NCT06679582

Luveltamab Tazevibulin (STRO-002) in Infants and Children < 12 Years of Age With Relapsed/Refractory CBFA2T3::GLIS2 AML

A Phase 1/2, Open-label Study Evaluating the Efficacy, Safety, and Pharmacokinetics (PK) of Luveltamab Tazevibulin (STRO-002) in Infants and Children < 12 Years of Age With CBFA2T3::GLIS2 Acute Myeloid Leukemia (AML)

• Status: Terminated
• Phase: Phase 1 / Phase 2
• Study type: Interventional
• Enrollment: 24 (actual)
• Sponsor: Sutro Biopharma, Inc. · Industry
• Sex: All
• Age: 1 Day – 12 Years
• Healthy volunteers: Not accepted

Summary

This trial will evaluate whether luveltamab tazevibulin is well tolerated and active against a rare form of AML carrying a particular genetic abnormality called CBFA2T3::GLIS2 that arises in infants and children. To be treated in this trial children must have a leukemia which did not respond or recurred after prior treatment. Luveltamab tazevibulin is an antibody-drug conjugate, which brings tazevibulin, an anticancer drug, to a molecule called FOLR1, present on the surface of CBFA2T3::GLIS2 AML cells.

Detailed description

This is a registrational international, multicenter, two-part open label Phase 1/2 trial in an extremely rare pediatric disease (around 17 new patients a year in US and 10 in EU). Part 1 randomizes subjects 1:1 to one of two luveltamab tazevibulin dose cohorts (1a and 1b). Part 2 further evaluates the safety and the efficacy of the selected dose. Subjects who achieve complete remission after two cycles of treatment may continue luveltamab tazevibulin as monotherapy, while non-responders at PI discretion may add luveltamab tazevibulin with standard of care (SOC) AML treatments. Luveltamab tazevibulin is given IV every two week as monotherapy and every 4 weeks when given with chemotherapy.

Conditions

• Acute Myeloid Leukemia (AML)

Interventions

Type	Name	Description
DRUG	Luveltamab tazevibulin	Luveltamab tazevibulin is an antibody-drug conjugate (ADC) targeting folate receptor α (FRα or FOLR1). It consists of an IgG1 antibody (SP8166) conjugated to cathepsin cleavable 3-aminophenyl hemiasterlin payload, yielding a homogenous ADC with a drug antibody ratio of four. The active warhead (SC209) inhibits tubulin polymerization leading to mitotic arrest and cell death. Other Names: * STRO-002 * Luvelta

Timeline

• Start date: 2024-12-04
• Primary completion: 2025-06-01
• Completion: 2025-06-01
• First posted: 2024-11-07
• Last updated: 2025-08-24

Locations

36 sites across 9 countries: United States, Austria, Canada, Denmark, France, Germany, Italy, Netherlands, Spain

Regulatory

• FDA-regulated drug study