在LPC诱导的脱髓化中,SIRT6通过准星状细胞CHI3L1来调节损伤的微环境
Jingyi Du1, Yue Yin1, Dong Wu1
1Key Laboratory for Experimental Teratology of Ministry of Education, Shandong Key Laboratory of Mental Disorders and Intelligent Control, Department of Anatomy and Histoembryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, China.
Journal of neuroinflammation
|September 28, 2024
概括
Sirtuin6 (SIRT6) 蛋白质促进中枢神经系统 (CNS) 中的髓修复. 激活SIRT6有助于在多发性硬化症 (MS) 等脱髓化疾病中的复髓化和功能恢复,而抑制它则会使结果恶化.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 脱髓化是中枢神经系统 (CNS) 神经退行性疾病的标志,特别是多发性硬化症 (MS),炎症微环境阻碍了髓修复.
- Sirtuin6 (SIRT6) 是一种基因素/蛋白质脱乙酶,因其在基因调节,细胞循环,炎症,新陈代谢和寿命方面的作用而闻名.
研究的目的:
- 调查Sirtuin6 (SIRT6) 在中枢神经系统中脱髓化后的复髓化过程中的作用.
- 探索调节SIRT6活动的潜力,作为一种治疗策略,以增强像MS这样的疾病中的髓再生.
主要方法:
- 使用了酸胆 (LPC) 诱导的脱髓化小鼠模型.
- 使用药理学SIRT6抑制剂和激活剂来评估功能恢复和髓再生.
- 在体组织上进行RNA测序分析,以确定SIRT6.6调节的分子通路.
- 在体外和体内使用腺相关病毒 (AAV) 载体,研究了SIRT6,天体细胞和寡基细胞前体细胞 (OPC) 之间的相互作用.
主要成果:
- 抑制SIRT6会损害髓再生,恶化神经缺陷,并降低基细胞前体细胞 (OPC) 增殖和分化.
- 激活SIRT6改善了运动和认知功能,证明对复髓化有有益影响.
- SIRT6 调节在复髓化过程中的质激活,特别影响CHI3L1 (由星球细胞分泌的糖蛋白) 的分泌.
- 天体细胞SIRT6通过基因素乙化 (H3K9Ac) 控制CHI3L1分泌;在天体细胞中由AAV介导的SIRT6过度表达促进了回髓化,这种效应被AAV-CHI3L1共同过度表达抵消了.
结论:
- 在促进中枢神经系统复髓化和功能恢复方面,SIRT6起着至关重要的作用.
- 天体细胞SIRT6/CHI3L1轴被确定为复髓化微环境的关键调节器.
- 向天体细胞SIRT6是一个有希望的治疗途径,可以增强MS和其他脱髓化疾病中的髓蛋白修复.
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