Targeted alpha therapy for B7-H3 expressing solid tumors using AKY-2519
Official title: BActinium-2: A Phase 1b, 2 Part, Multicenter, Open Label Study to Evaluate the Safety and Efficacy of Intravenous Administration of a B7-H3 Radiopharmaceutical ([225Ac]Ac AKY 2519) in Participants With B7-H3 Imaging Positive Solid Tumors
Run by Aktis Oncology, Inc. · NCT07887971 · Data updated 2026-11-12
This phase 1b trial tests a radiolabeled drug (AKY-2519) to see if it's safe and tolerable in adults with B7-H3 positive advanced solid tumors, including NSCLC and SCLC, with imaging to help guide use.
Quick facts
| Phase | Phase 1 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 152 (estimated) |
| Sponsor | Aktis Oncology, Inc. Industry-sponsored |
| Drugs / interventions | chemotherapy, immunotherapy |
| Locations | 2 sites (Miami, Florida and 1 other locations) |
| Status | Recruiting |
| Started | November 2026 |
| Main results expected | December 2028 |
| Study ends | December 2033 |
| Registry record updated | November 2, 2026 |
| Trial ID | NCT07887971 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adult patients (≥18) with histologically confirmed locally advanced or metastatic NSCLC, ES-SCLC, HNSCC, ESCC, CRC, or prostate adenocarcinoma and at least one measurable lesion.
✕Probably not a fit
Patients with incompatible tumor type, rapidly progressing disease, or contraindications to radiopharmaceuticals may not benefit.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is a two-part, multi-center, open-label study designed to assess safety, tolerability, dosimetry, and pharmacokinetics of both imaging and therapeutic forms of AKY-2519 in adults with B7-H3 positive solid tumors. Part 1 uses escalating doses of the therapeutic [225Ac]Ac-AKY-2519 to determine a safe dose level across several tumor types, with a backfill strategy to refine dose selection. Part 2 expands to evaluate preliminary efficacy in two cohorts: NSCLC and other solid tumors, using the chosen dose level. The study also incorporates [64Cu]Cu-AKY-2519 for imaging to correlate uptake with response. Eligible patients have measurable disease, good performance status, and adequate organ function, with specific exclusions for prior related therapies and cardiac conditions.
Why it matters
Potential benefit: If successful, participants may experience tumor control and receive personalized imaging guidance for future therapies.
How similar studies have gone: Prior studies of targeted radiopharmaceuticals have shown anti-tumor signals in select solid tumors, but this specific B7-H3–targeted alpha therapy is exploratory.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Age ≥ 18 years * Histologic or cytologic confirmation of locally advanced or metastatic NSCLC, ES-SCLC, HNSCC, ESCC, CRC or prostatic adenocarcinoma * Radiologic confirmation on CT of at least one measurable tumor lesion per RECIST v1.1 * ECOG Performance Status of 0 or 1 * Adequate end-organ function * Ability to give informed consent and comply with study requirements * Patients with CNS metastases are eligible if they have received therapy and are neurologically stable, asymptomatic and not receiving corticosteroids Exclusion Criteria: * Prior treatment with a B7-H3 targeted therapy * Prior treatment with a targeted radiotherapy * Received an investigational agent within the previous 28 days * Prior treatment with a cytotoxic chemotherapy, targeted therapy, biologic agent, immunotherapy or external-beam radiotherapy within the previous 28 days * Impaired cardiac function or clinically significant cardiac disease * Concurrent serious medical condition that would impair study participation or impact the assessment of treatment related toxicity
Where it's running
-
Biogenix Molecular, LLC
Miami, Florida, United States Recruiting -
MD Anderson Cancer Center
Houston, Texas, United States Recruiting
Study contacts
- Study coordinator: TIffany Wang, MD
- Email: AKY-2519-02inquiries@aktisoncology.com
- Phone: 857-239-5333
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.