全外显子测序pNO胸段食管鳞癌术后复发的研究
发布时间:2018-04-04 23:11
本文选题:食管鳞癌 切入点:pT1b-4aN0M0 出处:《上海交通大学》2015年博士论文
【摘要】:pN0食管鳞癌患者术后有30%~50%在5年内复发,依据肿瘤TNM分期预测预后缺乏敏感性与准确性,探索预测pN0食管鳞癌术后复发的分子生物学标志物,具有临床重要意义。本课题包括以下二部分:1.全外显子测序食管鳞癌淋巴结转移相关基因突变研究目的:筛选与食管鳞癌淋巴结转移密切相关的基因突变。方法:取2例食管鳞癌患者原发肿瘤、转移淋巴结、正常食管组织进行全外显子组测序,并进行Sanger扩大验证。结果:筛选出原发肿瘤及转移淋巴结中存在而正常食管组织中不存在的2个基因2个杂合突变位点:CXCR1上的c.251CT(p.A84V)和PABPC1上的c.1672CG(p.Q558E),经预测软件分析这2个突变位点都是高致病性的。结论:CXCR1上的c.251CT(p.A84V)和PABPC1上的c.1672CG(p.Q558E)2个杂合突变位点可能是食管鳞癌淋巴结转移的新的致病突变。2.p N0胸段食管鳞癌术后复发及生存相关因素研究目的:探索pN0食管鳞癌术后复发及生存相关因素。方法:检测112例pT1b-4aN0M0胸段食管鳞癌原发肿瘤中CXCR1、PABPC1的突变情况,用Logistic及COX回归等方法分析临床病理学因素及突变基因与术后复发及生存的关系。结果:17例患者检测到CXCR1突变,其中11例患者发生术后复发;8例患者检测到PABPC1突变,4例患者发生术后复发。Logistic多因素分析发现CXCR1突变、肿瘤分化程度、病变长度、肿瘤部位显著影响术后总体复发,CXCR1突变、肿瘤分化程度显著影响术后局部区域性复发,病理分期显著影响术后远处转移;COX多因素分析发现肿瘤分化程度、病变长度、年龄显著影响术后无瘤生存(disease-free survival,DFS),T分期、CXCR1突变、肿瘤分化程度、年龄、肿瘤部位显著影响术后总体生存(overall survival,OS);PABPC1不影响pT1b-4aN0M0食管鳞癌术后复发。结论:1)CXCR1突变与pT1b-4aN0M0食管鳞癌术后复发、生存密切相关,CXCR1突变可能是pT1b-4aN0M0食管鳞癌术后淋巴结转移的致病基因;2)CXCR1突变、肿瘤分化程度、病变长度、肿瘤部位是pT1b-4aN0M0食管鳞癌术后总体复发的独立预测因素;3)CXCR1突变、肿瘤分化程度是术后局部区域性复发的独立预测因素,病理分期是术后远处转移的独立预测因素,我们推测pT1b-4aN0M0食管鳞癌术后局部区域性复发和远处转移具有不同的路径;4)CXCR1突变、T分期、肿瘤分化程度、年龄、肿瘤部位是术后OS的独立预后因素,肿瘤分化程度、病变长度、年龄是术后DFS的独立预后因素。
[Abstract]:30% of patients with pN0 esophageal squamous cell carcinoma recurred within 5 years after operation. It is of great clinical significance to explore molecular biomarkers for predicting recurrence of pN0 esophageal squamous cell carcinoma by TNM stage.This topic includes the following two parts: 1.Study on mutation of lymph Node Metastasis-associated genes in esophageal squamous Cell carcinoma by Total Exon sequencing objective: to screen gene mutations closely related to lymph node metastasis of esophageal squamous cell carcinoma.Methods: two patients with esophageal squamous cell carcinoma were selected and the metastatic lymph nodes and normal esophageal tissues were sequenced and verified by Sanger.Results: two heterozygous loci were screened in primary tumors and metastatic lymph nodes but not in normal esophageal tissues. Two heterozygous loci (c.251CTA p.A84V) and c.1672CGp.Q558EN on PABPC1 were selected. The two mutation sites were highly pathogenicity by predictive software analysis.缁撹:CXCR1涓婄殑c.251CT(p.A84V)鍜孭ABPC1涓婄殑c.1672CG(p.Q558E)2涓潅鍚堢獊鍙樹綅鐐瑰彲鑳芥槸椋熺槌炵檶娣嬪反缁撹浆绉荤殑鏂扮殑鑷寸梾绐佸彉.2.p N0鑳告椋熺槌炵檶鏈悗澶嶅彂鍙婄敓瀛樼浉鍏冲洜绱犵爺绌剁洰鐨,
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