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Phase 2 Completed N=164 Randomized Treatment

Abiraterone With Different Steroid Regimens for Side Effect Related to Mineralcorticoid Excess Prevention in Prostate Cancer Prior to Chemotherapy

Source: ClinicalTrials.gov NCT01867710 ↗
Enrolled (actual)
164
Serious AEs
31.3%
Results posted
May 2016
Primary outcomePrimary: Percentage of Participants Experiencing Neither of the 2 Mineralocorticoid Excess Toxicity During the First 24 Weeks of Treatment — 70.6; 36.8; 60.0; 70.3 Percentage of Participants

Summary

The purpose of the study is to determine the safety and clinical benefit of the combinations of abiraterone acetate and prednisone or abiraterone and dexamethasone in prostate cancer patients. Prednisone will be given at one of three different dose schedules. Dexamethasone will be given at one dose schedule. This will include looking at what side effects occur and how often they occur. In addition the impact of the study drug on quality of life and pain will be evaluated. The study will also collect data on subsequent treatment of patients after they come off the study drug (approximately 4.5 years after the start of study treatment of the first subject participating in the study). By analyzing blood samples, the study aims to identify if some markers could help to understand if the treatment with abiraterone is effective and also help to understand if patients can become resistant.

Outcome Measures

OutcomeResultp-value
PRIMARY
Percentage of Participants Experiencing Neither of the 2 Mineralocorticoid Excess Toxicity During the First 24 Weeks of Treatment
70.6; 36.8; 60.0; 70.3
SECONDARY
Percentage of Participants With Confirmed Prostate Specific Antigen (PSA) Response Rate [Greater Than or Equal to (>=) 50 Percent (%) Decline From Baseline] at Week 12
57.1; 70.6; 47.2; 79.5
SECONDARY
Change From Baseline to Endpoint in Brief Pain Inventory- Short Form (BPI-SF) Score: Worst Pain
1.6; 2.2; 2.5; 1.3
SECONDARY
Change From Baseline to Endpoint in Brief Pain Inventory- Short Form (BPI-SF) Score: Pain Intensity Subscale
1.31; 1.37; 1.80; 0.97
SECONDARY
Change From Baseline to Endpoint in Brief Pain Inventory- Short Form (BPI-SF) Score: Pain Interference Subscale
0.89; 1.76; 1.52; 1.12
SECONDARY
Change From Baseline to Endpoint in EuroQol-5 Dimension-5 Level (EQ-5D-5L): Index Score
-0.0694; -0.0638; -0.0728; -0.0359
SECONDARY
Change From Baseline to Endpoint in EuroQol-5 Dimension-5 Level (EQ-5D-5L): EQ-VAS
-4.5; -5.0; -6.6; -3.1
SECONDARY
Change From Baseline to Endpoint in Functional Assessment of Cancer Therapy-Prostate (FACT-P) Questionnaire Score
-0.98; -2.20; -2.46; -1.04; -0.01; 0.61
SECONDARY
Progression-Free Survival (PFS)
16.16; 12.68; 8.51; 21.22
SECONDARY
Time to Prostate-Specific Antigen (PSA) Progression
10.38; 10.22; 4.83; 18.56
SECONDARY
Objective Response Rate (ORR)
42.1; 38.9; 60.0; 56.3
SECONDARY
Time to Opiate Use for Cancer-related Pain
NA; NA; NA; NA
SECONDARY
Time to Deterioration in Eastern Cooperative Oncology Group (ECOG) Performance Score by 1 Point
NA; NA; NA; NA
SECONDARY
Overall Survival
34.07; 48.43; 27.96; 42.81
SECONDARY
Time to Next Prostate Cancer Therapy
20.14; 19.48; 16.66; 28.29

Eligibility Criteria

Inclusion Criteria

Have a histologically or cytologically confirmed adenocarcinoma of the prostate Have metastatic disease documented by positive bone scan or by computed tomography or magnetic resonance imaging Have prostate cancer progression documented by prostate specific antigen according to Prostate Cancer Working Group 2 or radiographic progression according to modified RECIST (response evaluation criteria in solid tumors, v1.1) criteria Be asymptomatic from prostate cancer. A score of 0-1 on BPI-SF Question #3 (worst pain in last 24 hours) will be considered asymptomatic Be surgically or medically castrated, with testosterone levels of <50 ng/dL (<2.0 nmol/L). If the subject is being treated with luteinizing hormone releasing hormone (LHRH) agonists or antagonists (subjects who have not undergone orchiectomy), this therapy must have been initiated at least 4 weeks prior to Day 1, Cycle 1 and must be continued throughout the study.

Exclusion Criteria

Has a history of pituitary or adrenal dysfunction Has an active infection or other medical condition that would contraindicate corticosteroid use Has any chronic medical condition requiring corticosteroid treatment or has received prior corticosteroid treatment for prostate cancer Has a pathological finding consistent with small cell carcinoma of the prostate Has a known brain metastasis

View full record on ClinicalTrials.gov →

Data sourced from ClinicalTrials.gov (NCT01867710). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication. Informational only — not medical advice.

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