神经连接蛋白1、2对少突胶质细胞分化与髓鞘形成的促进作用  

Positive effects of neuroligin-1,-2 on oligodendrocyte differentiation and myelination

作　　者：张小娇 朱明媚 王家彦 汤欣 ZHANG Xiao-jiao;ZHU Ming-mei;WANG Jia-yan;TANG Xin(Key Laboratory for Neuroregeneration of Jiangsu Province and Ministry of Education,Co-Innovation Center of Neuroregeneration,Nantong University,Jiangsu Nantong 226001,China)

机构地区：[1]南通大学神经再生重点实验室,神经再生协同创新中心,江苏南通226001

出　　处：《解剖学报》2024年第2期125-132,共8页Acta Anatomica Sinica

基　　金：国家自然科学基金(81971761)。

摘　　要：目的探讨神经连接蛋白1、2(NLGN-1、-2)对少突胶质细胞(OLs)分化和中枢神经系统髓鞘形成的作用。方法体外培养OLs,用不同浓度(80μg/L、200μg/L、500μg/L)的NLGN-1、-2处理细胞,通过免疫荧光染色观察OLs的分化,利用Real-time PCR检测髓鞘相关基因的表达,利用Western blotting技术检测髓鞘相关蛋白的表达。结果NLGN-1、-2能够促进少突胶质前体细胞(OPCs)分化为成熟的OLs,提高OLs髓鞘形成的能力,且在体外条件下500μg/L促进效果最优,NLGN-2的促进效果优于NLGN-1。同时,Real-time PCR检测到最佳浓度处理后髓鞘相关基因髓磷脂P0蛋白(MPZ)、髓磷脂碱性蛋白(MBP)的mRNA表达水平升高。Western blotting结果表明,500μg/L NLGN-1和NLGN-2处理OLs 12 h后MBP和MPZ蛋白表达量显著升高。结论NLGN-1、-2能够促进OLs分化进而提高OLs髓鞘形成的能力,且NLGN-2的促进效果优于NLGN-1,提示加入抑制性突触的细胞因子有利于提高中枢胶质细胞的髓鞘形成能力。Objective To investigate the effects of neuroligin-1,-2(NLGN-1,-2)on oligodendrocyte(OLs)differentiation and myelination in the central nervous system.Methods OLs were cultured in vitro in the presence of different concentrations of NLGN-1 and NLGN-2.Morphological differentiation of OLs was observed by immunofluorescent staining and mRNA expression levels of myelin-associated genes were detected by Real-time PCR.Western blotting was used to detect the expression of myelin-related proteins.Results NLGN-1,-2 accelerated the differentiation of oligodendrocyte precursor cells(OPCs)into mature OLs,and promoted the ability of myelin sheath formation.In vitro culture conditions,the dosage of 500μg/L had the best promotion effect on OLs differentiation and maturation,and NLGN-2 had better promoting effect than that of NLGN-1.Furthermore,the mRNA expression levels of myelin-associated genes myelin protein P0(MPZ),myelin basic protein(MBP)increased after the neuroligins treatments detected by Real-time PCR.Western blotting result showed that the expressions of MBP and MPZ increased significantly after 500μg/L treatment with NLGN-1 and NLGN-2 for 12 hours.Conclusion NLGN-1,-2 promote OLs differentiation and myelination.The positive effect of NLGN-2 is greater than that of NLGN-1 significantly,suggesting that the treatment with inhibitory synaptic-associated cytokines may improve the ability of myelin sheath formation in the central nervous system.

关 键 词：神经连接蛋白 少突胶质细胞 髓鞘形成 免疫荧光 大鼠 

分 类 号：Q421[生物学—神经生物学]