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ビトロ成熟ヒト多能幹細胞由来心臓筋細胞は,損傷した心臓の構造と機能を強化した移植細胞を形成する
Wahiba Dhahri1, Tamilla Sadikov Valdman1, Dan Wilkinson2
1McEwen Stem Cell Institute (W.D., T.S.V., E.C., N.A., B.Q., H.M., F.W., E.Q., W.J., S.F., A.M., M.J.G.-G., G.K., M.A.L.), University Health Network, Toronto, ON, Canada.
Circulation
|January 28, 2022
まとめ
ポリデミチルシロキサン (PDMS) 付属のロールボトルを用いた成熟したヒト多能幹細胞由来心筋細胞 (hPSC-CM) の大規模製造は,心臓再生の成果を改善する. これらの成熟したhPSC- CMを移植すると,心筋梗塞後の構造的および機能的回復が促進されます.
科学分野:
- 心血管研究
- 幹細胞生物学
- 再生医療
背景:
- ヒトの多能幹細胞由来心筋細胞 (hPSC-CMs) は心臓修復の有望性を示しているが,未成熟性によって制限されている.
- 翻訳用には成熟したhPSC-CMの大規模生産が必要です.
研究 の 目的:
- ポリメチルシロキサン (PDMS) 裏付のロールボトルを使用して成熟したhPSC-CMのスケーラブルな製造を開発する.
- 成熟したhPSC-CMの治療可能性を,未成熟のhPSC-CMと比較して,心筋梗塞モデルで評価する.
主な方法:
- PDMSで成熟したhPSC-CMのフェノタイプ化と,トランスクリプトミクス,イメージング,および電気生理学を用いた組織培養プラスチック.
- hPSC-CMをギニア豚の心臓発作モデルに移植する.
- ヒストロジー,光学マッピング,エコーカルディオグラフィー,および電動カルディオグラフィーを使用して,移植構造,機能,および統合の評価.
主要な成果:
- PDMS付のロールボトルあたり1x10^8以上の成熟したhPSC-CMのスケーラブルな生成.
- PDMSで成熟したhPSC- CMは心臓の遺伝子発現と in vitroの成熟を強めた.
- 移植されたPDMSで成熟したhPSC- CMは,移植構造の改善,電気機械的統合,鼓動不良の減少,そしてよりよい機能的回復を示した.
結論:
- 成熟したhPSC-CMをスケールで生成するための実用的な方法が確立された.
- より成熟したhPSC-CMを移植すると,より優れたin vivo結果が得られます.
- このアプローチは,hPSC-CMの心臓再生の可能性を高めています.
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