Expression of a novel CNPY2 isoform in colorectal cancer and its association with oncologic prognosis.

Expression of a novel CNPY2 isoform in colorectal cancer and its association with oncologic prognosis.
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DOI:
10.18632/aging.101324
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发表时间:
2017-11-13
期刊:
Aging
影响因子:
--
通讯作者:
Fang Y
Fang Y
中科院分区:
其他
文献类型:
--
作者:
Peng J;Ou Q;Guo J;Pan Z;Zhang R;Wu X;Zhao Y;Deng Y;Li C;Wang F;Li L;Chen G;Lu Z;Ding P;Wan D;Fang Y

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结直肠癌(CRC)是癌症相关死亡的主要原因。最近,我们鉴定了一种新的生物标志物,冠层成纤维细胞生长因子信号调节因子2(CNPY2)亚型2,并随后研究了其在CRC患者中的表达和预后价值。我们最初生成了 CNPY2 isoform2 单克隆抗体,并使用定量实时聚合酶链反应、蛋白质印迹和免疫组织化学分析检查了 CRC 细胞系和组织中的 CNPY2 isoform2 表达。我们发现,与正常结肠上皮细胞和肿瘤邻近正常组织相比,肿瘤细胞系和组织中 CNPY2 isoform2 的表达显着增加。生存分析表明,CNPY2 isoform2 低表达的患者在训练队列(41.7% vs. 77.7%,P = 0.007)和验证队列(47.1% vs. 78.8%,P = 0.002)中的 5 年总生存率 (OS) 较差。在多变量分析中,CNPY2 isoform2 被确定为两个训练队列中 5 年 OS 的预测因子 [风险比 (HR) = 5.001; 95% 置信区间 (CI) 2.156–11.598,P < 0.001)和验证队列(HR= 2.443;95% CI 1.197-4.983,P = 0.014)。总之,CNPY2 isoform2 是 CRC 患者一种新颖且有价值的预后指标,而 CNPY2 的肿瘤功能需要进一步研究。
Colorectal cancer (CRC) is a leading cause of cancer-related mortality. Recently, we identified a novel biomarker, canopy fibroblast growth factor signaling regulator 2 (CNPY2) isoform2, and subsequently investigated its expression and prognostic value in CRC patients. We initially generated CNPY2 isoform2 monoclonal antibodies and examined CNPY2 isoform2 expression in CRC cell lines and tissues using quantitative real-time polymerase chain reaction, western blot and immunohistochemistry analyses. We found that CNPY2 isoform2 expression significantly increased in tumor cell lines and tissues compared with that in normal colon epithelial cells and tumor-adjacent normal tissues. Survival analysis indicated that patients with low CNPY2 isoform2 expression had poorer 5-year overall survival (OS) in both the training cohort (41.7% vs. 77.7%, P = 0.007) and validation cohort (47.1% vs. 78.8%, P = 0.002). In multivariable analysis, CNPY2 isoform2 was identified as a predictor of 5-year OS in both the training cohort [hazard ratio (HR) = 5.001; 95% confidence interval (CI) 2.156–11.598, P < 0.001) and validation cohort (HR= 2.443; 95% CI 1.197- 4.983, P = 0.014). In conclusion, CNPY2 isoform2 represents as a novel and valuable prognostic indicator for CRC patients, while the oncologic function of CNPY2 requires further study.
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