Therapeutic Effect of Cytoreductive Radical Prostatectomy in Men With Newly Diagnosed Metastatic Prostate Cancer

January 16, 2026 updated by: Yale University

SIMCAP (Surgery in Metastatic Carcinoma of Prostate): Phase 2.5 Multi-Institution Randomized Prospective Clinical Trial Evaluating the Impact of Cytoreductive Radical Prostatectomy Combined With Best Systemic Therapy on Oncologic and Quality of Life Outcomes in Men With Newly Diagnosed Metastatic Prostate Cancer

This randomized phase II trial studies how well surgical removal of the prostate and antiandrogen therapy with or without docetaxel work in treating men with newly diagnosed prostate cancer that has spread to other places in the body. Androgens can cause the growth of prostate cancer cells. Antiandrogen therapy may lessen the amount of androgens made by the body. Drugs used in chemotherapy, such as docetaxel work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Surgery, antiandrogen therapy and docetaxel may work better in treating participants with prostate cancer.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

PRIMARY OBJECTIVES:

I. To assess the clinical benefit of combining radical surgery cytoreductive radical prostatectomy (CRP) - with the best systemic therapy (BST) in men with newly diagnosed clinical metastatic prostate cancer (mPCa).

SECONDARY OBJECTIVES:

I. To determine the impact of CRP+BST on time to biochemical progression, cancer-specific survival, overall survival, complication rates, and quality of life (QOL) in patients with mPCa.

II. To determine the transcription levels of bone morphogenetic protein -6 (BMP-6) and transforming growth factor-beta (TGF-?).

OUTLINE: Participants are randomized to 1 of 2 arms.

ARM I: Participants receive antiandrogen therapy with or without docetaxel at the discretion of the treating physician.

ARM II: Participants receive antiandrogen therapy for at least 1 month, then undergo cytoreductive radical prostatectomy. Participants continue antiandrogen therapy and may receive docetaxel prior to surgery at the discretion of the treating physician.

After completion of study treatment, patients are followed up every 6 months from time of progression.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
190

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

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 Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • Australia
    • Australia
      • East Melbourne, Australia, Australia, 9084
        • Epworth Healthcare
  • China
      • Hong Kong, China
        • Chinese University of Hong Kong
  • Japan
      • Akita, Japan
        • Akita University
      • Tokyo, Japan
        • Juntendo University
    • Osaka
      • Ōsaka-sayama, Osaka, Japan, 589-8511
        • Kindai University
  • South Korea
      • Goyang-si, South Korea
        • National Cancer Center
      • Gyeonggi-do, South Korea
        • Seoul National University Bundang Hospital
      • Seoul, South Korea
        • Samsung Medical Center
  • Taiwan
      • Taipei, Taiwan
        • National Taiwan University Hospital
  • United States
    • California
      • Duarte, California, United States, 91010
        • City of Hope
      • Irvine, California, United States, 92697
        • University of California, Irvine
      • Los Angeles, California, United States, 90033
        • University of Southern California
    • Connecticut
      • New Haven, Connecticut, United States, 06519
        • Yale University
    • New Jersey
      • New Brunswick, New Jersey, United States, 08903
        • Rutgers Cancer Institute of New Jersey
    • Pennsylvania
      • Philadelphia, Pennsylvania, United States, 19104
        • University of Pennsylvania
    • Washington
      • Seattle, Washington, United States, 98104
        • Swedish Medical Services

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Histologically proven adenocarcinoma of the prostate
  • Evidence of metastasis by magnetic resonance imaging (MRI)/computed tomography (CT) scan, bone scan, or histologic confirmation
  • Clinical stage M1a (distant lymph node positive), M1b (bone metastasis), or M1c (solid organ metastasis.
  • If solitary lesion, metastasis confirmed with either biopsy or two independent imaging modalities (i.e. CT and PET [positron emission tomography], bone scan and MRI, modality at the discretion of the treating physician)
  • No previous local therapy for prostate cancer (i.e prostate radiation, cryotherapy, etc.)
  • Give informed consent
  • Prostate deemed resectable by surgeon
  • Plans to start or has already started antiandrogen therapy (ADT) no longer than 6 months prior to consent
  • Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1
  • Hemoglobin (HgB) >= 9 g/dL compatible for surgery
  • Platelets > 80,000/mcL compatible for surgery
  • Aspartate aminotransferase (AST) =< 2x upper limit of normal (ULN) compatible for surgery
  • Alanine aminotransferase (ALT) =< 2x upper limit of normal (ULN) compatible for surgery

