ZFP36L2は,早期爆裂形成ユニットの赤色素原始体の自己更新のために必要です
Lingbo Zhang1, Lina Prak, Violeta Rayon-Estrada
1Whitehead Institute for Biomedical Research and Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02142, USA.
Nature
|June 11, 2013
まとめ
RNA結合タンパク質ZFP36L2は赤血球の生成に不可欠である. それは分子スイッチとして作用し,初期の祖先 (BFU-E) の自己更新を維持し,エリソイド細胞の増殖を可能にします.
科学分野:
- ヘマトポエーシス (血液形成) とは
- 分子生物学は分子生物学である.
- セルラーレギュレーション セルラーレギュレーション
背景:
- 様々な系統の幹細胞と祖先細胞は,自己再生によって分裂し,未知のタンパク質によって調節されるプロセスである.
- グルココルチコイドは,初期勃発型ユニット-エリトroid (BFU-E) の祖先において自己再生を促進することによって,赤血球の形成を高めます.
研究 の 目的:
- 染色体系における幹細胞の自己再生を調節するタンパク質を特定する.
- グルココルチコイド誘発のBFU-E自己更新およびエリトロポエシスにおけるZFP36L2の役割を調査する.
主な方法:
- BFU-Es.におけるグルココルチコイド受容体 (GR) の転写標的としてZFP36L2を調査した.
- 培養されたBFU-E細胞と移植された赤血球原細胞でZFP36L2のノックダウン実験を行った.
- エリソイド分化中にメッセンジャーRNA (mRNA) にZFP36L2の結合を分析した.
主要な成果:
- ZFP36L2はGRの転写標的であり,BFU-Eの自己更新に不可欠である.
- グルココルチコイドアゴニストは,ZFP36L2発現を維持し,通常は赤色球分化中にダウンレギュレーションされます.
- ZFP36L2のノックダウンは,グルココルチコイド誘発のBFU-Eの自己更新を妨害し,体内で赤色素原体の拡大を防ぐ.
- ZFP36L2は,末端赤血球分化時に上調されるmRNAに結合し,その発現を否定的に調節する.
結論:
- ZFP36L2は分子スイッチとして機能し,BFU-Eの自己更新を促進します.
- この自己再生は,コロニーを形成するユニット・エリソイド (CFU-E) の先駆体および全体的なエリソイド細胞生成の増加につながります.
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