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AR Blockade

Phase 4

Castration-resistant Prostate Cancer | Small Molecules | Oncology |Kairos Pharma, Ltd.|Trials Updated: Oct 5, 2026

AR Blockade development status

Highest phase Phase 4 run by Janssen Research & Development, LLC (NCT04108208)
Phase scored for KAPAPhase 2
Registered trials 162 across 66 sponsors since Sep 2009

AR Blockade target and mechanism

ModalitySmall Molecules

Also known as Apalutamide, Enzalutamide

Success Probability

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Market & Valuation

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Trial Design

RandomizedACTIVE_CONTROLLEDDMC
Total Trials1
Total Enrollment116

FDA Designations

No designations recorded

AR Blockade clinical trials

AR Blockade · 1 trial · 1 indication

Phase 2 1
NCT05534646Study of AR Suppression With Carotuximab in Metastatic, Castration-Resistant Prostate CancCastration-resistant Prostate Cancer
RECRUITING116 Analytics
PHASE2RECRUITING
Study of AR Suppression With Carotuximab in Metastatic, Castration-Resistant Prostate Canc
Castration-resistant Prostate CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Progression free survival (rPFS) between patients receiving AR blockade and AR blockade + carotuximab
From the start of study treatment until documented progression, or death due to any cause, up to 30 days of follow-up after end of treatment.

From the start of study treatment until documented progression, per Response Evaluation Criteria in Solid Tumors (RECIST 1.1) and Prostate Cancer Working Group 3, or death due to any cause.

Secondary Endpoints

Incidence of Adverse events (grade 3 or higher) related to carotuximab and AR blockade
From start of study treatment through 4 weeks on treatment
Overall radiographic response rate (ORR) of the combination of AR blockade + carotuximab
From the start of combination study treatment until documented progression, or death due to any cause, up to 30 days of follow-up after end of treatment.
Proportion of patients resistant to AR blockade benefit from the addition of carotuximab
From the start of combination therapy study treatment until documented progression, or death due to any cause, up to 30 days of follow-up after end of treatment.
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Enzalutamide Naive - MonotherapyACTIVE_COMPARATORAfter progression, subjects will crossover to combination therapy
Enzalutamide Naive - Combination therapy (Androgen Receptor Blockade + Carotuximab)EXPERIMENTALAndrogen Receptor is Apalutamide 240mg for Lead-In group \& Enzalutamide 160mg for all other groups
Enzalutamide Exposed - Combination therapy (Androgen Receptor Blockade + Carotuximab)EXPERIMENTALAndrogen Receptor is Apalutamide 240mg for Lead-In group \& Enzalutamide 160mg for all other groups

Interventions

NameTypeDescription
AR BlockadeDRUGStandard of care Apalutamide 240 mg / Enzalutamide 160mg administered orally and daily on Days 1-28 of every 28 day cycle
CarotuximabDRUGCarotuximab administered intravenously at the following doses: Cycle 1 Day 1: 3 mg/kg Cycle 1 Day 4: 7 mg/kg Cycle 1 Day 8: 10 mg/kg Cycle 1 Day 15: 10 mg/kg Cycle 1 Day 22: 10 mg/kg Cycle 2 Day 1: 15 mg/kg Cycle 2 Day 15: 15 mg/kg Cycle 3+ Day 1: 15 mg/kg After completion of cycle 2, dosing of carotuximab will continue at a q4 week schedule using the 15 mg/kg dose.
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Eligibility Criteria

Age Range18 Years to N/A
SexMALE
Healthy VolunteersNo
Study Sites3

Inclusion Criteria: * History of castration-resistant prostate cancer with rising PSA on a contemporary ARSI (e.g. abiraterone or, enzalutamide, darolutamide). Bicalutamide, nilutamide, and flutamide will not be considered as contemporary ARSIs. * PSA rise will be defined as an increase in PSA o...

Countries:United States
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Recent Changes (Last 90 Days)

MEDIUMNov 10, 2026NCT05534646Enrollment: 100 → 116
MEDIUMNov 10, 2026NCT05534646Enrollment: 100 → 116
MEDIUMNov 10, 2026NCT05534646Enrollment: 100 → 116