补肾益髓方及其拆方对实验性自身免疫性脑脊髓炎小鼠脑和脊髓中p-Tau和Beta-tubulin表达的影响

目的:观察补肾益髓(Bu Shen Yi Sui,BSYS)方及其拆方补肾(Bu Shen,BS)和化痰活血(Hua Tan Huo Xue,HTHX)方对实验性自身免疫性脑脊髓炎(Experimental Autoimmune Encephalomyelitis,EAE)小鼠脑和脊髓中p-Tau和Beta-tubulin的作用.方法:C57 BL/6小鼠雌性随机分为正常对照(NC)、模型(MO)、醋酸泼尼松(PA)、梓醇(CA)、BSYS、BS和HTHX组.造模当天与造模后第7天于小鼠背部两侧皮下注射抗原,即50 μg髓鞘少突胶质细胞糖蛋白(MOG)3565、完全弗氏佐剂(CFA)与结核分支杆菌(TB)混合,并在免疫当天和2d后腹腔注射500 ng的百日咳毒素(PTX).每天对小鼠进行灌胃,观察其体重及神经功能评分,并于造模第20 d和第40d分别取脑和脊髓进行病理检测.采用免疫组化法检测p-Tau和beta-tubulin的表达.结果:与MO组比较,BSYS、BS和HTHX组体重与神经功能评分均出现明显上升,HE染色可观察到炎细胞显著减少,核固缩减轻,同时,BSYS、BS和HTHX方均可明显下调p-Tau表达(P＜0.05,P＜0.01),上调beta-tu-bulin蛋白表达(P＜0.05,P＜0.01).结论:BSYS方及其拆方BS和HTHX均对EAE小鼠有神经保护作用,表现在减少体重丢失,降低神经功能评分,减轻炎炎性细胞浸润,减轻轴突损伤及促进其修复,尤以BSYS全方更为显著.

Objective:The aim of this study was to investigate the impact of beta-elemene injection on the growth and beta-tubulin of human hepatocarcinoma HepG2 cells. Methods:cellproliferation was assessed by MTT assay. cellcycle distribution was detected by flow cytometry (FCM). The mRNA expression of beta-tubulin was measured by RT-PCR. West-ern blot analysis was used to determine protein expression of beta-tubulin and the polymerization of beta-tubulin. Results:Beta-elemene injection inhibited HepG2 cells proliferation in a dose-and time-dependent manner;FCM analysis indicated beta-elemene injection induced cellcycle arrested at S phase. RT-PCR and western-blot analysis showed that beta-elemene injection down-regulated beta-tubulin expression at both mRNA and protein levels, presenting a dose-dependent manner. Moreover, beta-elemene injection reduced the polymerization of microtubules in a dose-dependent manner. Conclusion:Beta-elemene injection can inhibit the proliferation of hepatoma HepG2 cells, the mechanism might be partly related to the down-regulation of beta-tubulin and inhibition of microtubular polymerization.

非小细胞肺癌"个体化"化疗研究进展

非小细胞肺癌NSCLC的发病率和死亡率近年都呈上升趋势,化疗是有效的全身治疗,目前好的联合方案其有效率仅为20%-40%.要进一步提高疗效就需要更合理,更准确的用药;而能否针对不同分子生物学特点的NSCLC进行药物疗效的预测是关键.近年来随着肿瘤分子生物学的发展,已发现ERCC1,RRM1,Beta-tubulin,BRCA1及胸苷酸合成酶(thymidylate synthetase,TS)的表达水平和化疗药物疗效及预后密切相关,并有可能成为预测疗效进行"个体化"化疗的重要因素.本文就这一领域的一些研究作一简单综述.