多能幹細胞から培った人間の心臓組織の高度な成熟
Kacey Ronaldson-Bouchard1, Stephen P Ma1, Keith Yeager1
1Laboratory for Stem Cells and Tissue Engineering, Department of Biomedical Engineering, Columbia University, New York, NY, USA.
Nature
|April 6, 2018
まとめ
人間の誘発性多能幹細胞由来心臓組織は,身体的条件付けによって急速に成熟し,患者特有の疾患モデリングを可能にします. これらの人工心臓組織は 成人のような特性を発揮し 心臓の発達や疾患を研究します
科学分野:
- 心血管生物学
- 幹細胞生物学
- 生物医学工学
背景:
- 人間の誘発性多能幹細胞 (iPSC) は,疾患モデリングのために患者特有の心臓組織を生成します.
- 現在のiPSC由来の心臓モデルは,細胞の不成熟によって制限され,予測能力が低下しています.
- 正確な生理学および疾患研究のために成熟した心臓組織の開発は不可欠です.
研究 の 目的:
- iPSC由来の心臓組織における不成熟の限界を克服する.
- iPSC由来心筋細胞の急速な成熟のための方法を確立する.
- 患者特有の心臓の生理学と疾患の予測モデルを作成する.
主な方法:
- 初期段階のIPSC由来心筋細胞から心臓組織を形成する.
- 組織は徐々に強度が上がるような 身体的条件付けを受けます
- 組織を4週間培養して成熟度を評価する.
主要な成果:
- 4週間で成人のような遺伝子発現のプロフィールと 組織的な超構造を達成した
- 生理学的サルコメア長さ,ミトコンドリア密度,横管が示されている.
- 酸化代謝,機能的なカルシウム処理,そして正の力-周波数関係.
- 電気機械的性質は他の特性よりもゆっくりと成熟した.
結論:
- 身体的トレーニングは,iPSC由来の心臓組織の成熟を加速する.
- 成熟したiPSC由来心臓組織は,心臓の発達と疾患を研究するのに適しています.
- このアプローチは,患者特有の心臓モデルの予測力を高めます.
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