Clinical trial Recruiting at 2 sites Phase 1 Interventional Ages 18 and up

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

PhasePhase 1
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment152 (estimated)
SponsorAktis Oncology, Inc.
Industry-sponsored
Drugs / interventionschemotherapy, immunotherapy
Locations2 sites (Miami, Florida and 1 other locations)
StatusRecruiting
StartedNovember 2026
Main results expectedDecember 2028
Study endsDecember 2033
Registry record updatedNovember 2, 2026
Trial IDNCT07887971 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

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.