An Open-label Study of JSB462 (Luxdegalutamide) in Combination With Abiraterone in Adult Male Patients With Metastatic Hormone-sensitive Prostate Cancer (mHSPC)
Purpose
This Phase II study aims to evaluate efficacy and safety of the combination of JSB462 (also known as luxdegalutamide) at 100 mg and 300 mg once a day (QD) doses + abiraterone compared with an androgen receptor pathway inhibitor (ARPI, abiraterone or enzalutamide) in participants with metastatic Hormone Sensitive Prostate Cancer (mHSPC) and to select the recommended dose of the combination for phase III. Towards that end, the totality of the efficacy, safety, tolerability and PK data from participants randomized in the study will be evaluated
Condition
- Metastatic Hormone-sensitive Prostate Cancer
Eligibility
- Eligible Ages
- Over 18 Years
- Eligible Sex
- Male
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- An Eastern Cooperative Oncology Group (ECOG) Performance Status (PS) ≤2 - Histologically confirmed adenocarcinoma of the prostate. Participants with mixed histology (neuroendocrine) are not eligible - High-volume mHSPC, defined by the presence of ≥1 metastatic visceral non-nodal lesion and/or ≥4 metastatic bone lesions (with at least one lesion outside the vertebral column and/or pelvis) in imaging exams (CT/MRI or bone scan) according to local radiology assessment by the investigator obtained ≤28 days prior to randomization - Participants must have a castrate level of serum/plasma testosterone (<50 ng/dL or <1.7 nmol/L). Ongoing ADT (as defined by prior orchiectomy and/or ongoing GnRH analog/antagonist) for ≤90 days is allowed prior to randomization, provided that PSA zero (PSA level <0.2 ng/ml according to local laboratory as assessed by the investigator) is not achieved prior to randomization.
Exclusion Criteria
- Prior exposure to a second generation ARPI (such as enzalutamide/darolutamide/apalutamide and/or abiraterone) for the treatment of advanced/metastatic disease is not allowed. Prior exposure to ARPI, to taxane chemotherapy (up to 6 cycles) or to RLT in the context of (neo)adjuvant treatment for localized prostate cancer is allowed, if the last dose of this treatment was administered >12 months from randomization. Prior use of a first generation ARPI (such as bicalutamide) in the context of ADT initiation with a GnRH analog is allowed, provided the first generation ARPI was administered for ≤14 days and last dose was administered ≥7 days from randomization. - Participants with biochemical recurrence only or those without evidence of metastatic disease by radiological imaging (CT/MRI or bone scan) are not eligible Other inclusion/exclusion criteria may apply.
Study Design
- Phase
- Phase 2
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel Assignment
- Primary Purpose
- Treatment
- Masking
- None (Open Label)
Arm Groups
| Arm | Description | Assigned Intervention |
|---|---|---|
|
Experimental Arm 1 |
JSB462 100 mg QD + abiraterone 1000 mg QD |
|
|
Experimental Arm 2 |
JSB462 300 mg QD + abiraterone 1000 mg QD |
|
|
Active Comparator Arm 3 |
abiraterone 1000 mg QD or enzalutamide 160 mg QD |
|
Recruiting Locations
La Jolla, California 92093-0658
Santa Monica, California 90404
Denver, Colorado 80218
New Haven, Connecticut 06520
Daytona Beach, Florida 32114
Atlanta, Georgia 30322
Chicago Ridge, Illinois 60415
Bethesda, Maryland 20817
West Bloomfield, Michigan 48322
Syracuse, New York 13210
Philadelphia, Pennsylvania 19111
Myrtle Beach, South Carolina 29572
Norfolk, Virginia 23502
Seattle, Washington 98109
More Details
- Status
- Recruiting
- Sponsor
- Novartis Pharmaceuticals
Detailed Description
The study for each participant consists of a Screening period (28 days), a treatment period, a post-treatment safety follow-up (30 days) followed by a long-term follow-up period. During the treatment period: - JSB462 is administered from randomization, orally, daily and continuously (100 mg or 300 mg QD) until disease progression per PCWG3-modified RECIST 1.1 as assessed by the investigator, the occurrence of unacceptable toxicities, death, participant decision or investigator decision. - Abiraterone 1000 mg or enzalutamide 160 mg are administered from randomization, orally, daily, and continuously until disease progression per PCWG3-modified RECIST 1.1 as assessed by the investigator, the occurrence of unacceptable toxicities, death, participant decision or investigator decision. During the post-treatment follow up period: - Safety follow-Up: After discontinuation of study treatment, all participants will be followed for at least 1 safety follow-up visit (30 days [+/- 7 days] after treatment discontinuation). Subsequent lines of therapy may be administered according to investigator's discretion after treatment discontinuation. - Long-term follow-up: Starts after the Safety follow-up period and lasts until the end of study. Safety, efficacy and survival information may be collected from participants during this period.