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c-kit 功能障碍影响心肌梗塞后的心肌愈合
Massimo Cimini1, Shafie Fazel, Sun Zhuo
1Division of Cardiovascular Surgery, Toronto General Hospital, University Health Network, University of Toronto, Ontario, Canada.
Circulation
|September 14, 2007
概括
骨髓c-kit受体功能对于心肌梗塞 (MI) 后的心脏修复至关重要. 增强c-kit+细胞透可能会改善心脏愈合并减少心脏病发作的扩张.
科学领域:
- 心血管生物学 心血管生物学
- 血液学 血液学 血液学
- 再生医学是一种再生医学.
背景情况:
- 在骨髓干细胞中c-kit受体功能的作用正在研究其在心脏修复方面的潜力.
- 心肌梗塞 (MI) 引发了一种复杂的愈合过程,其中骨髓衍生细胞可能发挥重要作用.
研究的目的:
- 评估c-kit受体功能在骨髓中对心脏重塑和心肌梗塞 (MI) 后的修复的重要性.
- 为了研究c-kit+细胞对心脏病发作的扩张,血管化和肌纤维细胞反应的影响.
主要方法:
- 使用了Kit ((W) /Kit ((W-v) c-kit突变小鼠和野生类型的 littermates 来研究心脏重塑冠状动脉带后.
- 使用显微镜和流式细胞计量评估了心室扩张,心脏病发作扩张,光滑肌肉的α-actin表达细胞和CD31表达血管.
- 从野生类型移植到突变小鼠的骨髓移植,以评估功能性c-kit+细胞的救援效果.
主要成果:
- 与野生类型对照相比,缺乏功能性c-kit的突变小鼠表现出明显更大的心室扩张和心脏病扩张.
- 在突变小鼠中观察到,生殖和总光滑肌肉α-actin表达细胞和CD31表达血管的显著减少.
- 骨髓移植恢复了突变小鼠的血管化和肌纤维细胞群,导致心脏病扩张减少.
结论:
- 骨髓c-kit功能对于心脏梗塞中肌纤维细胞修复反应至关重要.
- 旨在增加c-kit+细胞透的干预措施有望促进内源性修复,预防心脏病扩张和改善心脏功能.
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