Project description:AIMS To identify the underlying mechanism by which Vitamin D reduces colorectal cancer risk.
OBJECTIVES To demonstrate the effects of vitamin D supplementation on serum vitamin D levels.
To demonstrate dynamic changes in gene expression in response to vitamin D. To demonstrate the mechanism underlying the gene-environment interaction of vitamin D, susceptibility genetic variants (risk genes) and colorectal cancer.
Project description:RATIONALE: Studying samples of tumor tissue from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cancer. It may also help doctors understand how patients respond to treatment.
PURPOSE: This laboratory study is looking at gene expression in patients with advanced or metastatic colorectal cancer receiving bevacizumab.
