黄芪总皂甙对Wnt/β-catenin信号通路及神经干细胞分化的影响

doi:10.3969/j.issn.1006-9771.2018.11.005

《中国康复理论与实践》 ›› 2018, Vol. 24 ›› Issue (11): 1264-1270.doi: 10.3969/j.issn.1006-9771.2018.11.005

黄芪总皂甙对Wnt/β-catenin信号通路及神经干细胞分化的影响

漆国栋^{1, 2, 3}, 伍亚民², 漆伟³, 刘超智², 江琼¹

1.重庆医科大学中医药学院,中医药防治代谢性疾病重庆市重点实验室,重庆市 400016;
2.中国人民解放军陆军军医大学附属大坪医院野战外科研究所三室,创伤烧伤与复合伤国家重点实验室,重庆市 400042;
3.重庆市中医骨科医院,重庆市 400010

收稿日期:2018-07-24 修回日期:2018-09-10 出版日期:2018-11-20 发布日期:2018-12-26
通讯作者: 江琼。E-mail: 310892671@qq.com
作者简介:漆国栋(1993-),男,汉族,重庆市人,硕士研究生,主要研究方向：干细胞与神经康复。
基金资助:
1.国家自然科学面上项目(No. 30772299); 2.重庆市卫计委中医药科技项目(No. ZY201702134)

Effects of Total Saponins of Astragalus on Neural Stem Cells Differentiating and Wnt/β-catenin Signaling Pathway

QI Guo-dong^{1, 2, 3}, WU Ya-min², QI Wei³, LIU Chao-zhi², JIANG Qiong¹

1. Chongqing Medical University College of Chinese Medicine, Chongqing Key Laboratory of Traditional Chinese Medicine for Prevention and Cure of Metabolic Diseases, Chongqing 400016, China;
2. Three Department of Field Surgery Research Institute, Daping Hospital, PLA Military Medical University, State Key Laboratory of Trauma Burn and Complex Injury, Chongqing 400042, China;
3. Chongqing Orthopaedics Hospital of Traditional Chinese Medicine, Chongqing 400010, China

Received:2018-07-24 Revised:2018-09-10 Published:2018-11-20 Online:2018-12-26
Contact: JIANG Qiong. E-mail: 310892671@qq.com
Supported by:
Supported by National Natural Science Foundation of China (General) (No. 30772299) and Chongqing Health and Family Planning Committee Traditional Chinese Medicine Research Project (No. ZY201702134)

摘要/Abstract

摘要： 目的观察黄芪总皂甙(TSA)调控体外培养大鼠神经干细胞(NSCs)向神经元方向分化的作用及其有效浓度,并研究其Wnt/β-catenin信号通路相关机制。方法新生24 h大鼠大脑皮层来源NSCs进行原代、传代培养并鉴定,通过CCK-8试剂盒初筛TSA诱导分化的可能有效浓度。取第三代NSCs,设不加TSA的正常组和不同浓度TSA实验组,分化培养7 d后,间接免疫荧光法和Western blotting检测微管相关蛋白2 (MAP-2)和胶质纤维酸性蛋白(GFAP)表达。另设正常组、最佳浓度TSA组、TSA+Wnt/β-catenin信号通路抑制剂ICG-001组和ICG-001组,分化培养7 d后,Western blotting检测各组Wnt3/3a、β-catenin和抗神经原素1 (Ngn1)蛋白表达。结果 TSA在浓度1×10^-4 mol/L、1×10^-5 mol/L、1×10^-6 mol/L时,NSCs数量显著增加(P < 0.001)。TSA能增加NSCs分化为神经元的比例,1×10^-5 mol/L最佳(P < 0.05)。TSA能上调Wnt3/3a、β-catenin与Ngn1蛋白的表达(P < 0.05)。结论 TSA能促进体外培养NSCs向神经元方向分化,与激活Wnt/β-catenin信号通路,从而调控该通路下游促分化靶向蛋白Ngn1的表达有关。TSA最佳促神经元方向分化浓度约为1×10^-5 mol/L。

关键词: 黄芪总皂甙, 神经干细胞, 分化, Wnt/β, -catenin信号通路, 大鼠

Abstract: Objective To observe the effects of total saponins of Astragalus (TSA) on neural stem cells (NSCs) differentiating to neuron in vitro and the best concentration, as well as the role of Wnt/β-catenin signaling pathway in it. Methods NSCs from the cerebral cortex of a neonatal rat were cultured and identified. The possible effective concentration of TSA was screened with Cell Counting Kit-8 (CCK-8). The third generation of NSCs was induced as normal group (without TSA) and various concentration of TSA groups for seven days. The expression of microtubule-associated proteins (MAP-2) and glial fibrillary acidic protein (GFAP) was detected with indirect immunofluorescence and Western blotting to detect the ratio of neuron and astrocyte. Then, the third generation of NSCs was induced as normal group (without TSA), the best concentration of TSA group, TSA group and inhibitor ICG-001 group, and ICG-001 group, for seven days, and the expression of Wnt3/3a, β-catenin and neurogenin 1 (Ngn1) was detected with Western blotting. Results TSA promoted the NSCs proliferation in the concentration of 1×10^-4 mol/L, 1×10^-5 mol/L and 1×10^-6 mol/L (P < 0.001), and increased the proportion of neurons, especially in the concentration of 1×10^-5 mol/L (P < 0.05). TSA increased the expression of Wnt3/3a, β-catenin and Ngn1. Conclusion TSA could promote NSCs differentiating into neurons in vitro, which may associate with the activation of the Wnt/β-catenin signaling pathway and the expression of differentiation-promoting target protein Ngn1. TSA can do it best in the concentration about 1×10^-5 mol/L..

Key words: total saponins of Astragalus, neural stem cells, differentiation, Wnt/β-catenin signaling pathway;, rats

中图分类号:

R741.05

漆国栋, 伍亚民, 漆伟, 刘超智, 江琼. 黄芪总皂甙对Wnt/β-catenin信号通路及神经干细胞分化的影响[J]. 《中国康复理论与实践》, 2018, 24(11): 1264-1270.

QI Guo-dong, WU Ya-min, QI Wei, LIU Chao-zhi, JIANG Qiong. Effects of Total Saponins of Astragalus on Neural Stem Cells Differentiating and Wnt/β-catenin Signaling Pathway[J]. 《Chinese Journal of Rehabilitation Theory and Practice》, 2018, 24(11): 1264-1270.

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黄芪总皂甙对Wnt/β-catenin信号通路及神经干细胞分化的影响

Effects of Total Saponins of Astragalus on Neural Stem Cells Differentiating and Wnt/β-catenin Signaling Pathway

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