不分化胚性がん細胞で活性である変異したポリオマウイルスの増強剤は,アデノウイルス-2 E1A製品によって抑制されません
Nature
|May 15, 1986
まとめ
ポリオーマウイルス (Py) 増強剤は,シミアンウイルス40 (SV40) 増強剤とは異なり,無差別化されたF9細胞では無活性である. この研究では,F9細胞はE1Aタンパク質ではなく,Py増強剤の活性を阻害する細胞抑制剤を持っていることが明らかになりました.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝子規制 遺伝子規制
- ウイルス学 ウイルス学 ウイルス学
背景:
- 強化剤は,真核生物の遺伝子転写を刺激する重要な調節要素です.
- SV40やポリオマウイルス (Py) のようなウイルス増強剤は,細胞タイプに差異的な活性を示し,Py増強剤は分化されていない胚性がん (EC) 細胞では無活性である.
- SV40増強剤は,未微分化および微分化EC細胞の両方で活性であり,異なる転写因子相互作用を示唆しています.
研究 の 目的:
- Py強化剤の細胞特異的活性に起因するメカニズムを調査する.
- アデノウイルス-2E1Aタンパク質または内生的な細胞抑制剤が,非差別化されたF9細胞におけるPy増強剤の不活性性を説明するかどうかを判断する.
主な方法:
- 無差別化されたF9細胞で活性であることが知られているPy増強剤 (Py ECF9.1) の点変異体を使用した.
- F9細胞における野生型および変異型Py増強剤の活性に対するE1A製品の効果を評価した.
主要な成果:
- アデノウイルス-2からのE1A製品は,非差別化されたF9細胞におけるPy ECF9.1変異増強剤の活動を抑制しませんでした.
- Py ECF9.1変異増強剤は,未差別化されたF9細胞で活性化し続け,野生型のPy増強剤と同じ抑制剤の標的ではないことを示しています.
結論:
- 無差別化されたF9細胞におけるPy増強剤の不活性性は,E1Aタンパク質ではなく,細胞抑制剤に起因する.
- この細胞抑制剤は,おそらくE1Aタンパク質と同じ標的配列を共有しており,保存された規制メカニズムを示唆しています.
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