J Mol Neurosci:罂粟碱抑制LPS诱导的视网膜小胶质细胞的激活

2019-05-31 不详 网络

郑州市东建设路郑州大学第一附属医院眼科的Zhou T等人近日在J Mol Neurosci杂志上发表了一篇研究论文,他们发现罂粟碱可以抑制LPS诱导的视网膜小胶质细胞的激活。

郑州市东建设路郑州大学第一附属医院眼科的Zhou T等人近日在J Mol Neurosci杂志上发表了一篇研究论文,他们发现罂粟碱可以抑制LPS诱导的视网膜小胶质细胞的激活。

研究表明,罂粟碱可以抑制脂多糖(LPS)诱导的小胶质细胞激活。分离纯化新生SD大鼠视网膜原代小胶质细胞,建立LPS诱导的小胶质细胞激活模型。

他们通过蛋白质印迹实验检测信号传导途径的蛋白质磷酸化水平。通过RT-PCR和ELISA分别检测TNF-α、IL-1β和IL-10的转录和表达水平,观察原代小胶质细胞的异常激活情况。分别加入cAMP抑制剂Rp-异构体、PKA抑制剂H89和MEK抑制剂U0126以进一步研究MEK / Erk在PAP抑制原代小胶质细胞活化中的作用以及cAMP/PKA和MEK/Erk之间的关系。

结果发现LPS刺激后MEK磷酸化水平上调,10μg/ ml罂粟碱可阻断MEK磷酸化水平。10μM U0126可显着抑制TNF-α和IL-1β,增加IL-10在视网膜小胶质细胞中的转录和表达(P <0.01)。 Rp-异构体和H89均能上调MEK和Erk的磷酸化水平。

因此,他们认为,罂粟碱可通过cAMP/PKA和MEK/Erk途径抑制炎症因子并促进抗炎因子的表达,从而抑制LPS诱导的原发性视网膜小胶质细胞的活化,并且MEK/Erk途径可能受cAMP/PKA的部分调节。这为其保护中枢神经系统提供了理论依据和实验依据。

原文出处:

Zhou, T. and Y. Zhu, Cascade Signals of Papaverine Inhibiting LPS-Induced Retinal Microglial Activation. J Mol Neurosci, 2019.

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    2019-06-02 zutt
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    2019-06-02 lsndxfj
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