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Studying Genes, Environment, and Prostate Cancer Risk in Patients With or Without Prostate Cancer and Their First-Degree Relatives

2014-08-27 03:18:02 | BioPortfolio

Summary

RATIONALE: Gathering information about genetic and environmental factors may help doctors learn more about a person's risk for developing prostate cancer.

PURPOSE: This clinical trial is studying genes, environment, and prostate cancer risk in patients with or without prostate cancer and their first-degree relatives.

Description

OBJECTIVES:

- To evaluate the evidence of familial aggregation for prostate cancer and identify a homogenous subgroup of families with elevated likelihood of aggressive disease ("high familial risk") using a family case-control design.

- To determine if genetic variation in selected genes involved in reactive oxygen species (ROS) detoxification (e.g., glutathione and superoxide dismutase genes) and the oxidative stress response (e.g., NFE2) are independently or jointly associated with greater mitochondrial DNA damage and increased prostate cancer risk.

- To determine if dietary intake of ω-3 fatty acids alters the risk of prostate cancer.

- To determine the association between variation in genes involved in ROS detoxification, oxidative stress response, and prostate cancer risk.

OUTLINE: Probands undergo blood and saliva sample collection for fatty acid, DNA, and polymorphism analyses. Archived blood and tissue samples from probands who previously participated in Dr. Shannon's Diet and Prostate Cancer Risk study are also analyzed. First-degree relatives (FDRs) of probands found to be part of a homogenous high-risk subgroup undergo saliva sample collection for DNA analyses.

Medical records of probands are reviewed for demographics, history and course of disease, and clinical laboratory test results.

All probands and their FDRs complete the "Changes in Diet, Prescriptions, Supplementals and Herbal Remedies" or "Diet History" questionnaire and the "Genetic Risk Easy Assessment Tool Family History" questionnaire at baseline.

PROJECTED ACCRUAL: A total of 2,250 participants (750 probands and 1,500 first-degree relatives) will be accrued for this study.

Study Design

N/A

Conditions

Hereditary Prostate Cancer

Intervention

DNA analysis, polymorphism analysis, laboratory biomarker analysis, medical chart review, questionnaire administration, evaluation of cancer risk factors, study of high risk factors

Location

Veterans Affairs Medical Center - Portland
Portland
Oregon
United States
97239

Status

Recruiting

Source

National Cancer Institute (NCI)

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:18:02-0400

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