ApoAⅠ and AIBP inhibit P2X7R-mediated pyroptosis in macrophages through ABCA1
10.20039/j.cnki.1007-3949.2025.05.005
- VernacularTitle:ApoA Ⅰ和AIBP通过ABCA1抑制P2X7R介导的巨噬细胞焦亡
- Author:
Mengjiao CHEN
1
;
Zhenwang ZHAO
;
Siqi WANG
;
Jianfeng WU
;
Dan LIU
;
Jin ZOU
;
Min ZHANG
Author Information
1. 南华大学衡阳医学院心血管疾病研究所动脉硬化学湖南省重点实验室湖南省动脉硬化性疾病国际科技创新合作基地生物信息与医学大数据教研室,湖南省衡阳市 421001
- Publication Type:Journal Article
- Keywords:
apolipoprotein A Ⅰ;
apolipoprotein A Ⅰ binding protein;
ATP-binding cassette transporter A1;
purinergic 2X7 receptor;
pyroptosis
- From:
Chinese Journal of Arteriosclerosis
2025;33(5):402-411
- CountryChina
- Language:Chinese
-
Abstract:
Aim To explore the effects of apolipoprotein A Ⅰ(ApoA Ⅰ)and apolipoprotein A Ⅰ binding protein(AIBP)on THP-1-derived macrophage pyroptosis.Methods The lactate dehydrogenase(LDH)detection kit was used to evaluate cell membrane integrity,Hoechst33342/PI staining was used to observe cell membrane permeability,ELISA was used to detect the levels of inflammatory factors such as interleukin-1 β(IL-1β)and interleukin-18(IL-18),Western blot was used to detect the expression of pyroptosis-related protein nucleotide-binding domain leucine-rich repeat and pyrin domain-containing receptor 3(NLRP3),gasdermin D(GSDMD),cleaved Caspase-1,IL-1β and IL-18.Results Oxidized low density lipoprotein(ox-LDL)upregulated the expression of NLRP3,GSDMD-N,cleaved Caspase-1,IL-1β and IL-18 in THP-1-derived macrophages in a concentration-dependent manner,and promoted the release of IL-1β,IL-18 and LDH(P＜0.05 or P＜0.01),indicating that ox-LDL induced pyroptosis in THP-1-derived macrophages in a concentration-dependent manner.Co-treatment of macrophages with ApoA Ⅰ and AIBP significantly downregulated the ex-pression of NLRP3,GSDMD-N,cleaved Caspase-1,IL-1β and IL-18,reduced the release of IL-1 β,IL-18 and LDH,and inhibited ox-LDL induced pyroptosis(P＜0.05 or P＜0.01).After ATP-binding cassette transporter A1(ABCA1)siRNA transfection,co-treatment with ApoA Ⅰ and AIBP had no significant effect on the expression of pyroptosis-related proteins and secretion of inflammatory factors(P＞0.05).Co-treatment of macrophages with ApoA Ⅰ and AIBP significantly re-duced the expression of purinergic 2X7R receptor(P2X7R)on the cell membrane,inhibited P2X7R mediated protein ki-nase R(PKR)phosphorylation and NLRP3 inflammasome assembly(P＜0.05 or P＜0.01).After P2X7R siRNA trans-fection,co-treatment with ApoA Ⅰ and AIBP had no significant effect on the expression of pyroptosis-related proteins and secretion of inflammatory factors(P＞0.05).Conclusion ApoA Ⅰ and AIBP reduce the expression of P2X7R on the cell membrane through ABCA1,inhibiting P2X7R/PKR/NLRP3 mediated macrophage pyroptosis.
