上海交通大学学报(医学版) ›› 2025, Vol. 45 ›› Issue (11): 1443-1457.doi: 10.3969/j.issn.1674-8115.2025.11.004

• 论著 · 基础研究 • 上一篇    

LINC01123通过结合ENO1促进胃癌的增殖和糖酵解

张舒琼1,2,3,4, 柯星1, 赵兴贺1, 陈晓翠1, 郑浩东1, 陈惠1, 沈立松1,2,3(), 杨俊瑶1,3,5()   

  1. 1.上海交通大学医学院附属新华医院检验科,上海 200092
    2.上海交通大学医学院医学技术学院医学检验技术系,上海 200025
    3.上海市实验医学研究院智慧医学研究所,上海 200092
    4.广东省深圳市第二人民医院检验科,深圳 518035
    5.上海交通大学医学院附属新华医院临床研究中心,上海 200092
  • 收稿日期:2025-05-29 接受日期:2025-06-30 出版日期:2025-11-28 发布日期:2025-12-03
  • 通讯作者: 沈立松,教授,博士;电子信箱:lisongshen@hotmail.com
    杨俊瑶,副研究员,博士;电子信箱:yangjunyao@xinhuamed.com.cn
  • 作者简介:第一联系人:为共同第一作者(co-first authors)。
  • 基金资助:
    国家自然科学基金(81802082);国家自然科学基金(81672363);上海市科技创新行动计划自然科学基金(21ZR1441500);上海交通大学医工交叉项目(YG2025QNB48);上海交通大学医学院附属新华医院院级临床研究创新基金项目(24XHCR04B)

LINC01123 promotes proliferation and glycolysis of gastric cancer via binding to ENO1

ZHANG Shuqiong1,2,3,4, KE Xing1, ZHAO Xinghe1, CHEN Xiaocui1, ZHENG Haodong1, CHEN Hui1, SHEN Lisong1,2,3(), YANG Junyao1,3,5()   

  1. 1.Department of Laboratory Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
    2.Faculty of Medical Laboratory Technology, College of Health Science and Technology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
    3.Institute of Artificial Intelligence Medicine, Shanghai Academy of Experimental Medicine, Shanghai 200092, China
    4.Department of Laboratory Medicine, Shenzhen Second People′s Hospital, Guangdong Province, Shenzhen 518035, China
    5.Clinical Research Unit, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
  • Received:2025-05-29 Accepted:2025-06-30 Online:2025-11-28 Published:2025-12-03
  • Contact: SHEN Lisong, E-mail: lisongshen@hotmail.com
    YANG Junyao, E-mail: yangjunyao@xinhuamed.com.cn.
  • Supported by:
    National Natural Science Foundation of China(81802082);Natural Science Foundation of Shanghai Science and Technology Innovation Action Plan(21ZR1441500);Medical Engineering Cross Fund of Shanghai Jiao Tong University(YG2025QNB48);Hospital Funded Clinical Research, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine(24XHCR04B)

摘要:

