期 刊 :中国中药杂志 1996年 21卷 01期 页码:42.
关键词:问荆碱;脑囊泡;Mg2+-ATPase;Ca2+-ATPase;抑制作用;
Keywords:Palustrine, synaptic vesicle membrane, Mg2+-ATPase, Ca2+-ATPase, inhibition,
摘 要 :问荆碱对大鼠脑囊泡膜Mg2+-ATPase,Ca2+-ATPase有显著的抑制作用,对Mg2+-ATPase的抑制机制分别为竞争性抑制(Mg2+,Ki=4.93×10-5mol/L)、非竞争性抑制(ATP,Ki=1.06×10-4mol/L),对Ca2+-ATPase的抑制机制分别为混合型抑制(Ca2+,Ki=5.07×10-5mol/L)、非竞争性抑制(ATP,Ki=3.27×10-4mol/L)。
Abstract:Palustrine markedly inhibits Mg2+- ATPase and Ca2+-ATPase of brain synaptic vesicle membrane inrats,the inhibiting mechanism on Mg2+-ATPase being competitive(Mg2+,Ki=4.93 ×10-5mol/L)and non-competi-tive(ATP,Ki=1.06×10-4 mol/L)respectively,and on Ca2+-ATP-ase mixed inhibition (Ca~(2+),Ki = 5.07×10-5mol/L)and non-competitive(ATP,Ki=3.27 ×10-4mol/L)respectively.