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Enzalutamide in First Line Androgen Deprivation Therapy for Metastatic Prostate Cancer (ENZAMET)

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ClinicalTrials.gov Identifier: NCT02446405
Recruitment Status : Active, not recruiting
First Posted : May 18, 2015
Last Update Posted : March 28, 2017
Information provided by (Responsible Party):

Study Description
Brief Summary:
The purpose of this study is to determine the effectiveness of enzalutamide, versus a conventional non-steroidal anti androgen (NSAA), when combined with a luteinizing hormone releasing hormone analog (LHRHA) or surgical castration, as first line androgen deprivation therapy (ADT) for newly diagnosed metastatic prostate cancer.

Condition or disease Intervention/treatment Phase
Prostatic Neoplasms Drug: Enzalutamide Drug: NSAA Drug: LHRHA or Surgical Castration Phase 3

Study Design

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 1125 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Intervention Model Description:

Stratification factors:

  1. High volume disease (yes versus no), characterised as:

    • 4 or more bone metastases, one of which is outside the vertebral column and pelvis AND/OR
    • Visceral metastases (e.g. lung, pleura, liver, adrenal and others) Lymph node involvement or bladder invasion do NOT qualify as visceral disease.
  2. Study site
  3. Concomitant "anti-resorptive" therapy to delay skeletal related events when commencing ADT
  4. Co-morbidities according to the Adult Co-morbidity Evaluation (ACE-27: 0-1 vs 2-3)
  5. Early use of docetaxel defined as use of docetaxel in conjunction with initiation of ADT.
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Randomised Phase 3 Trial of Enzalutamide in First Line Androgen Deprivation Therapy for Metastatic Prostate Cancer: ENZAMET
Study Start Date : March 2014
Estimated Primary Completion Date : September 2020
Estimated Study Completion Date : December 2020

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Prostate Cancer
U.S. FDA Resources

Arms and Interventions

Arm Intervention/treatment
Experimental: Enzalutamide

Enzalutamide is 160 mg daily, by mouth, until clinical disease progression or prohibitive toxicity.

All participants are to receive standard background therapy with a LHRHA or surgical castration, as per standard of care. The choice of the LHRHA or surgical castration is at the discretion of the treating clinician.

Drug: Enzalutamide Drug: LHRHA or Surgical Castration
Active Comparator: Conventional NSAA

Conventional NSAA, by mouth until clinical disease progression or prohibitive toxicity.

All participants are to receive standard background therapy with a LHRHA or surgical castration, as per standard of care. The choice of the LHRHA or surgical castration is at the discretion of the treating clinician.

Drug: NSAA Drug: LHRHA or Surgical Castration

Outcome Measures

Primary Outcome Measures :
  1. Overall Survival Time [ Time Frame: 3 years ]

Secondary Outcome Measures :
  1. Prostate specific antigen progression free survival time [ Time Frame: 3 years ]
  2. Clinical progression free survival time [ Time Frame: 3 years ]
  3. Adverse events [ Time Frame: 3 years ]
  4. Health-related quality of life (EORTC Core Quality of Life Questionnaire (QLQ C-30), Quality of Life Questionnaire for Prostate Cancer (PR-25), Euroqol 5 item preference-based measure of health (EQ-5 D-5L)) [ Time Frame: 3 years ]
  5. Healthcare resource cost-effectiveness (incremental cost effectiveness ratio) [ Time Frame: 3 years ]

Eligibility Criteria

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Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No

Men starting first line androgen deprivation therapy for metastatic prostate cancer.

Inclusion criteria:

  1. Male aged 18 or older with metastatic adenocarcinoma of the prostate
  2. Target or non-target lesions according to Response Evaluation Criteria in Solid Tumours (RECIST) 1.1
  3. Adequate bone marrow function: Haemoglobin (Hb) ≥100g/L and White Cell Count (WCC) ≥ 4.0 x 109/L and platelets ≥100 x 109/L.
  4. Adequate liver function: Alanine transaminase (ALT) < 2 x Upper Limit of Normal (ULN) and bilirubin < 1.5 x ULN, (or if bilirubin is between 1.5-2 x ULN, they must have a normal conjugated bilirubin). If liver metastases are present ALT must be < 5 x ULN
  5. Adequate renal function: calculated creatinine clearance > 30 ml/min (Cockcroft-Gault)
  6. Eastern Cooperative Oncology Group (ECOG) performance status of 0-2. Patients with performance status 2 are only eligible if the decline in performance status is due to metastatic prostate cancer.
  7. Study treatment both planned and able to start within 7 days after randomisation.
  8. Willing and able to comply with all study requirements, including treatment and required assessments
  9. Has completed baseline Health-Related Quality of Life (HRQL) questionnaires UNLESS is unable to complete because of limited literacy or vision
  10. Signed, written, informed consent

