アブストラクト(35巻4号:神奈川歯学)

神奈川歯学

Japanese

Title : エナメル上皮腫におけるHGFの発現
Subtitle :
Authors : 今泉智子
Authors(kana) : いまいずみともこ
Organization : 神奈川歯科大学口腔病理学教室
Journal : 神奈川歯学
Volume : 35
Number : 4
Page : 177-189
Year/Month : 2000 / 12
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : HGF(肝細胞増殖因子:Hepatocyte Growth Factor)は, 1983年にNakamuraらによって肝再生を行っているラット血清中から肝再生因子の実体として見出され1), 1989年に増殖因子としてラット血小板から初めて単離された2). その後HGFは主として線維芽細胞により産生され, HGF-receptorであるc-Metを介した上皮細胞の増殖活性3)を高めるばかりでなく, 運動促進作用4), 形態形成能5), 腫瘍細胞の増殖促進あるいは抑制作用6)など機能的に多様な生物活性を示すことが明らかにされている. 一方口腔領域でも, HGFが歯の発育形成に関与している可能性が示されている. 1996年Tabataらは, 組織培養系におけるマウス歯胚にoligodeoxynucleotide(ODN)を添加してHGFmRNAの翻訳を阻止する実験によって歯乳頭細胞より産生されるHGFが歯原性上皮に増殖因子として作用していることを報告した7).
Practice : 歯科学
Keywords : HGF, c-Met, エナメル上皮腫

English

Title : Expression of HGF in Ameloblastoma
Subtitle :
Authors : Tomoko IMAIZUMI
Authors(kana) :
Organization : Department of Oral Pathology,Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 35
Number : 4
Page : 177-189
Year/Month : 2000 / 12
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : Hepatocyte growth factor (HGF) is a molecule that exhibits a variety of physiological activities, that induce mitogenic, motogenic and morphogenic responses in cells. It also acts as a suppressive factor on tumor cells by combining with its receptor, c-Met. Recently, the contribution of HGF to the formation and development of teeth was reported by Tabata et al. In our study, in order to reveal the role of HGF/c-Met system in the pathogenesis, mitogenesis and histological morphogenesis of ameloblastoma, one of the most commonly developed odontogenic tumors, the expression of HGF and c-Met was investigated. Expression of HGF protein and c-Met protein was observed in the tumor cells of many histological subtypes of ameloblastoma, which were histologically similar to the enamel organ, and expression of the HGF protein was also observed in a small number of fibroblast within the stroma. In situ hybridization using T-T dimerization of an oligonucleotide probe enabled the detection of HGF mRNA signal expression in a localized area almost entirely consistent with the location of HGF protein in the tumor cells of ameloblastoma. Reverse transcription-polymerase chain reaction (RT-PCR) demonstrated bands indicating the amplification of DNA fragments specific to HGF and c-Met in the same ameloblastoma tissue. From these results, the presence of HGF and c-Met expression in the ameloblastoma tissue suggests the contribution of HGF/c-Met system to the pathogenesis, mitogenesis and morphogenesis of different subtypes of ameloblastoma that resemble the enamel organ.
Practice : Dentistry
Keywords :