Study on Huangqin Decoction Regulating NEK7-NLRP3/IL-1β to Protect Vascular Endothelial Function in Obese Hyperten-sive Rats Based on Peritubular Fat Inflammatory Microenvironment
10.14148/j.issn.1672-0482.2024.0896
- VernacularTitle:基于管周脂肪炎性微环境的黄芩汤调控NEK7-NLRP3/IL-1β保护肥胖高血压大鼠血管内皮功能研究
- Author:
Xuan LIU
1
;
Fusen ZHAO
;
Qiyao XU
;
Meng ZHANG
;
Can GUO
;
Zhaoyang CHEN
;
Jianping SHEN
;
Xin-Dong WANG
Author Information
1. 南京中医药大学第三临床医学院,江苏 南京 210028
- Keywords:
obesity;
hypertension;
Huangqin decoction;
NEK7;
NLRP3;
IL-1β
- From:
Journal of Nanjing University of Traditional Chinese Medicine
2024;40(9):896-905
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE To explore the effect of Huangqin decoction on improving peritubular fat inflammatory microenvironment and protecting vascular endothelial function in obese hypertensive rats by regulating the NEK7-NLRP3/IL-1β inflammatory axis.METHODS Fifty 4-week-old male Wistar rats were selected,10 of which were randomly selected as the control group,and the oth-er 40 were fed a high-salt and high-fat diet to establish an obese hypertension model.The rats with successful modeling(20 rats)were randomly divided into the model group,normal-dose Huangqin decoction group,high-dose Huangqin decoction group,and IL-1β in-hibitor group,with 5 rats in each group.From the 12th week,the normal-dose group was gavaged with Huangqin decoction 2.835 g·kg-1,the high-dose group was gavaged with Huangqin decoction 5.67 g·kg-1,and the IL-1β inhibitor group was intraper-itoneally injected with 1.5 mg·kg-1 AS101,3 times a week,for 8 weeks.The rats were weighed and blood was collected 12 h after the last administration,and the thoracic aorta and perivascular fat tissue were isolated.Serum inflammatory factors were detected,patho-logical changes were observed,eNOS expression was detected by immunofluorescence,and NEK7,NLRP3,Caspase-1,ASC,and IL-1β expression levels were detected by Western blot and qPCR.RESULTS The rats in the model group had a significant increase in body weight,an increase in the area of peritubular fat lipid droplets,and severe endothelial injury;systolic blood pressure,diastolic blood pressure,serum IL-1β,IL-6,and TNF-α were significantly elevated in the model group,and the expression of eNOS was sig-nificantly reduced,and the expression levels of NEK7,NLRP3,Caspase-1,ASC,and IL-1β proteins and mRNAs were significantly elevated.Compared with the model group,rats in the Huangqin decoction and IL-1β inhibitor groups had lower body weights,reduced endothelial damage,lower systolic and diastolic blood pressures,lower serum IL-1β,IL-6,and TNF-α,and higher eNOS expression.NEK7,NLRP3,Caspase-1,ASC and IL-1β protein expression was significantly reduced in the high dose group of Huan-gqin decoction and the IL-1β inhibitor group.In addition,Huangqin decoction protected the endothelial function of obese hypertensive vessels in a dose-dependent manner,with the effect being more pronounced in the high-dose group.CONCLUSION Huangqin de-coction can improve the inflammatory microenvironment of perivascular fat and protect the vascular endothelial function in obese hyper-tension by regulating the NEK7-NLRP3/IL-1β inflammatory axis.
