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促进内心血管发育和心脏再生的VEGF-B
Markus Räsänen1, Ibrahim Sultan1, Jennifer Paech1
1Wihuri Research Institute and Translational Cancer Medicine Program, Faculty of Medicine (M.R., I.S., J.P., K.A.H., E.A., R.K., K.A.).
Circulation
|November 18, 2020
概括
血管内皮生长因子B (VEGF-B) 在发育过程中促进新冠血管的生长,并在心脏病发作后有助于恢复. 在心肌梗塞后,VEGF- B疗法可以改善心脏功能.
科学领域:
- 心血管生物学
- 复原医学
- 分子心脏病学
背景情况:
- 最近的发现表明,阴道静脉和内心是支持心肌扩张的冠状血管生长的关键内皮来源.
- 由血管内皮生长因子B (VEGF-B) 诱导的冠状动脉的确切起源及其在心肌梗塞恢复中的作用需要进一步调查.
研究的目的:
- 调查心脏中对VEGF-B反应而形成的冠状血管的起源.
- 确定VEGF-B对心肌梗塞后心脏恢复的影响.
主要方法:
- 使用基因改造的小鼠和老鼠 (VEGF-B转基因,基因删除,谱系追踪) 和病毒基因转移.
- 使用心肌梗塞的手术诱导,细胞增殖标记,流细胞计和先进的成像技术 (微型CT,输液成像).
- 综合组织学,免疫组织化学,生物化学分析和单细胞RNA测序与生物信息分析.
主要成果:
- 在发育中的心脏中,心肌细胞特异性的VEGF- B过度表达刺激了来自心室的新血管生长.
- 在成年小鼠中,VEGF- B基因转移主要在心下冠状动脉中诱导了内皮增殖.
- 治疗前或同时进行冠状动脉结合的VEGF- B基因转移增强了内心血管的生长,改善了心脏的重塑和功能.
结论:
- 心肌VEGF-B在发育过程中促进心内衍生冠状动脉的形成,并刺激成人心下区域的内皮增殖.
- 在心肌梗塞后,VEGF- B促进心脏组织的结构和功能恢复.
- VEGF-B是一种有前途的治疗策略,用于促进心脏新血管化和挽救心脏缺血后冠状动脉封闭.
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