- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04865601
DNA Adductomics for Colorectal Cancer Investigation (adductomics)
Novel DNA Adductomics Methodological Developments for Research in Colon Cancer
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Colorectal cancer (CRC) develops as a result of multiple genetic mutations causing normal intestinal epithelium to transform into a colorectal carcinoma. Genetic mutations may be caused by many different genetic events including chemical damage to the DNA nucleosides. These chemical modifications are due to both exogenous compounds coming from diet, environment and gut microbiota, or endogenous compounds produced by our own metabolic processes like inflammation and oxidative stress. Such genetic alteration is thought to be the starting event leading to development of sporadic CRC. However, there is little understanding on which DNA nucleoside modifications are associated with increased risk of CRC and their mechanism of action. The study of these DNA nucleoside modifications has been addressed in the recent years by a new research field, called DNA adductomics. DNA adductomics uses the new advanced high resolution mass spectrometry (HRMS) instrumentations for identifying the complexes that are formed between toxic compounds and DNA, namely DNA adducts.
Some studies have been previously identified DNA adducts in CRC with older technology. However, there is not a real evidence on which DNA adducts are related to sporadic CRC, hereditary non polyposis colorectal cancer (HNPCC) and other diseases such as familial adenomatous polyposis (FAP) which turns into CRC with a 95% risk before the age of 35. The lack of more recent human studies in DNA adductomics is mainly due to the lack of appropriate analytical methods. Developing such methods requires sufficient sample material and the amount of sample in a colon biopsy is too low to be used for method development. In this study, colon epithelial tissue obtained by resection of colon during surgery will be used for developing a more sensitive method, possibly allowing DNA adduct analysis from biopsies in future studies. In order to ascertain that the developed method can differentiate the level of DNA-adducts between inherited CRC, sporadic CRC and non-CRC subjects, also materials from other groups coming to the hospital for colon resections will be obtained. By analyzing the materials obtained in a case-control manner, we might also be able to resolve whether some of the DNA adducts differ between the different CRC cases or in comparison with cancer-free subjects. This knowledge should provide a preliminary basis for suggesting prevention and intervention approaches to reduce morbidity and mortality from CRC.
However, in case-control studies, a proper selection of the subjects should be carried out by assuring gender and age balance between the control group and the CRC group. This will be difficult in the first part of the current study since 1) there is limited possibility of obtaining resected colon from healthy subjects 2) CRC incidence rates are markedly higher in men than in women, and 3) different types of CRC develop at different ages. It is also obvious that a method relying on analyses of colon resections would have a limited application in preventive medicine. A solution to these issues may be the use of appropriate surrogate samples like blood, faeces and urine. Indeed, since DNA lesions may be removed from the genome by the DNA repair system, they are often excreted in urine, in faeces, or in blood. In order to know whether we may substitute tissues with surrogate samples, we will explore whether there is a correlation between DNA-repair product level in surrogate samples and DNA adducts in colon tissues. Substituting colon tissues with surrogates, or developing a sensitive method for DNA analysis from biopsies, would allow an easier collection of the samples, giving the possibility, in the future, of performing large and controlled clinical studies as well as less invasive sampling from patients. This could allow to confirm a causal relationship between specific DNA-adducts and CRC, providing real advances in prevention and intervention approaches.
Finally, after the identification of the DNA adducts and DNA-repair products possibly associated with CRC, it will be important to identify the real cause of DNA adducts formation. Our final purpose is therefore identifying which life-style, dietary or environmental factors are possibly associated with the DNA adducts and DNA-repair products identified in colon and surrogate samples, respectively. For this purpose, we will perform a metabolic profiling of serum, urine and faeces, a microbial profiling of faeces, and we will correlate it with basic information on patient life styles about smoking, alcohol consumption and intake of red meat, e.g. factors suspected to influence risk of colonic diseases.
