重楼总皂苷对多发骨折-脂多糖两次打击模型大鼠血清细胞因子水平的影响

目的：探讨重楼总皂苷（RPTS）对多发骨折-脂多糖两次打击模型大鼠血清TNF-α、IL-1β及IL-6水平的影响。方法：68只Wistar大鼠随机分成5组,除空白对照组外,其余各组按多发骨折-脂多糖两次打击模型标准制模。制模成功后1h,除空白对照组和模型对照组外各组予以不同浓度的RPTS灌胃,干预后6h采血,以ELISA法检测血清中TNF-α、IL-1β及IL-6浓度。结果：大鼠血清TNF-α、IL-1β及IL-6浓度,模型对照组与空白对照组相比较明显升高（P〈0.001）,而RPTS各干预组与模型对照组相比较却明显下降（P〈0.001）,差异均有统计学意义。结论：重楼总皂苷可以降低多发骨折-脂多糖两次打击模型大鼠血清中的TNF-α、IL-1β及IL-6水平。     

重楼对多发性创伤大鼠的保护作用

目的探讨重楼总皂苷(RPTS)对多发性创伤模型大鼠的保护作用。方法将70只Wistar大鼠随机分成3组,除空白对照组外,其余2组按多发骨折-脂多糖两次打击致多发性创伤并急性肺损伤动物模型标准制模,制模后1h,重楼干预组予重楼总皂苷(RPTS)灌胃。干预后6h,部分动物采血,以ELISA法检测血清中TNF-α、IL-1β及IL-6浓度;各组留取肺组织,光镜下进行病理形态观察。剩余动物用以观察死亡率。结果重楼干预组大鼠血清TNF-α、IL-1β及IL-6浓度显著低于模型对照组(P<0.001)。模型对照组,光镜下肺组织病理形态观察显示明显肺损伤;而重楼干预组肺损伤表现明显轻于模型对照组。死亡率,重楼干预组显著低于模型对照组(P<0.05)。结论重楼总皂苷对多发性创伤大鼠具有保护作用,机制可能与下调血清中的TNF-α、IL-1β、IL-6水平从而减轻炎症反应以及减轻急性肺损伤有关。     

IL-17A promotes microglial activation and neuroinflammation in mouse models of intracerebral haemorrhage

Microglial activation is an important contributor to neuroinflammation in intracerebral haemorrhage (ICH). IL-17A has been demonstrated to be involved in neuroinflammatory diseases such as multiple sclerosis. However, the exact mechanism of IL-17A mediated microglial activation in ICH has not been well identified. The purpose of this experiment is to investigate the role of IL-17A in ICH induced microglial activation and neuroinflammation. ICH mice were made by injection of autologous blood model. IL-17A expression and inflammatory factors in perihematomal region, and neurological function of mice were examined after ICH. In addition, IL-17A-neutralizing antibody was utilized to potentially prevent microglial activation and neuroinflammation in ICH mice. The expression of IL-17A, inflammatory factors and microglial activation in perihematomal region were significantly increased, and neurological function of mice was impaired after ICH. In addition, IL-17A Ab prevented ICH-induced cytokine expression, including TNF-α, IL-1β and IL-6, and downstream signaling molecules, including MyD88, TRIF, IκBα, and NF-κBp65 expression, and attenuated microglial activation. IL-17A Ab significantly reduced brain water content and improved neurological function of ICH mice. In conclusion, our results demonstrated that IL-17A was involved in ICH-induced microglial activation and neuroinflammation. IL-17A Ab might also provide a promising therapeutic strategy in ICH.