2,3-二甲基-2-丁胺新衍生物对脑神经细胞钾通道的影响  

Effects of 2,3-dimethyl-2-butylamine derivatives on potassium channels in cultured cortical neurons from rats

作　　者：崔文玉[1] 陈玉萍[1] 汪海[1] 

机构地区：[1]军事医学科学院毒物药物研究所,北京100850

出　　处：《中国药理学通报》2005年第2期153-157,共5页Chinese Pharmacological Bulletin

基　　金：国家"863"计划重大专项基金资助项目(No2002AA2Z3137)

摘　　要：目的　研究 2, 3 二甲基 2 丁胺衍生物对大脑皮层神经细胞钾通道的影响。方法　在原代培养的新生大鼠大脑皮层神经元细胞上,用细胞膜片钳全细胞记录技术,评价新衍生物对神经元IA及IK电流的影响。结果　在评价的 9个新化合物中,化合物(5) (6) (7) (9)不影响皮层神经元细胞上钾通道的活性, 化合物 ( 4 ) ( 8 )能降低皮层神经元IK电流, 这 6个化合物均可激活血管平滑肌钾通道; 另一方面,其余 3个化合物对血管平滑肌钾通道功能无明显影响,但其中的化合物 (3)可降低神经元上的IK电流。结论　2, 3 二甲基 2 丁胺衍生物对脑神经细胞上钾通道的作用不同于其在血管平滑肌上钾通道的作用特点。Aim To investigate the effects of newly synthesized 2, 3-dimethyl-2-butylamine derivatives on potassium channels in cortical neurons from rats.Method On cultured cortical neurons, the influences of those novel compounds on I A and I K currents were evaluated using whole-cell patch clamp technique. Result On cortical neurons, these compounds (5),(6),(7),(9) showed no effects on outward potassium currents, while the compounds (4),(8) exhibited inhibition of I K currents. But on a rterial smooth muscle cells(SMCs), all the six compounds had potassium channels opening activities. While the other three compounds had no effects on potassium channels of SMCs, the compound (3) decreased the I K currents evoked on neu rons.Conclusion The novel 2,3-dimethyl-2-butylamine derivati ves had the different modulation of potassium channels on cortical neurons as SM Cs.

关 键 词：2 3-二甲基-2-丁胺衍生物 钾通道 皮层神经元 膜片钳 

分 类 号：R-332[医药卫生] R322.81