ITGA2在结直肠癌中的单基因生物信息学分析
Bioinformatics Analysis of ITGA2 as a Single Gene in Colorectal Cancer
DOI: 10.12677/jcpm.2026.52163, PDF,   
作者: 金 奇：山东大学齐鲁第二医院消化内科，山东 济南
关键词: ITGA2；结直肠癌；生物信息学；TCGA；ITGA2； Colorectal Cancer； Bioinformatics； TCGA
摘要: 基于TCGA数据库，本研究系统分析了ITGA2在结肠癌(459例肿瘤，41例正常)与直肠癌(177例肿瘤，10例正常)中的临床病理关联、预后价值及生物学功能。临床病理关联分析显示，ITGA2表达与大多数临床病理特征无显著相关性，仅在直肠癌中与年龄分组相关(P = 0.017)。预后分析表明，ITGA2在结肠癌整体人群中无显著预后价值(Log-rank P = 0.498)，但在直肠癌中是独立保护性预后因素(HR = 0.400, 95% CI: 0.163~0.982, P < 0.05)。亚组分析进一步揭示了其预后价值的背景依赖性：在结肠癌M1期亚组(HR = 0.43, P = 0.023)，以及直肠癌女性(HR = 0.16, P = 0.0089)和T3期(HR = 0.14, P = 0.0029)亚组中，ITGA2高表达与患者更长生存期显著相关。功能富集分析显示，与ITGA2相关的差异基因在结肠癌和直肠癌中一致富集于氧化磷酸化、核糖体生物合成、ATP代谢等通路，GSEA分析也证实高表达组中代谢通路的显著激活。本研究揭示了ITGA2在结直肠癌中的预后价值具有显著的癌种异质性和亚组特异性——ITGA2是直肠癌的独立保护性预后因素，在结肠癌中则不具备普适性预后价值。其核心功能机制主要涉及调控肿瘤细胞的氧化磷酸化和核糖体生物合成等代谢重编程过程，为基于ITGA2的结直肠癌代谢靶向治疗和精准预后分层提供了新的理论依据。
Abstract: Based on the TCGA database, this study systematically analyzed the clinicopathological associations, prognostic value, and biological functions of ITGA2 in colon cancer (459 tumor cases, 41 normal cases) and rectal cancer (177 tumor cases, 10 normal cases). Clinicopathological association analysis revealed that ITGA2 expression showed no significant correlation with most clinicopathological characteristics, with the exception of age grouping in rectal cancer (P = 0.017). Prognostic analysis demonstrated that ITGA2 had no significant prognostic value in the overall colon cancer population (Log-rank P = 0.498); however, it served as an independent protective prognostic factor in rectal cancer (HR = 0.400, 95% CI: 0.163~0.982, P < 0.05). Subgroup analysis further revealed the context-dependent nature of its prognostic value: ITGA2 high expression was significantly associated with longer survival in the colon cancer M1 stage subgroup (HR = 0.43, P = 0.023), as well as in the female (HR = 0.16, P = 0.0089) and T3 stage (HR = 0.14, P = 0.0029) subgroups of rectal cancer. Functional enrichment analysis showed that ITGA2-related differential genes were consistently enriched in oxidative phosphorylation, ribosome biogenesis, ATP metabolism, and other pathways in both colon and rectal cancers, and GSEA analysis also confirmed significant activation of metabolic pathways in the high-expression group. This study reveals that the prognostic value of ITGA2 in colorectal cancer exhibits significant cancer-type heterogeneity and subgroup specificity—ITGA2 is an independent protective prognostic factor for rectal cancer but lacks universal prognostic value in colon cancer. Its core functional mechanisms primarily involve the regulation of metabolic reprogramming processes such as oxidative phosphorylation and ribosome biogenesis in tumor cells, providing novel theoretical evidence for ITGA2-based metabolic-targeted therapy and precise prognostic stratification in colorectal cancer.
文章引用：金奇. ITGA2在结直肠癌中的单基因生物信息学分析[J]. 临床个性化医学, 2026, 5(2): 612-621. https://doi.org/10.12677/jcpm.2026.52163

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