Comparison of Expression of Carcinogenesis-related Molecular Markers in the Patients With Colon Cancer and Polyp
Overview
- Phase
- Not Applicable
- Intervention
- Colorectal cancer group
- Conditions
- Colorectal Cancer
- Sponsor
- Seoul National University Bundang Hospital
- Enrollment
- 582
- Locations
- 2
- Primary Endpoint
- The characteristics of carcinogenesis-related molecular markers in colorectal adenoma and CRC
- Status
- Active, not recruiting
- Last Updated
- 8 days ago
Overview
Brief Summary
A study of carcinogenesis-related molecular markers in the patients with colorectal cancer and colorectal adenoma.
Detailed Description
The chromosomal instability (CIN) pathway, the CpG island methylator phenotype (CIMP) pathway and the microsatellite instability (MSI) pathway are three major carcinogenesis pathways to colorectal cancer (CRC). In this study, the investigators aimed to investigate distinctive molecular features of carcinogenesis pathways among healthy control, colorectal adenoma, and CRC and compare their molecular progression according to patients' sex and tumor location as well as disease stage.
Investigators
Nayoung Kim
Professor
Seoul National University Bundang Hospital
Eligibility Criteria
Inclusion Criteria
- •Control group: subjects with no evidence of colorectal adenoma or colorectal cancer
- •Colorectal adenoma group: Patients with colorectal adenomas greater than or equal to 10 mm in diameter according to the endoscopic presentation as well as histological validation of colorectal adenoma.
- •Colorectal cancer group: Patients whose biopsy specimen is histologically confirmed as colorectal adenocarcinoma
Exclusion Criteria
- •Subjects age under 18 years
- •Previous history of colorectal neoplasms
- •Patients with high bleeding risk or patients who must maintain anti-coagulant or anti-platelet agents
- •Denial to participate in this study
Arms & Interventions
Colorectal cancer group
Patients who are diagnosed with colorectal cancer
Control group
Patients who are not diagnosed with colorectal adenoma or colorectal cancer
Colorectal adenoma group
Patients who are diagnosed with colorectal adenoma
Outcomes
Primary Outcomes
The characteristics of carcinogenesis-related molecular markers in colorectal adenoma and CRC
Time Frame: through study completion, an average of 1 year
Using endoscopically biopsied specimens, multiple carcinogenic markers were investigated including KRAS and BRAF mutation, PD-L1, EGFR, IL-1b, NLRP3, Caspase-1, p53 expression, Microinstability (MSS, MSI-L, MSI-H), PD-L1, DNA mismatch repair proteins (MLH1, MSH2, MSH6, PMS2), CIMP markers (p16, MINT1, MINT2, MINT31, hMLH1), promoter methylation of p16, RUNX3, NEUROG1. CIMP was assessed by methylation-specific PCR for five methylation panel markers (p16, MINT1, MINT2, MINT31, hMLH1), and MSI status was validated by PCR using five NCI markers (BAT-26, BAT-25, D5S346, D17S250, and S2S123). KRAS and BRAF mutation was analyzed by direct sequencing using sequence-specific primers from the acquired biopsy specimens. PD-L1, EGFR, MMR expression was examined using immunohistochemistry.
Fecal microbiota analysis in patients with colorectal adenoma and CRC
Time Frame: through study completion, an average of 1 year
Using next-generation sequencing technique, fecal microbiota of patients with colorectal adenoma and CRC as well as healthy control was evaluated to verify carcinogenesis-related microbiota.