アブストラクト(22巻2号:神奈川歯学)

神奈川歯学

Japanese

Title : 生体材料の生化学的研究- ヒト歯根膜細胞の特性について -
Subtitle : 原著
Authors : 中島正人, 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 : 22
Number : 2
Page : 340-354
Year/Month : 1987 / 9
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「緒言」近年, 歯科臨床における歯科インプラント治療法が積極的に導入され, 有効な治療として大きな成果を挙げている. しかし, 現在臨床に応用されている生体材料について中村と川原および木村は, Bioinertなセラミックスとしてアルミナ・セラミックス, 酸化チタンおよび酸化ジルコンがあり, 一方, Bioactiveなセラミックスとしてハイドロキシアパタイト・セラミックスおよびバイオグラス, さらに崩壊性セラミックスと3つに分類している. さらに, 木村は人工歯根材料の生物活性の定量的評価として歯周組織の細胞構成からhuman embryonic fibroblasts(WI-38)およびrat calvarial osteoblastsを用い, アルミナ・セラミックスおよびハイドロキシアパタイト・セラミックスにおける細胞の初期接着と細胞の伸展に特徴のあることを報告している. しかし, 歯根周囲を構成する細胞は主として線維芽細胞あるいは骨芽細胞から成っており, 一方, 歯頸部組織において口腔内部との境界に上皮細胞の接着が考えられる.
Practice : 歯科学
Keywords : ヒト歯根膜線維芽細胞, アルカリフォスファターゼ, 生体材料

English

Title : Biochemical Study of Biomaterials - Characterization of Human Periodontal Ligament Fibroblast-like Cells -
Subtitle :
Authors : Masato NAKAJIMA, Shigeru Saito
Authors(kana) :
Organization : Department of Oral Biochemistry, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 22
Number : 2
Page : 340-354
Year/Month : 1987 / 9
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : [Abstract]: Cultures of human periodontal ligament fibroblast (HPLF) and human alveolar bone cell (HABC) were established, maintained and characterized with respect to alkaline phosphatase (ALPase) activity which is a marker enzyme of bone cells. The effects of biomaterials to the cell growth and ALPase of cells were observed respectively. Premolars extracted for orthodontic reasons were obtained fresh. Small amount of HPL were removed from the middle one-third of the root and placed between the bottom of a 2cm2 well and a 15mm thermanox coverslip in D-MEM containing 2mg FCSP/ml, 50μg ascorbic acid/ml and penicillin/streptomycin. HPLF is grown out of this explant for 7-10 days, and then subcultured after trypsinization. The Gin-1, HPLF and HABC were inoculated at 2×104 cells/cm2 and cultured for 4 days on the plates of bioinert and bioactive materials using titanium, hydroxyapatite, A1, MAS-SiC, CPS, CPS-SiC, CPSN and CPSN-SiC. HPLF has a high ALPase activity of approximately 17nmole p-NP produced/min/1×105 cells which is similar to that of the freshly isolated rat calvarial osteoblast-like cells (23nmole/min/1×105 cells). The Km of the enzyme at pH 10.15 was 0.43mM which remained unchanged at least several passages. Although the cell growth of Gin-1, HPLF and HABC were stimulated on the HA plate, ALPase activity of HPLF and HABC were remarkedly decreased. However, Al and MAS-SiC, which are bioinert materials, increased the ALPase activity of HPLF and HABC. Therefore, HPLF could be termed osteoblastic fibroblasts. Biomaterials can regulate the ALPase activity in vitro.
Practice : Dentistry
Keywords :