単一の腫瘍性増強剤の再配置は,白血病の同時進行中のEVI1およびGATA2の緩和を引き起こします
Stefan Gröschel1, Mathijs A Sanders2, Remco Hoogenboezem2
1Department of Hematology, Erasmus University Medical Center, Rotterdam, 3015 GE, the Netherlands; Department of Internal Medicine III, Ulm University Hospital, 89081 Ulm, Germany.
Cell
|April 8, 2014
まとめ
AMLにおける染色体の再編成は,制御要素の位置変更により,EVI1遺伝子を活性化させ,癌につながる可能性があります. この増強剤を切除すると,がん細胞の成長が止まり,潜在的な治療標的となる.
科学分野:
- 遺伝学 遺伝学とは
- 分子生物学は分子生物学である.
- がん研究 がん研究
背景:
- 染色体の再編成,特に遺伝子融合のない染色体は,白血病発生に関与しています.
- 幹細胞レギュレータEVI1の異常発現は,急性骨髄性白血病 (AML) の特徴であり, inv(3)/t(3;3) で表れている.
研究 の 目的:
- 3qの再編成がAMLにおける異常なEVI1発現につながるメカニズムを調査する.
- 遺伝子の緩和と白血病発生におけるエンハンサー再定位の役割を調査する.
主な方法:
- 機能的ゲノミクスとゲノム工学の技術が採用されました.
- エクトピックエンハンサーのゲノム切除は,AML細胞で行われました.
- 薬理学的なBET阻害は,増強剤切除の効果を複製するために使用されました.
主要な成果:
- inv(3) とt(3;3) の2つの再編成は,遠端のGATA2増強剤の位置を変更し,外位的にEVI1.1を活性化することが示されました.
- これらの再編成は,GATA2の機能的なハプロインサフィフィエンスも引き起こした.
- エクトピックエンハンサーのゲノム切除により,EVI1が静止され,AML細胞の成長が抑制され,分化されました.
- 薬理学的なBET阻害は,エンハンサー切除の効果を模倣した.
結論:
- 単一のエンハンスターの染色体再定位は,EVI1とGATA2という2つの遠隔遺伝子を制御し,白血病発生を誘導します.
- 子宮外増強剤または関連する経路 (例えば,BET抑制) をターゲットにすることは,3q再編成でAMLの治療の可能性を示しています.
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