上海交通大学学报(医学版) ›› 2026, Vol. 46 ›› Issue (8): 1067-1081.doi: 10.3969/j.issn.1674-8115.2026.08.007

• 论著 · 基础研究 • 上一篇    

SDCBP的泛癌分析及其对胃癌细胞增殖迁移的影响

张华华1, 党庆庆2, 刘俊丽1, 白静1, 于婧奕1, 陈亚妮1()   

  1. 1.延安大学延安医学院医学研究实验中心,延安 716000
    2.陕西省延安市人民医院手术麻醉科,延安 716000
  • 收稿日期:2025-12-16 接受日期:2026-03-20 出版日期:2026-08-28 发布日期:2026-08-28
  • 通讯作者: 陈亚妮,讲师,博士;电子信箱:yadxchen@yau.edu.cn
  • 作者简介:第一联系人:张华华负责实验设计,生信分析;党庆庆负责文献搜集,临床样本收集;刘俊丽、白静负责临床样本收集,细胞实验和数据分析;于婧奕负责临床样本收集和数据分析;陈亚妮、张华华负责课题的监管和指导,论文撰写和修订。所有作者均阅读并同意最终稿件的提交。
  • 基金资助:
    陕西省自然科学基础研究计划项目(2024JC-YBMS-683);2024年陕西省大学生创新创业训练计划项目(S202410719136)

Pan-cancer analysis of SDCBP and its effects on the proliferation and migration of gastric cancer cells

Zhang Huahua1, Dang Qingqing2, Liu Junli1, Bai Jing1, Yu Jingyi1, Chen Yani1()   

  1. 1.Medical Research and Experiment Center, Yan'an Medical College of Yan'an University, Yan'an 716000, China
    2.Department of Surgical Anesthesiology, Yan'an People's Hospital, Shaanxi Province, Yan'an 716000, China
  • Received:2025-12-16 Accepted:2026-03-20 Online:2026-08-28 Published:2026-08-28
  • Contact: Chen Yani, E-mail: yadxchen@yau.edu.cn.
  • About author:First author contact:Zhang Huahua was responsible for the experimental design and bioinformatic analysis. Dang Qingqing conducted the literature review and collected clinical samples. Liu Junli and Bai Jing were involved in the collection of clinical samples, execution of cell experiments, and data analysis. Yu Jingyi contributed to the collection of clinical samples and data analysis. Chen Yani and Zhang Huahua provided supervision and guidance for the research project, in addition to drafting and revising the manuscript. All authors have reviewed and approved the final manuscript for submission.
  • Supported by:
    Natural Science Foundation of Shaanxi Province(2024JC-YBMS-683);2024 Shaanxi Provincial College Students Innovation and Entrepreneurship Training Program(S202410719136)

摘要:

目的·系统评估Syndecan结合蛋白(syndecan-binding protein,SDCBP)在泛癌中的表达特征、预后价值及其与肿瘤免疫微环境、肿瘤突变负荷(tumor mutational burden,TMB)、药物敏感性的关联,并通过体外实验验证其在胃癌中的生物学功能及潜在机制。方法·通过整合多种生物信息学数据库数据,对SDCBP的差异表达、预后价值、免疫浸润、免疫检查点、TMB/微卫星不稳定性(microsatellite instability,MSI)及药物敏感性进行多组学分析。进一步通过蛋白质印迹法(Western blotting)、细胞计数试剂盒-8(cell counting kit-8,CCK-8)实验、细胞划痕实验及Transwell迁移实验观察SDCBP对胃癌细胞增殖与迁移的影响,并检测其对上皮-间充质转化(epithelial-mesenchymal transition,EMT)相关蛋白和TGF-β/Smad通路的调控作用。结果·SDCBP在包括胃癌在内的多种恶性肿瘤中表达显著上调,其高表达与患者不良预后密切相关(均P<0.05)。同时,SDCBP表达水平与多种免疫浸润细胞、免疫调节因子及主要组织相容性复合体(major histocompatibility complex,MHC)分子呈正相关,且在部分肿瘤中与TMB或MSI显著相关(均P<0.05)。药物敏感性分析表明,SDCBP高表达与肿瘤耐药性呈正相关,并在部分癌种中与瘤内微生物丰度呈负相关(均P<0.05)。体外实验进一步证实,SDCBP在胃癌组织及细胞系中呈高表达。高龄(>65岁)患者中SDCBP表达降低(P<0.05);不同TNM分期(Ⅰ~Ⅳ)患者中SDCBP表达存在差异,其中Ⅲ期表达最高(P<0.05);Lauren分型中弥漫型表达显著高于肠型和混合型(P<0.05);分子亚型分析显示侵袭型SDCBP表达显著高于其他亚型(P<0.001)。沉默SDCBP可抑制胃癌细胞的活力与迁移,而其过表达则促进细胞恶性表型(均P<0.05)。机制研究表明,SDCBP可能通过调控EMT相关蛋白(N-cadherin、Vimentin、Snail1)的表达(均P<0.05)及激活TGF-β/Smad信号通路,促进胃癌进展。结论·SDCBP在泛癌中具有重要的临床指示意义,并在胃癌中可能作为促进肿瘤进展的关键分子,具备成为预后标志物和治疗靶点的潜力。

