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PDGF経路の活性化は,LMNA変異と拡張性心筋病を関連付けています
Jaecheol Lee1,2,3,4, Vittavat Termglinchan5,6,7, Sebastian Diecke8,9,10
1Stanford Cardiovascular Institute, Stanford University, Stanford, CA, USA. jaecheol@skku.edu.
Nature
|July 19, 2019
まとめ
Lamin A/C (LMNA) 遺伝子の変異は,拡張性心筋病 (DCM) を引き起こします. 血小板由来成長因子 (PDGF) 経路をターゲットにすることで,この遺伝性心疾患を治療することができます.
科学分野:
- 心血管生物学
- 幹細胞生物学
- 遺伝学
背景:
- Lamin A/C (LMNA) 遺伝子の変異は,遺伝性拡張性心筋病 (DCM) の頻繁な原因である.
- LMNAに関連したDCMは,シストリック機能の障害と心律動乱によって特徴付けられます.
- 患者特有の誘発性多能幹細胞由来心筋細胞 (iPSC-CMs) は,疾患メカニズムを研究するためのモデルを提供します.
研究 の 目的:
- LMNAに関連するDCMの基礎となる細胞メカニズムを,患者由来のiPSC-CMを用いて調査する.
- LMNAに関連するDCMの潜在的治療標的を特定する.
主な方法:
- LMNA変異の患者からiPSC- CMを生成する.
- 単細胞レベルで心臓機能を評価する電気生理学的研究
- iPSC-CMにおける血小板由来成長因子 (PDGF) を含む信号伝達経路の分析
主要な成果:
- 変異したiPSC-CMは異常なカルシウムホメオスタシスを示し,単細胞不律を引き起こした.
- LMNA変異を有するiPSC- CMでは,血小板由来成長因子 (PDGF) 信号伝達経路が活性化されました.
- PDGF経路の阻害は,不規則な表型を in vitro で改善した.
結論:
- 異常なPDGF経路の活性化は,LMNA関連のDCMの病原化に寄与する.
- PDGF受容体-β (PDGFRB) は,LMNA関連のDCMの潜在的な治療標的である.
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