CASCARA: Castration Sensitive Carboplatin, Cabazitaxel and Abiraterone

April 30, 2026 updated by: Masonic Cancer Center, University of Minnesota

A Phase II Study of Carboplatin, Cabazitaxel and Abiraterone in High Volume Metastatic Castration Sensitive Prostate Cancer

This is a phase II clinical trial in patients with metastatic castration sensitive prostate cancer. The objective of the study is to determine the efficacy and further define the safety of the treatment combination. This study will evaluate dose levels of carboplatin AUC 4 with cabazitaxel 20 mg/m2. Patients will be treated with the combination of ADT and carboplatin and cabazitaxel for 6 cycles. After 6 cycles of chemotherapy, they will start abiraterone with ADT. The primary objective is to determine the percent of subjects that have no PSA or radiographic progression at 1 year. Secondary objectives will include determining the progression-free survival, time to PSA nadir and time to PSA progression of carboplatin and cabazitaxel in combination with ADT.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

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.

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 (Actual)

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.
61

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

  • United States
    • Arizona
      • Phoenix, Arizona, United States, 85054
        • Mayo Clinic Arizona
    • Illinois
      • Chicago, Illinois, United States, 60611
        • Northwestern University
      • Chicago, Illinois, United States, 60637
        • University of Chicago
    • Louisiana
      • New Orleans, Louisiana, United States, 70112
        • Tulane University
    • Minnesota
      • Minneapolis, Minnesota, United States, 55455
        • Masonic Cancer Center at University of Minnesota
    • Nevada
      • Las Vegas, Nevada, United States, 89169
        • Comprehensive Cancer Centers of Nevada
    • Pennsylvania
      • Philadelphia, Pennsylvania, United States, 19107
        • Thomas Jeferson University
    • Rhode Island
      • Providence, Rhode Island, United States, 02903
        • Lifespan Cancer Institute

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:

  • Willing and able to provide, or have a legally authorized representative provide, written informed consent and HIPAA authorization for the release of personal health information. A signed informed consent must be obtained before screening procedures are performed.
  • Histologically confirmed prostate cancer.
  • High volume metastatic disease (defined as the presence of visceral metastases or ≥3 bone lesions).
  • ADT for ≤3 months by day 1 of study chemotherapy; Prior episodes of ADT are allowed (i.e. ADT used previously in courses of radiation).
  • Testosterone <50 ng/dL. Patients must continue primary ADT with an LHRH analogue if they have not undergone orchiectomy.
  • ECOG Performance Status 0 or 1 (see Appendix A)

  • Patient has adequate bone marrow and organ function as defined by the following laboratory values:

    • Absolute neutrophil count ≥ 1.5 × 10^9/L
    • Platelets ≥ 100 × 10^9/L
    • Hemoglobin ≥ 9 g/dl
    • Serum creatinine ≤ 1.5mg/dL or estimated creatinine clearance ≥ 50 ml/min
    • In the absence of liver metastases, alanine aminotransferase (ALT) and aspartate aminotransferase (AST) <2.5 x ULN. If the patient has liver metastases, ALT and AST <5 x ULN
    • Total bilirubin < ULN; or total bilirubin ≤3.0 x ULN or direct bilirubin ≤1.5 x ULN in patients with well-documented Gilbert's Syndrome.
  • Sexually active males must use a condom during intercourse while taking study drugs and for 30 days after stopping treatment and should not father a child in this period. A condom is required to be used also by vasectomized men in order to prevent delivery of the drug via seminal fluid. Fertile males must use a condom with spermicide (double barrier method).
  • Age ≥ 18 years

Exclusion Criteria:

  • Prior exposure to any chemotherapy, PARPi, or immunotherapy for prostate cancer.
  • Prior abiraterone or enzalutamide, unless therapy was for < 2 weeks
  • Radiation therapy (including palliative radiotherapy to a metastatic lesion) within 14 days or major surgery (e.g., open abdominal, pelvic, thoracic, orthopedic or neurosurgery) within 28 days of the date of the first dose.
  • Other systemic therapies for prostate cancer within 28 days or 5 half-lives, whichever is shorter, prior to day 1 of chemotherapy (with the exception of anti-androgens like bicalutamide).
  • PSA <2.0 ng/mL at diagnosis.
  • If present, peripheral neuropathy must be ≤ Grade 1
  • Patients with an active second malignancy that could, in the investigator's opinion, potentially interfere with the patient's ability to participate and/or complete this trial.

  • Patients with central nervous system (CNS) involvement unless they meet ALL of the following criteria:

    • At least 4 weeks from prior therapy completion (including radiation and/or surgery) prior to starting the study treatment
    • Clinically stable CNS tumor at the time of screening.
    • Baseline screening for CNS metastases is not required unless presence of signs and/or symptoms of involvement
  • Patients with severe psychiatric illness/social situations that would limit compliance with study requirements in the judgment of treating investigator.
  • Patient has a history of non-compliance to medical regimen or inability to grant 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: N/A
  • Interventional Model: Single Group 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: Carboplatin, Cabazitaxel and Abiraterone
Drug: Cabazitaxel
20 mg/m2 Q 21 days
Drug: Carboplatin
AUC 4 Q21 Days x 6 cycles with ADT
Drug: Abiraterone
1000 mg PO daily
Drug: Prednisone
5 mg PO daily on chemotherapy completion

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
Prostate-Specific Antigen (PSA) or Radiographic Progression
Time Frame: 1 Year
Number of patients who have no PSA or radiographic progression as determined by RECIST 1.1 or PCWG3 criteria
1 Year

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
Measure Description
Time Frame
PSA Progression
Time Frame: 1 Year
Time to PSA progression
1 Year
Progression-Free Survival (PFS)
Time Frame: 1 Year
Percentage of participants achieving Progression Free Survival
1 Year
PSA Nadir
Time Frame: 1 Year
Time to PSA nadir
1 Year
Incidence of Adverse Events
Time Frame: 1 Year
Safety and Tolerability
1 Year
PSA Complete Response Rate
Time Frame: 1 Year
PSA complete response rate (PSA <=0.2 ng/mL) in patient with mutations in DNA repair genes
1 Year
PSA Complete Response Rate
Time Frame: 1 Year
PSA complete response rate (PSA <=0.2 ng/ml) in patient without mutations in DNA repair genes
1 Year
Incidence of Homologous Recombination Deficiency (HRD)
Time Frame: 1 year
Incidence of HRD
1 year

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.
Masonic Cancer Center, University of Minnesota

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: Emmanuel Antonarakis, MD, Masonic Cancer Center, University of Minnesota

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.
October 10, 2019

Primary Completion (Actual)

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.
June 19, 2023

Study Completion (Actual)

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.
April 3, 2025

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).
April 26, 2019

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.
April 30, 2019

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.
May 2, 2019

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.
May 26, 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.
April 30, 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.
April 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.
  • 2018LS158
  • c17-191 (Other Identifier: PCCTC)

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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