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Combining the lack of chromogranins with chronic L-DOPA treatment affects motor activity in mice

机译:结合缺乏慢性L-DOPA治疗的缺乏染色体会影响小鼠的运动活性

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摘要

We have tested whether the lack of chromogranins (Cgs) A and B could provoke CNS disorders when combined with an excess of dopamine. We chronically treated (over 6 months) mice lacking both chromogranins A and B (Cgs-KO) with a low oral dosage of L-DOPA/benserazide (10/2.5 mg/kg). Motor performance in the rota-rod test, open field activity, and metabolic cages indicated a progressive impairment in motor coordination in these mice, and an increase in rearing behavior, which was accompanied by an increase in DA within the substantia nigra. We conclude that mild chronic L-DOPA treatment does not produce nigro-striatal toxicity that could be associated with parkinsonism, neither in control nor Cgs-KO mice. Rather, Cgs-KO mice exhibit behaviors compatible with an amphetamine-like effect, probably caused by the excess of catecholamines in the CNS.
机译:我们测试了缺乏染色体(CGS)A和B是否可以在与过量的多巴胺结合时引起CNS疾病。 我们慢性治疗(超过6个月)小鼠,缺乏染色体A和B(CGS-KO)的小鼠,具有低口服剂量的L-DOPA / BENCERAZIDE(10 / 2.5mg / kg)。 在Rota-Rod测试中的电动机性能,开放的场活动和代谢笼表明了这些小鼠的电机协调的逐步损害,以及饲养行为的增加,伴随着基础内的DA增加。 我们得出结论,轻度慢性L-DOPA治疗不会产生与帕金森主义无关的硝基纹毒性,既不是对照也不是CGS-Ko小鼠。 相反,CGS-KO小鼠表现出与类似疗法的效果相容的行为,可能是由CNS中的过量的儿茶酚胺引起的。

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