膀胱癌相关基因的筛选及初步验证

Screening and verification for the relevant genes of bladder cancer

  • 摘要: 目的 筛选膀胱癌相关基因并分析其与膀胱癌患者临床指标之间的关联,以鉴定膀胱癌相关功能基因。 方法 利用基因表达谱芯片对比分析膀胱癌患者癌及癌旁组织,筛选差异表达基因,选取表达水平差异较大的基因,利用实时定量PCR技术,在34例膀胱癌患者中检测其表达水平,分析差异基因与膀胱癌患者多种临床指标之间的关联。 结果 利用基因表达谱芯片初步筛选出多个差异表达基因(6 526个),进一步选取其中12个差异较大的基因,在多样本中的验证结果表明,其中4个基因:CEACAM5、LY6D、MYH11及CNN1的表达水平与芯片检测结果一致。随后将这4个基因表达水平与临床指标(年龄、性别、吸烟史和肿瘤侵袭程度)进行关联性分析,结果显示肌层浸润性膀胱癌与非肌层浸润性膀胱癌CEACAM5、MYH11及CNN1的表达水平有统计学差异,而LY6D则无统计学差异。这4个基因表达水平与其他临床指标无明显关联。 结论 CEACAM5、LY6D、MYH11及CNN1表达水平与膀胱癌相关,其中CEACAM5、MYH11及CNN1可能参与了膀胱癌肿瘤侵袭过程。

     

    Abstract: Objective To screen bladder cancer related genes and analyze the correlation between the related genes and clinical features of patients with bladder cancer. Methods The gene expression in bladder cancer tissue and adjacent normal tissue were detected using gene chip assay. The genes with different expression in cancer tissue compared with adjacent tissue were selected and verified in 34 bladder cancer patients using q-PCR. The correlation of these genes with clinical features of bladder cancer patients were analyzed. Results Total of 6 526 genes were found to be differently expressed in cancer tissue compared with adjacent tissue by gene chip assay. Twelve genes with greater differences were chosen for further identification in 34 samples. The expressions of four genes (CEACAM5, MYH11, CNN1 and LY6D) were found to be consistent with the results of gene chip assay. In the further investigation, we found that the levels of CEACAM5, MYH11 and CNN1 were significantly different between MIBC (muscle invasive bladder cancer) and NMIBC (non-muscle invasive bladder cancer). However, the level of LY6D in MIBC didn't differ with NMIBC. Meanwhile, the correlation of genes with other clinical features was not observed. Conclusion We reveals four genes related with bladder cancer in this study, and three of them (CEACAM5, MYH11 and CNN1) may involved in tumor invasion.

     

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