Prostate Clinical Trial
Official title:
Intraprostatic Androgenicity in Relation to Circulating Levels of Hormones and Polymorphisms of Hormone-Related Genes: A Methodologic Study
Verified date | May 2020 |
Source | National Institutes of Health Clinical Center (CC) |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Observational |
Although compelling evidence from laboratory studies suggests that androgens play a major
role in prostate carcinogenesis, epidemiologic studies in humans (almost exclusively
serologic studies) have been unable to confirm the hormonal hypothesis. The major limitation
in these serologic studies may stem from difficulty in measuring androgenicity directly at
the target site - the prostate. If circulating hormones do not reflect intraprostatic hormone
levels or androgenicity, it is not clear how we should interpret results from serum/plasma
measurements, and it is unlikely that future serologic studies can clarify the role of
hormones in prostate cancer etiology.
This study is a comprehensive methodologic study designed to collect venous blood and
prostatic tissue from 650 patients (100 Chinese, 500 American, and 50 Italian) undergoing
prostatic surgery (radical prostatectomy, cystoprostatectomy, or transurethral resection of
the prostate) in order to correlate prostate tissue with serum hormone levels, and with
polymorphisms of hormone-related genes (including the androgen receptor and SRD5A2, the gene
encoding 5-alpha-reductase Type II), and to examine characteristics (such as age, smoking,
body size) that might affect serum-tissue correlation. We plan to study the following
hormones: testosterone, dihydrotestosterone, androstenedione, androstandediol glucuronide,
estradiol, estrone, and estrone sulfate. Levels of androgen receptor and its associated
protein in prostatic tissue will also be measured to provide a better estimate of total
intraprostatic androgenicity. We also plan to collect saliva from 100 of these cases in the
Washington, D.C. area and 100 of these cases in China, to assess whether this non-invasive
tissue collection method is valid for hormone measurements. Finally, urine collection from
100 of these Chinese men is planned for study of androgen metabolites.
Additionally, we plan to include 200 Chinese subjects for blood collection without tumor
tissue for gene polymorphism studies, bringing the total number of subjects enrolled to 850.
For the 650 subjects providing prostate tissue, 30-ml of fasting blood will be collected for
hormone and polymorphism analyses, and tissue will be collected at surgery. A 15-minute
interview will be conducted to elicit information on demographic characeristics, tobacco and
alcohol use, body size, and medical history.
The proposed methodologic study will be the first of its kind to investigate androgenicity in
target tissues directly, and the correlation of target tissue androgenicity with circulating
levels of hormones and polymorphisms of hormone-related genes in a well-designed
epidemiologic study. This study will provide critical information to guide future analytic
studies on hormones and prostate cancer.
Status | Completed |
Enrollment | 553 |
Est. completion date | May 15, 2020 |
Est. primary completion date | May 15, 2020 |
Accepts healthy volunteers | No |
Gender | Male |
Age group | 18 Years to 100 Years |
Eligibility |
- INCLUSION CRITERIA: Subjects must be over age 18. Subjects must have a newly diagnosed prostate disease or condition. Subjects must not currently take hormones. |
Country | Name | City | State |
---|---|---|---|
China | Shanghai Cancer Institute | Shanghai | |
United States | Fairfax Hospital | Falls Church | Virginia |
United States | Doctors Community Hospital | Lanham | Maryland |
United States | University of Oklahoma Health Sciences Center | Oklahoma City | Oklahoma |
United States | University of California, San Francisco | San Francisco | California |
United States | GW University Medical Center GW Hospital Center | Washington | District of Columbia |
United States | Washington Hospital Center | Washington | District of Columbia |
Lead Sponsor | Collaborator |
---|---|
National Cancer Institute (NCI) |
United States, China,
Hsing AW. Hormones and prostate cancer: where do we go from here? J Natl Cancer Inst. 1996 Aug 21;88(16):1093-5. — View Citation
Montie JE, Pienta KJ. Review of the role of androgenic hormones in the epidemiology of benign prostatic hyperplasia and prostate cancer. Urology. 1994 Jun;43(6):892-9. Review. — View Citation
Vatten LJ, Ursin G, Ross RK, Stanczyk FZ, Lobo RA, Harvei S, Jellum E. Androgens in serum and the risk of prostate cancer: a nested case-control study from the Janus serum bank in Norway. Cancer Epidemiol Biomarkers Prev. 1997 Nov;6(11):967-9. — View Citation
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Intraprostatic hormone concentrations | comparisons between circulating and intraprostatic hormones | Cross-sectional |
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