硫化氢抑制糖酵解调控小胶质细胞对帕金森抑郁保护机制的研究
摘要
而改善帕金森病抑郁的作用机制。方法:将培养的 BV2 小胶质细胞随机分为 4 组:对照组(Sham 组)、脂多糖组(LPS 组)、
LPS+ 硫氢化钠组(NaHS 组)、LPS+ 生理盐水组(NS 组)。选取 60 只 SPF 级大鼠,随机分为对照组(Sham 组)、PD+
皮质酮组(模型组)、PD+ 皮质酮 +NaHS(NaHS 组)、PD+ 皮质酮 +NS(NS 组),每组 5-10 只,其中对照组 15 只,
其余 45 只用于建立帕金森病合并抑郁大鼠模型。NS 组注射生理盐水,NaHS 组注射 NaHS。通过 Western-blot 检测各组
PDC、PDK2 的表达水平,用乳酸试剂盒测定乳酸浓度,采用免疫荧光技术分析 CD68 的表达水平,并利用 RT-qPCR 技
术检测小胶质细胞炎症因子肿瘤坏死因子 -α(TNF-α)、诱导型一氧化氮合酶(iNOS)及白细胞介素 -10(IL-10)的
释放情况。动物实验中,通过旷场实验和高架十字迷宫来检测 NaHS 对帕金森病合并抑郁的影响。结果:体外实验结果表明,
与 LPS 组和 NS 组相比,NaHS 组显著降低了 PDK2 的表达,同时提高了 PDC 的表达,并减少乳酸浓度;此外,NaHS 组
的 CD68 平均荧光强度低于 LPS 组和 NS 组,且该组细胞中 iNOS、TNF-α 水平下降,IL-10 水平上升。动物实验结果显示,
与模型组相比,NaHS 组组织中的 iNOS、TNF-α 水平降低,而 IL-10 水平升高。在旷场实验中,NaHS 组小鼠进入中心
区域的次数和停留时间均增加;十字迷宫实验结果表明,NaHS 组小鼠在开放区域的进入次数和停留时间也有所增加。结论:
H2S 通过抑制糖酵解促进小胶质细胞向 M2 型极化,从而缓解帕金森病合并抑郁的症状。
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