目的：通过研究尿酸性肾病动物模型中白介素-1（IL-1）β和白介素-1受体相关激酶4（IRAK-4）表达的意义,了解IL-1β信号通路在尿酸性肾病中的作用。方法：Wistar大鼠54只随机分为高尿酸血症组30只、正常组24只,制备尿酸性肾病大鼠模型,...目的：通过研究尿酸性肾病动物模型中白介素-1（IL-1）β和白介素-1受体相关激酶4（IRAK-4）表达的意义,了解IL-1β信号通路在尿酸性肾病中的作用。方法：Wistar大鼠54只随机分为高尿酸血症组30只、正常组24只,制备尿酸性肾病大鼠模型,检测尿酸（UA）、尿素氮（BUN）、肌酐（CR）及肌酐清除率（Ccr）、24 h尿微量白蛋白（m A1b）;取肾脏组织行HE染色,观察形态学变化;免疫组化测定IL-1β的表达;荧光定量PCR检测IRAK-4 m RNA的水平。结果：高尿酸组2、4、6周时IL-1β的表达均增加,免疫组化评分（IHS）均明显升高（P〈0.01）;高尿酸血症组较正常组IRAK-4 m RNA在2、4、6周时均出现表达上调,4~6周IRAK-4 m RNA表达明显增加,与正常组比较有显著性差异（P〈0.01）。结论：IL-1β、IRAK-4参与了尿酸性肾病炎症反应的过程,可能为尿酸性肾病治疗提供新的可能。展开更多
Objective： To test whether IL-1 RI/My088-TIR mimic AS-1 can work as a new compound that targeted at blocking MyD88- dependent signaling pathway, we investigated the physical structure and biological function of AS-1....Objective： To test whether IL-1 RI/My088-TIR mimic AS-1 can work as a new compound that targeted at blocking MyD88- dependent signaling pathway, we investigated the physical structure and biological function of AS-1. Methods：The crystallographic structure of AS-1 was examined by 1^H nuclear magnetic resonance. The toxicity of AS-1 was measured with Methyl thiazolyl tetrazolium （MTT） assay. The effect of AS-1 on phosphorylation state of p38 MAPK and IRAK-1 was observed with Western blot. Results：The crystallographic details of AS-1 demonstrated that it was a tri-peptide sequence[（F/Y）-（V/L/I）-（P/G）] of the IL-1R I -TIR domain BBloop. No toxicity of AS-1 was shown to HEK 293A cells. The phosphorylation of p38 MAPK, induced by IL-1β significantly increased from those in the control group. AS-1 significantly reduced the phosphorylation of p38 MAPK induced by IL-1β. IL-1β increased the phosphorylation of IRAK-1 significantly, which was prevented by AS-1. Conclusion：AS-1 is a competitive mimic between IL-1R I-TIR and MyD88-TIR domain, which most likely interferes with MyD88-dependent signaling pathway.展开更多
目的研究急性脑出血大鼠肝组织中IRAK-M表达的变化,并探讨涤痰通瘀方剂对急性脑出血大鼠肝损害的干预作用。方法通过建立SD大鼠急性脑出血模型,并随机分为中药组(酒大黄、胆南星、石菖蒲、蒲黄、三七、水蛭)、脑出血组、假手术组、正常...目的研究急性脑出血大鼠肝组织中IRAK-M表达的变化,并探讨涤痰通瘀方剂对急性脑出血大鼠肝损害的干预作用。方法通过建立SD大鼠急性脑出血模型,并随机分为中药组(酒大黄、胆南星、石菖蒲、蒲黄、三七、水蛭)、脑出血组、假手术组、正常组,每组分为24、48、72 h 3个时间亚组,检测每组肝脏组织IRAKM蛋白表达水平及肝组织肿瘤坏死因子-α(TNF-α)水平,并观察肝组织HE染色结果。结果脑出血模型组在造模后各个时间点IRAK-M蛋白表达水平较假手术组及正常组均明显降低(P<0.05);中药治疗组的IRAKM蛋白表达水平较脑出血模型组明显升高(P<0.05),与假手术组、正常组相比略有降低;中药治疗组及脑出血模型组肝脏IRAK-M蛋白表达水平与组织TNF-α水平呈负相关。结论 IRAK-M蛋白表达水平升高可能是抑制脑出血后诱发的LPS胞内信号转导炎性级联反应的重要因素;涤痰通瘀方剂可加强IRAK-M激酶活性,从而抑制炎症因子的释放,减轻急性脑出血大鼠肝脏损伤的程度。展开更多
