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Impact of Dietary Fiber Supplementation on Colonic Mucosal Microbiome

Impact of Dietary Fiber Supplementation on Colonic Mucosal Microbiome

Recruiting
18 years and older
All
Phase N/A

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Overview

This clinical trial tests whether daily fiber supplementation will change the mucosal microbiome of the colon. The microbiome are microorganisms that live in the human gut. They serve a vital role in maintaining health. Certain microbial strains are associated with the growth of colon polyps, which eventually could go on to form colon cancer. Giving dietary fiber supplements may help prevent precancerous polyps from ever developing.

Description

PRIMARY OBJECTIVE:

I. To identify how diet, specifically fiber supplementation, alters the microbiome of the colonic mucosa.

OUTLINE

Patients receive dietary fiber orally (PO) on study. Patients undergo proctoscopy or anoscopy with biopsy on study and during follow-up.

Eligibility

Inclusion Criteria:

  • Age >= 18 years
  • Ability to understand and the willingness to sign a written informed consent document
  • Patients who present with a chief complaint of a benign anorectal pathology including hemorrhoids, anal fissures, and anal fistulas without underlying conditions such as cancer or Crohn's disease
  • Patients who had a colonoscopy within the past 2 years

Exclusion Criteria:

  • Patients with an active malignancy, Crohn's disease, ulcerative colitis, and immunosuppressed patients.
  • Patients with hereditary colon cancer syndrome including Lynch syndrome or Familial Adenomatous Polyposis (FAP)
  • Patients with a prior history of total or partial colon resection.
  • Colorectal pathology such as polyps or cancer

Study details
    Benign Colorectal Neoplasm
    Non-Neoplastic Anal Disorder

NCT05643859

OHSU Knight Cancer Institute

14 October 2025

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A clinical trial is a study designed to test specific interventions or treatments' effectiveness and safety, paving the way for new, innovative healthcare solutions.

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