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Efficacy of Vitamin D in Colorectal Cancer Chemoprevention

NCT01574027 · Status: COMPLETED · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 55

Last updated 2012-04-10

No results posted yet for this study

Summary

Vitamin D's ability to prevent colorectal cancer (CRC) has been suspected for nearly 30 years, but has never been directly studied in humans. The biologically active version of vitamin D, 1,25(OH)2D3, cannot be readily used in humans because of its tendency to cause serum calcium levels to rise. In contrast, 25(OH)D3 (ie calcifediol) does not have this side effect. The investigators previous research suggests that the enzyme necessary to convert 25(OH)D3 (calcifediol) into active 1,25(OH)D3 is present in cells lining the large intestine (colon).

Aberrant crypt foci (ACF) are very small (ie microscopic) collections of abnormally shaped cells that are a commonly used marker of CRC risk. Screening colonoscopy at UIC routinely uses methods that allow ACF counting to be done as a part of standard practice. ACF's are not fixed, like polyps or cancers, but can disappear as a person's risk for developing CRC decreases.

The investigators propose giving patient's with 10 or more ACF's 25(OH)D3 (calcifediol) or placebo, and determining if there is a drug-dependant decrease in ACF number. The primary objective is to determine whether 25(OH)D3 (calcifediol) supplementation, compared to placebo, causes significant reduction of ACF number from baseline levels. The primary endpoint will be change in ACF number.

Conditions

Interventions

DRUG

Vitamin D3 (cholecalciferol)

One capsule per day for six months

DRUG

Placebo

One capsule per day for six months

Sponsors & Collaborators

  • University of Illinois at Chicago

    lead OTHER

Principal Investigators

  • Richard V Benya, M.D. · University of Illinois at Chicago

Study Design

Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
TRIPLE
Model
PARALLEL

Eligibility

Min Age
50 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2008-04-30
Primary Completion
2011-10-31
Completion
2011-10-31

Countries

  • United States

Study Locations

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Entities

Drugs
Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01574027 on ClinicalTrials.gov