芍药苷通过JNK/NEK7/NLRP3通路缓解脓毒症相关急性肾损伤  

Paeoniflorin alleviates sepsis-associated acute kidney injury through JNK/NEK7/NLRP3 pathway

作　　者：张铭 雷娇 龚禹 谢菁 李若男 马玉清[2] ZHANG Ming;LEI Jiao;GONG Yu;XIE Jing;LI Ruonan;MA Yuqing(The First Clinical Medical College of Lanzhou University,Lanzhou 730000,China;Department of Anesthesiology,The First Hospital of Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州大学第一临床医学院,甘肃兰州730000 [2]兰州大学第一医院麻醉科,甘肃兰州730000

出　　处：《中国病理生理杂志》2024年第9期1711-1717,共7页Chinese Journal of Pathophysiology

基　　金：兰州大学第一医院院内基金资助项目(No.ldyyyn2022-5);兰州市城关区科技项目(No.2021SHFZ0005)。

摘　　要：目的:基于细胞焦亡和JNK/NEK7/NLRP3通路,研究芍药苷(PF)对小鼠脓毒症相关急性肾损伤(SA-AKI)的作用和机制。方法:腹腔注射脂多糖(LPS)建立小鼠SA-AKI模型。雄性6~8周龄C57BL/6J小鼠24只,随机数字表法分为4组:对照(control,Con)组(在相同时间腹腔注射等量含DMSO的PBS);LPS组(腹腔注射LPS 15 mg/kg);LPS+PF组(造模前30 min腹腔注射PF 50 mg/kg),LPS+PF+anisomycin组(造模前30 min腹腔注射PF 50 mg/kg和JNK激动剂anisomycin 20 mg/kg)。造模后24 h取材,HE染色观察肾组织病理变化,进行肾损伤Paller评分;ELISA检测肾损伤标志物:血肌酐(Scr)、肾损伤分子1(KIM-1)和炎症因子白细胞介素1β(IL-1β)、IL-18水平;Western blot检测磷酸化JNK(p-JNK)、NIMA相关激酶7(NEK7)、Nod样受体蛋白3(NLRP3)、gasdermin D的N端片段(GSDMD-N)蛋白变化。结果:相较于Con组,LPS组HE染色显示肾组织发生充血水肿,肾小管扩张管腔内出现颗粒或细胞样管型,肾间质出现充血水肿,Paller评分升高,Scr、血清KIM-1水平升高(P<0.05),肾组织IL-1β、IL-18水平升高(P<0.05),p-JNK、NEK7、NLRP3、GSDMD-N表达上升(P<0.05)。相较于LPS组,LPS+PF组HE染色及肾损伤Paller评分显示肾组织病理损伤情况减轻,Scr、血清KIM-1水平降低(P<0.05),肾组织IL-1β、IL-18水平降低(P<0.05),p-JNK、NEK7、NLRP3、GSDMD-N蛋白表达下降(P<0.05)。相较于LPS+PF组,LPS+PF+anisomycin组HE染色及肾损伤Paller评分显示肾组织病理损伤加重,Scr、血清KIM-1水平升高(P<0.05),肾组织IL-1β、IL-18水平升高(P<0.05),p-JNK、NEK7、NLRP3、GSDMD-N表达上升(P<0.05)。结论:芍药苷可能通过抑制JNK/NEK7/NLRP3信号通路,减轻细胞焦亡和炎症反应,改善SA-AKI。AIM:The effects and mechanisms of paeoniflorin(PF)on sepsis-associated acute kidney injury(SA-AKI)in mice were investigated based on cellular pyroptosis and the JNK/NEK7/NLRP3 pathway.METHODS:A murine SA-AKI model was established by intraperitoneal injection of lipopolysaccharide(LPS).Twenty-four male C57BL/6J mice aged 6~8 weeks were divided into four groups(n=6)using a randomized numerical table method:control(Con)group(an equal amount of DMSO-containing PBS was injected intraperitoneally at the same time);LPS group(LPS was injected intraperitoneally at 15 mg/kg);LPS+PF group(PF was injected intraperitoneally at 50 mg/kg for 30 min prior to modeling);and LPS+PF+anisomycin group(intraperitoneal injection of PF 50 mg/kg and JNK agonist anisomycin 20 mg/kg 30 min before modeling).Samples were taken 24 h after modeling.HE staining was used to observe the pathological changes in renal tissues,and Paller scoring of renal injury was performed.ELISA was used to detect the levels of renal injury markers:blood creatinine(Scr),kidney injury molecule 1(KIM-1),and the inflammatory factors interleukin 1β(IL-1β)and IL-18.Western blot was used to detect changes in phosphorylated c-Jun N-terminal kinase(p-JNK),NIMA-related expressed kinase 7(NEK7),nucleotide oligomerization domain(NOD)-like receptor protein 3(NLRP3),and N-terminal fragment of gasdermin D(GSDMD-N)protein levels.RESULTS:Compared with the Con group,HE staining in the LPS group showed congestion and edema in renal tissues,granular or cell-like tubular patterns in the dilated tubular lumen of renal tubules,and congestion and edema in the renal interstitium.Paller scores,Scr,serum KIM-1,IL-1β,and IL-18 levels in renal tissues were elevated(P<0.05).The expression of p-JNK,NEK7,NLRP3,and GSDMD-N also increased(P<0.05).Compared with the LPS group,the LPS+PF group exhibited reduced renal histopathological injury,decreased Paller score,Scr,serum KIM-1,IL-1β,and IL-18 levels(P<0.05),and decreased protein expression of p-JNK,NEK7,NLRP3,and GSDMD-N(P<0.05).Compared with

关 键 词：脓毒症 急性肾损伤 芍药苷 细胞焦亡 NIMA相关激酶 Nod样受体蛋白 

分 类 号：R285.5[医药卫生—中药学] R6311.2[医药卫生—中医学] R363