Volume 131, Issue 5 pp. 1153-1157
Early Detection and Diagnosis

DNA methylation patterns in blood of patients with colorectal cancer and adenomatous colorectal polyps

Elisa Cassinotti

Elisa Cassinotti

Department of Surgical Sciences, Minimally Invasive Surgery Research Center, University of Insubria, Varese, Italy

Elisa Cassinotti and Joshua Melson contributed equally to this work.

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Joshua Melson

Joshua Melson

Division of Gastroenterology, Department of Medicine, Rush University Medical Center, Chicago, IL

Elisa Cassinotti and Joshua Melson contributed equally to this work.

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Thomas Liggett

Thomas Liggett

Department of Neurological Sciences, Multiple Sclerosis Center, Rush University Medical Center, Chicago, IL

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Anatoliy Melnikov

Anatoliy Melnikov

Department of Radiation Oncology, Rush University Medical Center, Chicago, IL

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Qilong Yi

Qilong Yi

ScienceDocs, Inc, Portland, OR

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Charles Replogle

Charles Replogle

ScienceDocs, Inc, Portland, OR

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Sohrab Mobarhan

Sohrab Mobarhan

Division of Gastroenterology, Department of Medicine, Rush University Medical Center, Chicago, IL

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Luigi Boni

Luigi Boni

Department of Surgical Sciences, Minimally Invasive Surgery Research Center, University of Insubria, Varese, Italy

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Sergio Segato

Sergio Segato

Department of Gastroenterology, Azienda Ospedaliero Universitaria, Fondazione Macchi di Varese, Varese, Italy

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Victor Levenson

Corresponding Author

Victor Levenson

Department of Radiation Oncology, Rush University Medical Center, Chicago, IL

Tel: 312-942-0555

Rush University Medical Center, Department of Radiation Oncology, 1750 W. Harrison Street, Jelke Bldg, 1303, Chicago, IL 60612Search for more papers by this author
First published: 23 October 2011
Citations: 71

Abstract

Colorectal cancer (CRC) screening rates are currently suboptimal. Blood-based screening could improve rates of earlier detection for CRC and adenomatous colorectal polyps. In this study, we evaluated the feasibility of plasma-based detection of early CRC and adenomatous polyps using array-mediated analysis methylation profiling of 56 genes implicated in carcinogenesis. Methylation of 56 genes in patients with Stages I and II CRC (N = 30) and those with adenomatous polyps (N = 30) were compared with individuals who underwent colonoscopy and were found to have neither adenomatous changes nor CRC. Composite biomarkers were developed for adenomatous polyps and CRC, and their sensitivity and specificity was estimated using five-fold cross validation. Six promoters (CYCD2, HIC1, PAX 5, RASSF1A, RB1 and SRBC) were selected for the biomarker, which differentiated CRC patients and controls with 84% sensitivity and 68% specificity. Three promoters (HIC1, MDG1 and RASSF1A) were selected for the biomarker, which differentiated patients with adenomatous polyps and controls with sensitivity of 55% and specificity of 65%. Methylation profiling of plasma DNA can detect early CRC with significant accuracy and shows promise as a methodology to develop biomarkers for CRC screening.

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