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Intramyocardial Cell Delivery: Observations in Murine Hearts
Published on: January 24, 2014
エクストラカルディアック原始細胞は,移植されたヒト心臓のほとんどの主要な細胞タイプを再生します
Elina Minami1, Michael A Laflamme, Jeffrey E Saffitz
1Division of Cardiology, Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA.
Circulation
|November 9, 2005
まとめ
心臓外親細胞は,移植後に心臓細胞を再生し,内皮細胞は最も高い統合を示します. この早期で広範な内皮キメリズムは,移植の健康と拒絶に影響を与える可能性があります.
科学分野:
- 心血管生物学 心血管生物学
- 移植免疫学 移植免疫学
- 幹細胞生物学 幹細胞生物学
背景:
- 心臓外親細胞は,損傷後の心臓に統合することができるが,人間の心臓移植におけるその範囲は不明である.
- 以前の研究では,これらの細胞による限られた心筋細胞の再生が示されました.
研究 の 目的:
- 人間の心臓移植における内皮,滑らかな筋肉,シュワンの細胞キメリスムの程度を調査する.
- 異なる細胞タイプと血管サイズにおけるキメリズムレベルを比較する.
主な方法:
- 心臓移植を受けた患者の検体検体と内心筋組織生検の分析.
- 内皮 (CD31) 細胞,滑らかな筋肉 (アルファアクチン) 細胞,シュワン (S-100) 細胞に対する免疫ヒストケミストリー.
- 性別不一致の移植におけるドナー由来細胞を識別するためのY染色体インシットウハイブリデーション.
主要な成果:
- 内皮細胞は心臓外キメリズム (24.3%) を最も多く示し,次にシュワン細胞 (11.2%) と血管の滑らかな筋肉細胞 (3.4%) が続いた.
- 化学反応のレベルは,以前観察された心臓肌細胞 (0.04%) よりも著しく高かった.
- 高濃度の内皮キメリズムは,移植後1ヶ月で発見され,最大10年間持続し,マイクロ循環の有病率はより高い.
結論:
- エクストラカルディアック原始細胞は,異なる周波数で様々なタイプの心臓細胞を再生します.
- 内皮原産体の早期徴募は,移植関連の傷害の役割を示唆しています.
- 高い内皮キメリズムは,心筋の拒絶および移植血管病変に影響を与える可能性があります.
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