Clin Gastroenterology H: 胰液中的甲基化DNA水平可以将胰腺癌患者与健康患者区分开

2020-02-23 不详 MedSci原创

胰腺癌的癌前病变都出现在导管上皮中,掉落到胰液中的标记物可用于检测高度不典型增生(HGD)和癌症。胰腺组织中特定的甲基化DNA序列与腺癌有关。本项研究分析了伴有HGD的胰腺导管腺癌(PDAC)或导管内乳头状黏液性肿瘤(IPMN)患者的胰腺汁液样本中的这些甲基化DNA标记(MDM),并评估了它们将这些患者与没有发育异常或伴有异型增生的患者区别开的能力。

背景与目标
胰腺癌的癌前病变都出现在导管上皮中,掉落到胰液中的标记物可用于检测高度不典型增生(HGD)和癌症。胰腺组织中特定的甲基化DNA序列与腺癌有关。本项研究分析了伴有HGD的胰腺导管腺癌(PDAC)或导管内乳头状黏液性肿瘤(IPMN)患者的胰腺汁液样本中的这些甲基化DNA标记(MDM),并评估了它们将这些患者与没有发育异常或伴有异型增生的患者区别开的能力。

方法
研究人员从38例患者(其中35例经活检证实的PDAC或胰腺囊性病变伴浸润性癌,3例伴HGD)和73例对照(32例胰腺正常,41例良性疾病)中获得了胰液样本,这些样本是在促胰液素给药后从十二指肠内镜收集。分析样品中14种MDM的存在(在基因NDRG4,BMP3,TBX15,C13orf18,PRKCB,CLEC11A,CD1D,ELMO1,IGF2BP1,RYR2,ADCY1,FER1L4,EMX1和LRRC4),通过定量等位基因特有的实时目标和信号放大。研究人员在接收器工作特征曲线分析下进行面积测定,以确定每种标记物和标记物组的能力,以区分HGD和癌症患者与对照组。MDM组合在一起,形成了一个使用递归分区树进行检测的面板。

结果
研究人员在胰液中鉴定出一组3个MDM(分别位于C13orf18,FER1L4和BMP3),以区分病例与对照组,受试者的工作特征值低于0.90(95%CI,0.83-0.97)。使用86%的特异性截止值,该组MDM将具有任何阶段性胰腺癌的患者与具有83%敏感性(95%CI,66%–93%)的对照区分开,并鉴定出患有I或II期PDAC或具有HGD的IPMN具有80%的灵敏度(95%CI,56%–95%)。

结论
本项研究在胰腺液中开发出一组3个MDM,它们识别出胰腺癌患者的受试者工作特征值小于0.90的区域,包括患有早期疾病或晚期癌症的患者。

原始出处:
Shounak Majumder. Et al. Methylated DNA in Pancreatic Juice Distinguishes Patients With Pancreatic Cancer From Controls. Clinical Gastroenterology Hepatology. 2020.

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    2020-08-24 wgx306
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    2020-09-30 许安
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