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J Zhejiang Univ (Med Sci)  2018, Vol. 47 Issue (2): 143-149    DOI: 10.3785/j.issn.1008-9292.2018.04.06
    
Association of UCP2 rs659366 polymorphisms with the outcomes of patients after surgery for colorectal cancer
JIANG Yanqi1(),YANG Yalan1,YANG Ting1,LI Yueling2,CHEN Liling3,YAN Jin4,YANG Yanfang1,*()
1. Department of Epidemiology and Biostatistics, West China School of Public Health, Sichuan University, Chengdu 610041, China
2. Department of Infectious Disease Control and Prevention, Chengdu Center for Disease Control and Prevention, Chengdu 610041, China
3. Institute for Chronic Non-communicable Disease Control and Prevention, Chongqing Center for Disease Control and Prevention, Chongqing 400042, China
4. Department of Intestinal Surgery, Sichuan Cancer Hospital, Chengdu 610041, China
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Abstract  

Objective: To explore the association between UCP2 rs659366 polymorphisms and the outcomes of patients after surgery for colorectal cancer. Methods: The study was conducted among a cohort of 501 patients with primary colorectal cancer who had surgery in Sichuan Cancer Hospital during March 2010 and July 2013. The outcomes of the patients were followed up. The polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method was applied to detect UPC2 rs659366 genotypes. The log-rank test was performed to analyze the effects of clinical features on patients' outcomes. The correlation between UCP2 rs659366 polymorphisms and the outcomes of patients was analyzed using the Cox proportional hazard model. Results: In this study, the median of follow-up time was 44.23(0.13-78.53)months, and 101 out of 501 (20.2%) patients failed to follow-up. The log-rank test showed the tumor site, TNM stage, vascular invasion, perineural invasion and the preoperative carcino-embryonic antigen(CEA) level were significantly associated with the outcome of colorectal cancer (P < 0.05 or P < 0.01). The overall survival rate of patients with AA, GA and GG genotypes were 62.7%, 69.9% and 75.5%, respectively. Multivariate analysis according to Cox proportional hazard model taking the GG genotype as the reference indicated that the AA genotype increased risks for survival of patients (HR=1.823); under the dominant genetic model taking GG genotype as reference, GA+AA genotypes increased risks for the poorer outcomes of patients (HR=1.498); the addictive genetic model showed that allele A increased the hazard for the poorer outcomes (HR=1.787). Conclusion: The UCP2 rs659366 polymorphisms are significantly associated with the outcome of patients with colorectal cancer.



Key wordsColorectal neoplasms/surgery      Postoperative period      Mitochondrial membrane transport proteins      Polymorphism, single nucleotide      Genotype      Prognosis     
Received: 20 January 2018      Published: 24 July 2018
CLC:  R735.3  
Corresponding Authors: YANG Yanfang     E-mail: fraualice77@sina.com;yang2009@scu.edu.cn
Cite this article:

JIANG Yanqi,YANG Yalan,YANG Ting,LI Yueling,CHEN Liling,YAN Jin,YANG Yanfang. Association of UCP2 rs659366 polymorphisms with the outcomes of patients after surgery for colorectal cancer. J Zhejiang Univ (Med Sci), 2018, 47(2): 143-149.

URL:

http://www.zjujournals.com/med/10.3785/j.issn.1008-9292.2018.04.06     OR     http://www.zjujournals.com/med/Y2018/V47/I2/143


