再生強化要素による組織修復の調節
Junsu Kang1, Jianxin Hu2, Ravi Karra3
1Department of Cell Biology, Duke University Medical Center, Durham, North Carolina 27710, USA.
Nature
|April 7, 2016
まとめ
研究者は新しいDNA要素を発見し 組織再生強化要素 (TREEs) と呼ばれ 損傷部位での遺伝子発現を活性化させました これらのTREEは 脊椎動物の臓器の再生能力を制御するように設計できます
科学分野:
- 分子生物学
- 発達生物学
- 再生医療
背景:
- 損傷後の組織再生を誘発する 分子メカニズムを理解することは 再生医療の進歩に不可欠です
- 限られた研究は,再生過程で遺伝子発現プログラムを開始する特定の規制要素に焦点を当てています.
研究 の 目的:
- 再生組織で活性化された増強剤の制御要素の存在と機能を調査する.
- 傷に対する反応として遺伝子発現を制御する新しい遺伝的要素を特定する.
主な方法:
- 再生組織 (ゼブラ魚の心臓と) で高度に誘発された遺伝子を特定するためのトランスクリプトミックの分析.
- 再生中のクロマチンの開いたマークを持つ規制DNA要素を識別するための表遺伝子プロファイリング.
- ゼブラフィッシュと新生児マウスモデルでの強化エフェクタートランスゲンを用いた機能分析.
主要な成果:
- レプチンbはゼブラフィッシュの再生組織に高度に誘発されていることが判明しました.
- 組織再生増強剤 (TREE) として特定されたディスタルDNA配列要素は,再生中にクロマチンの開いたマークを獲得し,傷害に依存する遺伝子発現を誘導することが判明した.
- これらのTREEsはゼブラフィッシュと新生マウスの組織の両方で機能し,組織特異的な活動のためにモジュール化することが示されました.
- TREEsを用いた エンジニアリング・エンハンサー・エフェクター・トランスゲンは,ゼブラフィッシュにおける再生の有効性を調節した.
結論:
- この研究は,損傷部位での遺伝子発現を誘発する重要な役割を果たす組織再生増強剤 (TREEs) の存在を証明しています.
- TREEは脊椎動物の臓器の再生能力を調整し,組織修復のための新しい治療戦略を提供することができます.
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