雷公藤红素通过抑制NF-κB减轻草酸钠诱导的急性肾损伤和晶体沉积  

Celastrol attenuates sodium oxalate-induced acute kidney injury and crystal deposition by inhibiting NF-κB

作　　者：刘益亨 郑权友 张湾元 杨琛皓 陈思宇 林文标 赵斯羽 许桂莲[2] 张克勤 LIU Yiheng;ZHENG Quanyou;ZHANG Wanyuan;YANG Chenhao;CHEN Siyu;LIN Wenbiao;ZHAO Siyu;XU Guilian;ZHANG Keqin(Urinary Nephropathy Center,the Second Affiliated Hospital of Chongqing Medical University,Chongqing;Department of Immunology,College of Basic Medical Sciences,No.958 Hospital,First Affiliated Hospital,Army Medical University(Third Military Medical University),Chongqing,China;Department of Nephrology and Urology,No.958 Hospital,First Affiliated Hospital,Army Medical University(Third Military Medical University),Chongqing,China)

机构地区：[1]重庆医科大学附属第二医院泌尿肾病中心,重庆 [2]陆军军医大学(第三军医大学)基础医学院免疫学教研室,重庆 [3]陆军军医大学(第三军医大学)第一附属医院第九五八医院肾病泌尿科,重庆

出　　处：《陆军军医大学学报》2025年第7期691-700,共10页Journal of Army Medical University

基　　金：重庆市自然科学基金面上项目(CSTB2022NSCQ-MSX0099);陆军军医大学本科生科研培育项目(2024XBK24)。

摘　　要：目的探究雷公藤红素(Celastrol,Cel)在减轻草酸钠(sodium oxalate,NaOx)诱导的急性肾损伤(acute kidney injury,AKI)和晶体沉积中的作用及其机制。方法选用C57BL/6雄性小鼠(年龄8~12周,体质量22~24 g),按随机数字表法分为3组:Saline组(对照组)腹腔注射生理盐水,正常饮用水;NaOx组(损伤组),腹腔注射NaOx(75 mg/kg),NaOx溶液(50μmol/L)作为饮用水;NaOx+Cel组(治疗组),提前24 h腹腔注射Cel(1 mg/kg),腹腔注射NaOx(75 mg/kg),NaOx溶液(50μmol/L)作为饮用水,24 h后收集所有标本。选用HK-2细胞构建模型,按随机数字表法分为4组:Medium组不作处理;NaOx组加入NaOx(终浓度500μmol/L)处理细胞;NaOx+Cel组在预处理Cel(终浓度400 nmol/L)2 h后加入NaOx(终浓度500μmol/L)处理细胞;NaOx+Cel+BA组在加入NaOx(终浓度500μmol/L)2 h后加入NF-κB激动剂BA(终浓度8μmol/L)处理细胞,其他步骤同NaOx+Cel组,24 h后收集各组细胞。采用Von Koosa和细胞黏附实验观察晶体沉积;采用HE染色观察肾脏组织病理并进行损伤评分;采用CCK-8检测NaOx和Cel的最适浓度;采集血清检测尿素和肌酐;采用IHC检测OPN、CD44、KIM-1、NGAL、p65、IL-1β、BAX、Caspase-3的表达;Western blot检测OPN、CD44、KIM-1、p65、P-p65、IL-1β蛋白表达。结果动物实验中,与NaOx组相比,NaOx+Cel组小鼠晶体沉积减少(P<0.0001),肾小管受损减轻(P<0.01),血清尿素和肌酐降低(P<0.05),肾脏黏附分子OPN与CD44、肾脏损伤分子KIM-1与NGAL、炎症相关分子p65与IL-1β、凋亡相关分子BAX、Caspase-3表达均下降(P<0.05)。而在细胞实验中,与NaOx组相比,NaOx+Cel组的晶体黏附减少(P<0.0001),黏附分子OPN与CD44表达下降(P<0.05),炎症分子IL-1β和P-p65/p65的比值下调(P<0.05),肾损伤分子KIM-1下调(P<0.05)。与NaOx+Cel组相比,NaOx+Cel+BA组晶体黏附明显增多(P<0.0001),炎症分子IL-1β和P-p65/p65的比值上升(P<0.05),肾损伤分子KIM-1增多(P<0.05)。结论雷公藤红素可能通过抑制NF-κB的活化减�Objective To investigate the role and possible mechanism of celastrol(Cel)in sodium oxalate(NaOx)-induced acute kidney injury(AKI)and crystal deposition in the kidney tissues in mice.Methods Male C57BL/6 mice(aged 8~12 weeks,weighing 22~24 g)were randomly divided into 3 groups.Saline group(control group,intraperitoneal injection with normal saline and drinking water freely),NaOx group(injured group,intraperitoneal injection of 75 mg/kg NaOx,and drinking water containing 50μmol/L NaOx),and NaOx+Cel group(treatment group,intraperitoneal injection of 1 mg/kg Cel firstly and then 75 mg/kg NaOx in 24 h later,drinking water containing 50μmol/L NaOx).All specimens were collected in 24 h after NaOx injection.HK-2 cells were randomly divided into 4 groups:Medium group(no treatment),NaOx group(500μmol/L NaOx),NaOx+Cel group(400 nmol/L Cel pre-treatment for 2 h followed by 500μmol/L NaOx treatment),and NaOx+Cel+BA group[8μmol/L betulinic acid(BA,NF-κB agonist)after the interventions as the NaOx+Cel group].Cells of each group were collected in 24 h after corresponding treatments.Von Koosa and cell adhesion assays were used to observe crystal deposition.HE staining was employed to observe renal histopathology and score the damage.CCK-8 assay was utilized to detect cell viability to obtain the optimal concentrations of NaOx and Cel.Serum urea and creatinine levels were detected.Immunohisotochemical assay was conducted to detect the expression of OPN,CD44,KIM-1,NGAL,p65,IL-1β,BAX,and Caspase-3,and Western blotting was performed for protein levels of OPN,CD44,KIM-1,p65,P-p65 and IL-1β.Results The mice in the NaOx+Cel group showed reduced crystal deposition(P<0.0001),attenuated renal tubular damage(P<0.01),decreased serum urea and creatinine levels(P<0.05),and declined expression levels of the renal adhesion molecules OPN and CD44,the kidney injury molecules KIM-1 and NGAL,the inflammation-associated molecules p65 and IL-1β,and the apoptosis related molecules BAX and Caspase-3 when compared with the NaOx group(P<0.05).In

关 键 词：雷公藤红素 草酸钠 NF-ΚB 急性肾损伤 

分 类 号：R285.5[医药卫生—中药学] R363.2[医药卫生—中医学] R692.6