まとめ
マウスの皮膚細胞に突然変異したRAS腫瘍遺伝子を導入すると,乳頭腫を引き起こす可能性があります. これは,ras遺伝子が皮膚がん発生の重要な標的であり,潜在的に腫瘍形成を開始することを示唆しています.
科学分野:
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- 皮膚がん発生には複数の遺伝的イベントが関与し,ras遺伝子は早期の標的として関与しています.
- 皮膚パピロマで見つかった活性化されたc-rasH遺伝子は,突然変異の開始におけるその役割を示唆している.
- ハーヴェイ・マウリン・サーコマウイルス (Ha-MSV) v-rasH遺伝子は, in vitroでケラチノサイトの分化を変えることができます.
研究 の 目的:
- 皮膚腫瘍を誘発するHa-MSV v-rasH遺伝子の役割を調査する.
- ケラチノサイトに突然変異したラス・オンコゲンを導入すると,体内でパピローマの形成を引き起こすかどうかを判断する.
- 腫瘍組織における外因的腫瘍遺伝子の転写調節を調べる.
主な方法:
- 欠陥のあるレトロウイルスベクターを使用して,培養ケラチノサイトにHa-MSV v-rasH遺伝子を導入.
- 遺伝子組み換えケラチノサイトを用いた皮膚移植の構築.
- 腫瘍形成を評価するために,無血性裸のマウスの受容体に移植する.
- 分化腫瘍組織における腫瘍遺伝子の発現の分析.
主要な成果:
- 変異RAS腫瘍遺伝子を携えたケラチノサイトからの皮膚移植は,マウスの受容体でパピローマを生成した.
- 導入されたv-rasH腫瘍遺伝子の発現は,転写的に調節されていることが観察されました.
- 調節は,その結果生じた良性腫瘍の区分された領域で発生した.
結論:
- 変異したラス・オンコゲンは,マウスの皮膚にパピロマの形成を誘発し,皮膚がん発生の開始におけるその役割をサポートすることができます.
- 分化腫瘍組織における外因的腫瘍遺伝子の転写的調節は,腫瘍遺伝子の発現と分化との複雑な相互作用を示唆する.
- この研究は,皮膚がんの発症におけるras遺伝子の腫瘍学的可能性に関するin vivoの証拠を提供します.
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