硫酸类肝素蛋白多糖基因遗传变异与食管鳞癌放疗患者放射性食管炎发生风险的相关性  被引量:4

Genetic variation in SDC2 is associated with the risk of radiation esophagitis in patients with esophageal squamous cell carcinoma receiving radiotherapy

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作  者:张萌[1] 章文成[2] 杜忠礼 李洪敏[1] 黄莹[1] 于典科[1] 谭立君[2] 林东昕[1] 肖泽芬[2] 谭文[1] 

机构地区:[1]北京协和医学院中国医学科学院肿瘤医院病因及癌变研究室癌发生及预防分子机理北京市重点实验室,100021 [2]北京协和医学院放疗科,100021

出  处:《中华肿瘤杂志》2015年第6期422-426,共5页Chinese Journal of Oncology

基  金:国家自然科学基金(81071698);北京市优秀博士学位论文指导教师科技项目(YB20121002301)

摘  要:目的:探讨硫酸类肝素蛋白多糖( SDC2)基因遗传变异与接受单纯放疗的食管鳞癌患者总生存时间和放射性食管炎发生风险的关系。方法应用Sequenom Mass ARRAY平台检测296例接受单纯放疗的食管鳞癌患者SDC2基因功能区11个标签SNP位点的基因型,并分析其与患者总生存时间和放射性食管炎发生风险之间的关系。以非条件Logistic回归模型计算各基因型校正性别、年龄、肿瘤部位、肿瘤分期、放疗方式、总放疗剂量后的OR及其95%CI,以Cox比例风险回归模型计算HR及其95%CI。结果截至2014年6月,全组死亡260例(87.8%),生存36例。全组患者的中位生存时间为14个月。生存分析的结果显示,Ⅱ期和Ⅳ期患者的中位生存时间分别为19和10个月,Ⅳ期患者的预后比Ⅱ期患者差,HR为1.97(95%CI为1.34~2.89,P<0.001);总放疗剂量≥60 Gy和<60 Gy患者的中位生存时间分别为17和10个月,总放疗剂量≥60 Gy患者的预后较好,HR为0.64(95%CI为0.49~0.84,P=0.001)。与携带rs61599409 C等位基因患者比较,携带T等位基因患者的死亡风险有降低的趋势,校正HR为0.82(95%CI为0.66~1.02),但差异无统计学意义(P=0.071)。未发现其他10个标签SNP位点与食管鳞癌患者放疗后的总生存时间相关。296例患者中,发生放射性食管炎160例,其中1级80例,2级66例,3级14例。位于SDC2基因3′非翻译区rs17788084位点与放射性食管炎的发生显著相关,与携带AA基因型比较,携带AT或TT基因型的患者发生放射性食管炎的风险显著降低(OR为0.48,95%CI为0.28~0.85,P=0.011)。结论 SDC2 rs17788084遗传变异是影响食管鳞癌患者放疗副反应差异的重要因素,具有成为食管鳞癌个体化放射性损伤标志物的潜在应用价值。model. Results The median survival time (MST) of these patients was 14 months. Of them, 260 (87.8%) had died until the last date of follow-up of 30 June, 2014. Clinical stage ( stage Ⅳ vs. stage Ⅱ) and total radiation dose (≥ 60 Gy vs. 〈60 Gy) influence the overall survival time of the patient significantly. Cox proportional hazards regression model analysis showed that the subjects with rs61599409 T allele had an decreased hazard ratio as compared with those with C allele ( adjusted HR=0.82, 95% CI, 0.66-1.02) , but the difference was not statistically significant ( P=0.071) . The rest 10 htSNPs were not associated with the overall survival of ESCC patients treated with radiotherapy. Among this set of patients, 160 ( 54. 1%) suffered from radiation esophagitis. We found that rs17788084 A〉T SNP in the 3′-untranslational region of SDC2 was associated with esophagitis risk, with the OR being 0.48 (95% CI=0.28-0.85, P=0.011) for the TA or TT genotype compared with the AA genotype. Conclusions These results suggest that rs17788084 genetic variation in SDC2 is associated with risk of radiation esophagitis and might serve as a potential biomarker for personalized radiotherapy of ESCC.

关 键 词:食管肿瘤 多态性 单核苷酸 硫酸类肝素蛋白多糖 放射疗法 放射性食管炎 SDC2 

分 类 号:R735.1[医药卫生—肿瘤]

 

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