经过EPO修饰的MSCs通过依赖REST的表观遗传改造来保护SH-SY5Y细胞免受缺血/缺氧诱导的亡
Yu Jiang1, Ruibo Li1, Yueyao Ban1
1Department of Neurosurgery, Zhengzhou Central Hospital Affiliated Zhengzhou University, Zhengzhou, 450000, China.
Scientific reports
|October 6, 2024
概括
基因工程转基因干细胞 (MSCs) 分泌人造蛋白质 (EPO) 保护神经元免受缺氧缺血性脑病变 (HIE) 损伤. 这些EPO-MSC通过改变表观遗传修饰来减少亡和炎症,提供潜在的HIE治疗.
科学领域:
- 神经科学是一个神经科学.
- 再生医学是一种再生医学.
- 干细胞生物学 干细胞生物学
- 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:
- 缺氧性缺血性脑病变 (HIE) 导致扩散性脑损伤,中介细胞干细胞 (MSC) 治疗对神经元缺陷有希望.
- 在HIE后的MSC生存能力和耐受性方面仍然存在挑战,需要基因工程来增强再生能力.
- 人类带MSCs (hUC-MSCs) 中的红素 (EPO) 表达因缺氧而增加;工程化EPO-MSCs在细胞外分泌EPO.
研究的目的:
- 研究EPO修饰的hUC-MSCs (EPO-MSCs) 在缺氧缺血性脑病变 (HIE) 中的神经保护作用.
- 阐明了EPO-MSCs治疗益处的潜在表观遗传调节机制.
- 为EPO基因修饰的hUC-MSCs在治疗HIE时的临床应用提供理论基础.
主要方法:
- 建立了一个氧气-葡萄糖剥夺 (OGD) 诱导的SH-SY5Y细胞模型用于HIE.
- 使用了LEGENDplexTM流细胞计,CUT&Tag测序,RNA-seq,qRT-PCR和西部斑检测.
- 通过lentiviral vector感染构建了REST敲除SH-SY5Y细胞,以评估亡和表观遗传修饰.
主要成果:
- EPO-MSCs显示出显著的EPO分泌,表现出抗亡性质,并提供神经元保护,防止缺血性-缺氧性损伤.
- 在EPO-MSC治疗后,RNA-seq揭示了与炎症相关的基因的下调和RE1-沉默转录因子 (REST) 表达的上调.
- EPO-MSCs影响了H3K4me2的修改,可能激活REST和TET3,并上调SETD2-介导的H3K36me3,影响炎症和亡基因.
结论:
- 经过EPO修饰的hUC-MSC在HIE模型中提供显著的神经保护和抗亡作用.
- 治疗机制涉及表观遗传修饰,包括改变H3K4me2和H3K36me3,影响关键调节基因.
- EPO-MSCs为HIE提供了一个有前途的治疗策略,通过基因改造有可能提高疗效.
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