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1.南京中医药大学 骨伤研究所,南京 210023
2.南京中医药大学 附属医院,南京 210029
[第一作者] 吴承杰,在读硕士,从事骨关节及脊髓损伤修复方面的研究,E-mail:782210632@qq.com
*郭杨,博士,研究员,从事骨关节及脊髓损伤修复方面的研究,E-mail:drguoyang@126.com
收稿日期:2019-05-20,
网络出版日期:2019-09-04,
纸质出版日期:2020-01-20
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吴承杰, 马勇, 郭杨, 等. 基于内质网应激探讨淫羊藿苷对受损神经元的影响[J]. 中国实验方剂学杂志, 2020,26(2):59-65.
Cheng-jie WU, Yong MA, Yang GUO, et al. Effect of Icariin on Damaged Neurons Based on Endoplasmic Reticulum Stress[J]. Chinese journal of experimental traditional medical formulae, 2020, 26(2): 59-65.
吴承杰, 马勇, 郭杨, 等. 基于内质网应激探讨淫羊藿苷对受损神经元的影响[J]. 中国实验方剂学杂志, 2020,26(2):59-65. DOI: 10.13422/j.cnki.syfjx.20192402.
Cheng-jie WU, Yong MA, Yang GUO, et al. Effect of Icariin on Damaged Neurons Based on Endoplasmic Reticulum Stress[J]. Chinese journal of experimental traditional medical formulae, 2020, 26(2): 59-65. DOI: 10.13422/j.cnki.syfjx.20192402.
目的:
2
从内质网应激的角度观察淫羊藿苷对受损神经元的影响,并探究其修复受损神经元的部分机制。
方法:
2
采用神经生长因子(NGF)将PC12细胞诱导分化为神经元,并使用流式细胞术测定微管相关蛋白2(MAP2)和神经元特异性烯醇化酶(NSE)表达阳性率进行鉴定。实验分为4组,空白组为PC12诱导分化的神经元细胞;溶剂组为PC12诱导分化的神经元+0.1%二甲基亚砜(DMSO);毒胡萝卜素组为PC12诱导分化的神经元+2 μmol·L
-1
毒胡萝卜素;淫羊藿苷组为PC12诱导分化的神经元+2 μmol·L
-1
毒胡萝卜素+0.1 μmol·L
-1
淫羊藿苷,使用细胞增殖活性检测试剂盒(CCK-8)法检测细胞的增殖,流式细胞术检测细胞的凋亡,蛋白免疫印迹法(Western blot)检测CCAAT/增强子结合蛋白同源蛋白(CHOP),葡萄糖调节蛋白78(Grp78)的蛋白表达,实时荧光定量聚合酶链式反应(Real-time PCR)检测CHOP,Grp78 mRNA表达。
结果:
2
与溶剂组比较,毒胡萝卜素组可抑制经NGF诱导的神经元样PC12细胞的增殖活性,可促使细胞凋亡,并能够上调CHOP,Grp78的表达(
P
<
0.05,
P
<
0.01);与毒胡萝卜素组比较,淫羊藿苷组可缓解毒胡萝卜素对神经元增殖活性的抑制,减少神经元凋亡,并能够下调CHOP,Grp78的表达(
P
<
0.05,
P
<
0.01)。
结论:
2
淫羊藿苷可通过下调CHOP和Grp78的表达抑制内质网应激,促进受损神经元的修复。
Objective:
2
To observe the effect of icariin on damaged neurons from the perspective of endoplasmic reticulum stress
in order to explore some mechanisms for repairing damaged neurons.
Method:
2
PC12 cells were induced by nerve growth factor (NGF) to differentiate into neurons
and the positive rate of microtubule associated protein-2 (MAP2) and neuron-specific enolase (NSE) expressions was determined by flow cytometry. The experiment was divided into 4 groups
blank control group: PC12 induced differentiation into neuronal cells
solvent control group: PC12 induced differentiation into neurons+ 0.1% dimethyl sulfoxide (DMSO)
thapsigargin group: PC12 induced differentiation into nerves Yuan+ 2 μmol·L
-1
thapsigargin
and icariin group: PC12 induced differentiation into neurons+ 2 μmol·L
-1
thapsigargin+ 0.1 μmol·L
-1
icariin. The proliferation of the cells was detected by using cell counting kit-8(CCK-8) method
the apoptosis of the cells was detected by flow cytometry
the protein expressions of CCAAT/enhace-binding protein homologous protein(CHOP) and glucoseregulated protein 78(Grp78) were detected by Western blot
and the mRNA expressions of CHOP and Grp78 were detected by real-time quantitative PCR (Real-time PCR).
Result:
2
Compared with the solvent control group
the thapsigargin group inhibited the proliferation of neuron-like PC12 cells induced by NGF
promoted apoptosis
and up-regulated the expressions of CHOP and Grp78 (
P
<
0.05
P
<
0.01). Compared with the thapsigargin group
the icariin group can alleviate the inhibition of neurotrophic activity by thapsigargin
reduce neuronal apoptosis
and down-regulate the expressions of CHOP and Grp78 (
P
<
0.05
P
<
0.01).
Conclusion:
2
Icariin can inhibit endoplasmic reticulum stress by down-regulating the expressions of CHOP and Grp78 and promote the repair of damaged neurons.
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