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二甲基-氨氯吡咪和牛黄酸对大鼠心室肌细胞Na^+/Ca^(2+)交换电流的影响 被引量:2

Effects of 5-(N,N-dimethyl)-amiloride (DMA) and taurine on Na +/Ca ^(2+ ) exchange current in rat ventricular myocytes
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摘要 利用全细胞膜片钳技术 ,采用胶原酶B急性分离的大鼠心室肌细胞 ,研究了牛黄酸和二甲基 -氨氯吡咪对心肌细胞膜Na+/Ca2 +交换电流的影响。结果表明 ,10 μmol,2 0 μmol和 4 0 μmol的二甲基 -氨氯吡咪可使Ni2 +敏感电流浓度依赖性地增加 ;膜电位为 +5 0mV时分别增加 ( 2 7± 7) % ,( 12 1± 4 3 ) % ,和 ( 173± 68) % ;膜电位为 - 10 0mV时分别增加 ( 110±5 2 ) % ,( 2 2 1± 88) %和 ( 2 81± 80 ) %。牛黄酸对Na+/Ca2 Using the whole cell patch-clamp technique to study effects of taurine and 5-(N,N-dimethyl)-amiloride (DMA) on Na +/Ca 2+ exchange current in rat ventricular myocytes. The results showed that at membrane potential of +50 mV and -100 mV, DMA 10 μmol, 20 μmol and 40 μmol increased the Ni 2+ -sensitive current by (27±7)%,(121±43)%,(173±68)%;and (110±52)%,(221±88)%,(281±80)%,respectively.DMA increases the Na +/Ca 2+ exchange current in a dose-dependent manner while taurine has no effect on Na +/Ca 2+ exchange current.
出处 《山西医科大学学报》 CAS 2000年第1期1-3,共3页 Journal of Shanxi Medical University
基金 山西省自然科学基金!资助课题 (971 0 51 )
关键词 二甲基 氨氯吡咪 牛黄酸 心肌细胞 N,N-dimethy1)-amiloride taurine patch clamp technique myocardium Na +/Ca 2+ exchange current
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