表观遗传机制调节骨髓前代细胞的心脏修复功能中的性别差异
Charan Thej1, Rajika Roy2, Zhongjian Cheng1
1Aging and Cardiovascular Discovery Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, 19140, USA.
NPJ Regenerative medicine
|April 29, 2024
概括
心脏细胞治疗中的性别差异与表观遗传调节有关. 由于表观遗传修饰,女性原生细胞显示出增强的心脏修复能力,突出显示了捐赠细胞性别的重要性.
科学领域:
- 心血管生物学 心血管生物学
- 干细胞疗法是一种干细胞疗法.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 心血管疾病 (CVD) 发病率在女性中较低,通常归因于女性荷尔蒙.
- 对心脏修复的骨髓干细胞 (BMSC) 试验主要使用男性受试者,尽管分析表明绝经后妇女的结果更好.
- 受性激素影响的BMSCs对性别特异性心脏修复的机制尚不清楚.
研究的目的:
- 调查控制骨髓干细胞 (BMSCs) 心脏修复活动的性别特异性机制.
- 探索性激素和表观遗传调节在BMSC介导的心脏修复中的作用.
主要方法:
- 对来自小鼠的雄性 (M),雌性 (F) 和经过卵巢切除的雌性 (OVX) 内皮原生细胞 (EPC) 的比较分子和表观遗传学分析.
- 在心肌梗塞 (MI) 的雄性小鼠模型中,在心内注射EPC后,对心脏修复的体内功能评估.
- 表观遗传测序以识别基因组修饰的差异,特别是H3K9me3占用率.
主要成果:
- 与男性EPC (M-EPC) 相比,女性EPC (F-EPC) 和经过卵巢切除的女性EPC (OVX EPC) 呈现较低的炎症特征,并促进心脏中风后心脏修复的增强.
- 表观遗传学分析显示,在M-EPCs和F/OVX-EPCs之间的血管和炎症性基因的转录开始部位上,有明显的H3K9me3标记占用.
- 在EPC功能中的性别差异部分是由CCL3基因的差异性表观遗传调节介导的,由基因组甲基转移酶G9a/Ehmt2通过H3K9me3.3.2控制.
结论:
- 在EPC中,功能性性别差异受到表观遗传调节的显著影响,特别是H3K9me3.3.
- 促炎和抗血管性基因CCL3是这种性别特异性表观遗传控制的关键目标.
- 捐赠细胞的性别是一个关键因素,可以考虑优化基于前代的心脏组织修复策略.
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