排序方式: 共有21条查询结果,搜索用时 15 毫秒
1.
应用制霉菌素穿孔全细胞电压钳技术.在急性分离的大鼠骶髓后连合核(SDCN)神经元上,研究抑制性氨基酸诱导的反应的电生理学和药理学特性。当钳制电压为-40mV时,γ-氨基丁酸(GABA)、甘氨酸(Gly)和牛磺酸(Tau)均诱导产生内向电流。它们的EC50值分别是GABA5.2×10-5M,Gly4.0×10-5M及Tau1.6×10-4M。其Hill系数分别为GABA1.21,Gly1.27和Tau1.23。所有这些电流均在膜电位为-1.8mV左右时翻转。此外.Tau和Gly反应问还存在很强的交叉脱敏。结果提示,GABAA,Gly和Tau作为递质,通过受体Cl-通道复合体.在调节SDCN社经元伤害性传递中可能有重要作用。 相似文献
2.
3.
To isolate rat sacral dorsal commissural neurons (SDCN). METHODS: Using enzymatic and mechanical dissociation techniques to isolate the neurons and using nystatin perforated patch technique to evaluate their functional state. RESULTS: The isolated neurons exhibited good responses to excitatory and inhibitory amino acids. The responses of SDCN to N-methyl-D-aspartate were markedly potentiated by substance P and trans-1-aminocyclopentane-1,3-dicarboxylate, whereas GABA responses were significantly potentiated by diazepam, pregnenolone, and pentobarbital. CONCLUSION: This preparation provides a satisfactory model for exploring the mechanisms of the SDCN in nociception and antinociception. 相似文献
4.
5.
目的:急性分离大鼠骶髓后连合核神经元.方法:采用酶消化结合机械性分离技术分离神经元,以制霉菌素穿孔膜片箝技术检测其机能状态.结果:分离的神经元对兴奋性和抑制性氨基酸具有良好的反应.P物质(SP)和反式氨基环戊基1,3二羧酸(tACPD)明显增强其NMDA反应.而地西泮,孕烯诺龙和戊巴比妥存在下,GABA反应被显著加强.结论:急性分离的大鼠SDCN神经元为探索SDCN参与痛和镇痛的机制提供了理想模型 相似文献
6.
Dualefectsofpentobarbitalonratsacraldorsalcommissuralneuronsinvitro1PANGZhiPing,XUTianLe2,HUGuoYuan3,LIJiShuo(Departmento... 相似文献
7.
AMPA和KA受体的药理学和生理功能 总被引:1,自引:0,他引:1
谷氨酸受体是脊椎动物中枢神经系统中一类主要的兴奋性神经递质受体,可分为离子型和代谢型两大类。离子型谷氨酸受体(iGluR)是非特异性阳离子通道,包括NMDA、AMPA和海人藻酸(kainate,KA)受体通道(图1),它们在快速兴奋性突触传送中发挥着重要作用。由于NMDA和代谢型谷 相似文献
8.
9.
AIM: To study the effects of pentobarbital (PB) on acutely dissociated rat sacral dorsal commissural neurons (SDCN). METHODS: Nystatin-perforated patch clamp recording was used. RESULTS: (1) At a holding potential of -40 mV, PB induced inward Cl- current (IPB) in a concentration-dependent manner with a EC50 (95% confidence limits) of 416 (385-477) mumol.L-1 and a Hill coefficient of 1.08. (2) Picrotoxin reversibly blocked IPB. (3) The reversal potential of IPB was close to the Cl- equilibrium potential. (4) PB enhanced GABA-induced Cl- influx (IGABA). In the presence of PB 30 mumol.L-1, the EC50 (95% confidence limits) of IGABA decreased from 6.9 (5.4-8.4) mumol.L-1 to 3.5 (2.9-4.1) mumol.L-1. CONCLUSION: PB had dual effects on SDCN, facilitated GABAA receptor-mediated currents and at higher concentrations induced Cl- influx itself. 相似文献
10.