Exclusion Criteria:

  • Refuses to give informed consent
  • Deemed to have unresectable disease by surgeon
  • Received ADT for more than 6 months prior to consent
  • Life expectancy of less than 6 months prior to consent
  • Active spinal cord compression
  • Deep vein thrombosis (DVT) / pulmonary embolism (PE) in the past 6 months prior to consent
  • Previous local therapy for prostate cancer
  • Patients who have chemotherapy or radiotherapy for non-prostate cancer related treatment within 3 weeks prior to consent

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

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Arm I (ADT, docetaxel)
Participants receive antiandrogen therapy with or without docetaxel at the discretion of the treating physician.
Other: Laboratory Biomarker Analysis
Correlative studies
Other: Questionnaire Administration
Ancillary studies
Procedure: Quality-of-Life Assessment
Ancillary studies
Other Names:
  • Quality of Life Assessment
Drug: Antiandrogen Therapy
To demonstrate at least 30% improvement in FFS at 2 years after randomization with the power of 90% and error of 5% on a one-sided exponential MLE test.
Other Names:
  • ADT
  • Androgen Deprivation Therapy
  • Anti-androgen Therapy
  • Anti-androgen Treatment
  • Antiandrogen Treatment
  • Hormone Deprivation Therapy
  • Hormone-Deprivation Therapy
Drug: Docetaxel
To demonstrate at least 30% improvement in FFS at 2 years after randomization with the power of 90% and error of 5% on a one-sided exponential MLE test.
Other Names:
  • Taxotere
  • Docecad
  • RP56976
  • Taxotere Injection Concentrate
Experimental: Arm II (ADT, radical prostatectomy, docetaxel)
Participants receive antiandrogen therapy for at least 1 month, then undergo cytoreductive radical prostatectomy. Participants continue antiandrogen therapy and may receive docetaxel prior to surgery at the discretion of the treating physician.
Other: Laboratory Biomarker Analysis
Correlative studies
Other: Questionnaire Administration
Ancillary studies
Procedure: Quality-of-Life Assessment
Ancillary studies
Other Names:
  • Quality of Life Assessment
Drug: Antiandrogen Therapy
To demonstrate at least 30% improvement in FFS at 2 years after randomization with the power of 90% and error of 5% on a one-sided exponential MLE test.
Other Names:
  • ADT
  • Androgen Deprivation Therapy
  • Anti-androgen Therapy
  • Anti-androgen Treatment
  • Antiandrogen Treatment
  • Hormone Deprivation Therapy
  • Hormone-Deprivation Therapy
Drug: Docetaxel
To demonstrate at least 30% improvement in FFS at 2 years after randomization with the power of 90% and error of 5% on a one-sided exponential MLE test.
Other Names:
  • Taxotere
  • Docecad
  • RP56976
  • Taxotere Injection Concentrate
Procedure: Radical Prostatectomy
Undergo cytoreductive radical prostatectomy
Other Names:
  • Prostatovesiculectomy

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Failure-free survival (FFS)
Time Frame: At 2 years
Failure is defined as any one of the following events: PSA progression, clinical progression, radiographic progression, or death from prostate cancer. The % of men who fail within 2 years of randomization will be compare between the two groups using a one-sided log-rank test.
At 2 years

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Time Frame
Cancer-specific survival
Time Frame: Up to 2 years
Up to 2 years
Overall complication rate
Time Frame: Up to 2 years
Up to 2 years
Time to biochemical progression
Time Frame: Up to 2 years
Up to 2 years
Overall survival
Time Frame: Through study completion, a minimum of 4 years
Through study completion, a minimum of 4 years

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Yale University

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
National Cancer Institute (NCI)

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Isaac Kim, MD, Yale University

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)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
March 20, 2018

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
March 1, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
March 1, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
February 20, 2018

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 28, 2018

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
March 7, 2018

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
January 21, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 16, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
January 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 2000031290
  • P30CA072720 (U.S. NIH Grant/Contract)
  • NCI-2018-00047 (Registry Identifier: CTRP (Clinical Trial Reporting Program))
  • 081707 (Other Identifier: Rutgers Cancer Institute of New Jersey)
  • Pro20170001506 (Other Identifier: WIRB)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

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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