ETSDNA結合ドメインとの遺伝子融合は,ヒト腫瘍における染色体転位によって引き起こされる
O Delattre1, J Zucman, B Plougastel
1Laboratoires de Génétique des Tumeurs and URA 620 CNRS, Institut Curie, Paris, France.
Nature
|September 10, 1992
まとめ
ユーイング肉腫は,特定の染色体転位,t(11;22) を含む. この遺伝的変化は,DNA結合ドメインをRNA結合ドメインに置き換えることで,染色体22の鍵となる遺伝子を変えて,ハイブリッド遺伝子を生み出します.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- 腫瘍学 腫瘍学
背景:
- ユーイングの肉腫と原始的な神経赤皮性腫瘍は,特定の染色体転位を共有しています.
- 転位ブレイクポイントのクローニングにより,EWSR1とEWSR2のゲノム領域が特定されました.
- 保存された断片は,潜在的なハイブリッドトランスクリプトを示唆した.
研究 の 目的:
- トランスロケーションによって生じる遺伝的変異を調査する.
- 転位によって影響を受ける特定の遺伝子を特定するために.
- 変異遺伝子の機能的影響を特徴づけるために.
主な方法:
- 保存された制限断片を使用して,人間の補完的なDNAライブラリのスクリーニング.
- 遺伝子発現の分析とオープン・リーディング・フレーム.
- 野生型と転位遺伝子配列の比較.
主要な成果:
- t(11;22) 転位は,染色体22の発現遺伝子の開いた読み取り枠を変更する.
- 推定RNA結合ドメインをコードする配列は,DNA結合ドメインを置き換えます.
- これは,ネズミのFli-1のヒト同類であるヒトを対象としています.
結論:
- ユーイング肉腫における特定の染色体の転位は,新しい遺伝子融合につながります.
- この融合により,機能ドメインが変化したタンパク質が生まれ,遺伝子の調節に影響を与える可能性があります.
- この分子メカニズムを理解することは,ユーイングの肉腫研究にとって極めて重要です.
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