摘要
TFP(10-100μmol/L)可引起裂殖酵母(Schizosaccharomyces pombe)胞外Ca2+内流,TFP浓度不同,促进Ca2+内流程度也不一样,50μmol/LTFP的促进作用最大。并且TFP浓度越大,Ca2+内流出现峰值也越早,10、20、50、100μmol/LTFP处理后,胞内总钙出现峰值时间分别为45、45、30、15分钟。胞外H+浓度也会对TFP引起的Ca2+内流产生不同影响,缓冲液的pH值为6.0时最有利于TFP引起胞内Ca2+含量增加,碱性条件下TFP的效果最不明显。由TFP引起的Ca2+内流增加要比单一地增加外钙浓度效果好得多,TFP在10μmol/L浓度的外钙条件下引起的胞内钙含量数值比1000μmol/L的外钙条件而无TFPT所引起的胞内钙含量还要高53.9%。缓冲液中加入0.8%的钙离子通道阻断剂LaC13或溶液中无葡萄糖的存在,TFP的促进作用消失,说明TFP促进Ca2+内流是通过钙离子通道来完成的并需要能量参与。
Trifluoperazine(10-100mol/L) induced Ca2+ influx into Schizosaccharomyces pombe cells andthe effect of stimulation was doze-depedent,in which 50μmol / L TFP had the most appent effecL With theconcentration of TFP increasing, the peak of Ca2 + influx would appeared earlier. By adding 10, 20. 50. 100umol /L TFP respechvely, the peak appeared at the bine of 45.45, 30. 15adn later. The effect of shmulahon inducedby TFP was better than addition exogenous Ca2+ alone, suggesting that TFP and exogenous Ca2+ had thecooperahve effect. The stimulation induced by TFP was observed only in the presence of metabolic substrate andwas completely iambited by 0.8% LaCI3 The results indicated that the shmulation of Ca2+ influx wasenergy-depedent carrier-mediated process.
出处
《菌物系统》
CAS
CSCD
北大核心
2000年第1期97-101,共5页
Mycosystema
基金
江苏省自然科学基金