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STAT3 Inhibitor WP1066

Phase 2

Glioblastoma, IDH-Wildtype | Small molecule | Oncology |Moleculin Biotech, Inc.|Last Updated: Jul 22, 2026

Target and mechanism

Molecular targetSTAT3
Target classTranscription Factor
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment39

FDA Designations

No designations recorded

Clinical trial landscape

STAT3 Inhibitor WP1066 · 1 trial · 2 indications

Phase 2 1
NCT05879250WP1066 and Radiation Therapy in Treating Patients With Newly Diagnosed GlioblastomaGlioblastoma, IDH-Wildtype
RECRUITING39 Analytics
PHASE2RECRUITING
WP1066 and Radiation Therapy in Treating Patients With Newly Diagnosed Glioblastoma
Glioblastoma, IDH-WildtypeUnlock trial analytics

Study Endpoints

Primary Endpoints

Progression-Free Survival (PFS) (Cohort 1)
From subject registration to the earlier of the day of first documented disease progression or death from any cause, assessed up to 36 months post-registration

For PFS analysis, disease progression is defined as progressive disease (PD) per Response Assessment in Neuro-Oncology (RANO) criteria Will be summarized using the Kaplan-Meier method.

Tumor microenvironment activation and cluster interactions (Cohort 2)
Up to 36 months post-registration

Secondary Endpoints

Overall Survival (OS)
From the date of initial diagnosis until death from any cause, assessed up to 36 months
Overall Response Rate (ORR)
Up to 36 months post-registration
Duration of response (DOR)
Up to 36 months post-registration
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Cohort I (WP1066, radiation)EXPERIMENTALPatients whose tumor was completely removed at the time of initial surgery receive WP1066 PO for 6 weeks during routine radiation therapy, and then for twelve 28-day cycles on study. Patients also undergo MRI and collection of blood samples throughout the trial.
Cohort II (WP1066, radiation, surgery)EXPERIMENTALPatients whose tumor was not fully removed at the time of initial surgery receive WP1066 PO for 6 weeks during routine radiation therapy on study. Patients may then undergo possible surgery or open biopsy if eligible, followed by twelve 28-day cycles of WP1066 PO on study. Patients also undergo MRI and collection of blood samples throughout the trial.

Interventions

NameTypeDescription
Biospecimen CollectionPROCEDUREUndergo collection of blood
Magnetic Resonance ImagingPROCEDUREUndergo MRI
Radiation TherapyRADIATIONUndergo routine radiation therapy
STAT3 Inhibitor WP1066DRUGGiven PO
Surgical ProcedurePROCEDUREUndergo removal or biopsy of tumor
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites2

Inclusion Criteria: * Newly diagnosed, histologically confirmed World Health Organization (WHO) glioblastoma multiforme (GBM), IDH wild-type * External pathology reports are permitted for confirmation of histological diagnosis * Documentation of isocitrate dehydrogenase (IDH) wild-type status ...

Countries:United States
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Recent Changes (Last 90 Days)

LOWJul 22, 2026NCT05879250lastUpdatePostDate: changed
LOWJul 22, 2026NCT05879250lastUpdatePostDate: changed

Frequently asked questions about STAT3 Inhibitor WP1066

What is STAT3 Inhibitor WP1066 used for?

STAT3 Inhibitor WP1066 is an investigational small molecule being studied for the treatment of newly diagnosed glioblastoma, specifically IDH-wildtype and MGMT-unmethylated glioblastoma. It is currently in Phase 2 clinical development and has not been approved by the FDA.

What does STAT3 Inhibitor WP1066 target?

STAT3 Inhibitor WP1066 targets STAT3, a transcription factor involved in cancer cell growth and survival. By inhibiting STAT3, the drug aims to block tumor-promoting signaling pathways in glioblastoma.

Who makes STAT3 Inhibitor WP1066?

STAT3 Inhibitor WP1066 is being developed by Moleculin Biotech, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol MBRX.

What phase is STAT3 Inhibitor WP1066 in?

STAT3 Inhibitor WP1066 is in Phase 2 clinical development. It is an investigational drug and has not received FDA approval. The ongoing Phase 2 trial is actively recruiting patients.

What clinical trials is STAT3 Inhibitor WP1066 in?

STAT3 Inhibitor WP1066 is being evaluated in a single Phase 2 clinical trial, NCT05879250, titled 'WP1066 and Radiation Therapy in Treating Patients With Newly Diagnosed Glioblastoma.' The trial is recruiting 39 participants in the United States and is not randomized or double-blind.