FTO依存性N6メチラデノシンは,再構成および修復中の心臓機能を調節する
Prabhu Mathiyalagan1, Marta Adamiak1, Joshua Mayourian1
1Cardiovascular Research Center, Icahn School of Medicine, Mount Sinai, NY.
Circulation
|July 13, 2018
まとめ
脂肪と肥満に関連したタンパク質 (FTO) は心臓の機能に不可欠です. FTOレベルが低いとRNAメチル化が増加し,心臓の収縮性が低下しますが,FTOの回復は心臓発作後の機能を改善し,損傷を軽減します.
科学分野:
- 心血管生物学
- エピジェネティクス
- RNA 生物学
背景:
- N6-メチラデノシン (m6A) は細胞プロセスに不可欠ですが,心臓におけるその役割は十分に研究されていません.
- FTOタンパク質であるm6Aデメチラーゼは,心臓の健康と疾患におけるその機能について調査されています.
研究 の 目的:
- 心臓の収縮機能におけるFTOとm6Aの役割を明らかにする.
- 心臓ホメオスタシス,再構成,再生に対するFTOの影響の仕組みを理解する.
主な方法:
- 主要な心筋細胞培養と共にヒトのサンプル,豚,マウスのモデルを使用した.
- FTO発現を調節するために,ウイルスベクターと小さな干渉RNAを使用した.
- m6A RNA 免疫降水配列と qPCR を実行し,m6A 変異をマッピングし,検証した.
主要な成果:
- 心不全と低酸素心筋細胞のFTO発現が低下すると,m6Aが上昇し,収縮性が低下する.
- 心不全のマウスのFTOの回復により,m6Aの上昇と心臓機能の改善が認められた.
- FTOの脱メチル化活動は,心臓の転写を分解から保護し,タンパク質発現を高め,線維症を軽減し,心筋梗塞のモデルで血管新生を改善します.
結論:
- FTOに依存する心臓のm6Aメチロームは,心不全における心臓収縮に機能的に重要である.
- この研究は,心臓病におけるFTOの治療の可能性について,新しいメカニズム的な洞察を提供します.
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