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Multiplex screening of 275 plasma protein biomarkers to identify a signature for early detection of colorectal cancer.
Molecular Oncology ( IF 5.0 ) Pub Date : 2019-11-13 , DOI: 10.1002/1878-0261.12591
Megha Bhardwaj 1, 2 , Korbinian Weigl 3, 4 , Kaja Tikk 3, 4 , Axel Benner 5 , Petra Schrotz-King 1 , Hermann Brenner 1, 3, 4
Affiliation  

Blood-based protein biomarkers may be an attractive option for early detection of colorectal cancer (CRC). Here, we used a two-stage design to measure 275 protein markers by proximity extension assay (PEA), first in plasma samples of a discovery set consisting of 98 newly diagnosed CRC cases and 100 age- and gender-matched controls free of neoplasm at screening colonoscopy. An algorithm predicting the presence of early- or late-stage CRC was derived by least absolute shrinkage and selection operator regression with .632+ bootstrap method, and the algorithms were then validated using PEA again in an independent validation set consisting of participants of screening colonoscopy with and without CRC (n = 56 and 102, respectively). Three different signatures for all-, early-, and late-stage CRC consisting of 9, 12, and 11 protein markers were obtained in the discovery set with areas under the curves (AUCs) after .632 + bootstrap adjustment of 0.92, 0.91, and 0.96, respectively. External validation among participants of screening colonoscopy yielded AUCs of 0.76 [95% confidence interval (95% CI), 0.67-0.84], 0.75 (95% CI, 0.62-0.87), and 0.80 (95% CI, 0.68-0.89) for all-, early-, and late-stage CRC, respectively. Although the identified protein markers are not competitive with the best available stool tests, these proteins may contribute to the development of powerful blood-based tests for CRC early detection in the future.

中文翻译:

多重筛选275种血浆蛋白生物标记物,以鉴定早期检测结直肠癌的特征。

基于血液的蛋白质生物标记物可能是早期检测结直肠癌(CRC)的有吸引力的选择。在这里,我们采用了两阶段设计,通过接近延伸分析(PEA)来测量275种蛋白质标记,首先是在由98个新诊断的CRC病例以及100个年龄和性别匹配的无肿瘤对照组成的发现组的血浆样本中结肠镜检查。通过最小绝对收缩和选择算子回归,使用.632+引导方法,得出预测早期或晚期CRC的算法,然后再次使用PEA在包含结肠镜检查参与者的独立验证集中再次验证算法有和没有CRC(分别为n = 56和102)。全阶段,早期和晚期CRC的三种不同签名包括9,12,在发现集中获得了11种蛋白质标记,其.632 +自举调整分别为0.92、0.91和0.96后,曲线下面积(AUC)。结肠镜检查参与者的外部验证得出AUC为0.76 [95%置信区间(95%CI),0.67-0.84],0.75(95%CI,0.62-0.87)和0.80(95%CI,0.68-0.89)全阶段,早期和晚期CRC。尽管已鉴定的蛋白质标记物无法与最佳的粪便检测方法竞争,但这些蛋白质可能会有助于开发强大的基于血液的检测方法,以用于将来的CRC早期检测。对于全阶段,早期和晚期,分别为76 [95%置信区间(95%CI),0.67-0.84],0.75(95%CI,0.62-0.87)和0.80(95%CI,0.68-0.89) CRC,分别。尽管已鉴定的蛋白质标记物无法与最佳的粪便检测方法竞争,但这些蛋白质可能会有助于开发强大的基于血液的检测方法,以用于将来的CRC早期检测。对于全阶段,早期和晚期,分别为76 [95%置信区间(95%CI),0.67-0.84],0.75(95%CI,0.62-0.87)和0.80(95%CI,0.68-0.89) CRC,分别。尽管已鉴定的蛋白质标记物无法与最佳的粪便检测方法竞争,但这些蛋白质可能会有助于开发强大的基于血液的检测方法,以用于将来的CRC早期检测。
更新日期:2019-11-01
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