Predictive Value of Prostate-specific Antigen Isoform p2psa and Its Derivates in the Diagnosis of Prostate Cancer

Prostate Cancer Clinical Trial

Official title:

Predictive Value of Prostate-specific Antigen Isoform p2psa and Its Derivates, %p2psa and Prostate Health Index in the Detection of Prostate Cancer and in Predicting Aggressive Disease: a Prospective Study

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01672411
• Other study ID #: propsa12
• Status: Completed
• Phase: N/A
• First received: August 21, 2012
• Last updated: February 23, 2013
• Start date: April 2012
• Est. completion date: December 2012

Study information

• Verified date: February 2013
• Source: University Of Perugia
• Contact: n/a
• Is FDA regulated: No
• Health authority: Italy: University of Perugia
• Study type: Observational

Clinical Trial Summary

In Europe, prostate cancer (PCa) is the most common solid neoplasm, with an incidence rate of 214 cases per 1000 men, outnumbering lung and colorectal cancer. Early detection tests have been developed in order to identify PCa while it is still confined to the prostate gland.

The two most commonly used tests are digital rectal examination and serum prostate-specific antigen (PSA) level: however, most of cases is detected in the so called T1c stage, i.e. for PSA increasing only. As marker, PSA is organ-specific but not cancer-specific, and its levels may change as result of physical activity, sexual activity, in the presence of benign prostatic hyperplasia (BPH), acute and chronic prostatitis, as well as in the presence of PCa.

A total serum PSA of 4.0 ng/ml has traditionally been used as threshold for considering prostate biopsy and large programs for the early detection of prostate cancer have shown that almost 70% of cancer cases can be detected using a PSA cutoff of 4.0 ng/ml. However, using a PSA threshold of 4.0 ng/ml 20% to 25% of prostate cancer cases are not detected (false-negative) and the false-positive rate is 65%. To improve the usefulness of PSA for identifying patients who require biopsy, the PSA threshold has been lowered at 2 ng/ml; moreover, the levels of free and bound PSA have been assessed, together with PSA density (the rate of PSA over the prostate volume) and PSA velocity (the rate of PSA increase), which seem to have some validity for detecting prostate cancer.

Recent studies have shown that other new biomarkers could be used in the diagnosis of early prostate cancer as they showed a higher sensitivity and specificity. In the last two years, several investigators showed that PSA isoform [−2] proPSA (p2PSA) and its derivatives, namely, percentage of p2PSA to free PSA (%p2PSA) and the Prostate Health Index [PHI; (p2PSA / free PSA) × √tPSA)] improve the accuracy of total PSA (tPSA) and percentage of free PSA (%fPSA) in predicting the presence of PCa at prostate biopsy and they are also related to PCa aggressiveness at biopsy.

The aim of this study is to confirm the diagnostic and prognostic predictive value of prostate-specific antigen isoform p2psa and its derivates, %p2psa and prostate health index in the detection of prostate cancer in patients with a PSA 2-10 ng/ml and/or suspicious DRE.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 250
• Est. completion date: December 2012
• Est. primary completion date: December 2012
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Male
• Age group: 18 Years to 75 Years

Eligibility

Inclusion Criteria:

• Men aged 18-75

• Total serum PSA of 2.0-10 ng/ml at entry and/or suspicious digital rectal examination

• Patients suitable for prostate biopsy

Exclusion Criteria:

• History of PCa

• Previous prostate biopsy or prostatic surgery

• History of acute urinary retention within 3 months prior

• Use of any investigational or marketed 5ARI, anabolic steroids or any drug with anti-androgenic properties within 12 months prior to screening.

Study Design

Observational Model: Case-Only, Time Perspective: Prospective

Related Conditions & MeSH terms

• Prostate Cancer
• Prostatic Neoplasms

Locations

Country	Name	City	State
Italy	University of Perugia - Urology Dept	Perugia

Sponsors (1)

Lead Sponsor	Collaborator
University Of Perugia

Country where clinical trial is conducted

Italy, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	diagnosis of prostate cancer	Analyzing the predictive value of %p2PSA and PHI in comparison with standard test (tPSA, fPSA, %fPSA, PSA density, DRE) in the diagnosis of prostate cancer.	6 months	No
Secondary	prognosis of prostate cancer	Analyzing the predictive value of %p2PSA and PHI in comparison with standard test (tPSA, fPSA, %fPSA, PSA density, DRE) in the evaluation of aggressiveness of prostate cancer, based on Gleason score groups at biopsy (low risk 4-6, Intermediate risk =7, high risk >=8).	6 months	No