The main objective of the proposed research project is to assess the association between five candidate biological markers potentially modifiable by environmental exposures (diet and physical activity) and the two-year risk of prostate cancer in a newly recruited cohort of men at high-risk of prostate cancer showing no evidence of cancer.
Four hospitals in the province of Quebec (Canada) participate to the recruitment of 2,055 men at high-risk for prostate cancer, i.e. men who had a first negative prostate biopsy or whose Prostatic Specific Antigen (PSA) level is between 2.5 and 10 ng/mL without previous prostate biopsy.
The candidate biomarkers that will be tested are:
1. The ratio of ω-3/ ω-6 fatty acid content of red blood cell membranes,
2. Oxidized low density lipoprotein cholesterol
3. Adiponectin
4. Insulin growth factor-1
5. The ratio of dihydrotestosterone glucuronide derivatives over estradiol
A biobank, composed of biological material (whole blood, plasma, serum, lymphocyte layer and excess tissue collected from prostate biopsy or prostate surgery) and clinical data is being created. Questionnaires are used to compile information on socio-demographic aspects, family and personal medical history, quality of life, lifestyle like food and sexual habits.
