ALDH1A3は肺動脈高血圧の遺伝子調節と代謝を調整する
Dan Li1,2,3, Ning-Yi Shao2,4,5, Jan-Renier Moonen1,2,3
1Vera Moulton Wall Center for Pulmonary Vascular Diseases (D.L., J-R.M., S.O., L.W., T.N., E.Y., M.R.), Stanford University School of Medicine, CA.
Circulation
|March 25, 2021
まとめ
アルデヒド脱水酵素1A3 (ALDH1A3) は,肺動脈高血圧 (PAH) の滑らかな筋肉細胞増殖のための細胞代謝と遺伝子発現を調整する. PAHの滑らかな筋肉細胞に ALDH1A3を標的とすることは,潜在的な治療戦略を提供します.
科学分野:
- 血管生物学
- 代謝の調節
- エピジェネティクス
背景:
- 滑らかな筋肉細胞 (SMC) の増殖は,肺動脈高血圧 (PAH) と全身血管疾患に寄与する.
- 糖分解の増加は,PAHにおける増殖性SMCフェノタイプの特徴である.
- 代謝の変化はクロマチンの構造と遺伝子発現に影響を与え,細胞機能に影響を与えます.
研究 の 目的:
- PAHにおける肺動脈SMC (PASMC) の増殖と糖分分解の作用におけるアルデヒド脱水素酶1家族3 (ALDH1A3) の役割を調査する.
- マウスモデルでALDH1A3が肺高血圧の発症に欠かせないかどうかを判断する.
- ALDH1A3がPAH PASMCにおける遺伝子発現と代謝を調節するメカニズムを解明する.
主な方法:
- PAH患者と対照群からのPASMCのRNAシーケンシング
- 増殖と糖分解におけるALDH1A3機能の評価
- SMCでAldh1a3が削除されたトランスジェニックマウスモデルの生成.
- 核ALDH1A3の活性とその染色体変異と遺伝子転写への下流効果の分析.
主要な成果:
- ALDH1A3はPAH PASMCで上調され,その増殖性および糖分解性特性に欠かせない.
- SMC特異的なAldh1a3の消去は,マウスにおける低酸素誘発性肺高血圧を予防した.
- 核ALDH1A3は,NFYA結合部位でKAT2B経由でH3K27のアセチル化を促進し,細胞サイクルと代謝遺伝子の転写を促進する.
- PAH PASMCにおけるBMPR2喪失はALDH1A3を上調し,その転写はβ-カテニンに依存した.
結論:
- ALDH1A3を含む代謝-転写軸は,PAHにおけるSMC増殖のための表遺伝子および転写の調節とエネルギー需要を調整する.
- ALDH1A3をPAH SMCに特異的に標的にすることは,内皮細胞を節約する有望な治療法です.
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