NCT06991556 · Novartis Pharmaceuticals
An Open-label Study of JSB462 (Luxdegalutamide) in Combination With Abiraterone in Adult Male Patients With Metastatic Hormone-sensitive Prostate Cancer (mHSPC)
What this study is about
This Phase II study aims to evaluate effectiveness 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 effectiveness, safety, tolerability and PK data from partici
View original scientific description
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.
Interventions
DRUG
JSB462
JSB462 is administered 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.
DRUG
Abiraterone
Abiraterone 1000 mg is administered 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.
DRUG
Enzalutamide
Enzalutamide 160 mg is administered 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.
Primary outcome measures
Prostate Specific Antigen 90 (PSA90) Rate
Time frame: From date of randomization till 30 days safety fup, assessed up to approximately 75 months
Prostate Specific Antigen 90 (PSA90) Rate is defined as the proportion of participants who achieve a ≥90% decrease in PSA from baseline at any timepoint, confirmed by a second PSA measurement ≥3 weeks without any PSA progression in between.
Incidence rate of adverse events (AEs)
Time frame: From date of randomization till 30 days safety fup, assessed up to approximately 75 months
The analysis of adverse events will include categorization by type, frequency, and severity, as graded by the NCI CTCAE version 5.0.
Number of participants with dose adjustments
Time frame: From date of randomization till 30 days safety fup, assessed up to approximately 75 months
The number of participants with dose adjustments (reductions, interruption, or permanent discontinuation) will be summarized by treatment arm.
Duration of exposure to study treatment
Time frame: From date of randomization till 30 days safety fup, assessed up to approximately 75 months
The duration of exposure in weeks to study treatment and for each study treatment component (JSB462, abiraterone and enzalutamide) will be summarized for each study treatment component by means of descriptive statistics using the SAS.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
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 gener
Where
- La Jolla, California
- Santa Monica, California
- Denver, Colorado
- New Haven, Connecticut
- Daytona Beach, Florida
- Atlanta, Georgia
- Chicago Ridge, Illinois
- Bethesda, Maryland
- Boston, Massachusetts
- West Bloomfield, Michigan
- Omaha, Nebraska
- New York, New York
And 9 more locations — see the full list below.
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 10, 2026 · Source of record for eligibility and locations