Evaluating APR-1051 for advanced solid tumors

A Phase 1, Open-Label, Multicenter, First-In-Human Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of APR-1051 in Patients With Advanced Solid Tumors

PHASE1 · Aprea Therapeutics · NCT06260514

This study is testing a new oral medication called APR-1051 to see if it is safe and effective for people with advanced solid tumors.

Quick facts

PhasePHASE1
Study typeInterventional
Enrollment90 (estimated)
Ages18 Years and up
SexAll
SponsorAprea Therapeutics (industry)
Drugs / interventionsdenosumab, chemotherapy, immunotherapy, radiation
Locations3 sites (Houston, Texas and 2 other locations)
Trial IDNCT06260514 on ClinicalTrials.gov

What this trial studies

This study assesses the safety and effectiveness of APR-1051, an oral medication, in patients with advanced solid tumors. It is a Phase 1, open-label trial that focuses on determining the pharmacokinetics and preliminary efficacy of the drug. Participants will be monitored for adverse effects and overall response to the treatment. The study aims to gather essential data that could inform future phases of clinical development.

Who should consider this trial

Good fit: Ideal candidates include adults aged 18 and older with a diagnosis of advanced or metastatic solid tumors and adequate organ function.

Not a fit: Patients who have recently undergone systemic anti-cancer therapies may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could provide a new therapeutic option for patients with advanced solid tumors.

How similar studies have performed: While this approach is not widely tested, similar studies have shown promise in evaluating new treatments for advanced solid tumors.

Eligibility criteria

Show full inclusion / exclusion criteria
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 Performance Status (KPS) ≥ 70%
* Patients must have recovered to Grade 1 or baseline levels from toxicity or adverse events related to prior treatment for their cancer, excluding Grade ≤ 2 neuropathy, alopecia, or skin pigmentation
* Adequate bone marrow and organ function
* Women of child-bearing potential (WOCBP) or men of child-fathering potential must agree to use adequate contraception prior to study entry

Exclusion Criteria:

* Patient has had prior systemic anti-cancer therapy (cytotoxic chemotherapy, immunotherapy, targeted therapy) within 3 weeks (6 weeks in cases of mitomycin C, nitrosourea, lomustine) or at least 5 half-lives (whichever is shorter, but no less than 2 weeks) prior to Day 1
* Prior radiation therapy at the target lesion unless there is evidence of disease progression. If patient has had prior radiation therapy for disease progression, see Exclusion Criterion 1 for allowed interval between radiotherapy and Day 1 and recovery of AEs
* Treatment with any investigational agent administered within 30 days or 5 half-lives, whichever is shorter, before the first dose of APR-1051
* Major surgery within 21 days prior to Day 1
* Concomitant treatment with other anti-cancer therapy, including chemotherapy, immunotherapy, biological therapy, radiation therapy (except palliative local radiation therapy), or other novel anti-cancer agents. Note: endocrine therapy for breast and prostate cancer is allowed along with agents to treat or prevent skeletal related events (zoledronic acid, pamidronate, denosumab)
* Subjects with active (uncontrolled, metastatic) second malignancies or requiring therapy

Where this trial is running

Houston, Texas and 2 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Advanced Solid Tumor

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.