人参皂苷Rg1对人神经干细胞功能表达的膜片钳研究  被引量:7

Effect of ginsenoside Rg_1 on functional expression of human neural stem cells:a patch clamp study

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作  者:姜英虹[1] 李英博[1] 赵香琴[1] 陈笛[1] 姜蓉[2] 王莎莉[1] 

机构地区:[1]重庆医科大学神经科学研究中心,重庆市神经生物重点实验室,重庆400016 [2]重庆医科大学干细胞与组织工程研究室,重庆400016

出  处:《中国中药杂志》2012年第22期3477-3480,共4页China Journal of Chinese Materia Medica

基  金:重庆市渝中区科技计划项目(20110310)

摘  要:目的:观察人参皂苷Rg1诱导人神经干细胞(neural stem cells of human,hNSCs)的功能表达。方法:采用全细胞膜片钳技术分析人参皂苷Rg1诱导hNSCs分化7 d时,神经元样细胞的膜电生理特性以及钠、钾离子通道的功能表达。结果:人参皂苷Rg1(20 mg·L-1)诱导hNSCs分化7 d时,神经元样细胞的膜静息电位为(-45.70±2.63)mV,膜电容为(26.89±1.91)pF,膜输入阻抗为(877.51±20.44)MΩ(与对照组相比均P<0.05);电压依赖性的快速激活、快速失活的内向Na+电流,检出率50%,平均峰值为(711.48±158.03)pA(与对照组相比P<0.05);外向K+电流的主要成分是快速激活快速失活的瞬时外向K+电流和延迟整流外向K+电流,其平均峰值为(1 070.42±177.18)pA(与对照组相比P<0.05)。结论:人参皂苷Rg1可以促进hNSCs功能表达和成熟。Objective: To observe the effects of ginsenoside Rg1 on the functional expression of human neural stem cells (hNSCs). Method: The membrane electrophysiological properties and sodium and potassium ion channels in the hNSCs induced by Rg1 were analyzed using the whole-cell patch-clamp. Result: On the 7th day, the neuron-like cells derived from ginsenoside Rg1 (20 mg · L ^- 1 ) -induced NSCs show : (1) The resting membrane potential : ( - 45.70 ± 2.63 ) mV, the membrane capacitance : ( 26.89 ±1.91 ) pF, the membrane input impedance : ( 877.51 ± 20.44) MΩ ( P 〈 0.05 compared with the control group, respectively) ; (2) The detection rate of inward sodium current which is rapidly activated and inactivated in voltage-dependence was 50%, and its average peak value was (711.48 ± 158.03 ) pA (P 〈 0.05 compared with the control group) ; (3)The outward potassium currents were composed of rapidly activated and inactivated transient outward potassium current and delayed rectifier outward potassium current, and its average peak value was (1 070.42 ± 177.18) pA(P 〈0.05 compared with the control group). Conclusion: Ginsenoside Rg1 can promote the fnnctional expression and maturity of hNSCs.

关 键 词:人参皂苷RG1 人神经干细胞 功能表达 膜片钳 

分 类 号:R285[医药卫生—中药学]

 

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