Markers for Early Detection of Prostate Cancer

This study has been completed.
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:
NCT00340717
First received: June 19, 2006
Last updated: March 3, 2008
Last verified: September 2006
  Purpose

This study will determine whether certain gene alterations can serve as markers for early detection of prostate cancer. Prostate cancer is often diagnosed by detecting high levels of a protein called prostate-specific antigen (PSA) in the blood. Other conditions can also cause elevated PSA levels, however, so that additional tests are needed to distinguish between benign and cancerous prostate conditions.

Patients between 40 and 75 years of age who are referred to Howard University Hospital in Washington, D.C., or Madigan Army Medical Center in Tacoma, Washington, for ultrasound and needle biopsy to diagnose prostate cancer may be eligible for this study.

Participants will undergo the following procedures at the time of the biopsy visit:

  • Blood collection: Patients have 10 milliliters (2 teaspoons) of blood drawn.
  • Prostate massage: Patients have a rectal examination and prostate massage. For the latter procedure, the physician lightly massages the prostate gland for about 15 seconds. After the massage, the patient provides a urine specimen.
  • Biopsy: A small sample of tumor tissue is removed surgically for examination under the microscope.

Patients whose initial biopsy does not show cancer cells, but who are advised to have a repeat biopsy in the future will give a blood, urine, and biopsy specimen at the time of the next biopsy.

Patients who are diagnosed with prostate cancer and undergo surgery to remove the tumor will have a small sample of tumor tissue set aside for this study to look for substances that may help predict prostate cancer.


Condition
Prostate Cancer

Study Type: Observational
Official Title: Multi-Institutional Pilot Study to Evaluate Molecular Markers in Urine and Serum in the Early Detection of Prostate Cancer

Resource links provided by NLM:


Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment: 100
Study Start Date: May 2003
Detailed Description:

In the U.S., screening by prostate-specific antigen (PSA) is widespread and considered to be an effective early detection screen for prostate cancer although there are some problems associated with its use. Only about 30-40% of men with elevated PSA are diagnosed with cancer on initial biopsy. The other 60-70% are diagnosed with either benign prostatic hyperplasia or low-or high-grade prostatic intraepithelial neoplasia (LGPIN or HGPIN). Due to their persistent elevated PSA levels, men undergo repeat biopsies where many are subsequently diagnosed with cancer (the false negative rate for biopsies with pathological diagnoses of benign or LGPIN has been reported to be 13-19% and for HGPIN from 50-70%). We propose to conduct a pilot study to evaluate whether (i) the addition of molecular markers (e.g., tumor-specific gene methylation of GSTPI, CD44, Annexin II, and Caveolin 1) detectable in serum and/or urine sediments after prostatic massage can improve the prediction of prostate cancer and (ii) addition of tumor-specific gene methylation detectable in core-needle biopsy specimens can improve the sensitivity of core-needle biopsy in the diagnosis of prostate cancer among patients screened at two Urology clinics located at Howard University, Washington, DC and Madigan Army Medical Center, Tacoma, WA. Preliminary studies have shown detection of hypermethylated genes in urine sediments after prostatic massage in men with elevated PSA (greater than 4ng/ml) improved the specificity of PSA from 73% to 98%. Further, DNA hypermethylation of tumor-specific genes was also identified in serum. In our laboratory, we have developed assays for evaluating DNA hypermethylation of several genes shown to be important in prostate carcinogenesis. These assays are highly sensitive (able to detect down to about 20 tumor cells with methylated DNA) and specific (can distinguish methylated from normal DNA from in a ratio of 1 tumor cell in 10,000 normal cells), and could serve to add value to current prostate cancer screening modalities.

  Eligibility

Ages Eligible for Study:   40 Years to 75 Years
Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No
Criteria
  • INCLUSION CRITERIA:

Patients must be within 40-75 years of age.

Patients referred for diagnostic transrectal ultrasound and prostate needle biopsy.

Patients must be adults and capable of understanding and signing an informed consent form.

Patients must be willing to undergo a brief prostatic massage and provide a urine and serum specimen prior to diagnostic core needle biopsy.

EXCLUSION CRITERIA:

Patients with active of history of other malignancy (excluding non-melanoma skin cancer).

  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00340717

Locations
United States, Washington
Madigan Army Medical Center
Tacoma, Washington, United States, 98431
Sponsors and Collaborators
  More Information

Publications:
ClinicalTrials.gov Identifier: NCT00340717     History of Changes
Other Study ID Numbers: 999903187, 03-C-N187
Study First Received: June 19, 2006
Last Updated: March 3, 2008
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
Methylation
Genes
Screening
Prospective
Diagnosis

Additional relevant MeSH terms:
Prostatic Neoplasms
Genital Neoplasms, Male
Urogenital Neoplasms
Neoplasms by Site
Neoplasms
Genital Diseases, Male
Prostatic Diseases

ClinicalTrials.gov processed this record on April 17, 2014