目的:早期发现结直肠癌(CRC)可提供更好的生存率。这项研究旨在开发一种名为SPOT-MAS(通过DNA甲基化和大小筛选肿瘤的存在)的基于血液的筛查方法,用于高精度的早期CRC检测。方法:同时分析159例非转移性CRC患者和158例健康对照的血浆无细胞DNA样本的片段长度和甲基化谱。然后,我们采用具有片段长度和甲基化特征的深度神经网络来构建分类模型。结果:该模型检测CRC的曲线下面积为0.989,灵敏度为96.8%,特异性为97%。我们模型的外部验证显示出可比的性能,曲线下面积为0.96。结论:基于癌症特异性甲基化和碎片组特征整合的SPOT-MAS可以为早期CRC检测提供高准确性。
用于早期发现结直肠癌的新型血液检测。结直肠癌是结肠或直肠癌,位于消化道的下端。早期发现结直肠癌可以帮助患有这种疾病的人有更高的生存机会和更好的生活质量。目前的筛查方法可能是侵入性的,引起不适,或准确度低;因此需要更新的筛选方法。在这项研究中,我们开发了一种新的筛选方法,叫做SPOT-MAS,它通过测量血液中癌症DNA的信号来工作。通过结合癌症DNA的不同特征,SPOT-MAS可以高精度地区分结直肠癌患者和健康个体的血液样本。
Aims: Early detection of colorectal cancer (CRC) provides substantially better survival rates. This study aimed to develop a blood-based screening assay named SPOT-MAS (\'screen for the presence of tumor by DNA methylation and size\') for early CRC detection with high accuracy. Methods: Plasma cell-free DNA samples from 159 patients with nonmetastatic CRC and 158 healthy controls were simultaneously analyzed for fragment length and methylation profiles. We then employed a deep neural network with fragment length and methylation signatures to build a classification model. Results: The model achieved an area under the curve of 0.989 and a sensitivity of 96.8% at 97% specificity in detecting CRC. External validation of our model showed comparable performance, with an area under the curve of 0.96. Conclusion: SPOT-MAS based on integration of cancer-specific methylation and fragmentomic signatures could provide high accuracy for early-stage CRC detection.
A novel blood test for early detection of colorectal cancer. Colorectal cancer is a cancer of the colon or rectum, located at the lower end of the digestive tract. The early detection of colorectal cancer can help people with the disease have a higher chance of survival and a better quality of life. Current screening methods can be invasive, cause discomfort or have low accuracy; therefore newer screening methods are needed. In this study we developed a new screening method, called SPOT-MAS, which works by measuring the signals of cancer DNA in the blood. By combining different characteristics of cancer DNA, SPOT-MAS could distinguish blood samples of people with colorectal cancer from those of healthy individuals with high accuracy.