An Open-label Study of JSB462 (Luxdegalutamide) in Combination With Abiraterone in Adult Male Patients With Metastatic Hormone-sensitive Prostate Cancer (mHSPC)
Sponsor: Novartis Pharmaceuticals
ClinicalTrials ID:NCT06991556
This Phase II study evaluates the efficacy and safety of JSB462 (100 mg or 300 mg QD) with abiraterone in mHSPC patients. Participants undergo a screening, treatment, and follow-up period. Eligibility includes ECOG PS ≤2, confirmed adenocarcinoma, high-volume mHSPC, and castrate testosterone levels. Interventions include JSB462, abiraterone, or enzalutamide until disease progression or unacceptable toxicity.
Patient Parameters
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Program Overview
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
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.
Eligibility Criteria
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.
Key
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.
Locations
| FACILITY | ZIP | CITY | STATE |
|---|---|---|---|
| University of California San Diego - Moores Cancer Center | 92093-0658 | La Jolla | California |
| Rocky Mountain Cancer Centers | 80218 | Denver | Colorado |
| Emory University School of Medicine-Winship Cancer Institute | 30322 | Atlanta | Georgia |
| XCancer Omaha LLC | 68130 | Omaha | Nebraska |
| Fox Chase Cancer Center | 19111 | Philadelphia | Pennsylvania |
| Carolina Urologic Research Center | 29572 | Myrtle Beach | South Carolina |
| Sarah Cannon Research Institute | 37203 | Nashville | Tennessee |
| Urology San Antonio | 78229 | San Antonio | Texas |
| Virginia Oncology Associates | 23502 | Norfolk | Virginia |
| Fred Hutch Cancer Research | 98109 | Seattle | Washington |
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