# DNA Changes That Affect Vitamin D Metabolism in Patients With Colorectal Cancer Receiving Vitamin D Supplements

> **NCT00550563** · NA · COMPLETED · sponsor: **Roswell Park Cancer Institute** · enrollment: 50 (actual)

## Conditions studied

- Colorectal Cancer

## Interventions

- **DIETARY_SUPPLEMENT:** cholecalciferol
- **GENETIC:** polymerase chain reaction
- **GENETIC:** polymorphism analysis
- **GENETIC:** protein expression analysis
- **GENETIC:** reverse transcriptase-polymerase chain reaction
- **GENETIC:** western blotting
- **OTHER:** high performance liquid chromatography
- **OTHER:** laboratory biomarker analysis
- **OTHER:** pharmacological study
- **PROCEDURE:** adjuvant therapy
- **PROCEDURE:** immunoscintigraphy

## Key facts

- **NCT ID:** NCT00550563
- **Lead sponsor:** Roswell Park Cancer Institute
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2007-08
- **Primary completion:** 2009-04
- **Final completion:** 2010-07
- **Target enrollment:** 50 (ACTUAL)
- **Last updated:** 2017-04-04


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00550563

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00550563, "DNA Changes That Affect Vitamin D Metabolism in Patients With Colorectal Cancer Receiving Vitamin D Supplements". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT00550563. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*