实用医学杂志 ›› 2025, Vol. 41 ›› Issue (9): 1273-1284.doi: 10.3969/j.issn.1006-5725.2025.09.002

• 专题报道:肾病 • 上一篇    

IQGAP2在肾细胞癌中的表达以及对肾癌细胞恶性生物学行为的影响

陈浩1,牛云峰2,王琦1,吕婷3,李涛1,曾琨鹏1,樊博1()   

  1. 1.河北医科大学第四医院,泌尿外科,(河北 石家庄 050035 )
    2.河北医科大学第四医院,肿瘤内科,(河北 石家庄 050035 )
    2.中国人民解放军联勤保障部队 第九八〇医院病理科 (河北 石家庄 050035 )
  • 收稿日期:2025-01-06 出版日期:2025-05-10 发布日期:2025-05-20
  • 通讯作者: 樊博 E-mail:syfanbo@hebmu.edu.cn
  • 基金资助:
    国家自然科学基金面上项目(81572441);河北省医学科学研究课题计划(20250109)

The expression of IQGAP2 in renal cell carcinoma and its effect on the malignant biological behavior of renal cell carcinoma

Hao CHEN1,Yunfeng NIU2,Qi WANG1,Ting LÜ3,Tao LI1,Kunpeng ZENG1,Bo FAN1()   

  1. Department of Urology,the Fourth Hospital of Hebei Medical University,Shijiazhuang 050035,Hebei,China
  • Received:2025-01-06 Online:2025-05-10 Published:2025-05-20
  • Contact: Bo FAN E-mail:syfanbo@hebmu.edu.cn

摘要:

目的 探讨IQGAP2在肾细胞癌组织以及ACHN和786-O细胞系中的表达模式,并分析其对肾癌细胞增殖及迁移等生物学特性的影响。 方法 首先利用GEO数据库筛选肾细胞癌组织与癌旁正常组织之间差异表达基因,并通过GEPIA、TIMER2.0等数据库工具分析IQGAP2在肾细胞癌与正常组织中的表达水平。随后构建IQGAP2的敲低(siRNA)及过表达质粒,并将质粒转染至ACHN和786-O细胞系中,以进行一系列功能实验,从而评估IQGAP2对肾癌细胞恶性生物学行为的影响。采用qRT-PCR及Western blot技术,检测在IQGAP2敲低及过表达后,EMT(上皮-间质转化)相关蛋白的表达变化。 结果 在肾细胞癌组织中,IQGAP2的相对表达量显著低于癌旁正常组织(P < 0.001)。ACHN和786-O细胞中转染si-IQGAP2,可以有效下调IQGAP2 mRNA和蛋白表达水平(P < 0.01);而转染过表达质粒则能够显著上调其mRNA和蛋白表达(P < 0.001)。进一步研究发现,过表达IQGAP2能够显著抑制ACHN和786-O细胞的增殖(P < 0.05)及迁移能力(P < 0.01),而敲低IQGAP2则增强ACHN和786-O细胞的增殖(P < 0.05、P < 0.001)及迁移能力(P < 0.01)。通过qRT-PCR及Western blot检测EMT相关蛋白的表达情况,发现IQGAP2表达的降低能够促进肾癌细胞的EMT进程。 结论 IQGAP2在肾细胞癌组织及细胞中呈现低水平表达,且其表达水平的降低能够促进肾癌细胞的EMT进程,进而增强肾癌细胞的增殖及迁移能力。IQGAP2在肾细胞癌中发挥着重要的肿瘤抑制作用,为肾细胞癌的治疗提供了新的潜在靶点。

关键词: 肾细胞癌, IQ基序GTPase激活蛋白2, 786-O, ACHN, 生物学行为

Abstract:

Objective To investigate the expression pattern of IQGAP2 in renal cell carcinoma tissues and cell lines, and to analyze its effects on the proliferation and migration of renal cell carcinoma cells. Methods Firstly, GEO database was used to screen differentially expressed genes between renal cell carcinoma tissues, and GEPIA, TIMER2.0 were used to analyze the expression level of IQGAP2 in renal cell carcinoma tissue. Subsequently, knockdown (siRNA) and overexpression plasmids of IQGAP2 were constructed and transfected into ACHN and 786-O cell lines to perform a series of functional experiments to evaluate the effect of IQGAP2 on the malignant biological behavior of renal carcinoma cells. qRT-PCR and Western Blot were used to detect the expression of EMT (epithelial-mesenchymal transition) related proteins after knockdown and overexpression of IQGAP2. Results In renal cell carcinoma tissues, the relative expression of IQGAP2 was significantly lower than in adjacent normal tissues (P < 0.001). Transfection of si-IQGAP2 in ACHN and 786-O cells effectively downregulated the mRNA and protein expression levels of IQGAP2 (P < 0.01), while transfection with an overexpression plasmid significantly upregulated its mRNA and protein expression (P < 0.001). Further studies revealed that overexpression of IQGAP2 significantly inhibited the proliferation (P < 0.05) and migration (P < 0.01) of ACHN and 786-O cells, whereas knockdown of IQGAP2 enhanced their proliferation (P < 0.05, P < 0.001) and migration (P < 0.01). Through qRT-PCR and Western blot analyses of EMT-related proteins, it was found that reduced expression of IQGAP2 promoted the epithelial-mesenchymal transition (EMT) process in renal cancer cells. Conclusions The expression of IQGAP2 is low in renal cell carcinoma tissues and cells, and the decrease of the expression level can promote the EMT process of renal cell carcinoma cells, and then enhance the proliferation and migration of renal cell carcinoma cells. IQGAP2 plays an important tumor suppressor role in renal cell carcinoma.

Key words: renal cancer, IQGAP2, 786-O, ACHN, biological behavior

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