Prostate Cancer Risk Identification in a Multi-Ethnic Cohort: a Prospective US-based Multi-center Validation Study of Proclarix (PRIME)

September 23, 2026 updated by: Sequenom, Inc.

The study is a prospective, multi-center, single cohort study involving up to 10 urological clinics in the US. After provision of informed consent, up to 20 mL of whole blood will be collected from each subject. The samples will be blinded and sent to Labcorp for evaluation using the Proclarix® assay. If a prostate biopsy is performed, it will be performed according to standard clinical practice of the urologist (systematic, targeted, or combined biopsy with a transrectal or transperineal approach with or without prior magnetic resonance imaging (MRI)). A minimum of 10 cores is required if a systematic biopsy is performed. Histopathological examination of the biopsy specimen will be performed according to the established local practice. A csPCa is defined as ISUP Grade Group ≥2 detected on biopsy.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

Prostate cancer remains a leading cause of cancer-related morbidity and mortality in men worldwide, with significant disparities in incidence and outcomes across different ethnic groups with black men being affected by prostate cancer earlier, more frequently and with more aggressive disease. Current risk stratification tools often lack the precision needed to effectively assess and predict prostate cancer risk in diverse populations.

Proclarix® is a blood-based test that addresses the problem of prostate cancer (PCa) overdiagnosis by indicating the risk of clinically significant disease. It is comprised of two novel biomarkers, thrombospondin 1 (THBS1) and cathepsin D (CTSD), and is combined with total prostate-specific antigen (tPSA), free PSA (fPSA) and age. A software algorithm returns a risk score that can be used as an aid in the identification of clinically significant PCa (csPCa), defined as International Society of Urological Pathology (ISUP) Grade Group ≥ 2. Proclarix® has been developed and validated on 955 men, in majority of Caucasian background with 90% sensitivity, 43% specificity, 95% negative predictive value (NPV) and 25% positive predictive value (PPV). The validation performance established on German and Austrian patients has been fully confirmed in other European populations: the United Kingdom, Spain, Denmark, Italy and Switzerland.

To be used broadly, confirmation of Proclarix® performance in patients from diverse ethnic backgrounds requires further investigation.

Study Type

Observational

Enrollment (Estimated)

500

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • United States
    • California
      • San Diego, California, United States, 92123
    • Idaho
      • Meridian, Idaho, United States, 83642
        • Recruiting
        • Idaho Urologic Institute
        • Contact:
        • Contact:
        • Principal Investigator:
          • Joseph Williams, MD
    • Kentucky
      • Bowling Green, Kentucky, United States, 42101
    • Maryland
      • Hanover, Maryland, United States, 21076
        • Recruiting
        • Chesapeake Urology Associates
        • Principal Investigator:
          • Kaiser Robertson, MD
        • Contact:
      • Towson, Maryland, United States, 21204
        • Recruiting
        • Chesapeake Urology Associates
        • Principal Investigator:
          • Brian Neuman, MD
        • Contact:
    • New York
      • Middletown, New York, United States, 10941
    • South Carolina

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

40 years to 75 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Male

Sampling Method

Non-Probability Sample

Study Population

Approximately 500 subjects will be enrolled in this study, of which approximately 400 subjects will have a tPSA value of 4-10 ng/mL and 100 subjects will have a tPSA of 2-<4 ng/mL.

Description

Inclusion Criteria:

  1. Subject is male ≥40 and ≤75 years of age at the time of enrollment;
  2. Subject provides a signed and dated informed consent;
  3. Subject has a SOC tPSA of 2-10 ng/mL inclusive within 90 days of the study blood draw;
  4. Subject is presenting to the clinic to discuss a potential prostate biopsy;
  5. Subject agrees to provide all diagnostic test results throughout the study; and
  6. Subject agrees to provide blood for Proclarix® and phi testing at the Screening Visit.

7 Study blood sample will be collected prior to MRI (if conducted) and prior to the biopsy.

Exclusion Criteria

  1. Previous diagnosis of prostate cancer;
  2. Treatment with a medication classified as a 5α-reductase-inhibitor at any time in the 6 months prior to study blood collection;
  3. Acute or chronic urinary tract infection within 3 months of the study blood collection;
  4. Men with an indwelling catheter or intermittent self-catheterization within 30 days of the study blood collection;
  5. Digital Rectal Exam (DRE) or transurethral manipulation (e.g. cystoscopy, catheterization) the same day and prior to the study blood collection;
  6. Men who had an invasive urological procedure for benign prostate hyperplasia/obstruction (e.g. transurethral resection of the prostate (TURP), Holmium Laser Enucleation of the Prostate (HoLEP), Thulium laser enucleation of the prostate (ThuLEP), aquablation, prostatic artery embolization, Rezum, laser vaporization, etc.) or biopsy of the prostate within 6 months prior to the study blood collection;
  7. Subject is not able to read or comprehend the informed consent form;
  8. Previous enrollment in this protocol with valid biopsy results; or
  9. Men who had an MRI of the prostate within 90 days prior to the study blood collection.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: CASE_ONLY
  • Time Perspectives: PROSPECTIVE

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Prostate cancer suspected

Subjects with an elevated PSA (2-10) planning to undergo prostate biopsy
Diagnostic test: Proclarix

Proclarix® is a blood-based test that addresses the problem of prostate cancer (PCa) overdiagnosis by indicating the risk of clinically significant disease. It is comprised of two novel biomarkers, thrombospondin 1 (THBS1) and cathepsin D (CTSD), and is combined with total prostate-specific antigen (tPSA), free PSA (fPSA) and age.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Assess the clinical performance of Proclarix® in a United States (US) cohort when compared to the biopsy results.
Time Frame: From enrollment to the collection of prostate biopsy results at 90 days

Evaluate Proclarix®'s clinical performance, specifically NPV to predict the absence of csPCa on prostate biopsy.
From enrollment to the collection of prostate biopsy results at 90 days

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Evaluate Proclarix's clinical ability to correlate with and add to the results of other diagnostic tests performed as standard of care (i.e., MRI, ultrasound, etc.)
Time Frame: From enrollment to collection of biopsy results at 90 days

Compare study test results to SOC screening and diagnostic tests.
From enrollment to collection of biopsy results at 90 days
Assess Proclarix®'s clinical performance compared with percent free PSA (%fPSA), the Prostate Health Index (phi), and a risk calculator as proposed by the American Urological Association (AUA) guidelines.
Time Frame: From enrollment to collection of biopsy results at 90 days

Compare other validated study endpoints to study test results.
From enrollment to collection of biopsy results at 90 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sequenom, Inc.

Collaborators

Labcorp Corporation of America Holdings, Inc

Investigators

  • Principal Investigator: Neil Shore, MD, Carolina Urologic Research Center

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

April 3, 2026

Primary Completion (Estimated)

March 31, 2027

Study Completion (Estimated)

March 31, 2027

Study Registration Dates

First Submitted

April 14, 2026

First Submitted That Met QC Criteria

April 14, 2026

First Posted (Actual)

April 22, 2026

Study Record Updates

Last Update Posted (Actual)

September 28, 2026

Last Update Submitted That Met QC Criteria

September 23, 2026

Last Verified

September 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • SQNM-PRO-401

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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