灵芝孢子促进大鼠受损伤脊髓运动神经元存活及其轴突再生相关蛋白质组学的初步研究

目的:寻找与灵芝孢子促进受损伤脊髓运动神经元存活及其轴突再生相关的蛋白质。方法:SD大鼠随机分为正常对照组、模型组和灵芝孢子治疗组。模型组和灵芝孢子治疗组大鼠行脊神经腹根切断术。灵芝孢子治疗组大鼠胃饲灵芝孢子14 d。取各组大鼠脊髓灰质组织蛋白质,行双向电泳,采用基质辅助激光解吸离子化飞行时间质谱仪鉴定各组之间有明显差异表达的蛋白质。结果:各组之间共有6种蛋白质的表达存在差异,分别是塌陷反应介导蛋白2(collapsin response mediator protein 2,CRMP-2)、纤维型肌动蛋白加帽蛋白β(F-actin capping protein beta subunit,FCP-β)、异柠檬酸脱氢酶β(isocitrate dehydrogenaseNAD]subunit beta,IDH-β)、三磷酸腺苷酶(ATPase)、谷氨酸草酰乙酸氨基转移酶1(glutamate oxaloace-tate transaminase-1,GOT1)和丙酮酸激酶-M2(M2 pyruvate kinase,M2-PK)。灵芝孢子治疗组CRMP-2、IDH-β、ATPase和GOT1的表达高于模型组,而FCP-β和M2-PK的表达则低于模型组。结论:灵芝孢子可能通过上调或下调上述蛋白质的表达,参与促进大鼠受损伤脊髓运动神经元存活及其轴突再生作用。

Primary study on proteomics about ganoderma lucidium spores promoting survival and axon regeneration of injured spinal motor neurons in rats

OBJECTIVE: To detect some proteins associated with the effect of ganoderma lucidium spores (GASP) on promoting the survival and axon regeneration of injured spinal motor neurons in rats. METHODS: The rats were divided into normal control group, untreated group and GASP-treated group, and the rats in the last two groups received ventral root avulsion. GASP preparation was fed to the rats in the GASP-treated group for 14 days. The gray matter tissues of the lumbar spinal were sampled from rats in each group after 14 days following ventral root avulsion, and the extracted proteins from these tissues were detected by using 2-dimensional electrophoresis. Matrix assisted laser desorption/ionization time-of-flight mass spectroscopy (MALDI-TOF MS) was utilized to identify the differentially expressed proteins among these three groups. RESULTS: There were six kinds of proteins differentially expressed among the three groups, which were collapsin response mediator protein 2 (CRMP-2), F-actin capping protein beta subunit (FCP-beta), isocitrate dehydrogenase NAD] subunit beta (IDH-beta), ATPase, glutamate oxaloacetate transaminase-1 (GOT1) and M2 pyruvate kinase (M2-PK). The expression levels of CRMP-2, IDH-beta, ATPase and GOT1 were higher in the GASP-treated group than those in the untreated group, while the expression levels of FCP-beta and M2-PK were lower than those in the untreated group. CONCLUSION: GASP maybe promotes the survival and axon regeneration of injured spinal motor neurons in rats by virtue of up- or down-regulating the expression levels of the proteins mentioned above.