【摘要】 目的探讨淫羊藿苷对脑死亡大鼠肾损伤的保护作用及其作用机制。方法 30只SD大鼠被随机分为3组,每组各10只,分别为脑死亡组、治疗组和假手术组。脑死亡组大鼠在诱导脑死亡后不接受任何治疗;治疗组大鼠在诱导脑死亡后腹腔注射淫羊藿苷,剂量为100 mg/kg;假手术组保持颅内压正常并在麻醉状态下接受机械通气6 h。脑死亡组和治疗组分别在诱导脑死亡6 h后处死大鼠,假手术组在机械通气6 h后处死大鼠,分别取血清和肾组织进行检测。计量资料以均数±标准差(x±s)表示,采用单因素方差分析比较3组大鼠血清肌酐、尿素氮、Paller评分、CD68+巨噬细胞计数、促炎因子(IL-1β、IL-6、TNF-α)及趋化因子(MCP-1、IP-10)的转录水平,组间两两比较采用LSD法。P<0.05为差异有统计学意义。结果淫羊藿苷治疗组脑死亡大鼠血清尿素氮和血清肌酐水平明显降低,分别为(10.0±1.5)、(92±12)mmol/L,与其他两组比较差异均有统计学意义(P均<0.05);组织病理学示肾小管损伤评分明显降低,透射电镜示线粒体和内质网损伤减轻。淫羊藿苷可明显降低脑死亡大鼠肾组织内促炎因子(IL-1β、IL-6、TNF-α)和趋化因子(MCP-1、IP-10)的转录水平及CD68+巨噬细胞浸润,并明显降低c-Jun氨基末端激酶、p38丝裂原活化蛋白激酶和信号传导与转录激活因子3蛋白质磷酸化水平。结论淫羊藿苷能减轻脑死亡大鼠肾损伤,保护肾功能,可能通过抑制炎性反应和SAPK、JAK-STAT信号通路发挥作用。更多还原

【Abstract】 Objective To investigate the protective effect of icariin on brain-death induced kidney injury in rats and its mechanisms. Methods Thirty SD rats were randomly divided into three groups,including sham group,control group(brain death) and experiment group(brain death with icariin treatment). Icariin was intraperitoneally given at the dose of 100 mg/kg right after brain death.Sham group were anaesthetized and treated with mechanical ventilation for 6 hours at the condition of normal intracranial pressure. The rats in control group and experiment group were sacrificed 6 hours after brain death and rats in sham group were sacrificed 6 hours after mechanical ventilation,and peripheral blood and kidneys were collected and detected. Measurement data was represented as(x ± s).One-way analysis of variance was used to compare serum creatinine,urea nitrogen,Paller score,CD68+macrophage count and transcriptional levels of proinflammatory factors(IL-1β,IL-6,TNF-α)and chemokines(MCP-1,IP-10) among the 3 groups,least significant difference method was used to compare the above indexes between any two groups,difference was statistically significant when P < 0. 05.Results The levels of serum urine nitrogen and creatinine in experiment group were(10. 0 ± 1. 5) and(92 ± 12) mmol/L,respectively,which were significantly lower than control group and higher than sham group(P all < 0. 05). Icariin decreased the paller scores of tubular injury and alleviated mitochondria and endoplasmic reticulum injury. Icariin significantly decreased the mRNA levels of proinflammatory factors(IL-1β,IL-6,TNF-α) and chemokines(MCP-1,IP-10),infiltration degree of macrophages,and phosphorylation levels of JNK,p38-MAPK and STAT3 in kidney tissues of experiment group. Conclusions Icariin protects renal function by alleviation of brain-death induced kidney injury,which might by inhibition of inflammation and SAPK and JAK-STAT signal pathways.更多还原