解毒祛瘀滋阴方对强的松治疗的MRL/lpr狼疮鼠肺、脾、腹腔巨噬细胞TLR4信号通路的影响

摘要

[Objective] To observe the effect of Jiedu Quyu Ziyin decoction on TLR4 signaling pathway in macrophages of MRL/lpr lupus mice. [Method] MRL/lpr lupus mice were divided into four groups:model group, prednisone group, Jiedu Quyu Ziyin decoction group(hereinafter referred to as:Chinese medicine group) and prednisone plus Chinese medicine group (hereinafter referred to as:combination of Chinese and western medicine group). The mice were gavaged with saline, prednisone, Jiedu Quyu Ziyin decoction and prednisone added Jiedu Quyu Ziyin decoction for 4 weeks. Macrophages of lung, peritoneal and spleen were collected and the expression of related genes was detected by RT-PCR. [Result] TLR4 mRNA in lung macrophages, and TLR4 protein in splenic macrophages increased significantly(P<0.05) after the treatment of prednisone. The increased TLR4 protein in splenic macrophages was significantly decreased by combining with Jiedu Quyu Ziyin decoction(P<0.05). Prednisone can significantly reduce the TLR4 downstream molecules such as MyD88, IFN-α, iNOS mRNA expression in lung and peritoneal macrophages(P<0.05). The decreased MyD88 mRNA in lung macrophages was increased significantly by combining with Jiedu Quyu Ziyin decoction(P<0.05). [Conclusion] TLR4 signaling pathway is changed in macrophages after glucocorticoid administration in MRL/lpr lupus mice. Jiedu Quyu Ziyin decoction can reduce the abnormal glucocorticoid-induced TLR4 protein expression.%[目的]观察解毒祛瘀滋阴方对MRL/lpr狼疮鼠巨噬细胞TLR4信号通路的影响.[方法]MRL/lpr狼疮鼠分为模型组、强的松组、解毒祛瘀滋阴方组(以下简称:中药组)以及强的松加中药组(以下简称:中西药结合组),分别以生理盐水、强的松、解毒祛瘀滋阴方中药和强的松加解毒祛瘀滋阴方中药灌胃4周,收集肺、腹腔、脾脏巨噬细胞,RT-PCR检测相关基因的表达.[结果]经强的松治疗后狼疮鼠肺巨噬细胞TLR4 mRNA和脾巨噬细胞TLR4蛋白都显著升高(P<0.05),而中西药结合组则可以显著降低升高的脾巨噬细胞TLR4蛋白水平(P<0.05).强的松还可以显著降低肺、腹腔巨噬细胞MyD88、IFN-α、iNOS mRNA等TLR4下游分子的表达(P<0.05),而中西药结合组可以显著升高已经降低的肺巨噬细胞MyD88 mRNA的表达(P<0.05).[结论]MRL/lpr狼疮鼠应用糖皮质激素后,巨噬细胞TLR4信号通路发生改变,解毒祛瘀滋阴方中药可以降低糖皮质激素造成的TLR4蛋白的异常表达.