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首页> 外文期刊>Journal of pharmacological sciences. >Effects of subchronic treatment with selegiline on L-DOPA-induced increase in extracellular dopamine level in rat striatum.
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Effects of subchronic treatment with selegiline on L-DOPA-induced increase in extracellular dopamine level in rat striatum.

机译:司来吉兰亚慢性治疗对L-DOPA诱导的大鼠纹状体细胞外多巴胺水平升高的影响。

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Selegiline is used an adjunct to L-DOPA therapy. We investigated extracellular striatal dopamine (DA) level in awake rats treated with L-DOPA and/or selegiline using a microdialysis method. Rats given 10 mg/kg, i.p. per day selegiline for 7 days were administered with a single dose of 100 mg/kg, i.p. L-DOPA 0 (3 h), 1, 3, 7, 14, 21, or 28 days after the last selegiline treatment. Carbidopa was administered 0.5 h before L-DOPA administration. The significant increase in basal DA level before L-DOPA treatment persisted until 1 day after the last selegiline treatment, and the significant decrease in basal DOPAC level persisted for more than 28 days. Thus, selegiline affected DA catabolism for more than 28 days. Total monoamine oxidase (MAO) and MAO-B activities at day 0 decreased by 22% and 5.7%, respectively. The significant enhancement of L-DOPA-induced increase in DA level was observed until 3 days after the last selegiline treatment. Next, the effects of reducing L-DOPA dose by 25% were examined 3 h after the last selegiline treatment. A dose-dependent decrease in DA level was observed, indicating that DA level in selegiline-treated rats can be controlled by L-DOPA dose.
机译:司来吉兰是L-DOPA治疗的辅助药物。我们使用微透析方法研究了用L-DOPA和/或司来吉兰治疗的清醒大鼠的细胞外纹状体多巴胺(DA)水平。大鼠以10 mg / kg腹腔注射每天服用司来吉兰7天,单次剂量为100 mg / kg。最后一次司来吉兰治疗后0、3、7、14、21或28天服用L-DOPA。卡比多巴在L-DOPA给药前0.5小时给药。 L-DOPA治疗前基础DA水平的显着升高持续到最后的司来吉兰治疗后1天,而基础DOPAC水平显着降低持续28天以上。因此,司来吉兰影响DA的分解代谢超过28天。在第0天,总单胺氧化酶(MAO)和MAO-B活性分别下降了22%和5.7%。观察到L-DOPA诱导的DA水平的显着增强,直到最后一次司来吉兰治疗后3天。接下来,在最后的司来吉兰治疗后3小时检查了将L-DOPA剂量降低25%的效果。观察到DA水平的剂量依赖性降低,表明司来吉兰治疗的大鼠中的DA水平可以通过L-DOPA剂量控制。

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