Colorectal Omics and OfCS Proteoglycans

Recruiting

• Conditions: Colorectal Cancer; Stoma Colostomy; Diverticulitis, Colonic; Inflammatory Bowel Diseases
• Interventions: Procedure: Colorectal resection or stoma closure

• Registration Number: NCT06287671
• Lead Sponsor: Claus Anders Bertelsen, PhD, MD

Brief Summary

This observational study aims to test proteomics, metabolomics and proteoglycans as predictors of postoperative complications after colorectal surgery and as biomarkers of colorectal cancer.

The main questions to answer are:

* can these biomarkers predict anastomotic leakages

* can these biomarkers predict recurrence after colorectal cancer

* can these biomarkers be used as diagnostic tests for colorectal cancer

* can these biomarkers be identified in the tumor

Participants will undergo elective colorectal resection or stoma closure.

Detailed Description

The prospective cohort study will include 1,000 patients undergoing elective colorectal resections or colostomy reversal at two colorectal centers in Denmark. Repeating study blood samples will be collected on each postoperative day (POD) 1-4 or until discharge. If the participants are diagnosed with cancer, blood sampling is planned 26-35 days after the index procedure, and after one, two, and three years, a tumor biopsy will be taken from the fresh specimen in the operation theatre.

Analyses of blood plasma and tissue for oncofetal chondroitin sulfate (ofCS) proteoglycans, proteomics, and metabolomics will be performed on those repeating blood samplings to:

* To investigate whether metabolomics, proteomics, and ofCS techniques can identify new biomarkers where charges in plasma levels can predict or detect subclinical AL (primary outcome) and other major postoperative complications after colorectal surgery and prediction of 90-day and three-year mortality.

* To investigate whether the APOE genotype is associated with the risk of AL and other major postoperative complications and long-term outcomes, i.e., recurrence and mortality, after colorectal surgery.

* To examine whether metabolomics and proteomics can identify new biomarkers predicting recurrence after colorectal cancer resections.

* To identify other potential biomarkers that might enable early cancer diagnosis.

* Whether proteoglycans can be used as a diagnostic test with a high degree of separability to identify tumor markers that are usable in a clinical setting (primary outcome). Participants with colorectal cancer will be compared with a control group of participants with benign conditions.

* Whether the level of proteoglycans measured correlates to the tumor load.

* Whether the proteoglycans and proteomics detected in plasma are presented in tumor tissue from the resected specimen.

* Whether the proteoglycans detected can be used as tumor markers with a high degree or measure of separability for monitoring recurrence after colorectal cancer in a clinical setting (primary outcome).

Postoperative and follow-up data will be collected prospectively for the electronic health records.

Study Timeline

• Study First Submitted: 2024-02-22
• Study First Submitted QC: 2024-02-29
• Study First Posted: 2024-03-01
• Study Start: 2024-10-08
• Status Verified: 2024-12
• Last Update Submitted: 2024-12-25
• Last Update Posted: 2024-12-30
• Primary Completion: 2028-12-31
• Study Completion: 2032-12-31

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 1000

Inclusion Criteria

• Patients diagnosed or with suspicion of colorectal cancer or adenoma, inflammatory bowel disease, late complications to colon diverticulosis, colostomy reversal or other diagnoses requiring colorectal resection.
• Patients planned to undergo elective surgical procedures coded as KJFB20-KJFB99, KJFG30-37 or KJGB00-97 according to the Danish modification of the NOMESCO Classification of Surgical Procedures
• Able to speak Danish, English, or other languages where professional interpretation is available
• Able to give informed consent

Exclusion Criteria

• Patients undergoing synchronous: liver resection (patients undergoing metastasectomies can be included); total gastrectomy or cardia resection; Whipple's procedure or another major pancreatic resection (resections of the pancreatic tail can be included); total or partial nephrectomies or cystectomy
• Patients previously included in the study
• Patients known to be pregnant (pregnancy test not required)
• Non-resident in Denmark

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Study cohort	Colorectal resection or stoma closure	Patients undergoing elective colorectal resection or stoma closure

Primary Outcome Measures

Name	Time	Method
Recurrence after colorectal cancer	4 years	Recurrence after radical resection, diagnosed by imaging modalities or tissue biopsy
Rate of anastomotic leakage diagnosed by CT-scan or reoperation	30 days	Anastomotic leakage after colorectal resection with anastomosis or stoma closure
Rate of major postoperative complications	30 days	Major postoperative complication (Clavien-Dindo score 3B or higher, and DVT and pulmonary embolism) after colorectal resection with anastomosis or stoma closure
Diagnostic value of omics and other biomarkers detecting colorectal cancer	30 days	Identifying omics and chondroitin sulfate-modified proteoglycans that can be used i a clinical setting to identify colorectal cancer patients
Short-term mortality	90 days	Postoperative mortality after colorectal resection with anastomosis or stoma closure
Correlation between biomarker in plasma and tissue	30 days	Does presence of tumor markers in blood plasma correlate with the same tumor makers in the tumor tissue

Trial Locations

Locations (2)

Nordsjaellands Hospital; 🇩🇰 Hillerød, Denmark

Regionshospitalet Viborg; 🇩🇰 Viborg, Denmark