年轻的Sca-1骨髓干细胞衍生外体通过miR-150-5p/MEKK3/JNK/c-Jun通路保持视觉功能,以减少M1微质极化
Yuan Wang1,2, Wan-Yun Qin1,2, Qi Wang1,2,3
1Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.
Journal of nanobiotechnology
|June 15, 2023
概括
年轻的Sca-1+外体,富含miR-150-5p,通过减少炎症和细胞死亡来保护缺血-再输液损伤后的视网膜. 这为保护视力提供了一个有前途的无细胞疗法.
科学领域:
- 眼科医生 眼科 眼科
- 免疫学 免疫学 免疫学
- 再生医学是一种再生医学.
背景情况:
- 在视网膜缺血-再输液 (I/R) 损伤中,微质两极分化至关重要,影响损伤和修复.
- 衰老会损害微质功能,减少视网膜的修复后I / R.
- 年轻的Sca-1+细胞在I/R后老年小鼠中显示出优越的修复潜力.
研究的目的:
- 研究来自年轻Sca-1+细胞的外体的治疗潜力,用于治疗老年视网膜I/R损伤.
- 阐明潜在的分子机制,特别是微RNAs在外体介导修复中的作用.
主要方法:
- 从年轻的Sca-1+和Sca-1细胞中分离出外体,并给老年小鼠进行视网膜后I/R.
- 生物信息学,miRNA测序,RT-qPCR和西部斑被用于分析外体细胞的内容和分子通路.
- 免疫光和H&E染色评估了微质极化,质细胞存活率和视网膜形态.
主要成果:
- 与Sca-1外体相比,Sca-1+外体治疗改善了视觉功能,并减少了炎症标志物.
- 在Sca-1+外基因组中,miR-150-5p的含量较高,通过RT-qPCR得到证实.
- miR-150-5p针对MEKK3/JNK/c-Jun通路,降低了促炎性细胞因子和M1微质极化,从而降低了细胞亡.
结论:
- 富含miR-150-5p的Sca-1+外生体代表了一种针对视网膜I/R损伤的新型无细胞治疗策略.
- 通过这些外体对 miR-150-5p/MEKK3/JNK/c-Jun 轴进行向,可以促进神经保护并保持视觉功能.
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