Gut:代谢物生物学标志物可以鉴别胰腺导管腺癌与慢性胰腺炎

2017-02-21 xing.T MedSci原创

CP患者发生胰腺癌的风险增加(累积发病率为1.95%),这种生物学标志物的阴性预测值分别为99.9%(95%可信区间为99.7%-99.9%)(训练集)和99.8%(95%可信区间为99.6%-99.9%)(测试集)。在三分之一的患者中,这种生物学标记的临床应用相比于CA19-9将改善诊断和治疗分层。

目前非侵入性诊断检查手段只能将三分之二的胰腺癌(胰腺导管腺癌(PDAC))和慢性胰腺炎(CP)患者进行区分。近日,消化病领域权威杂志Gut上发表了一篇研究文章,研究人员旨在寻找血液来源的代谢产物生物学标志物用于此诊断目的。

在3个三级转诊中心进行了一项病例对照研究,914名受试者被前瞻性地招募入研究,其中PDAC(n=271)、CP(n=282)、肝硬化(n=100)或健康以及非胰腺疾病对照者(n=261)。血浆代谢组学研究和血清样品来自于经气相色谱质谱和液相色谱串联质谱确定的477个代谢产物。

研究人员确定了用于鉴别PDAC和CP的生物学标志物(九代谢产物以及CA19-9)。研究人员发现在训练集中用于鉴别PDAC和CP的生物学标志物的曲线下面积(AUC)为0.96(95%可信区间为0.93-0.98)。生物学标志物将特异性固定为85%的临界值为0.384,其敏感性为94.9%(95%可信区间为87%-97%)。在测试集中,其曲线下面积为0.94(95%可信区间为0.91-0.97),采用相同的临界值,其敏感性为89.9%(95%可信区间为81%-95.5%),特异性为91.3%(95%可信区间为82.8%-96.4%),成功地验证了生物学标志物。

CP患者发生胰腺癌的风险增加(累积发病率为1.95%),这种生物学标志物的阴性预测值分别为99.9%(95%可信区间为99.7%-99.9%)(训练集)和99.8%(95%可信区间为99.6%-99.9%)(测试集)。在三分之一的患者中,这种生物学标记的临床应用相比于CA19-9将改善诊断和治疗分层。

原始出处:

Julia Mayerle, et al. Metabolic biomarker signature to differentiate pancreatic ductal adenocarcinoma from chronic pancreatitis. Gut. 2017.  http://gut.bmj.com/content/early/2017/01/20/gutjnl-2016-312432

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