AP&T: 粪便中挥发性有机化合物可作为检测结直肠癌的生物标志物

2019-03-13 不详 MedSci原创

结直肠癌仍然是全世界人群中引起死亡率和发病率的重要疾病。英国肠癌筛查计划(BCSP)已经证明,早期检测结直肠癌和鉴定晚期恶变前腺瘤可降低死亡率和发病率。本项研究旨在评估挥发性有机化合物是否可以作为结肠直肠瘤形成的生物标志物的效用。

背景
直肠癌仍然是全世界人群中引起死亡率和发病率的重要疾病。英国肠癌筛查计划(BCSP)已经证明,早期检测直肠癌和鉴定晚期恶变前腺瘤可降低死亡率和发病率。本项研究旨在评估挥发性有机化合物是否可以作为结肠直肠瘤形成的生物标志物的效用。

方法
研究人员在入组患者接受结肠镜检查之前,从有症状的患者和参与英国BCSP的人中收集粪便。对粪便进行萃取,然后进行气相色谱质谱分析,以鉴定挥发性有机化合物。使用逻辑回归建模和10倍交叉验证来测试潜在的生物标志物。

结果
本项研究共纳入137名参与者(平均年龄64岁,54%为男性):60名没有肉眼可见肿瘤,56名患有腺瘤性息肉,21名患有腺癌。丙-2-醇在癌症样本中显着更丰富(P  <0.0001,q = 0.004),AUROC曲线下面积为0.76。当与3-甲基丁酸组合时,AUROC曲线为0.82,灵敏度为87.9%(95%CI为0.87-0.99),特异性为84.6%(95%CI为0.65-1.0)。使用特定挥发性有机化合物的存在/不存在的逻辑回归分析,鉴定出三种挥发性有机化合物组(丙-2-醇,己-2-酮和3-甲基 - 丁酸乙酯)具有0.73的AUROC,具有如果存在所有三种挥发性有机化合物,那么患癌症的可能性是普通人的六倍(P  <0.0001)。

结论
与其他粪便生物标志物相比,挥发性有机化合物分析对于鉴定结肠直肠腺癌可能具有更好的诊断能力。

原始出处:
Ashley Bond. Et al. Volatile organic compounds emitted from faeces as a biomarker for colorectal cancer. Alimentary Pharmacology & Therapeytics. 2019.

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    2019-03-15 Homburg
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