学自然科学講座歯科生体工学分野
Journal : 神奈川歯学
Volume : 46
Number : 2
Page : 150-158
Year/Month : 2011 / 12
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 【緒言】 組織再生には, 足場, 細胞, 増殖因子の3要素が必要である. 歯周組織再生では, 足場として膜を使用した歯周組織再生療法(GTR法)1), 骨誘導再生法(GBR法)2), エナメル基質由来タンパク(EMD)3), また増殖因子では多血小板血漿(PRP)4)が臨床応用されている. また現在では足場に増殖因子である骨形成タンパク(BMP)5), 塩基性線維芽細胞増殖因子(b-FGF)6), 形成転換増殖因子(TGF-β)7)などを添加することで生体へ応用することが研究されている. 足場として, 生体吸収性の合成高分子や天然高分子が使用されている. 天然高分子にはコラーゲンなどのタンパク質と, キチンやキトサンなどの多糖類である. タンパク質を足場として用いるには, 感染や抗原性への配慮が必要であるが, 多糖類は抗原性が極めて少ないため足場として優れている. キトサンはエビ, カニなど甲殻類の甲殻や昆虫外皮に存在するキチンから脱アセチル化で得られる多糖類である.
Practice : 歯科学
Keywords : キトサン, ラット骨髄由来細胞, 細胞の増殖・分化, ノジュール形成

English

Title : Growth and Differentiation of Rat Bone Marrow Cells Cultured on Chitosan Nanofiber Matrices
Subtitle :
Authors : Yoshiko ICHIDA, Eri IMAMURA*, Hideyuki NEGISHI*
Authors(kana) :
Organization : Department of Comprehensive Dentistry, Yokohama Clinical Education Center of Kanagawa Dental College, *Department of Natural Science, Division of Dental Bioengineering, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 46
Number : 2
Page : 150-158
Year/Month : 2011 / 12
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : [Abstract] Chitosan has been studied as applied the biomaterial. This study investigated the effect of proliferation and osteoblastic differentiation of rat bone marrow cells (RBMCs) on the chitosan nanofiber coated ware (Chitosan plate). This study used RBMCs that were obtained from the femora of 7-week-old male rats. RBMCs were inoculated on the Chitosan plate and the hydrophilic well after coated with the enamel matrix derivative (EMD) or human periodontal ligament fibroblast-conditioned medium (HPLF-CM). RBMCs were cultured in α-MEM (cont.m) that included the 10%FCS and 0.25mMAsA・2P and in differentiation medium (diff.m) which composed of α-MEM supplemented with 10nMDex and 10mMβ-GP for 7 days. On the other chitosan plate and the hydrophilic well, the confluent RBMCs were co-cultured with insert HPLF were cultured in diff.m and α-MEM. They were examined for the rates of cell growth, alkaline phosphatase (ALPase) activity, von Kossa stain and levels of mRNA for osteonectin (ON), collagen type I (COL-I), ALPase, osteocalcin (OCN). Chitosan plate indicated a great amount of DNA and ALPase activity than the hydrophilic well. The amount of DNA and ALPase activity increased to culture in differentiation medium. RBMCs which were co-cultured with insert HPLF were inhibited the amount of DNA and ALPase activity. von-Kossa positive signals were detected with diff.m but not stained cont.m. RBMCs were cultured in cont.m indicated the expression ON and COL-ImRNA, and in diff.m indicated the expression OCN mRNA. RBMCs were co-cultured with insert HPLF in diff.m indicated the expressions of ON and COL-ImRNA level than OCN mRNA level. These results indicated that chitosan plate was effective against proliferation and osteoblastic differentiation of RBMCs.
Practice : Dentistry
Keywords :