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.
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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
24
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
Evaluate efficacy of luveltamab tazevibulin monotherapy
Complete remission rate
Time frame: Up to 12 weeks
Assess additional efficacy outcome measures
• Duration of CR
Time frame: Up to 2 years
Evaluate safety measures
Incidence and severity of AEs and clinical laboratory abnormalities per NCI CTCAE v5.0 in patients receiving luveltamab tazevibulin monotherapy.
Time frame: Up to 2 years
To characterize the PK of luveltamab tazevibulin
Concentration of luveltamab tazevibulin (ADC, TAb, and SC209) in the blood.
Time frame: Up to 2 years
Assess the immunogenic potential of luveltamab tazevibulin
Incidence of ADAs
Time frame: Up to 2 years
Assess additional efficacy outcome measures
• Response rate including complete remission with partial hematologic recovery (CRh) rate \[CR = CRh\]
Time frame: Up to 2 years
Assess additional efficacy outcome measures
• Event-free survival (EFS)
Time frame: Up to 2 years
Assess additional efficacy outcome measures
• Relapse-free survival (RFS)
Time frame: Up to 2 years
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Childrens Hospital of Alabama
Birmingham, Alabama, United States
Childrens Hospital of Los Angeles
Los Angeles, California, United States
Lucile Packard Childrens Hospital-Stanford
Palo Alto, California, United States
Children's Hospital of Colorado
Aurora, Colorado, United States
Childrens National Hospital
Washington D.C., District of Columbia, United States
Children's Hospital of Atlanta-Emory
Atlanta, Georgia, United States
Ann & Robert H. Lurie Childrens Hospital
Chicago, Illinois, United States
Dana-Farber Cancer Institute
Boston, Massachusetts, United States
University of Minnesota-Masonic Cancer Center
Minneapolis, Minnesota, United States
Children's Mercy Hospital
Kansas City, Missouri, United States
...and 26 more locations
Assess additional efficacy outcome measures
• Overall survival (OS)
Time frame: Up to 2 years