1) 广州医科大学-中国科学院广州生物医药与健康研究院联合生命科学学院,细胞命运调控与疾病粤港澳联合高校实验室,广州 511436;2) 南华大学应用解剖学与生殖医学研究所,衡阳 421001;3) 南华大学心血管疾病研究所,湖南省动脉粥样硬化重点实验室,衡阳 421001;4) 广州医科大学附属中医医院,广州市中医医院医学影像科,广州 510130
广东省普通高校青年创新人才项目和特色创新人才项目(2018KQNCX212, 2020KTSCX101),广东省中医药管理局科研项目(20222122),湖南省教育厅优秀青年科研项目(14B183),广州市教育局资助项目(202032801),广州医科大学科研能力提升计划和广州医科大学-中国科学院广州生物医药与健康研究院联合生命科学学院开放课题(2021)和臻选课题(2022)资助项目。
1) GMU-GIBH Joint School of Life Sciences, The Guangdong-Hong Kong-Macau Joint Laboratory for Cell Fate Regulation and Diseases, Guangzhou Medical University, Guangzhou 511436, China;2) Institute of Applied Anatomy and Reproductive Medicine, University of South China, Hengyang 421001, China;3) Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang 421001, China;4) Ultrasonic Medical Department, The Affiliated TCM Hospital of Guangzhou Medical University, Guangzhou Hospital of Traditional Chinese Medicine, Guangzhou 510130, China
This work was supported by grants from the Youth Innovative Talents Program and Characteristic Innovative Talents Program of Regular Institutions of Higher Education of Guangdong Province (2018KQNCX212, 2020KTSCX101), the Scientific Research Project of Traditional Chinese Medicine Bureau of Guangdong Province (20222122), the Excellent Youth Science Research Program of the Education Department of Hunan Province (14B183), Bureau of Education of Guangzhou Municipality (202032801), the Plan on Enhancing Scientific Research in Guangzhou Medical University, and the Open Research Funds(2021) and the Funds of Selected Project(2022) from GMU-GIBH Joint School of Life Sciences, Guangzhou Medical University.
目的 oxLDL可上调Plin2的表达,进而促进泡沫细胞的形成,LOX1是oxLDL的受体。本文探讨Plin2与LOX1在动脉粥样硬化发生发展过程中的关系。方法 从GEO数据库中下载GSE43292,分析Plin2、LOX1的表达及Plin2、LOX1与NF-κB信号通路的相关性。采用oxLDL处理的RAW264.7细胞作为动脉粥样硬化的细胞模型进行研究,蛋白质免疫印迹法检测细胞中Plin2、LOX1和p-p65的表达,荧光中性脂质染料BODIPY 493/503染色法检测细胞内脂滴。结果 通过分析GSE43292数据发现,Plin2、LOX1在颈动脉粥样硬化斑块中的表达显著高于颈动脉邻近组织。oxLDL处理RAW264.7细胞24 h后,Plin2与LOX1的表达、细胞内脂滴明显增加。过表达Plin2的细胞中LOX1表达升高;当用oxLDL孵育过表达Plin2的细胞后,LOX1的水平升高更为显著;但在没有oxLDL处理的情况下,敲减Plin2对细胞内LOX1的表达没有影响。基因集富集分析(gene set enrichment analysis,GSEA)结果显示,在动脉粥样硬化中,Plin2和LOX1的表达与NF-κB的活化呈正相关。此外,尽管采用oxLDL处理细胞,NF-κB抑制剂JSH-23预处理仍可显著降低Plin2与LOX1的表达、细胞内的脂质积聚,过表达Plin2后,JSH-23亦能显著抑制oxLDL孵育的细胞中Plin2和LOX1的表达。结论 Plin2可通过上调LOX1的表达促进细胞内脂质积聚,参与动脉粥样硬化,这一过程至少部分是通过激活NF-κB通路实现的。
Objective OxLDL can increase Plin2 expression, then promote the formation of foam cells. LOX1 was a scavenger receptor for oxLDL. Here, we investigate the relationship between Plin2 and LOX1 in the progress of atherosclerosis.Methods The data GSE43292 from GEO database were analyzed for Plin2 and LOX1 expressions and the correlation between Plin2, LOX1 and NF-κB pathway. RAW264.7 cells stimulated by oxLDL served as a cellular model of atherosclerosis. The Plin2, LOX1 and p-p65 expressions were analyzed by immunoblotting, the intracellular lipids were detected by BODIPY 493/503 staining.Results The Plin2 and LOX1 expressions in atheroma plaques were significantly higher than that in adjacent carotid tissues by analyzing GSE43292. The expressions of Plin2 and LOX1, the lipid droplets were increased obviously in RAW264.7 cells after treated with oxLDL for 24 h. And Plin2 overexpression significantly increased the expression of LOX1. This change was more obvious after oxLDL incubation. But knockdown Plin2 maked no difference on LOX1 when without oxLDL treatment. Furthermore, the GSEA plot showed that the expressions of Plin2 and LOX1 were positively related with NF-κB activation in atherosclerosis. Meanwhile, although oxLDL incubation, NF-κB inhibitor JSH-23 pretreatment significantly reduced Plin2 and LOX1 expressions and the amounts of intracellular lipids. In addition, the expressions of Plin2 and LOX1 were significantly inhibited by JSH-23 in spite of Plin2 overexpression plus oxLDL incubation.Conclusion Altogether, Plin2 can promote the intracellular lipids accumulation and may participate in pathophysiological process of atherosclerosis by increasing the expression of LOX1, which at least partly through the activation of NF-κB pathway.
刘清南,赵晓慧,李帅,郭东铭,袁中华,李靖,董姗姗,王一倩,戴志兵. Plin2通过NF-κB通路参与oxLDL诱导巨噬细胞LOX1的表达[J].生物化学与生物物理进展,2023,50(11):2697-2708
复制生物化学与生物物理进展 ® 2025 版权所有 ICP:京ICP备05023138号-1 京公网安备 11010502031771号