不同组织膜蛋白及二甲基亚砜对小脑颗粒细胞突起生长的影响

目的探讨不同组织膜蛋白提取物和二甲基亚砜对大鼠小脑颗粒细胞（CGC）突起生长的影响。方法提取成年大鼠肝、坐骨神经和脑白质的组织膜蛋白包被盖片，接种CGC于盖片上，同时将二甲基亚砜（DMSO）作为添加剂加入培养液，观察CGC突起的生长。结果①脑白质膜蛋白能明显抑制CGC突起的生长，随浓度增加抑制效应更加明显；坐骨神经膜蛋白对CGC突起生长抑制不明显，肝组织膜蛋白则能促进突起生长；②随DMSO浓度升高CGC突起生长逐渐受到抑制，当DMSO浓度小于1％时，CGC突起长度与对照对照差别不大。结论脑白质膜蛋白对CGC突起生长有明显抑制作用，而DMSO添加到培养液中在低浓度时不会显著影响神经元突起生长，可用于检测药物及疏水性分子对体外培养的神经细胞突起生长的作用。

Effects of different membrane proteins and dimethylsulfoxide on neurite growth of cerebellum granule cells

Objective To observe the effects of different membrane proteins and dimethylsulfoxide on neurite outgrowth of cerebellum granule cells(CGC).Methods Membrane proteins were extracted from the liver,sciatic nerve and brain white matter of adult rats and coated on the cover slips.CGC were dissociated from newborn rats and inoculated on the coated cover slips,while dimethylsulfoxide(DMSO) was added into the CGC suspension.Results The neurite outgrowth was inhibited by membrane protein of brain white mater and the effect was concentration-dependent.Low concentration(<1%) of DMSO did no harm to CGC,but higher concentration was fatal.Conclusion Neurite outgrowth of CGC can be blocked by membrane protein of CNS myelin and DMSO might be used as a solvent to add into culture medium to detect the role of hydrophobic molecules or medicine in neurons in vitro.