天然产物研究与开发 ›› 2024, Vol. 36 ›› Issue (4): 589-596.doi: 10.16333/j.1001-6880.2024.4.005

• 研究论文 • 上一篇    下一篇

藏红花素调控NLRP3通路抑制上皮间质转化治疗糖尿病肾病的机制研究

刘玉斌1,苏金浩1,陈   伟1, 王   军2,及晓晖1,刘英凯1,王元松1*   

  1. 1河北省沧州中西医结合医院,沧州 061000;2辽宁省军区沈阳第十四离职干部休养所,沈阳 110000
  • 出版日期:2024-04-28 发布日期:2024-04-28
  • 基金资助:
    河北省中医药管理局课题(2024458);王元松全国名老中医药专家传承工作室(2022-48)

Mechanism of crocin in the treatment of diabetic kidney disease by inhibiting epithelial-mesenchymal transition through regulating NLRP3 pathway

LIU Yu-bin 1,SU Jin-hao1,CHEN Wei1,WANG Jun2,JI Xiao-hui1,LIU Ying-kai1,WANG Yuan-song1*   

  1. 1Cangzhou Hospital of Integrated Traditional Chinese Medicine and Western Medicine of Hebei Province,Cangzhou 061000,China;2Shenyang 14th Rest Home for Retired Cadres of Liaoning Province,Shenyang 110000,China
  • Online:2024-04-28 Published:2024-04-28

摘要:

本研究从上皮间质转化(epithelial-mesenchymal transition,EMT)和NLRP3通路角度研究藏红花素(crocin,CRO)治疗糖尿病肾病(diabetic kidney disease,DKD)的效果及作用机制。将60只C57BL/6J小鼠适应性喂养1周,随机选取10只作为正常组,采取正常饲养。其余小鼠接受高脂饮食继续喂养8周,之后链脲佐菌素造模并随机平均分为模型组、MCC950组(10 mg/kg MCC950,腹腔注射)、低剂量CRO组(5 mg/kg,灌胃)、中剂量CRO组(10 mg/kg,灌胃)、高剂量CRO组(20 mg/kg,灌胃)。治疗8周后,收集小鼠24 h尿液样本、血液样本、肾脏进行分析测定。采用试剂盒测定小鼠24 h尿蛋白定量(24 h-urine total protein,24 h-UTP)、血清肌酐(serum creatinine,Scr)、血尿素氮(blood urea nitrogen,BUN)评估其肾功能。对肾脏同一部位进行苏木素-伊红(hematoxylin-eosin,HE)、马松(Masson)染色,观察其病理学变化。采用实时荧光定量聚合酶链反应(real-time quantitative polymerasechain reaction,RT-qPCR)以及蛋白质印迹(Western blotting)检测EMT相关因子[上皮细胞钙黏蛋白(E-cadherin,E-cad)、波形蛋白(vimentin,VIM)、平滑肌肌动蛋白(alpha-smooth muscle actin,α-SMA)、转化生长因子-β(transforming growth factor beta,TGF-β)]表达情况以评估CRO对EMT的影响,检测NOD样受体热蛋白结构域相关蛋白(NOD-like receptor thermal protein domain associated protein 3,NLRP3)相关因子[NLRP3、凋亡相关斑点样蛋白(apoptosis-associated speck-like protein containing a CARD,ASC)、半胱氨酸天冬氨酸酶1剪切体(cleaved-caspase-1)、白介素1β成熟体(mature-interleukin-1 beta,mature-IL-1β)、白介素18成熟体(mature-IL-18)]表达情况以评估CRO对NLRP3通路的影响。结果表明,与模型组相比,CRO治疗后,DKD小鼠Scr、BUN、24 h-UTP有不同程度降低,肾组织病理损伤有不同程度的好转,E-cad表达升高,VIM、α-SMA、TGF-β1表达降低,NLRP3、ASC、cleaved-caspase-1、mature-IL-1β、mature-IL-18表达下调。以上结果提示CRO可以通过抑制NLRP3通路抑制上皮细胞-间充质细胞转换EMT最终缓解DKD。

关键词: 藏红花素, 糖尿病肾病, 上皮间质转化, NLRP3通路

Abstract:

This study aims to investigate the effect and mechanism of crocin (CRO) on diabetic kidney disease (DKD) from the perspective of epithelial-mesenchymal transition (EMT) and NLRP3 pathway.Sixty C57BL/6J mice were adaptively fed for one week and ten mice were selective as normal control group randomly.The remain mice received high-fat diet for eight weeks followed by streptozotocin (STZ) injection. After STZ modeling,the modeled mice were randomly divided into model group,NLRP3 inhibitor group (10 mg/kg,intraperitoneal injection),low-dose CRO group (5 mg/kg,gavage),middle-dose CRO group (10 mg/kg,gavage),high-dose CRO group (20 mg/kg,gavage).After eight weeks of treatment,24 h urine samples,blood samples and kidneys were collected for analysis and determination.The 24 h-urine total protein (24 h-UTP),serum creatinine (Scr) and blood urea nitrogen (BUN) were measured by the kit to evaluate the renal function of the mice.The pathological changes of the kidney were observed by hematoxylin-eosin (HE) and Masson staining.Real-time quantitative polymerasechain reaction (RT-qPCR) and Western blotting were used to detect the expression of EMT-related factors [E-cadherin (E-cad),vimentin (VIM),alpha-smooth muscle actin (α-SMA),transforming growth factor beta (TGF-β)] to evaluate the effect of CRO on EMT.The expression of NOD-like receptor thermal protein domain associated protein 3 (NLRP3) related factors [NLRP3,apoptosis-associated speck-like protein containing a CARD (ASC),cleaved-caspase-1,mature-interleukin-1 beta (mature-IL-1β),mature-IL-18] was detected to evaluate the effect of CRO on NLRP3 pathway.The results showed that Scr,BUN,and 24 h-UTP in DKD mice treated with CRO decreased to varying degrees,and the pathological damage of renal tissue was improved to varying degrees.The expression of E-cad increased,while the expression of VIM,α-SMA,and TGF-β1 decreased.The expression of NLRP3,ASC,cleaved-caspase-1,mature-IL-1β and mature-IL-18 were down-regulated.These results suggest that CRO inhibits EMT by inhibiting NLRP3 pathway to alleviate DKD.

Key words: crocin, diabetic kidney disease, epithelial-mesenchymal transition, NLRP3 pathway

中图分类号:  R285.5