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JANX007

Phase 1

Prostate Cancer | Biologics | Oncology |Janux Therapeutics, Inc.|Trials Updated: Oct 29, 2026

JANX007 development status

Highest phase Phase 1
Registered trials 2 across 1 sponsor since Aug 2022

JANX007 target and mechanism

Molecular targetPSMA
ModalityBiologics

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment272

FDA Designations

No designations recorded

JANX007 clinical trials

JANX007 · 1 trial · 3 indications

Phase 1 1
NCT05519449Study of JANX007 in Subjects With Metastatic Castration-Resistant Prostate Cancer (ENGAGER-PSMA-01)Prostate Cancer
RECRUITING272 Analytics
PHASE1RECRUITING
Study of JANX007 in Subjects With Metastatic Castration-Resistant Prostate Cancer (ENGAGER-PSMA-01)
Prostate CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Incidence of Dose Limiting Toxicities (DLT)
3 years
Incidence of Adverse Events (AE) and Serious Adverse Events (SAE)
3 years

Secondary Endpoints

Area under the concentration time curve to infinity of JANX007 (AUC0-inf)
Pre-dose and at multiple timepoints post-dose on Days 1, 2, 4, 8, 9, 15, 16, 18 up to end of treatment (Up to 3 years)
Maximum observed concentration of JANX007 (Cmax)
Pre-dose and at multiple timepoints post-dose on Days 1, 2, 4, 8, 9, 15, 16, 18 up to end of treatment (Up to 3 years)
Number of participants who develop anti-drug antibodies against JANX007
Up to 3 years
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Dose EscalationEXPERIMENTALIV dosing during 21- or 28-day cycles. Dosage per cohort will increase to determine the maximum tolerable dose.
Backfill ExpansionEXPERIMENTALIV dosing during 21- or 28-day cycles. Subjects will be dosed at levels previously declared tolerable.
Monotherapy Expansion Parts A - DEXPERIMENTALIV dosing during 21- or 28-day cycles. Subjects will be dosed at preliminary recommended phase 2 dose (RP2D).
Combination ExpansionEXPERIMENTALIV dosing during 21- or 28-day cycles. Subjects will be dosed at preliminary recommended phase 2 dose

Interventions

NameTypeDescription
JANX007BIOLOGICALJANX007 is dosed via IV in a 21- or 28-day cycle.
DarolutamideDRUGDarolutamide is dosed via oral tablets
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Eligibility Criteria

Age Range18 Years to 100 Years
SexMALE
Healthy VolunteersNo
Study Sites38

Inclusion Criteria: * Male ≥18 years of age at the time of signing informed consent * Histologically or cytologically confirmed adenocarcinoma of the prostate * For Dose Escalation and Backfill: Having mCRPC that progressed after at least one novel anti-androgen therapy and at least one taxane cont...

Countries:United StatesAustraliaSpain
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Competitive Landscape -Prostate Cancer 425 trials

Top 20 of 56 competitors

CompanyTickerTrialsLead PhaseDrugs
AstraZeneca PLCAZN28PHASE3Olaparib, Saruparib, Capivasertib, Actinium zadavotide guraxetan, FPI-2265
Pfizer Inc.PFE13PHASE3Talazoparib, PF-06821497, enzalutamide, Prifetrastat, Palbociclib
Merck & Co., Inc.MRK12PHASE3Ifinatamab Deruxtecan, Opevesostat, Pembrolizumab, Olaparib, Patritumab Deruxtecan
Johnson & JohnsonJNJ25PHASE3Apalutamide, Niraparib, Abiraterone, JNJ-101556143, Pasritamig
Eli Lilly and CompanyLLY9PHASE3Abemaciclib, PNT2002, LY4101174, PSMA-62, LY4052031
Amgen Inc.AMGN7PHASE3Xaluritamig, AMG 509
Novartis AG Sponsored ADRNVS35PHASE3Lutetium Lu 177 Vipivotide Tetraxetan, Gallium Ga 68 Gozetotide, gallium gozetotide, AAA817, Luxdegalutamide
Bristol-Myers Squibb CompanyBMY4PHASE3BMS-986365, Nivolumab, BMS-986253, RYZ711, BMS-986460
Exelixis, Inc.EXEL6PHASE3Cabozantinib, Zanzalintinib
Candel Therapeutics, Inc.CADL3PHASE3aglatimagene besadenovec
GSK plc Sponsored ADRGSK3PHASE3Risvutatug rezetecan, GSK5471713, GSK5458514
BioNTech SE Sponsored ADRBNTX1PHASE3BNT324
Telix Pharmaceuticals Limited Sponsored ADRTLX2PHASE368Ga-PSMA-11, 177Lu-TLX591
Regeneron Pharmaceuticals, Inc.REGN6PHASE2Cemiplimab, REGN21353, Nezastomig, Sarilumab Prophylaxis, REGN4336
Oric Pharmaceuticals, Inc.ORIC2PHASE3Rinzimetostat
Sanofi SA Sponsored ADRSNY2PHASE3Docetaxel, Cabazitaxel
Lantheus Holdings IncLNTH4PHASE3LNTH-2401
BayerBAYRY16PHASE3Darolutamide, Association of darolutamide and EBRT, BAY3546828
Xencor, Inc.XNCR1PHASE2vudalimab
Monte Rosa Therapeutics, Inc.GLUE2PHASE2MRT-2359
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Recent Changes (Last 90 Days)

LOWOct 29, 2026NCT05519449lastUpdatePostDate: changed
LOWOct 29, 2026NCT05519449lastUpdatePostDate: changed
LOWAug 14, 2026NCT05519449lastUpdatePostDate: changed
LOWAug 14, 2026NCT05519449lastUpdatePostDate: changed
LOWAug 14, 2026NCT05519449lastUpdatePostDate: changed

Frequently asked questions about JANX007

What is JANX007 used for?

JANX007 is an investigational therapy being developed for prostate cancer, including metastatic castration-resistant prostate cancer. It is a monoclonal antibody that targets PSMA and is being studied in adult male patients with these advanced prostate cancer conditions.

What does JANX007 target?

JANX007 targets PSMA, or prostate-specific membrane antigen. It is a monoclonal antibody directed at this target, and it is being developed as an investigational treatment for prostate cancer, including metastatic castration-resistant prostate cancer.

Who is developing JANX007?

JANX007 is being developed by Janux Therapeutics, Inc., which trades under the ticker JANX. The company is running the clinical development program for this PSMA-targeting monoclonal antibody in prostate cancer.

What phase is JANX007 in?

JANX007 is in Phase 1 clinical development. It is an investigational agent and is not described as approved; its only listed trial is a Phase 1 study that is currently recruiting participants.

What clinical trial is JANX007 in?

JANX007 is being studied in the ENGAGER-PSMA-01 trial, registered as NCT05519449. This Phase 1 study enrolls adults aged 18 years and older with metastatic castration-resistant prostate cancer and other prostate cancer conditions, and it is recruiting in the United States, Australia, and Spain.

How many patients are enrolled in the JANX007 trial?

The ENGAGER-PSMA-01 trial of JANX007, NCT05519449, has a planned enrollment of 272 participants. It is a controlled Phase 1 study in adult male patients with metastatic castration-resistant prostate cancer and related prostate cancer conditions.