首页> 外文期刊>Life sciences >ISCHEMIA INCREASES TISSUE AND DECREASES EXTRACELLULAR LEVELS OF ACID DOPAMINE METABOLITES IN THE RAT STRIATUM - FURTHER EVIDENCE FOR ACTIVE TRANSPORT OF METABOLITES
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ISCHEMIA INCREASES TISSUE AND DECREASES EXTRACELLULAR LEVELS OF ACID DOPAMINE METABOLITES IN THE RAT STRIATUM - FURTHER EVIDENCE FOR ACTIVE TRANSPORT OF METABOLITES

机译:缺血增加大鼠纹状体中酸性多巴胺代谢产物的组织和减少胞外水平-代谢物主动转运的进一步证据。

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During 30 minutes of global forebrain ischemia in rats, striatal intracellular levels of dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA) increase at the same time extracellular levels, measure by microdialysis, decrease. If DOPAC and HVA were free to diffuse out of cells, these changes in opposite directions should not occur. These data support the theory that a membrane potential-dependent active transport system is required for DOPAC and HVA to leave striatal cells. During ischemia and subsequent to ATP depletion, neurons and glia depolarize and active transport systems fail. DOPAC and HVA, which are still being produced inside neurons and possibly glia, can not be transported out of these cells and accumulate intracellularly. [References: 23]
机译:在大鼠全脑前缺血30分钟期间,纹状体细胞内二羟基苯基乙酸(DOPAC)和高香草酸(HVA)的水平同时升高,而细胞外水平(通过微透析测量)降低。如果DOPAC和HVA可以自由扩散出细胞,则不应发生相反方向的这些变化。这些数据支持以下理论:DOPAC和HVA离开纹状体细胞需要依赖膜电位的主动转运系统。在缺血期间以及ATP耗竭后,神经元和神经胶质细胞会去极化,主动转运系统会失效。仍在神经元和神经胶质内产生的DOPAC和HVA不能从这些细胞中转运出来并在细胞内积累。 [参考:23]

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