Establishing a causal relationship between specific DNA-adducts and CRC or other colonic diseases, and understanding the causes for DNA adducts formation, will not only yield much richer insights into the molecular defects but will also result in advances in prevention and intervention approaches.
Study Type
Enrollment (Estimated)
Contacts and Locations
Study Contact
- Name: Lars Ove Drasted, professor
- Phone Number: +4535332694
- Email: ldra@nexs.ku.dk
Study Contact Backup
- Name: Giorgia La Barbera
- Phone Number: +4591838577
- Email: glb@nexs.ku.dk
Study Locations
-
-
Frederiksberg C
-
Copenhagen, Frederiksberg C, Denmark, 1958
- Recruiting
- Department of Nutrition, Exercise and Sports, University of Copenhagen
-
Contact:
- Giorgia La Barbera, Assist. Professor
- Email: glb@nexs.ku.dk
-
Contact:
- Lars O Dragsted, Professor
- Phone Number: +4535332694
- Email: ldra@nexs.ku.dk
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Sampling Method
Study Population
Description
Inclusion Criteria:
- Patients with either FAP, Lynch syndrome, other HNPCC, sporadic colorectal cancer, ulcerative colitis or other conditions who are scheduled for whole or partial resection of their colon
Exclusion Criteria:
- Any condition that makes the investigator or hospital personnel doubt that voluntary participation isfeasible.
- Patients who are not able to understand and sign the informed consent form for any reason, including lack of a sufficient period of time to consider their participation.
- Patients who are below 18 years of age.
- Patients who donated blood to a blood bank within 3 months prior to their operation.
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
CRC
Patient affected by any sporadic colorectal cancer
|
The patient scheduled for colon resectomy are included in the study
|
FAP
Patients affected by familial adenomatous polyposis coli
|
The patient scheduled for colon resectomy are included in the study
|
HNPCC
Patient affected by hereditary non polyposis colorectal cancer
|
The patient scheduled for colon resectomy are included in the study
|
Lynch
patient affected by lynch syndrome
|
The patient scheduled for colon resectomy are included in the study
|
others
Patients affected by ulcerative colitis, chron disease, diverticulitis and other colon diseases, which represent the control
|
The patient scheduled for colon resectomy are included in the study
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
DNA adductome in CRC and other diseases
Time Frame: During surgery
|
Identification of DNA adducts in colon tissue from CRC and other diseases
|
During surgery
|
Correlation of DNA adduct and DNA repair products
Time Frame: Baseline (Before surgery)
|
Correlation of DNA adduct in colon tissues and DNA repair products in surrogate samples
|
Baseline (Before surgery)
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Correlation of DNA adducts with microbiota
Time Frame: Baseline (Before surgery)
|
Correlation of DNA adduct in colon tissues with microbiota and microbiota metabolites in faeces
|
Baseline (Before surgery)
|
Correlation of DNA adducts with CRC causes
Time Frame: Baseline (Before surgery)
|
Correlation of DNA adduct in colon tissues with metabolism in serum and urine
|
Baseline (Before surgery)
|
Collaborators and Investigators
Sponsor
Collaborators
Investigators
- Principal Investigator: Lars Ove O Dragsted, PhD, University of Copenhagen
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Digestive System Diseases
- Metabolic Diseases
- Neoplasms by Histologic Type
- Neoplasms
- Neoplasms by Site
- Neoplasms, Glandular and Epithelial
- Gastrointestinal Neoplasms
- Digestive System Neoplasms
- Gastrointestinal Diseases
- Genetic Diseases, Inborn
- Colonic Diseases
- Intestinal Diseases
- Intestinal Neoplasms
- Rectal Diseases
- Neoplastic Syndromes, Hereditary
- DNA Repair-Deficiency Disorders
- Adenomatous Polyps
- Adenoma
- Intestinal Polyposis
- Colorectal Neoplasms
- Colorectal Neoplasms, Hereditary Nonpolyposis
- Adenomatous Polyposis Coli
- Colonic Neoplasms
Other Study ID Numbers
- M239
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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