›› 2000, Vol. 43 ›› Issue (3): 248-254.

• 研究论文 • 上一篇    下一篇

溴氰菊酯对神经细胞钙通道和 钙库的激活作用

郭朕群, 贺秉军, 高永闯 , 孙金生, 刘安西   

  • 出版日期:2000-08-20 发布日期:2000-08-20

Active effect of deltamethrin on calcium channels and calcium store of culture neurons

GUO Zhen-qun, HE Bing-jun, GAO Yong-chuang, SUN Jin-sheng, LIU An-xi   

  • Online:2000-08-20 Published:2000-08-20

摘要: 应用膜片钳全细胞记录方式和显微荧光测钙技术,以MN9D神经细胞为材料研究了溴氰菊酯的作用机理。低浓度(10-9 mol/L~10-7 mol/L)溴氰菊酯就能使神经细胞Ca2+电流显著增加。10-9 mol/L,1 min时电流增加平均值为20.64%,5 min时为15.48%,表明溴氰菊酯能激活高电位激活钙通道(L型和N型),促使Ca2+内流,显微荧光测定细胞内自由钙离子浓度([Ca2+I)发现,在含Ca2+和无Ca2+的胞外液中,溴氰菊酯均能使胞内自由钙离子数量增加,表明它能刺激胞内钙库释放Ca2+。[Ca2+I升高对细胞功能影响很大。

关键词: 溴氰菊酯, 全细胞钳位, Ca2+通道电流, [Ca2+]I

Abstract: he effect of pyrethroid insecticide deltamethrin on mesencephalic originated dopaminergic cell line MN9D was investigated by using the patchclamp and Fura-2 microfluorimetric techniques.Whole cell calcium current recordings showed: deltamethrin activated calcium channels (H-VOCs) and increased the amplitude of calcium currents greatly by about 20.64% in 1 min and 15.48% in 5 min at very low concentration (10-9 mol/L).Deltamethrin could increase the [Ca2+]I in both normal and calciumfree bath solutions. This indicates deltamethrin could stimulate the calcium store to release the cytosolic free Ca2+. We conclude deltamethrin stimulates [Ca2+]I entry through the calcium channels and release of Ca2+ from intracellular store. Prolonged elevation of [Ca2+]I will affect many cellular process and cause cytotoxic to the cells.

Key words: deltamethrin, wholecell clamp, HVOCs, [Ca2+]I