腫瘍性遺伝子融合は,正常なヒト細胞のRNAのトランススプライシングを模倣する
Hui Li1, Jinglan Wang, Gil Mor
1Department of Pathology, Yale University School of Medicine, New Haven, CT 06520, USA.
まとめ
正常な子宮内膜細胞は,RNAのトランススプライシングによってJAZF1-JJAZ1融合タンパク質を産生し,抗アポプトシス作用を有する. この発見は,いくつかの遺伝子融合が,通常,一時的なキメリック産物を構成的に発現することによって,癌を促進する可能性があることを示唆しています.
科学分野:
- 分子生物学は分子生物学である.
- 腫瘍学 腫瘍学
- 遺伝学 遺伝学とは
背景:
- 遺伝子融合はヒトの腫瘍に多く見られ,通常は異常で,がんの成長を促す腫瘍特異的産物と見なされます.
- 支配的な仮説は,キメリックトランスクリプトとタンパク質が腫瘍細胞に成長または生存の利点を与えることを示唆している.
研究 の 目的:
- JAZF1-JJAZ1キメリックRNAとタンパク質の起源と機能を調査する.
- 通常発生するトランススプライシングイベントが,腫瘍で発見された遺伝子融合を説明できるかどうかを判断する.
主な方法:
- 正常な子宮内膜ストロマ細胞におけるRNAトランスクリプトの分析.
- キメリックRNA分子の識別.
- 抗アポプトシス活性に対するタンパク質発現分析と機能的測定法.
- 自然に発生するキメリック産物との腫瘍由来遺伝子融合の比較.
主要な成果:
- 正常な子宮内膜ストロマル細胞は,JAZF1とJJAZ1の前身メッセンジャーRNAのトランススプライシングによって形成されたキメリックRNA (JAZF1-JJAZ1) を発現する.
- このキメリックRNAは,抗アポプトシス活性を示すJAZF1-JJAZ1タンパク質に変換されます.
- 自然に存在するJAZF1-JJAZ1RNAとタンパク質は,子宮内膜筋腫瘍における遺伝子融合によって生成されるものと同一である.
結論:
- 生理学的に調節されたトランススプライシングは,抗アポプトティック活動などの機能的な意味を持つキメリック遺伝子製品を生成することができます.
- 腫瘍で見られるように,これらの通常一時的なキメリック産物の構成表現は,プロネオプラスティックメカニズムである可能性があります.
- これは,すべての腫瘍に関連した遺伝子融合が異常で異常な出来事にすぎないという見解に異議を唱える.
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