Overview
This is an open label, phase I/II, multi-center study in adult participants with metastatic hormone sensitive prostate cancer (mHSPC) and with metastatic castration resistant prostate cancer (mCRPC) who have received prior anti-cancer treatment and have a positive 68Ga-PSMA-11 PET scan. The purpose of this study is to learn if the study drug, [225Ac]Ac-PSMA-R2, is safe and tolerable, and has anti-tumor activity in treated patients.
Description
The study contains three groups (Group 1, Group 2, and Group 3). Each group has a dose escalation part at a specific dosing schedule followed by a dose expansion part. The dose escalation parts in each group within each dosing schedule will establish the maximum tolerated dose or the recommended dose for expansion (MTDs/RDEs) of the 225Ac-PSMA-R2. Dose escalation decisions will be made by the Investigators and Novartis during dose escalation meetings (DEMs) based on safety and tolerability information. The dose expansion parts in each group group/dosing schedule will assess the anti-tumor activity in the mHSPC and mCRPC populations.
Eligibility
Key Inclusion Criteria:
- Evidence of PSMA-positive disease by 68Ga-PSMA-11 PET/CT and eligible as determined by central reading
- Documented progressive mCRPC or mHSPC
- Adequate organ function
- Prior orchiectomy or ongoing ADT and should have received prior 177Lu-PSMA-RLT (Group1 dose escalation & expansion) or never received 177Lu-PSMA-RLT (Group 2 and Group 3 dose escalation & expansion).
Key Exclusion Criteria:
- Any other investigational agents within 28 days of the anticipated C1D1 of 225Ac-PSMA-R2 therapy
- Any systemic anti-cancer therapy within 28 days of the anticipated C1D1 of 225Ac-PSMA-R2 therapy
- Uncontrolled pain or incompatibility that may result in participant's lack of ability to comply with imaging procedures
- History of CNS metastases and symptomatic cord compression, or clinical or radiologic findings indicative of impending cord compression
- History of myocardial infarction, angina pectoris, or coronary artery bypass graft within 6 months prior to ICF signature and/or clinically active significant cardiac disease
- Diagnosis of other malignancies in the past three years expected to alter life expectancy or may interfere with disease assessment
Other protocol-defined inclusion/exclusion criteria may apply.