目的·研究长链非编码RNA LINC01123在胃癌中的表达及其促进肿瘤进展的作用机制,探讨LINC01123成为一种新的胃癌诊断标志物和治疗靶点的可能性。方法·基于癌症基因组图谱(The Cancer Genome Atlas,TCGA)和基因表达综合(Gene Expression Omnibus,GEO)数据库(GSE95667、GSE99416)分析胃癌组织与正常组织中lncRNA的表达差异,使用R语言筛选并确定研究对象LINC01123。利用qRT-PCR验证LINC01123在胃癌细胞系及组织样本中的表达水平。通过基因过表达及敲减,利用CCK-8、克隆形成、划痕实验以及Transwell迁移与侵袭实验体外评估LINC01123对细胞增殖和转移能力的影响;构建裸鼠皮下成瘤模型,观察LINC01123对肿瘤生长的促进作用;检测ATP和乳酸浓度以验证LINC01123对糖酵解的调控能力。进一步通过转录物组测序及基因集富集分析(Gene Set Enrichment Analysis,GSEA)探索其可能参与的分子通路。RNA pull-down联合质谱分析初步筛选LINC01123结合蛋白,结合catRAPID数据库预测并通过蛋白质截断突变体和RNA免疫沉淀(RNA immunoprecipitation,RIP)实验确定关键结合区域;通过功能相互作用实验明确α-烯醇化酶(α-enolase,ENO1)是否介导LINC01123的促肿瘤效应。结果·LINC01123在胃癌组织和细胞中显著高表达,并与患者的不良预后密切相关(P=0.021)。功能实验表明,LINC01123显著促进胃癌细胞如MKN-45细胞的增殖、迁移、侵袭和糖酵解,且在裸鼠体内促进肿瘤生长(均P<0.05)。机制研究显示,LINC01123主要定位于细胞质,并可与ENO1蛋白的第97~237位氨基酸区域直接结合。进一步发现,在LINC01123过表达胃癌细胞中联合敲减ENO1,部分逆转LINC01123介导的胃癌细胞如MKN-45的促增殖和促迁移效应(均P<0.05),提示ENO1增加可增强LINC01123的在胃癌进展中的促进作用。结论·LINC01123在胃癌中呈高表达,并通过与ENO1蛋白结合促进细胞增殖、转移和糖酵解,进而促进肿瘤进展。其有望作为胃癌的新型诊断和预后生物标志物及治疗靶点。

关键词: LINC01123, 胃癌, α-烯醇化酶, 长链非编码RNA, 增殖

Abstract:

Objective ·To investigate the expression and tumor-promoting mechanism of the long non-coding RNA (lncRNA) LINC01123 in gastric cancer and evaluate its potential as a novel diagnostic biomarker and therapeutic target. Methods ·Differential expression analysis of lncRNAs between gastric cancer and normal tissues was performed based on The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO) datasets (GSE95667, GSE99416) by using R software. LINC01123 was identified as the candidate of interest. Its expression was validated in gastric cancer cell lines and clinical tissue samples by using qRT-PCR. The biological effects of LINC01123 on cell proliferation and metastasis were evaluated in vitro through gene overexpression and knockdown by utilizing CCK-8, colony formation, wound healing, and Transwell migration and invasion assays. In vivo, a subcutaneous xenograft tumor model in nude mice was established to assess the effect of LINC01123 on tumor growth. ATP and lactate production were measured to evaluate the role of LINC01123 in glycolysis. Transcriptome sequencing and Gene Set Enrichment Analysis (GSEA) were conducted to explore related pathways. RNA pull-down combined with mass spectrometry was used to identify proteins interacting with LINC01123. The binding region was predicted using the catRAPID database and validated by constructing α-enolase (ENO1) protein truncation mutants and performing RNA immunoprecipitation (RIP) assays. Functional interaction studies were carried out to determine whether ENO1 mediates the oncogenic effect of LINC01123. Results ·LINC01123 was upregulated in gastric cancer tissues and cell lines and was associated with poor patient prognosis (P=0.021). Functional assays demonstrated that LINC01123 promoted proliferation, migration, invasion, and glycolysis of gastric cancer cells such as MKN-45 in vitro, and enhanced tumor growth in vivo (all P<0.05). Mechanistically, LINC01123 was predominantly localized in the cytoplasm and bound to the 97‒237 amino acid region of ENO1 protein. Further studies showed that ENO1 knockdown in LINC01123-overexpressing cells partially reversed the proliferative and migratory effects of LINC01123 (all P<0.05) , indicating that ENO1 upregulation enhances the tumor-promoting function of LINC01123. Conclusion ·LINC01123 is highly expressed in gastric cancer and promotes tumor progression by binding to ENO1 protein and enhancing proliferation, migration, invasion, and glycolysis. LINC01123 holds promise as a novel diagnostic and prognostic biomarker and a potential therapeutic target for gastric cancer.

Key words: LINC01123, gastric cancer, α-enolase, long non-coding RNA, proliferation

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