A Phase I/II Study of Enzalutamide in Combination With Indomethacin in Castration-Resistant Prostate Cancer (CRPC)
Overview
- Phase
- Phase 1
- Intervention
- Enzalutamide
- Conditions
- Metastatic Prostate Carcinoma
- Sponsor
- Mamta Parikh
- Enrollment
- 38
- Locations
- 1
- Primary Endpoint
- Incidence of adverse events evaluated according to National Cancer Institute Common Terminology Criteria for Adverse Events version 4.0
- Status
- Recruiting
- Last Updated
- 2 years ago
Overview
Brief Summary
This phase I/II trial studies the side effects of enzalutamide and indomethacin and to see how well they work in treating patients with prostate cancer that does not respond to treatment with hormones, has come back, or has spread from where it started to other places in the body. Androgens can cause the growth of prostate cancer cells. Hormone therapy using enzalutamide and indomethacin may fight prostate cancer by lowering the amount of androgen the body makes and/or blocking the use of androgen by the tumor cells.
Detailed Description
PRIMARY OBJECTIVES: I. To assess the toxicity of indomethacin and enzalutamide when given in combination, and to determine the prostate-specific antigen (PSA) response that is defined as a 50% or more reduction from the baseline. SECONDARY OBJECTIVES: I. To determine the overall response as determined by the Prostate Cancer Working Group 2 criteria (PCWG2). II. To evaluate the progression-free survival (PFS) and overall survival of castration-resistant prostate cancer (CRPC) patients treated with indomethacin and enzalutamide. III. To evaluate molecular correlatives for patient response and outcomes through the analysis of patient baseline tumor specimens (diagnostic biopsy) along with serial blood specimens. OUTLINE: Patients receive enzalutamide orally (PO) once daily (QD) and indomethacin PO twice daily (BID) or QD. Courses repeat every 4 weeks in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up for 3 months.
Investigators
Mamta Parikh
Principal Investigator
University of California, Davis
Eligibility Criteria
Inclusion Criteria
- •Patients must have histologically or cytologically confirmed prostate cancer (CaP); CaP can be recurrent disease after definitive therapy (radical prostatectomy or radiation therapy) for localized CaP, or metastatic CaP
- •Patients must have CaP deemed to be castration-resistant by one or more of the following criteria (despite androgen deprivation when applicable):
- •Progression of unidimensionally measurable disease assessed within 42 days prior to initial administration of drug
- •Progression of evaluable but not measurable disease assessed within 42 days prior to initial administration of drug for PSA evaluation and for imaging studies (e.g, bone scans)
- •Rising PSA, defined as at least two consecutive rises in PSA to be documented over a reference value (measure 1); the first rising PSA (measure 2) should be taken at least 7 days after the reference value; a third confirmatory PSA measure (2nd beyond the reference level) should be greater than the second measure, and it must be obtained at least 7 days after the 2nd measure; if this is not the case, a fourth PSA measurement is required to be taken and be greater than the second measure
- •Measurable disease is not required
- •Patients who have measurable disease must have had X-rays, scans or physical examinations used for tumor measurement completed within 28 days prior to initial administration of drug
- •Patients must have non-measurable disease (such as nuclear medicine bone scans) and non-target lesions (such as PSA level) assessed within 28 days prior to initial administration of drug
- •Soft tissue disease that has been radiated within two months prior to registration is not assessable as measurable disease; soft tissue disease that has been radiated two or more months prior to registration is assessable as measurable disease provided that the lesion has progressed following radiation; as the biology of previously irradiated tumors may be different from non-irradiated tumors, patients must have at least one measurable lesion outside the previously irradiated region in order to be considered to have measurable disease
- •If PSA is the only indicator of disease and patients do not have any metastatic disease, PSA value must be 5.0 or higher
Exclusion Criteria
- •Patients who have had chemotherapy or radiotherapy within 4 weeks prior to entering the study or those who have not recovered from adverse events due to agents administered more than 4 weeks earlier
- •Patients who are receiving any other investigational agents within the preceding 4 weeks
- •Patients on herbs or other alternative medicines for the treatment of prostate cancer, including but not limited to saw palmetto, PC-SPES
- •Patient has received enzalutamide or ketoconazole for the treatment of prostate cancer; however, previous treatment with other hormonal therapy (bicalutamide, abiraterone, flutamide, and nilutamide) or chemotherapy (docetaxel, cabazitaxel, or mitoxantrone) is allowed
- •Other malignancies within the past 3 years except for adequately treated basal or squamous cell carcinomas of the skin or other stage 0 or I cancers
- •Patients with known brain metastases should be excluded from this clinical trial because of their poor prognosis and because they often develop progressive neurologic dysfunction that would confound the evaluation of neurologic and other adverse events
- •History of allergic reactions attributed to compounds of similar chemical or biologic composition to enzalutamide or indomethacin
- •Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements
- •Human immunodeficiency virus (HIV)-positive patients on combination antiretroviral therapy are ineligible
- •Impairment of gastrointestinal function or gastrointestinal disease that may significantly alter the absorption of drugs (e.g., ulcerative disease, uncontrolled nausea, vomiting, diarrhea, malabsorption syndrome, or small bowel resection)
Arms & Interventions
Treatment (enzalutamide, indomethacin)
Patients receive enzalutamide PO QD and indomethacin PO BID or QD. Courses repeat every 4 weeks in the absence of disease progression or unacceptable toxicity.
Intervention: Enzalutamide
Treatment (enzalutamide, indomethacin)
Patients receive enzalutamide PO QD and indomethacin PO BID or QD. Courses repeat every 4 weeks in the absence of disease progression or unacceptable toxicity.
Intervention: Indomethacin
Outcomes
Primary Outcomes
Incidence of adverse events evaluated according to National Cancer Institute Common Terminology Criteria for Adverse Events version 4.0
Time Frame: Up to 3.5 years
Adverse events and adverse events of grade 3 or higher will be listed for each patient and summarized by body system in a frequency table.
PSA response rate defined as >= 50% decrease from the baseline
Time Frame: Up to 3.5 years
The characteristics of the study participants will be summarized using frequencies and percentages for categorical variables and descriptive statistics (mean, standard deviation, median, minimum, maximum) for numeric variables. The proportion of participants who experience a PSA response will be computed, along with the exact 95% confidence interval.
Secondary Outcomes
- Overall response determined by PCWG2 criteria(Up to 3.5 years)
- Overall survival(Up to 3.5 years)
- PFS(Up to 3.5 years)