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在心脏病发作后的老鼠心肌中进行异构性介质干细胞移植:短期和长期影响
Wangde Dai1, Sharon L Hale, Bradley J Martin
1The Heart Institute, Good Samaritan Hospital, Division of Cardiovascular Medicine of Keck School of Medicine at University of Southern California, Los Angeles, CalifA 90017, USA.
Circulation
|July 7, 2005
概括
介质干细胞 (MSCs) 在老鼠心肌梗塞后暂时改善了心脏功能. 虽然MSCs存活了6个月,并显示了一些心脏标志物,但功能上的好处是暂时的,这表明了膜效应.
科学领域:
- 再生医学是一种再生医学.
- 心血管研究研究心血管研究
- 干细胞生物学 干细胞生物学
背景情况:
- 介质细胞干细胞 (MSC) 显示出替代心肌梗塞痕组织的潜力.
- MSC移植对心脏功能的长期影响在很大程度上是未知的.
- 这项研究研究了MSCs对心肌梗塞 (MI) 后左心室 (LV) 功能在老鼠模型中的短期和长期影响.
研究的目的:
- 评估中干细胞 (MSC) 移植对左心室 (LV) 功能的短期和长期影响.
- 评估在心肌梗塞中植入的MSC的生存,分化和功能贡献.
主要方法:
- 用DI标记的介质干细胞 (MSC) 被注射到发作1周后的老鼠的心肌痕.
- 对照组接受了盐水注射.
- 左心室 (LV) 功能,包括射出分数和中风体积,在4周和6个月后进行评估.
- 分析了植入细胞的存在,分化 (肌肉特异性标记物) 和表型.
主要成果:
- 在移植后4周,MSC治疗显著增加了与液对照组相比,LV中风体积和射出分数.
- 这些功能性改善在6个月的随访中没有持续.
- 被DiI标记的MSC在6个月时被检测到,表达了一些肌肉和内皮标记物,但没有完全成熟成成人心脏细胞.
结论:
- 异构性MSC可以在心肌梗塞中存活至少6个月.
- 在移植后4周,MSCs表现出全球LV功能的暂时改善.
- 功能性益处的暂时性表明MSCs在心肌梗塞恢复过程中可能存在早期的膜作用机制.
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