上海交通大学学报(医学版) ›› 2025, Vol. 45 ›› Issue (6): 693-704.doi: 10.3969/j.issn.1674-8115.2025.06.004

• 论著 · 基础研究 • 上一篇    下一篇

磷脂酰乙醇胺引起内质网应激促进巨噬细胞衰老及肝损伤

韩龙传1,2, 李悦1,2, 邹智慧1,2, 罗静1,2,3, 李若伊1, 张颖婷1,2,4, 唐欣欣1,2, 田丽红1,2,3, 陆宇恒1,2, 黄莺1, 贺明1,2(), 付寅坤1,2()   

  1. 1.上海交通大学基础医学院病理生理学系,细胞分化与凋亡教育部重点实验室,上海市细胞稳态调控与疾病前沿科学研究基地,上海 200025
    2.上海交通大学医学院附属第九人民医院细胞命运与疾病转化医学研究院,上海 200025
    3.昆明医科大学基础医学院病理学与病理生理学系,昆明 650500
    4.上海交通大学医学院附属瑞金医院中心实验室,上海 200025
  • 收稿日期:2025-01-24 接受日期:2025-02-28 出版日期:2025-06-28 发布日期:2025-06-28
  • 通讯作者: 付寅坤,实验师,博士;电子信箱:yinkunfu@shsmu.edu.cn
    贺 明,教授,博士;电子信箱:heming@shsmu.edu.cn
  • 作者简介:韩龙传(1999—),男,硕士生;电子信箱:lc.han@sjtu.edu.cn
  • 基金资助:
    国家自然科学基金(32371244);东方英才计划;上海交通大学医学院高水平地方高校创新团队(SHSMU-ZDCX20212000);上海交通大学医学院基础医学院青年人才支持计划(2024RCZC-C-03)

Phosphatidylethanolamine promotes macrophage senescence and liver injury by activating endoplasmic reticulum stress

HAN Longchuan1,2, LI Yue1,2, ZOU Zhihui1,2, LUO Jing1,2,3, LI Ruoyi1, ZHANG Yingting1,2,4, TANG Xinxin1,2, TIAN Lihong1,2,3, LU Yuheng1,2, HUANG Ying1, HE Ming1,2(), FU Yinkun1,2()   

  1. 1.Frontier Research Center for Cell Homeostasis and Disease Control; Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education; Department of Pathophysiology, Shanghai Jiao Tong University College of Basic Medical Sciences, Shanghai 200025, China
    2.Institute for Translational Medicine on Cell Fate and Disease, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
    3.Department of Pathology and Pathophysiology, School of Basic Medicine, Kunming Medical University, Kunming 650500, China
    4.Central Laboratory, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
  • Received:2025-01-24 Accepted:2025-02-28 Online:2025-06-28 Published:2025-06-28
  • Contact: FU Yinkun, E-mail: yinkunfu@shsmu.edu.cn
    HE Ming, E-mail: heming@shsmu.edu.cn.
  • Supported by:
    National Natural Science Foundation of China(32371244);Eastern Talent Plan Leading Project;Innovative Research Team of High-Level Local Universities in Shanghai(SHSMU-ZDCX20212000);Youth Talent Support Program Project of the School of Basic Medical Sciences, Shanghai Jiao Tong University School of Medicine(2024RCZC-C-03)

摘要:

目的·探讨磷脂酰乙醇胺(phosphatidylethanolamine,PE)对巨噬细胞衰老及其衰老相关分泌表型的影响和分子机制,以及PE在肝损伤中的病理生理学意义。方法·利用阿霉素建立巨噬细胞衰老模型,并给予PE处理。通过腹腔联合注射PE和脂多糖构建小鼠肝损伤模型,观察PE对肝损伤的影响。采用衰老相关β-半乳糖苷酶(senescence-associated β- galactosidase,SA-β-gal)染色,结合实时荧光定量PCR、Western blotting等检测细胞周期抑制蛋白p21、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)和白介素-6(interleukin-6,IL-6)等衰老标志物及衰老相关分泌表型生物活性因子的表达水平。通过RNA测序结合基因本体论(Gene Ontology,GO)细胞组分富集分析、京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)通路富集分析、基因集变异分析(Gene Set Variation Analysis,GSVA)和基因集富集分析(Gene Set Enrichment Analysis,GSEA)筛选PE促进巨噬细胞衰老的信号通路及分子机制。通过体内和体外实验检测内质网应激相关通路中肌醇需求酶1α(inositol requiring enzyme 1 α,IRE1α)、剪接型X盒结合蛋白1(spliced X box binding protein 1,XBP1s)、转录激活因子6(activating transcription factor 6,ATF6)、ATF4、C/EBP同源蛋白(C/EBP homologous protein,CHOP)的表达。结果·PE显著促进巨噬细胞衰老标志物SA-β-gal、p21、p16及衰老相关分泌表型生物活性因子的表达。RNA测序分析显示内质网应激参与PE促进衰老相关分泌表型表达的作用。进一步的实验表明,PE通过激活巨噬细胞内质网应激信号通路促进巨噬细胞衰老及衰老相关分泌表型表达。体内实验证实PE通过内质网应激加剧脂多糖诱导的小鼠肝损伤。结论·PE通过激活内质网应激信号通路,促进巨噬细胞衰老及衰老相关分泌表型生物活性因子分泌,进而加重脂多糖诱导的肝损伤。

关键词: 磷脂酰乙醇胺, 巨噬细胞, 衰老相关分泌表型, 肝损伤, 内质网应激

Abstract:

Objective ·To investigate the effects and molecular mechanisms of phosphatidylethanolamine (PE) on macrophage senescence and its senescence-associated secretory phenotype (SASP), as well as its pathophysiological role in liver injury. Methods ·A macrophage senescence model was established using doxorubicin (DOX), followed by PE treatment. A mouse liver injury model was generated via intraperitoneal co-administration of PE and lipopolysaccharide (LPS) to investigate the effects of PE on liver injury. Senescence markers and SASP factors, including senescence-associated β-galactosidase (SA-β-gal), cell cycle inhibitor p21, tumor necrosis factor-α (TNF-α), and interleukin-6 (IL-6), were evaluated using SA-β-gal staining, quantitative real-time PCR, and Western blotting. RNA sequencing (RNA-seq) was performed, followed by Gene Ontology (GO) cellular component enrichment analysis, Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis, Gene Set Variation Analysis (GSVA), and Gene Set Enrichment Analysis (GSEA), to explore the molecular mechanisms and signaling pathways by which PE promotes macrophage senescence. The expression of endoplasmic reticulum (ER) stress-related proteins, including inositol-requiring enzyme 1 α (IRE1α), spliced X-box binding protein 1 (XBP1s), activating transcription factor 6 (ATF6), ATF4, and C/EBP homologous protein (CHOP), was analyzed through in vivo and in vitro experiments. Results ·PE significantly promoted the expression of senescence markers SA-β-gal, p21, p16 and SASP factors. RNA-seq analysis revealed that ER stress was involved in PE-induced promotion of SASP. Further experiments demonstrated that PE activated the ER stress signaling pathway, promoting macrophage senescence and the expression of SASP factors. In vivo experiments further confirmed that PE exacerbated LPS-induced liver injury in mice through ER stress. Conclusion ·PE promotes macrophage senescence and the expression of SASP factors by activating ER stress signaling pathway, thereby aggravating LPS-induced liver injury.

Key words: phosphatidylethanolamine (PE), macrophage, senescence-associated secretory phenotype (SASP), liver injury, endoplasmic reticulum stress

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