文摘目的：通过研究尿酸性肾病动物模型中白介素-1（IL-1）β和白介素-1受体相关激酶4（IRAK-4）表达的意义,了解IL-1β信号通路在尿酸性肾病中的作用。方法：Wistar大鼠54只随机分为高尿酸血症组30只、正常组24只,制备尿酸性肾病大鼠模型,检测尿酸（UA）、尿素氮（BUN）、肌酐（CR）及肌酐清除率（Ccr）、24 h尿微量白蛋白（m A1b）;取肾脏组织行HE染色,观察形态学变化;免疫组化测定IL-1β的表达;荧光定量PCR检测IRAK-4 m RNA的水平。结果：高尿酸组2、4、6周时IL-1β的表达均增加,免疫组化评分（IHS）均明显升高（P〈0.01）;高尿酸血症组较正常组IRAK-4 m RNA在2、4、6周时均出现表达上调,4~6周IRAK-4 m RNA表达明显增加,与正常组比较有显著性差异（P〈0.01）。结论：IL-1β、IRAK-4参与了尿酸性肾病炎症反应的过程,可能为尿酸性肾病治疗提供新的可能。
基金This study was supported by the National Natural Science Foundation of China(No.30571842)
文摘Objective： To test whether IL-1 RI/My088-TIR mimic AS-1 can work as a new compound that targeted at blocking MyD88- dependent signaling pathway, we investigated the physical structure and biological function of AS-1. Methods：The crystallographic structure of AS-1 was examined by 1^H nuclear magnetic resonance. The toxicity of AS-1 was measured with Methyl thiazolyl tetrazolium （MTT） assay. The effect of AS-1 on phosphorylation state of p38 MAPK and IRAK-1 was observed with Western blot. Results：The crystallographic details of AS-1 demonstrated that it was a tri-peptide sequence[（F/Y）-（V/L/I）-（P/G）] of the IL-1R I -TIR domain BBloop. No toxicity of AS-1 was shown to HEK 293A cells. The phosphorylation of p38 MAPK, induced by IL-1β significantly increased from those in the control group. AS-1 significantly reduced the phosphorylation of p38 MAPK induced by IL-1β. IL-1β increased the phosphorylation of IRAK-1 significantly, which was prevented by AS-1. Conclusion：AS-1 is a competitive mimic between IL-1R I-TIR and MyD88-TIR domain, which most likely interferes with MyD88-dependent signaling pathway.
文摘目的研究急性脑出血大鼠肝组织中IRAK-M表达的变化,并探讨涤痰通瘀方剂对急性脑出血大鼠肝损害的干预作用。方法通过建立SD大鼠急性脑出血模型,并随机分为中药组(酒大黄、胆南星、石菖蒲、蒲黄、三七、水蛭)、脑出血组、假手术组、正常组,每组分为24、48、72 h 3个时间亚组,检测每组肝脏组织IRAKM蛋白表达水平及肝组织肿瘤坏死因子-α(TNF-α)水平,并观察肝组织HE染色结果。结果脑出血模型组在造模后各个时间点IRAK-M蛋白表达水平较假手术组及正常组均明显降低(P<0.05);中药治疗组的IRAKM蛋白表达水平较脑出血模型组明显升高(P<0.05),与假手术组、正常组相比略有降低;中药治疗组及脑出血模型组肝脏IRAK-M蛋白表达水平与组织TNF-α水平呈负相关。结论 IRAK-M蛋白表达水平升高可能是抑制脑出血后诱发的LPS胞内信号转导炎性级联反应的重要因素;涤痰通瘀方剂可加强IRAK-M激酶活性,从而抑制炎症因子的释放,减轻急性脑出血大鼠肝脏损伤的程度。
