A Model for the Early Diagnosis of Colorectal Cancer by the Detection of 5-hydroxymethylcytosine (5-hmC) in Plasma Cell-free DNA

Study Overview
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Brief Summary
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In this study, the investigators establish a model for the early diagnosis of colorectal cancer based on detection of 5-hydroxymethylcytosine (5-hmC) in training group and validate the effectiveness of the model using a validation group.

Detailed Description
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Many kinds of cancers are associated with changes in epigenetics, including 5-methylcytosine (5-mC) and 5-hydroxymethylcytosine (5-hmC). This changes may help diagnose cancer. The new detection method for 5-hmC can meet the requirements of liquid biopsy. The traditional diagnostic methods for colorectal cancer is colonoscopy and pathology which are inconvenient and unpleasant, and sometimes, it is difficult for the very patients to get tissues or get enough tissues. In addition, other screening methods for colorectal cancer,such as guaiac-based fecal occult blood testing and a blood test for methylated SEPT9 DNA, have the shortcomings of relatively low sensitivity and specificity. As a result, it is imperative to find a new detection method for early diagnosis of colorectal cancer with high the advantages of high sensitivity and specificity, minimally invasive and convenient. The aim of this research study is to establish a model for the early diagnosis of colorectal cancer by the detection of 5-hmC in plasma cell-free DNA. Patients who are diagnosed with colorectal cancer by colonoscopy and pathology and not received any anti-tumor therapy (Arm A) will be eligible for inclusion as well as healthy individuals with normal colonoscopy (Arm B). Then, 5-hmC in plasma cell-free DNA will be detected and compared between the two arms of patients (training group) to establish a model to diagnosis other people (validation group) who may suffer from colorectal cancer.

Official Title
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A Single-centre, Prospective Trial of the Detection of 5-hydroxymethylcytosine (5-hmC) in Plasma Cell-free DNA for Establishing a Model for the Early Diagnosis of Colorectal Cancer

Conditions
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Colorectal Cancer

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Arm A Histologically proven colorectal adenocarcinoma No other malignancies in medical history except adequately treated basocellular carcinoma of the skin or in situ carcinoma of the cervix uteri Eastern cooperative oncology group score 0-2 Informed consent Arm B Healthy people with normal colonoscopy No other malignancies in medical history except adequately treated basocellular carcinoma of the skin or in situ carcinoma of the cervix uteri Eastern cooperative oncology group score 0-2 Informed consent Exclusion Criteria: Arm A Patients received chemoradiotherapy or other anti-tumor therapy before being enrolled Patients and/or family members can not understand and accept this study Familial Adenomatosis Polyposis, Lynch Syndrome, acute inflammatory bowel disease Pregnancy or lactation Unsuitable to take part in the clinical trial judged by doctors Arm B Pregnancy or lactation Unsuitable to take part in the clinical trial judged by doctors

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Sensitivity and specificity of the model in the diagnosis of colorectal cancer | Sensitivity and specificity of the model in the diagnosis of colorectal cancer in training group and validation group | 6-month | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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colorectal cancer, early diagnosis, 5-hydroxymethylcytosine