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
ISA2 to Master Protocol ARGX-999-2-MG-2000 - an Exploratory, Phase 2a, Randomized, Double-Blinded, Placebo-Controlled Study to Evaluate the Safety, Tolerability, and Efficacy of Empasiprubart IV Monotherapy in Participants With AChR-Ab Seropositive Generalized Myasthenia Gravis
- AChR-Ab Seropositive Generalized Myasthenia Gravis
- Myasthenia Gravis (MG)
- MG - Myasthenia Gravis
- gMG
At a glance
- Phase
- Phase 2
- Study type
- Interventional
- Sponsor
- argenx
- Enrolment target
- 40
- Started
- 10 July 2026
- Main results due
- October 2027
- Study sites
- 4
- Registry updated
- 24 September 2026
Can you take part?
- Aged 18 years and over.
- Open to any sex.
- You need the condition being studied — healthy volunteers are not accepted.
These are the headline rules only. Every study has a longer list, and whether you are eligible is decided by the research team at the site — never by this page.
Read the full eligibility criteria
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.
What this study is about
In the sponsor’s own words, from the registry.
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
Study sites(4)
Visionary Investigators Network
Miami, Florida, United States
Recruiting
Dent Neurologic Institute - Amherst
Amherst, New York, United States
Recruiting
Erlanger Health System
Chattanooga, Tennessee, United States
Recruiting
National Neuromuscular Research Institute
Austin, Texas, United States
Recruiting
Showing 4 of 4 sites. 4 of the 4 sites on this study are recruiting right now — a site can stop enrolling while the study as a whole is still open.
Source: ClinicalTrials.gov record NCT07673627. Trialion does not run this study, is not paid to refer anyone to it, and cannot enrol you. Eligibility is always decided by the research team at the site.
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