UCP2 rs659366位点多态性与结直肠癌术后患者生存结局的关系

目的: 探讨UCP2 rs659366位点多态性与结直肠癌术后患者生存结局的关系。方法: 选择2010年3月至2013年7月于四川省肿瘤医院肠道外科行手术治疗且资料完整的原发性结直肠癌患者501例,随访术后生存结局。采用限制性片断长度多态性PCR检测UCP2 rs659366位点的基因多态性。采用log-rank检验分析患者主要临床特征对生存结局的影响;采用Cox比例风险回归模型分析UCP2 rs659366位点基因多态性与患者生存结局之间的相关性。结果: 本研究中位随访时间为44.23(0.13~78.53)个月,501例结直肠癌患者中101例失访,失访率为20.2%。log-rank检验结果显示,肿瘤部位、TNM分期、脉管侵犯、神经侵犯、术前癌胚抗原水平与结直肠癌患者的生存结局相关(P < 0.05或P < 0.01)。UCP2 rs659366位点AA、GA和GG基因型结直肠癌患者的存活率分别为62.7%、69.9%和75.5%。多因素Cox比例风险回归模型分析结果显示:共显性遗传模型中UCP2 rs659366位点AA基因型是结直肠癌患者生存结局的危险基因型,其不良生存结局的风险是GG基因型的1.823倍;显性遗传模型中UCP2 rs659366位点GG+GA基因型与结直肠癌患者生存结局有关,其不良生存结局的风险是GG基因型的1.498倍;在加性遗传模型中,UCP2 rs659366位点GA基因型患者不良生存结局的风险是GG基因型患者的1.787倍,而AA基因型患者不良生存结局的风险是GA基因型患者的1.787倍。结论: UCP2 rs659366位点基因多态性可能是影响结直肠癌术后患者生存结局的因素。


关键词: 结直肠肿瘤/外科学,  手术后期间,  线粒体膜转运蛋白质类,  多态性, 单核苷酸,  基因型,  预后 
[n(%)]
临床特征 n 存活
log-rank检验,*P<0.05,**P<0.01.
性别 225 159(70.7)
175 123(70.3)
年龄段(岁) <40 30 19(63.3)
40~<60 187 131(70.1)
≥60 183 132(72.1)
肿瘤部位* 结肠 147 95(64.6)
直肠 253 187(73.9)
细胞分级 低级别 324 234(72.2)
高级别 76 48(63.2)
TNM分期** 63 53(84.1)
124 109(87.9)
153 110(71.9)
60 10(16.7)
脉管侵犯** 52 29(55.8)
348 253(72.7)
神经侵犯** 43 22(51.2)
357 260(72.8)
术前癌胚抗原水平 ≤5 260 201(77.3)
(ng/mL)** >5 140 81(57.9)
术后辅助治疗 333 237(71.2)
67 45(67.2)
手术类型 开腹手术 376 261(69.4)
腹腔镜 24 21(87.5)
Tab 1 Association of clinical features with the outcomes of patients after surgery for colorectal cancer
Fig 1 Agarose gel electrophoresis of the MluⅠenzyme products of UCP2 rs659366
遗传模型 基因型 单因素Cox比例风险回归模型 多因素Cox比例风险回归模型*
HR(95%CI) P HR(95%CI) P
“—”无相关数据;*调整因素为性别、年龄、肿瘤部位、细胞分级、TNM分期、脉管侵犯、神经侵犯、术前癌胚抗原水平、术后是否辅助治疗和手术类型.
共显性 GG 1.000 1.000
GA 1.293(0.844~1.980) >0.05 1.382(0.900~2.122) >0.05
AA 1.683(1.020~2.776) <0.05 1.823(1.094~3.037) <0.05
显性 GG 1.000 1.000
GA+AA 1.401(0.941~2.087) >0.05 1.498(1.002~2.240) <0.05
隐性 GG+GA 1.000 1.000
AA 1.445(0.946~2.210) >0.05 1.503(0.976~2.314) >0.05
超显性 GG+AA 1.000 1.000
GA 1.056(0.736~1.516) >0.05 1.099(0.765~1.580) >0.05
加性 1.686(1.022~2.781) <0.05 1.787(1.065~2.998) <0.05
Tab 2 Association of UCP2 rs659366 polymorphisms with the outcomes of patients after surgery for colorectal cancer
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