Amgen, 20230005, Ph3, Rand, Prostate Ca, Xaluritamig vs Cabazitaxel or 2nd ARDT

What is the Purpose of this Study?

Primary Objective: 1. To compare overall survival (OS) in subjects receiving xaluritamig vs investigator s choice (cabazitaxel or second androgen receptor-directed therapy [ARDT]) Secondary Objectives: 1. To compare radiographic progression-free survival (rPFS) in subjects receiving xaluritamig vs investigator s choice (cabazitaxel or second ARDT) 2. To evaluate other measures of efficacy of xaluritamig vs investigator s choice (cabazitaxel or second ARDT) 3. To compare symptomatic skeletal events (SSE) in subjects treated with xaluritamig vs investigator s choice (cabazitaxel or second ARDT) 4. To evaluate the safety and tolerability of xaluritamig vs investigator s choice (cabazitaxel or second ARDT) 5. To evaluate the health-related quality of life (HRQoL) of xaluritamig vs investigator s choice (cabazitaxel or second ARDT)

Eligibility

* Participant has provided informed consent prior to initiation of any study-specific activities/procedures.
* Age ≥ 18 years (or ≥ legal age within the country if it is older than 18 years) at the time of signing the informed consent.
* Participant must have histological, pathological, and/or cytological confirmation of adenocarcinoma of the prostate. Mixed histologies (eg, adenocarcinoma with neuroendocrine component) are not permitted.
* mCRPC with ≥ 1 metastatic lesion that is present on baseline computed tomography (CT), magnetic resonance imaging (MRI), or bone scan imaging obtained within 28 days prior to enrollment.

Inclusion Criteria:

* Participant has provided informed consent prior to initiation of any study-specific activities/procedures.
* Age ≥ 18 years (or ≥ legal age within the country if it is older than 18 years) at the time of signing the informed consent.
* Participant must have histological, pathological, and/or cytological confirmation of adenocarcinoma of the prostate. Mixed histologies (eg, adenocarcinoma with neuroendocrine component) are not permitted.
* mCRPC with ≥ 1 metastatic lesion that is present on baseline computed tomography (CT), magnetic resonance imaging (MRI), or bone scan imaging obtained within 28 days prior to enrollment.
* Evidence of progressive disease, defined as 1 or more PCWG3 criteria:
* Serum PSA progression defined as 2 consecutive increases in PSA over a previous reference value measured at least 1 week prior. The minimal start value is 2.0 ng/mL.
* Soft-tissue progression defined as an increase ≥ 20% in the sum of the diameter (SOD) (short axis for nodal lesions and long axis for non-nodal lesions) of all target lesions based on the smallest SOD since treatment started or the appearance of one or more new lesions or unequivocal progression of existing non-target lesions.
* Progression of bone disease: defined by the appearance of at least 2 new bone lesion(s) by bone scan (as per the 2+2 PCWG3 criteria).
* Participants must have had a prior orchiectomy and/or ongoing androgen-deprivation therapy and a castrate level of serum testosterone (\< 50 ng/dL or \< 1.7 nmol/L).
* Prior progression on at least one ARDT (enzalutamide, abiraterone, apalutamide, darolutamide).
* Prior treatment with only one taxane therapy in the mCRPC setting. Note: Prior treatment with docetaxel in the metastatic hormone-sensitive prostate cancer (mHSPC) setting is permitted; however, participants must have also received one, and only one, taxane therapy in the mCRPC setting.
* Eastern Cooperative Oncology Group performance status (ECOG PS) of 0 or 1.
* Adequate organ function.
* Life expectancy of ≥ 12 weeks per the treating physician's assessment.

Key Exclusion Criteria:

Prior \& Concomitant Therapy:
* Prior six transmembrane epithelial antigen of the prostate 1 (STEAP1)-targeted therapy.
* Any anticancer therapy, immunotherapy, or investigational agent within 4 weeks prior to the first dose of study treatment, not including androgen receptor pathway inhibitors (ARPIs) (abiraterone, enzalutamide, darolutamide, apalutamide): minimum washout of 2 weeks prior to the first dose of study treatment and androgen suppression therapy (eg, luteinizing hormone-releasing hormone/gonadotropin-releasing hormone \[LHRH/GnRH\] analogue \[agonist/antagonist\]).
* Prior Prostate-Specific Membrane Antigen (PSMA) radioligand therapy (RLT) within 3 months of the first dose of study treatment unless participants received \< 2 cycles of therapy.
* Prior palliative radiotherapy within 2 weeks of first dose of study treatment. Participants must have recovered from all radiation-related toxicities.
* Concurrent cytotoxic chemotherapy, ARDT, immunotherapy, radioligand therapy, PARP inhibitor, biological therapy, investigational therapy. Note: Prior treatment with a PARP inhibitor is permitted as long as not within 4 weeks before first dose of study treatment.
* Prior radionuclide therapy (Radium-223) within 2 months of first dose of study treatment.
* Treatment with live and live-attenuated vaccines within 4 weeks before the first dose of study treatment.
Disease Related:
* Participants with a history of central nervous system (CNS) metastasis. Note: Participants with treated, asymptomatic, and clinically stable dural metastases are eligible.
* Unresolved toxicities from prior anti-tumor therapy not having resolved to CTCAE version 5.0 events grade above 1 or baseline, with the exception of alopecia or toxicities that are stable and well controlled AND there is an agreement to allow inclusion by both the investigator and the sponsor.

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Where can I participate?

CS Cancer at Beverly Hills : Maria Tarallo
CS Cancer at Cedars-Sinai Medical Center : Maria Tarallo

More about this Clinical Trial

What is the full name of this clinical trial?

20230005: A Phase 3, Open-label, Multicenter, Randomized Study of Xaluritamig vs Cabazitaxel or Second Androgen Receptor-Directed Therapy in Subjects with Metastatic Castration-Resistant Prostate Cancer Previously Treated with Chemotherapy

Study Details

Disease Type/Condition

Prostate

Principal Investigator

Posadas, Edwin

Co-Investigators

David Hoffman, Jeremy Lorber, Jun Gong, Kevin Scher

Age Group

Adult

Phase

III

IRB Number

STUDY00004397

ClinicalTrials.gov ID

NCT06691984

Key Eligibility

ClinicalTrials.gov

How do I learn more about this study?

Name

Maria Tarallo

Maria.Tarallo@cshs.org