蛇床子素通过Wnt/β-catenin信号通路促进转染APP基因的神经干细胞分化为更多神经元且减少神经元凋亡  被引量:17

Osthole promotes differentiation into neurons and reduces neuronal apoptosis via Wnt/β-catenin signaling pathway in APP transduced neural stem cells

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作  者:姚璎珈 孔亮[1] 教亚男 李少恒[1] 陶震宇 闫宇辉[1] 杨静娴[1] 

机构地区:[1]辽宁中医药大学药学院药理学教研室,辽宁大连116600

出  处:《中国药理学通报》2015年第11期1516-1523,共8页Chinese Pharmacological Bulletin

基  金:国家自然科学基金资助项目(No 81173580)

摘  要:目的通过转染APP基因于神经干细胞,研究蛇床子素对其增殖和分化能力的影响,及对神经元凋亡的影响,并研究其机制。方法体外建立阿尔茨海默病的神经干细胞模型,利用免疫组化染色法,研究蛇床子素对转染APP基因的神经干细胞增殖和分化能力的影响;通过CCK-8法检测神经干细胞存活率;Hoechst 33258法检测神经元凋亡情况;RT-PCR法检测GSK-3β和β-catenin mRNA的表达变化情况;Western blot法检测GSK-3β和β-catenin蛋白的表达变化情况。结果与APP组相比,蛇床子素组的神经干细胞增殖能力提高了10.24%;分化为神经元的能力提高了6.74%。与APP组相比,蛇床子素组神经干细胞的存活率明显提高;神经元凋亡明显减少;RT-PCR和Western blot结果显示,蛇床子素可抑制GSK-3β基因和蛋白的表达,促进β-catenin基因和蛋白的表达。结论蛇床子素可促进转染APP基因的神经干细胞的增殖,可促进其分化为更多的神经元,并减少神经元凋亡,可能与通过激活Wnt/β-catenin信号通路有关系。Aim To investigate the effects of osthole ( Ost) on the ability of proliferation and differentiation in APP transduced neural stem cells( NSCs) , and neu-ronal apoptosis, in order to find related mechanism. Methods A model of Alzheimer′s disease( AD) cells was successfully established by transducing APP gene into NSCs in vitro. The ability of proliferation and dif-ferentiation was tested by staining. The viability of NSCs was determined by using CCK-8 assay. The cell apoptosis was tested by Hoechst 33258 staining. The expression of GSK-3β and β-catenin mRNA was deter-mined by RT-PCR. The expression of GSK-3β and β-catenin protein was determined by Western blot. Re-sults The ability of proliferation had increased by 10 . 24% with Ost treatment, compared with APP group. The ability of differentiation had increased by 6 . 74%with Ost treatment, compared with APP group. The vi-ability of NSCs had increased and cell apoptotic rate had decreased significantly. From the results of RT-PCR and Western blot, we could find the expression of GSK-3βmRNA and protein had decreased, and the ex-pression of β-catenin mRNA and protein had increased significantly, compared with APP group. Conclusion Ost could enhance the ability of proliferation and dif-ferentiation into more neurons of NSCs transducing APP gene, and reduce neuronal apoptosis. It might be relat-ed with activiting Wnt/β-catenin signaling pathway.

关 键 词:阿尔茨海默病 神经干细胞 增殖 分化 神经元 蛇床子素 WNT/Β-CATENIN信号通路 

分 类 号:R284.1[医药卫生—中药学] R322.8[医药卫生—中医学]

 

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