首页> 外文期刊>Neuroscience Letters: An International Multidisciplinary Journal Devoted to the Rapid Publication of Basic Research in the Brain Sciences >Potential mechanisms of neuroprotection induced by low dose total-body gamma-irradiation in C57 mice administered with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP).
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Potential mechanisms of neuroprotection induced by low dose total-body gamma-irradiation in C57 mice administered with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP).

机译:低剂量全身γ射线辐照在给予1-甲基-4-苯基-1,2,3,6-四氢吡啶(MPTP)的C57小鼠中诱导神经保护的潜在机制。

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摘要

Low dose total-body gamma-irradiation (TBI) was reported to confer neuroprotection against MPTP-induced dopaminergic neurotoxicity. After being pretreated with a single low dose (0.5Gy, 2.0Gy or 3.5Gy) TBI, C57BL/6 mice were administered with MPTP (15mg/kg, four times, 2h apart) intraperitoneally (i.p.). In the group pretreated with 2.0Gy TBI, with lower lymphocytes number, neuroprotection was found by High Performance Liquid Chromatography (HPLC) determination of the striatal dopamine. Contrarily, in the group pretreated with 0.5Gy TBI, with higher lymphocytes number, dopaminergic neuron toxicity was enhanced. So it was probably the decrease of lymphocytes, not the radiation hormesis that rendered the potential neuroprotection. And it was the balance between radiation injury and lymphocytopenia neuroprotection that decided the effect of low dose gamma-irradiation on MPTP-induced dopaminergic neurotoxicity.
机译:据报道,低剂量全身γ射线照射(TBI)赋予了针对MPTP诱发的多巴胺能神经毒性的神经保护作用。用单一低剂量(0.5Gy,2.0Gy或3.5Gy)TBI预处理后,对C57BL / 6小鼠腹膜内(i.p.)给予MPTP(15mg / kg,四次,间隔2小时)。在用2.0Gy TBI预处理的组中,淋巴细胞数量较少,通过高效液相色谱(HPLC)测定纹状体多巴胺可发现神经保护作用。相反,在用0.5Gy TBI预处理的组中,淋巴细胞数量更高,多巴胺能神经元毒性增强。因此,潜在的神经保护作用可能是淋巴细胞的减少而不是辐射的兴奋性降低。辐射损伤与淋巴细胞减少神经保护之间的平衡决定了低剂量γ辐射对MPTP引起的多巴胺能神经毒性的影响。

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