ラス腫瘍遺伝子は,NIH 3T3細胞の電離放射線に対する固有の抵抗性を高めます
1Department of Radiation Oncology, University of Michigan Medical School, Ann Arbor 48109.
Science (New York, N.Y.)
|February 5, 1988
まとめ
ラス・オンコゲンは,哺乳類の細胞の電離放射線に対する耐性を著しく高めます. この放射線抵抗性の増加は,単に細胞の変容ではなく,特定のラスの遺伝子変異の直接的な結果である.
科学分野:
- 分子生物学は分子生物学である.
- 放射生物学の放射生物学について
- 腫瘍学 腫瘍学
背景:
- 放射線損傷修復の細胞メカニズムを理解することは極めて重要です.
- 哺乳類の細胞は,電離放射線に対処する固有のメカニズムを持っています.
- 腫瘍遺伝子は,ストレス反応を含む細胞プロセスに役割を果たします.
研究 の 目的:
- 細胞放射線耐性におけるras腫瘍遺伝子の役割を調査する.
- ras遺伝子変異が放射線抵抗に特異的に影響するかどうかを判断する.
- 変形した細胞における放射線生存の強化の分子基礎を解明する.
主な方法:
- NIH 3T3細胞の活性化されたRAS腫瘍遺伝子による変異.
- 放射生物学的測定を用いた内在的放射線抵抗 (D0) の測定.
- ラス突然変異の効果と変異の効果を区別するために,リバータント細胞系を分析する.
主要な成果:
- 活性化されたras腫瘍遺伝子の変換により,NIH 3T3細胞の固有放射線抵抗 (D0) が著しく増加しました.
- この強化された放射線抵抗は,ras遺伝子の変異に直接関係していた.
- 機能的なras遺伝子を保持しているが,変換が欠けているリバータント細胞も,D0.0の増加を示した.
結論:
- 特定のras遺伝子変異は,細胞の放射線抵抗を大幅に増加させます.
- ラス・オンコゲンは,電離放射線に対する細胞応答の重要な調節体である.
- ras経路をターゲットにすることで,治療的な文脈で放射線感受性を修正するための戦略を提供することができます.
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