Hypoxia amplifies lipopolysaccharide-induced IL-1β expression in macrophages
- VernacularTitle:低氧增强巨噬细胞中脂多糖诱导的IL-1β表达
- Author:
Yu-Shan BAI
1
;
Shi-Yu JIAO
;
Ai-Juan QU
Author Information
1. 首都医科大学基础医学院生理学与病理生理学系重塑相关心血管疾病教育部重点实验室代谢紊乱相关心血管疾病北京市重点实验室
- Keywords:
hypoxia;
hypoxia inducible factor;
macrophage;
IL-1β
- From:
Basic & Clinical Medicine
2018;38(5):610-615
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effect of hypoxia on the expression of IL-1βin macrophages.Methods RAW264.7 cells were treated with normoxia(21%O2),hypoxia(2%O2), normoxia(21%O2)plus LPS and hypoxia(2%O2)plus LPS.RT-qPCR was used to detect the mRNA expression of Vegf,Nlrp3 and Il1b.Western blot was used to detect the protein expression of HIF-1α,NLRP3,caspase-1,cleaved caspase-1,Pro-IL-1βand IL-1β.The peritoneal macrophages of Vhlfl/fl/Apoe-/-mice and VhlΔMac/Apoe-/-mice were treated with or without LPS.RT-qPCR was used to detect the mRNA expression of Vhl,Nlrp3,Il1b and Il6.Results Compared with nor-moxia, hypoxia significantly increased mRNA of Vegf, Nlrp3 and Il1b in RAW264.7(P<0.01).Hypoxia increased mRNA and protein of NLRP 3 and IL-1βin RAW264.7 induced with LPS comparing with normoxia(P<0.01).Hypoxia had no effects on the activation of caspase-1 and the subsequent maturation of Pro-IL-1βinduced with LPS in RAW264.7.Compared with Vhlfl/fl/Apoe-/-peritoneal macrophages,VhlΔMac/Apoe-/-peritoneal macro-phages showed significantly increased mRNA levels of Nlrp3,Il1b and Il6 induced with LPS(P<0.05).Conclu-sions Hypoxia amplifies lipopolysaccharide-induced IL-1βexpression in macrophages.