关键词: Syndecan结合蛋白, 泛癌分析, 胃癌, 生物标志物, 肿瘤微环境

Abstract:

Objective ·To systematically assess the expression characteristics and prognostic significance of syndecan-binding protein (SDCBP) across various cancers, as well as its associations with the tumor immune microenvironment, tumor mutational burden (TMB), and drug sensitivity, and to validate the biological functions and underlying mechanisms of SDCBP in gastric cancer through in vitro experiments. Methods ·This study conducted comprehensive multi-omics analyses to examine the differential expression, prognostic indicators, immune infiltration, immune checkpoints, TMB/microsatellite instability (MSI), and drug sensitivity associated with SDCBP by integrating data from various bioinformatics databases. In addition, Western blotting, cell counting kit-8 (CCK-8) assay, wound healing assay, and Transwell assay were utilized to assess the impact of SDCBP on the proliferation and migration of gastric cancer cells, and to elucidate its regulatory roles in epithelial-mesenchymal transition (EMT)-related proteins and the TGF-β/Smad signaling pathway. Results ·SDCBP expression was significantly upregulated in various malignant tumors, including gastric cancer, and its high expression was closely associated with poor prognosis (all P<0.05). Additionally, SDCBP expression levels exhibited a positive correlation with diverse immune-infiltrating cells, immune regulatory factors, and major histocompatibility complex (MHC) molecules. Furthermore, in certain tumors, SDCBP expression was significantly associated with TMB or MSI (all P<0.05). Drug sensitivity analysis revealed that elevated SDCBP expression was positively correlated with tumor drug resistance, and in specific cancer types, negatively correlated with intratumoral microbial abundance (all P<0.05). In vitro experiments provided further evidence that SDCBP was highly expressed in gastric cancer tissues and cell lines. SDCBP expression was significantly reduced in patients older than 65 years (P<0.05). Furthermore, SDCBP expression levels differed significantly across TNM stages (Ⅰ‒Ⅳ), with stage Ⅲ exhibiting the highest expression (P<0.05). According to Lauren classification, diffuse-type tumors exhibited significantly higher SDCBP expression compared to intestinal-type and mixed-type tumors (P<0.05). Furthermore, molecular subtype analysis indicated that SDCBP expression was significantly greater in the invasive subtype than in other subtypes (P<0.001).The silencing of SDCBP inhibited the viability and migration of gastric cancer cells, whereas its overexpression facilitated the malignant phenotypes of these cells (P<0.05). Mechanistic investigations suggested that SDCBP may advance the progression of gastric cancer by modulating the expression of EMT-related proteins, including N-cadherin, Vimentin, and Snail1 (P<0.05), and by activating the TGF-β/Smad signaling pathway. Conclusion ·SDCBP has important clinical relevance across pan-cancer types and may serve as a key molecule promoting gastric cancer progression, providing theoretical support for its potential role as a prognostic biomarker and therapeutic target.

Key words: syndecan-binding protein (SDCBP), pan-cancer analysis, gastric cancer, biomarker, tumor microenvironment

中图分类号: