This first-in-human, Phase 1/2, open-label study evaluates the safety, tolerability, pharmacokinetics, and preliminary antitumor activity of JSB462 (luxdegalutamide, previously ARV-766) administered as monotherapy and in combination with abiraterone in participants with metastatic prostate cancer. The study includes dose-escalation and cohort expansion components to determine the recommended Phase 2 dose and assess clinical activity.
Phase 1 trials primarily test safety and dosing in a small number of participants (typically 20–100). Results do not yet speak to efficacy. FDA approval is typically many years away from this stage.
Phase 2 trials begin testing efficacy in a larger patient group (100–300). This is often where biotech binary events occur — positive Phase 2 data can significantly advance a company's pipeline narrative, while failures can be terminal for a program.
Enrollment is complete. The trial is in its follow-up or data collection phase — a readout may occur on or near the primary completion date.
Novartis AG (NVS) is the sponsoring company for this trial. BiotechSign currently grades this company C (51/100) based on composite catalyst signals across its full pipeline. This trial is one data point in that overall catalyst picture.