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CRISPR-Mediated Reorganization of Chromatin Loop Structure
Published on: September 14, 2018
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強制的なクロマチンのループリングによって,発達的に静止されたグロービン遺伝子の再活性化
Wulan Deng1, Jeremy W Rupon2, Ivan Krivega3
1Division of Hematology, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA; Transcription Imaging Consortium, Janelia Farm Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147, USA.
Cell
|August 16, 2014
まとめ
強制クロマチンのループは,静止された胚性グロービンの遺伝子を活性化させ,成体細胞における胎児のグロービンの産生を促すことができる. これは,グロービン遺伝子転写を制御するための新しい治療戦略を示しています.
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
- 発達生物学 発達生物学とは
背景:
- ディスタルエンハンスターは,クロマチンのループを通して遺伝子転写を調節する.
- 位置制御領域 (LCR) は,発達の過程で赤色素細胞のβ型グロービン遺伝子と相互作用する.
- 以前の研究で,人工の亜鉛指を使ってLCRプロモーターループの誘導が実証されました.
研究 の 目的:
- 強制クロマチンのループが静止されたグロービン遺伝子を再活性化できるかどうかを調査する.
- LCRプロモーター相互作用を治療目的で操作する可能性を調査する.
主な方法:
- Ldb1自己結合ドメイン (SA) を標的にして,ネズミの赤血球細胞における静止された胚性グロービンプロモーターを標的にする.
- SAをヒトの赤血球細胞における胎児の γ-グロービンプロモーターに標的とする.
- グロービン遺伝子転写とLCRプロモーターの接触を評価する.
主要な成果:
- ターゲティングSAは,LCRに依存する成人のネズミの赤血球細胞で,静止された胚性グロービン遺伝子を再活性化させた.
- ヒトの赤血球細胞では,SAをγ-グロービンプロモーターに標的化することで,γ-グロービン-LCRの接触が増加した.
- その結果,γ-グロービンは総β-グロービン合成の約85%を占め,成人のβ-グロービンの発現を減少させました.
結論:
- 強制的なクロマチンのループは,発達的な遺伝子サイレンシングプログラムを克服することができます.
- LCRプロモーターの相互作用をターゲットにすることで,グロービンの遺伝子発現を調節するための新しい戦略が提供されます.
- このアプローチは,ヘモグロビノパシーにおける治療的応用の可能性を秘めています.
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