Metagenomic Evaluation of the Gut Microbiome in Patients With Lynch Syndrome and Other Hereditary Colonic Polyposis Syndromes

February 3, 2026 updated by: Memorial Sloan Kettering Cancer Center
The purpose of this study is to understand the role bacteria that normally live in the colon may play in colorectal cancer risk, in addition to the hereditary risk to colorectal cancer. The investigators will collect stool specimens as well as additional colon biopsy specimens during the patient's scheduled colonoscopy procedure. The investigators will also collect a questionnaire about diet and lifestyle. The samples will be used to study the impact of diet on naturally-occurring oral and gut bacteria and their influences on human health including risk of cancer.

Study Overview

Status

Active, not recruiting

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

77

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • New York
      • New York, New York, United States, 10065
        • Memorial Sloan Kettering Cancer Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Potential research subjects will be identified prospectively within the clinics of the Clinical Genetics and Gastroenterology Services, of MSKCC.

Description

Inclusion Criteria:

  • Male or Female age 18 or older

  • Hereditary colorectal cancer syndrome with one of the following:

    • Lynch syndrome, as defined by the presence of a deleterious germline mutation in the MLH1, MSH2, MSH6, PMS2 or EPCAM genes
    • Other hereditary colonic polyposis syndromes, as defined by the presence of a deleterious germline mutation in any one of the following polyposis genes (APC, biallelic MYH, STK11, SMAD4, BMPR1A, or other CRC-risk associated genes at discretion of PI)

Exclusion Criteria:

  • Unable to provide informed consent for testing
  • Unable to complete English language questionnaire
  • Receiving active chemotherapy
  • Having completed active chemotherapy less then 12 months prior to day of scheduled lower endoscopy
  • No infectious or drug induced colitis less then 12 months prior to day of scheduled lower endoscopy
  • No history of inflammatory colitis (Crohn's disease or ulcerative colitis)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
patients having lower endoscopy
At least 2 weeks prior to scheduled lower endoscopy, consented study participants will be mailed a Brief Diet and Lifestyle Questionnaire, a stool collection kit with detailed instructions and a Stool Collection Data Sheet. No more than one week prior to the lower endoscopy but prior to initiation of bowel preparation, the consented participants will provide a stool specimen and fill out the two questionnaires. The routine lower endoscopy will be performed according to routine clinical procedures. Clinical biopsies of suspicious areas and/or lesions will be taken as per standard clinical care with all such tissue samples sent to pathology for routine clinical analysis. For the sole purposes of research, at the routine lower endoscopy, up to 8 additional colonic biopsies will be taken from normal appearing colon mucosa
Genetic: colonic biopsies
Genetic: questionnaires

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
association of the gut microbiome and dietary factors (To validate said associations, individual questions from the Brief Diet and Lifestyle Questionnaire will be primarily used in the overall analyses)
Time Frame: 2 years
with risk of adenoma or cancer in Lynch syndrome and other hereditary colonic polyposis syndrome patients. To validate said associations, individual questions from the Brief Diet and Lifestyle Questionnaire will be primarily used in the overall analyses.
2 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Memorial Sloan Kettering Cancer Center

Collaborators

Harvard University
Broad Institute of MIT and Harvard

Investigators

  • Principal Investigator: Zsofia Stadler, MD, Memorial Sloan Kettering Cancer Center

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

February 1, 2015

Primary Completion (Estimated)

February 1, 2027

Study Completion (Estimated)

February 1, 2027

Study Registration Dates

First Submitted

February 19, 2015

First Submitted That Met QC Criteria

February 24, 2015

First Posted (Estimated)

February 25, 2015

Study Record Updates

Last Update Posted (Actual)

February 5, 2026

Last Update Submitted That Met QC Criteria

February 3, 2026

Last Verified

February 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 15-016

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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