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APR-1051

Phase 1

Advanced Solid Tumor | Small molecule | Oncology |Aprea Therapeutics, Inc.|Last Updated: Aug 17, 2026

Target and mechanism

Molecular targetWEE1
Target classKinase
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment90

FDA Designations

No designations recorded

Clinical trial landscape

APR-1051 · 1 trial · 1 indication

Phase 1 1
NCT06260514Study of APR-1051 in Patients With Advanced Solid TumorsAdvanced Solid Tumor
RECRUITING90 Analytics
PHASE1RECRUITING
Study of APR-1051 in Patients With Advanced Solid Tumors
Advanced Solid TumorUnlock trial analytics

Study Endpoints

Primary Endpoints

Treatment-related adverse events
Day 1 to 28, each cycle is 28 days

* Part 1 dose escalation: Incidence of adverse Events (AE), serious AEs (SAE), treatment-related AEs, AEs that would qualify as a dose-limiting toxicity (DLT), changes in clinical laboratory values, vital signs, ECG, ECHO * Part 1 dose escalation: Severity of adverse Events (AE), serious AEs (SAE), treatment-related AEs, and changes in clinical laboratory values, vital signs, ECG, ECHO according to National Cancer Institute Common Terminology Criteria for Adverse Events v5.0

Recommended dose of APR-1051
Day 1 to 28, each cycle is 28 days

•Part 1 dose escalation: Recommended Phase 2 Dose (RP2D) of APR-1051 monotherapy \[Time frame: Day 1 through to start of dose expansion phase\]. The RP2D of will be determined based on review of safety, tolerability, pharmacokinetics/pharmacodynamics, and preliminary efficacy data

Secondary Endpoints

Pharmacokinetics: Cmax/Cmin of APR-1051
Day 1 to 112
Pharmacokinetics: Tmax of APR-1051
Day 1 to 112
Pharmacokinetics: AUC of APR-1051
Day 1 to 112
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
APR-1051EXPERIMENTALDose Escalation based on BOIN Design

Interventions

NameTypeDescription
APR-1051DRUGWEE1 Inhibitor
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites5

Inclusion Criteria: * Age ≥ 18 years * Diagnosis of advanced/metastatic solid tumor * Measurable or evaluable disease per RECIST version 1.1 (radiographic disease progression per PCWG3 criteria for patients with mCRPC) * Eastern Cooperative Oncology Group (ECOG) performance status ≤ 1 or Karnofsky ...

Countries:United States
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Competitive Landscape -Other Solid Tumors 9 trials (matched to "Advanced Solid Tumor")

Recent Changes (Last 90 Days)

LOWAug 17, 2026NCT06260514lastUpdatePostDate: changed
LOWAug 17, 2026NCT06260514lastUpdatePostDate: changed

Frequently asked questions about APR-1051

What is APR-1051 used for?

APR-1051 is an investigational small molecule being developed for the treatment of advanced solid tumors. It is currently in Phase 1 clinical development and is not yet approved by regulatory authorities.

What does APR-1051 target?

APR-1051 targets WEE1, a kinase involved in cell cycle regulation. By inhibiting WEE1, the drug aims to disrupt cancer cell division and growth, though its full mechanism and efficacy are still being studied in clinical trials.

Who is developing APR-1051?

APR-1051 is being developed by Aprea Therapeutics, Inc., a biopharmaceutical company. The company is listed on the stock exchange under the ticker symbol APRE.

What phase is APR-1051 in?

APR-1051 is in Phase 1 clinical development. It is an investigational drug, meaning it has not yet received regulatory approval and is still being evaluated for safety and efficacy in patients.

What clinical trials is APR-1051 in?

APR-1051 is being studied in a Phase 1 clinical trial with the identifier NCT06260514. This trial is recruiting patients with advanced solid tumors in the United States and aims to enroll approximately 90 participants aged 18 years and older.

Is APR-1051 the same as any other drug?

No alternative names for APR-1051 have been reported. It is a distinct investigational compound developed by Aprea Therapeutics, Inc., and is not known to be identical to any other marketed or investigational drug.