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NCT07673627PHASE2Recruiting

ADAPT Forward 2 - ISA2 - a Study to Evaluate the Safety, Tolerability and Efficacy of Empasiprubart IV Monotherapy in Participants With AChR-Ab Seropositive Generalized Myasthenia Gravis

argenx

Start Date

7/10/2026

Completion Date

4/1/2028

Summary

This study is part of the ADAPT Forward platform study (NCT07294170). ADAPT Forward is a platform study with the aim to look at how safe different drugs are and how well they work for people with myasthenia gravis. The goal is to find the best therapeutic approach to reduce patients' side effects and improve their quality of life. The aim of this ISA2 is to investigate the effects of empasiprubart in participants with AChR-Ab seropositive generalized myasthenia gravis (gMG). The ADAPT Forward master protocol is registered on https://clinicaltrials.gov/study/NCT07294170 More information can be found here: https://clinicaltrials.argenx.com/adaptforward2

Detailed Description

Once the master protocol and ISA2 screening periods are completed, eligible participants will be randomized to receive empasiprubart IV or placebo in the double-blinded treatment period (DBTP). All participants will then receive open-label efgartigimod PH20 SC PFS in the safety follow-up period. The study duration for each participant is approximately up to 45 weeks.

Eligibility Criteria

Age Range: 18 years to No maximum

Inclusion Criteria: * Is seropositive for anti-acetylcholine receptor antibodies (AChR-Ab). * Has confirmed diagnosis of gMG and is Myasthenia Gravis Foundation of America (MGFA) Class II, III, IVa, or IVb. * Has documented immunization against encapsulated bacterial pathogens (Neisseria meningitidis and Streptococcus pneumoniae) within 5 years before ISA screening or will complete immunization at least 14 days before the first IMP administration. Exclusion Criteria: * Clinical diagnosis of systemic lupus erythematosus (SLE). * Is receiving concurrent complement inhibitors (eg, eculizumab, zilucoplan, ravulizumab, or others). Participants who received zilucoplan or eculizumab \>2 months or ravulizumab \>6 months before baseline are allowed to participate. * Has received an FcRn antagonist, including efgartigimod, within 4 weeks before baseline. * Had prior empasiprubart exposure.

Interventions

BIOLOGICAL

Empasiprubart IV

OTHER

Placebo IV

COMBINATION_PRODUCT

Efgartigimod PH20 SC PFS

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Conditions

AChR-Ab Seropositive Generalized Myasthenia GravisMyasthenia Gravis (MG)MG - Myasthenia GravisgMG

Locations

Visionary Investigators Network

Miami, Florida 33176-2148

United States

Erlanger Health System

Chattanooga, Tennessee 37403-2136

United States