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首页> 外文期刊>Acta Pharmacologica Sinica >(-)-Stepholidine enhances K+ depolarization-induced activation of synaptosomal tyrosine 3-monooxygenase from rat striatum
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(-)-Stepholidine enhances K+ depolarization-induced activation of synaptosomal tyrosine 3-monooxygenase from rat striatum

机译:(-)-Stepholidine增强大鼠纹状体中K +去极化诱导的突触体酪氨酸3-单加氧酶的活化

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AIM: To study the mechanism of K~+ depo- larization-induced activation of synaptosomal tyrosine 3-monooxygenase (TM) in rat striatum and the effect of (-)-stepholidine (SPD) on this activation. METHODS: The TM was assayed for DOPA by HPLC-ECD; the activities of Ca~2+/ calmodulin (CaM)-dependent protein kinase (PK II) and Ca~2+/phosphoinositide-dependent protein kinase (PKC) were assayed using histidine as substrate. RESULTS: The incubation of striatal synaptosomes in K~+ -riched (60 mmol·L~-1) medium resulted in a marked activation of TM. PKC inhibitor polymyxin B (PMB) completely blocked the activation of K~+ 60 mmol-·L~-1 on TM.
机译:目的:研究K〜+去极化诱导大鼠纹状体酪氨酸3-单加氧酶(TM)活化的机制,以及(-)-stepholidine(SPD)对此活化的影响。方法:用HPLC-ECD法测定TM的DOPA。以组氨酸为底物测定Ca〜2 + /钙调蛋白(CaM)依赖性蛋白激酶(PK II)和Ca〜2 + /磷酸肌醇依赖性蛋白激酶(PKC)的活性。结果:纹状体突触小体在富含钾离子(60mmol·L〜-1)的培养基中孵育,导致TM明显活化。 PKC抑制剂多粘菌素B(PMB)完全阻断了TM上K〜+ 60 mmol-·L〜-1的活化。

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