天津医药 ›› 2026, Vol. 54 ›› Issue (6): 561-569.doi: 10.11958/20260224

• 细胞与分子生物学 •    下一篇

ACE2在结直肠癌耐药中的作用及其预测价值的研究

董倩(), 陈淑华, 张飞()   

  1. 天津医科大学肿瘤医院公共实验室恶性肿瘤国家临床医学研究中心,天津市恶性肿瘤临床医学研究中心天津市消化系统肿瘤重点实验室 (邮编300060)
  • 收稿日期:2026-01-19 修回日期:2026-02-13 出版日期:2026-06-15 发布日期:2026-06-15
  • 通讯作者: E-mail:feizhang03@tmu.edu.cn
  • 作者简介:董倩(1995),女,硕士在读,主要从事肿瘤耐药和转移机制方面研究。E-mail:15202295390@163.com
  • 基金资助:
    天津市医学重点学科建设资助(TJYXZDXK-3-003A)

Research on the role of ACE2 in drug resistance of colorectal cancer and its predictive vaule

DONG Qian(), CHEN Shuhua, ZHANG Fei()   

  1. Public Laboratory, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Tianjin Key Laboratory of Digestive Cancer, Tianjin 300060, China
  • Received:2026-01-19 Revised:2026-02-13 Published:2026-06-15 Online:2026-06-15
  • Contact: E-mail:feizhang03@tmu.edu.cn

摘要:

目的 探讨血管紧张素转换酶(ACE)2在结直肠癌化疗耐药中的作用,并评估其作为预测性生物标志物的潜力。方法 收集结直肠癌患者和健康对照者血清,采用酶联免疫吸附试验检测ACE2蛋白水平。通过Western blot和qRT-PCR实验检测结直肠癌细胞系中ACE2的基础及化疗药物(顺铂、5-氟尿嘧啶和紫杉醇)诱导表达。使用小干扰RNA(siRNAs)和慢病毒系统构建ACE2敲减及稳定过表达的细胞模型,通过计算敲减和过表达ACE2的细胞模型对顺铂、5-氟尿嘧啶和紫杉醇的半数抑制浓度(IC50),评估ACE2表达对化疗耐药性的调控作用。分别采用CCK-8实验、平板克隆形成实验和Transwell迁移实验评估敲减和过表达ACE2对细胞增殖及迁移能力的影响。结合临床样本分析与公共数据库数据,探究ACE2表达与结直肠癌患者治疗反应及预后的关联。结果 健康对照者的血清ACE2水平高于结直肠癌患者,化疗耐药组患者的血清ACE2水平高于化疗敏感组(P<0.05)。顺铂、5-氟尿嘧啶和紫杉醇可上调结直肠癌细胞中ACE2的表达(P<0.05)。敲减ACE2能降低对上述化疗药物的IC50值,同时抑制细胞增殖与迁移(P<0.05)。生物信息学分析显示ACE2与多种耐药基因具有相关性,且在Kirsten大鼠肉瘤病毒癌基因同源基因(KRAS)低表达的结直肠癌患者中,高表达ACE2者预后更差(P<0.05)。结论 ACE2表达水平与结直肠癌细胞的增殖、迁移能力及化疗耐药性呈正相关,患者化疗后ACE2水平升高可作为预测化疗耐药的潜在生物标志物。

关键词: 血管紧张素转换酶2, 结直肠肿瘤, 细胞增殖, 细胞运动, 预后, 化疗耐药

Abstract:

Objective To investigate the role of angiotensin-converting enzyme 2 (ACE2) in chemoresistance in colorectal cancer (CRC) and evaluate its potential as a predictive biomarker. Methods Serum samples were collected from patients with colorectal cancer and healthy controls, and ACE2 protein levels were measured by enzyme-linked immunosorbent assay (ELISA). Baseline and drug-induced (cisplatin, 5-fluorouracil and paclitaxel) ACE2 expression in CRC cell lines were detected by Western blot assay and quantitative reverse transcription-polymerase chain reaction (qRT-PCR). Small interfering RNAs (siRNAs) and lentiviral systems were employed to construct ACE2 knockdown and stable overexpression cell models. The effect of ACE2 expression on chemoresistance was evaluated by calculating the half-maximal inhibitory concentration (IC50) for cisplatin, 5-fluorouracil and paclitaxel. Cell proliferation and migration abilities were assessed using the Cell Counting Kit-8 (CCK-8) assay, colony formation assay and Transwell assay, respectively. The association between ACE2 expression and treatment response or prognosis in CRC patients was analyzed using clinical specimen and public database. Results Clinical data revealed that serum ACE2 levels were higher in the healthy controls than those in colorectal cancer patients (P<0.05). Serum ACE2 levels were higher in the chemotherapy-resistant group than those in the chemotherapy-sensitive group(P<0.05). Exposure to chemotherapeutic agents (cisplatin, 5-fluorouracil, and paclitaxel) upregulated ACE2 expression in colorectal cancer cells(P<0.05). Knockdown of ACE2 reduced the IC50 value of these drugs, and significantly inhibited cell proliferation and migration(P<0.05). Bioinformatics analysis showed that ACE2 expression was correlated with multiple drug resistance-related genes. Moreover, among colorectal cancer patients with low KRAS expression, high ACE2 expression was associated with poorer prognosis(P<0.05). Conclusion ACE2 expression is positively correlated with malignant phenotypes (proliferation and migration) and chemoresistance in CRC cells. Elevated ACE2 levels in patients after chemotherapy can serve as a potential biomarker for predicting chemoresistance.

Key words: angiotensin-converting enzyme 2, colorectal neoplasms, cell proliferation, cell movement, prognosis, chemotherapy resistance

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