Exclusion Criteria:

  1. Prostate cancer with significant sarcomatoid or spindle cell or neuroendocrine small cell components
  2. History of

    • seizure or any condition that may predispose to seizure (e.g., prior cortical stroke or significant brain trauma).
    • loss of consciousness or transient ischemic attack within 12 months of randomization
    • significant cardiovascular disease within the last 3 months including: myocardial infarction, unstable angina, congestive heart failure, ongoing arrhythmias of Grade >2 [National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE), version 4.03], thromboembolic events (e.g., deep vein thrombosis, pulmonary embolism). Chronic stable atrial fibrillation on stable anticoagulant therapy is allowed.
  3. Life expectancy of less than 12 months.
  4. History of another malignancy within 5 years prior to randomisation, except for either non- melanomatous carcinoma of the skin or, adequately treated, non-muscle-invasive urothelial carcinoma of the bladder (Tis, Ta and low grade T1 tumours).
  5. Concurrent illness, including severe infection that might jeopardize the ability of the patient to undergo the procedures outlined in this protocol with reasonable safety

    a. Human Immunodeficiency Virus (HIV)-infection is not an exclusion criterion if it is controlled with anti-retroviral drugs that are unaffected by concomitant enzalutamide.

  6. Presence of any psychological, familial, sociological or geographical condition potentially hampering compliance with the study protocol and follow-up schedule, including alcohol dependence or drug abuse;
  7. Patients who are sexually active and not willing/able to use medically acceptable forms of barrier contraception.
  8. Prior ADT for prostate cancer (including bilateral orchidectomy), except in the following settings:

    • Started less than 12 weeks prior to randomisation AND Prostate Specific Antigen (PSA) is stable or falling. The 12 weeks starts from whichever of the following occurs earliest: first dose of oral anti- androgen, LHRHA, or surgical castration.
    • In the adjuvant setting, where the completion of adjuvant hormonal therapy was more than 12 months prior to randomisation AND the total duration of hormonal treatment did not exceed 24 months. For depot preparations, hormonal therapy is deemed to have started with the first dose and to have been completed when the next dose would otherwise have been due, e.g. 12 weeks after the last dose of depot goserelin 10.8mg.
  9. Prior cytotoxic chemotherapy for prostate cancer, but up to 2 cycles of docetaxel chemotherapy for metastatic disease is permitted.
  10. Participation in other clinical trials of investigational agents for the treatment of prostate cancer or other diseases.
Contacts and Locations

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02446405

  Show 82 Study Locations
Sponsors and Collaborators
University of Sydney
Australian and New Zealand Urogenital and Prostate Cancer Trials Group
National Health and Medical Research Council, Australia
Cancer Trials Ireland
NCIC Clinical Trials Group
Study Chair: Christopher Sweeney Dana Farber Cancer Institute and ANZUP
Study Chair: Ian Davis ANZUP and Eastern Health Box Hill Hospital
More Information

Additional Information:
Responsible Party: University of Sydney
ClinicalTrials.gov Identifier: NCT02446405     History of Changes
Other Study ID Numbers: ANZUP 1304
ACTRN12614000110684 ( Other Identifier: Australian New Zealand Clinical Trials Registry (ANZCTR) )
First Posted: May 18, 2015    Key Record Dates
Last Update Posted: March 28, 2017
Last Verified: March 2017

Keywords provided by University of Sydney:
metastatic prostate cancer
prostate cancer
prostate cancer treatment

Additional relevant MeSH terms:
Prostatic Neoplasms
Genital Neoplasms, Male
Urogenital Neoplasms
Neoplasms by Site
Genital Diseases, Male
Prostatic Diseases
Hormones, Hormone Substitutes, and Hormone Antagonists
Physiological Effects of Drugs