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Actinium zadavotide guraxetan

Phase 3

Metastatic Castration-resistant Prostate Cancer | Small molecule | Oncology |AstraZeneca PLC|Trials Updated: Oct 19, 2026

Actinium zadavotide guraxetan target and mechanism

ModalitySmall molecule

Also known as Actinium (225Ac) zadavotide guraxetan (AZD2265 [FPI-2265])

Success Probability

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Market & Valuation

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Trial Design

RandomizedACTIVE_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment670

FDA Designations

No designations recorded

Actinium zadavotide guraxetan clinical trials

Actinium zadavotide guraxetan · 1 trial · 1 indication

Phase 3 1
NCT07611110AZD2265 Compared With Standard of Care in PSMA-positive Metastatic Castration-resistant Prostate Cancer (VECTRA-01)Metastatic Castration-resistant Prostate Cancer
RECRUITING670 Analytics
PHASE3RECRUITING
AZD2265 Compared With Standard of Care in PSMA-positive Metastatic Castration-resistant Prostate Cancer (VECTRA-01)
Metastatic Castration-resistant Prostate CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Radiographic Progression-Free Survival (rPFS)
From randomization until first radiographic progression per RECIST 1.1/PCWG3 by BICR, or death from any cause, whichever occurs first (up to approximately 33 months)

rPFS is defined as the time from randomisation to radiographic progression, as assessed by the BICR per RECIST 1.1 (soft tissue) and/or PCWG3 criteria (bone), or death due to any cause.

Overall Survival (OS)
From randomization until death from any cause (up to approximately 33 months)

OS is defined as the length of time from randomisation until the date of death due to any cause.

Secondary Endpoints

Progression-Free Survival (PFS)
From randomization until first documented progression (radiographic, clinical, or PSA progression) or death in the absence of progression, whichever occurs first (up to approximately 33 months)
Assessment of PSA50 (≥50% prostate-specific antigen reduction)
From C1D1, assessed each treatment cycle then every 8 weeks after EOT until BICR-assessed radiographic progression per RECIST 1.1/PCWG3 (up to approximately 33 months)
Assessment of PSA90 (≥90% prostate-specific antigen reduction)
From C1D1, assessed each treatment cycle then every 8 weeks after EOT until BICR-assessed radiographic progression per RECIST 1.1/PCWG3 (up to approximately 33 months)
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Study Design & Arms

AllocationRANDOMIZED
MaskingSINGLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Arm AEXPERIMENTALActinium (225Ac) zadavotide guraxetan (AZD2265 \[FPI-2265\])
Arm BACTIVE_COMPARATORInvestigator's choice of cabazitaxel, ARPI, or radium-223

Interventions

NameTypeDescription
Actinium (225Ac) zadavotide guraxetan (AZD2265 [FPI-2265])DRUGIV
CabazitaxelDRUGIV in combination with oral prednisone/prednisolone
AbirateroneDRUGOral in combination with prednisone/prednisolone
EnzalutamideDRUGOral
ApalutamideDRUGOral; Available only to participants randomized under Protocol Version 2.0; not offered to participants randomized under Protocol Version 3.0 (04 June 2026)
DarolutamideDRUGOral; Available only to participants randomized under Protocol Version 2.0; not offered to participants randomized under Protocol Version 3.0 (04 June 2026)
DeutenzalutamideDRUGOral; available in China only
Radium-223DRUGIV
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Eligibility Criteria

Age Range18 Years to N/A
SexMALE
Healthy VolunteersNo
Study Sites151

Inclusion Criteria: * ≥ 18 years of age. * Diagnosis of adenocarcinoma of prostate. * Must have had prior orchiectomy and/or ongoing ADT and a castrate level of plasma/serum testosterone. * Progressive mCRPC following the most recent treatment at the time of study entry, with at least 1 metastatic ...

Countries:United StatesAustraliaAustriaBelgiumBrazilCanadaChinaFinlandFranceGermanyIndiaIsraelItalyJapanNetherlandsPolandSouth KoreaSpainSwedenSwitzerlandTaiwanThailandTurkey (Türkiye)United Kingdom
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Recent Changes (Last 90 Days)

LOWOct 19, 2026NCT07611110lastUpdatePostDate: changed
LOWOct 19, 2026NCT07611110lastUpdatePostDate: changed
LOWOct 19, 2026NCT07611110lastUpdatePostDate: changed
MEDIUMAug 26, 2026NCT07611110primaryCompletionDate: changed
MEDIUMAug 26, 2026NCT07611110primaryCompletionDate: changed

Frequently asked questions about Actinium zadavotide guraxetan

What is Actinium zadavotide guraxetan used for?

Actinium zadavotide guraxetan is being developed for metastatic castration-resistant prostate cancer, specifically in patients whose tumors are PSMA-positive. It is an oncology candidate in Phase 3 testing and is not yet available as a marketed treatment.

Who is developing Actinium zadavotide guraxetan?

AstraZeneca PLC (ticker AZN) is developing Actinium zadavotide guraxetan. The company is running the Phase 3 VECTRA-01 study of the agent in PSMA-positive metastatic castration-resistant prostate cancer.

What phase is Actinium zadavotide guraxetan in?

Actinium zadavotide guraxetan is in Phase 3 clinical development. It is an investigational agent and has not completed the pivotal testing needed for regulatory review. Its only registered trial, VECTRA-01, is currently recruiting participants.

What clinical trial is Actinium zadavotide guraxetan in?

Actinium zadavotide guraxetan is being studied in the Phase 3 VECTRA-01 trial, NCT07611110, which compares AZD2265 with standard of care in PSMA-positive metastatic castration-resistant prostate cancer. The trial is recruiting 670 male participants aged 18 and older across sites in the United States, Europe, Asia, Latin America, and Australia.

Is Actinium zadavotide guraxetan the same as AZD2265 or FPI-2265?

Yes. Actinium zadavotide guraxetan is also known as Actinium (225Ac) zadavotide guraxetan, AZD2265, and FPI-2265. These names refer to the same AstraZeneca development candidate, and AZD2265 is the designation used in the VECTRA-01 trial title.

How is the VECTRA-01 trial of Actinium zadavotide guraxetan designed?

VECTRA-01, NCT07611110, is a randomized, active-controlled Phase 3 trial with planned enrollment of 670 patients. It enrolls male participants aged 18 years and older with PSMA-positive metastatic castration-resistant prostate cancer and is recruiting across 25 countries, including the United States, United Kingdom, Germany, Japan, China, and Brazil.