Evaluating Efgartigimod PH20 SC in Adults with New-onset Generalized Myasthenia Gravis
Official title: A Phase 4, Open-Label, Prospective, Single-Group, Multicenter Study to Evaluate the Clinical Outcomes of Efgartigimod PH20 SC in Adult Participants With New-Onset Generalized Myasthenia Gravis
Run by argenx · NCT06909214 · Data updated 2026-11-12
This study is testing a new treatment called efgartigimod PH20 SC to see if it helps adults who have recently been diagnosed with generalized myasthenia gravis feel better.
Quick facts
| Phase | Phase 4 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 30 (estimated) |
| Sponsor | argenx Industry-sponsored |
| Locations | 18 sites (La Jolla, California and 17 other locations) |
| Status | Recruiting |
| Started | April 17, 2025 |
| Main results expected | August 2026 |
| Study ends | May 2027 |
| Registry record updated | March 10, 2026 |
| Trial ID | NCT06909214 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are adults aged 18 and older who have been diagnosed with gMG of MGFA class II, III, or IV and are seropositive for AChR-Ab.
✕Probably not a fit
Patients with a diagnosis of MGFA class I or V, those who have undergone thymectomy prior to screening, or those who have used systemic corticosteroids or immunosuppressive therapy for gMG will not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This study aims to assess the clinical outcomes of efgartigimod PH20 SC in adults diagnosed with new-onset generalized myasthenia gravis (gMG), specifically those who have experienced symptoms for less than one year. Participants will undergo a treatment period lasting 51 weeks, with the overall study duration for each individual being approximately 58 weeks. The study focuses on treatment-naive patients or those who have only received AChEI therapy for gMG. The effectiveness of the treatment will be measured through various clinical outcomes.
Why it matters
Potential benefit: If successful, this treatment could significantly improve the management and outcomes for patients with new-onset generalized myasthenia gravis.
How similar studies have gone: While this specific approach may be novel, similar studies evaluating treatments for generalized myasthenia gravis have shown promising results.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Is at least 18 years when signing the ICF * Has been diagnosed with gMG of MGFA class II, III, or IV * Is seropositive for AChR-Ab * Is treatment-naive for gMG or has been administered AChEI for the treatment of gMG * Had onset of generalized MG signs and/or symptoms within 12 months before screening; candidates who also had onset of ocular MG signs and/or symptoms within 24 months before screening may be enrolled in the study * Has an MG-ADL score ≥5 Exclusion Criteria: * gMG diagnosis of MGFA class I or V * Underwent a thymectomy prior to screening, except thymectomy for treatment of nonmalignant thymoma prior to the gMG diagnosis * Prior or current use of any of any systemic corticosteroid therapy or nonsteroidal immunosuppressive therapy for the treatment of gMG
Where it's running
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University of California, San Diego - Altman Clinical and Translational Research Institute (ACTRI)
La Jolla, California, United States Recruiting -
Samir Macwan, M.D., Inc. (S corporation)
Rancho Mirage, California, United States Recruiting -
EZR Research
Boca Raton, Florida, United States Recruiting -
University of Florida Jacksonville
Jacksonville, Florida, United States Recruiting -
Visionary Investigators Network
Miami, Florida, United States Recruiting -
University of California Irvine
Orange, Florida, United States Recruiting
Show 12 more locations
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Medsol Clinical Research Center Inc
Port Charlotte, Florida, United States Recruiting -
Baycare Medical Group
St. Petersburg, Florida, United States Recruiting -
Emory Brain Health Center
Atlanta, Georgia, United States Recruiting -
The Queen's Medical Center - West Oahu
Honolulu, Hawaii, United States Recruiting -
Hawaii Pacific Neuroscience
Honolulu, Hawaii, United States Recruiting -
HSHS Medical Group
O'Fallon, Illinois, United States Recruiting -
UMass Memorial Medical Center
Worcester, Massachusetts, United States Recruiting -
Henry Ford Health System
Detroit, Michigan, United States Recruiting -
Cleveland Clinic
Cleveland, Ohio, United States Recruiting -
Erlanger Neuroscience Institute
Chattanooga, Tennessee, United States Recruiting -
Central Texas Neurology Consultants - Elligo
Round Rock, Texas, United States Recruiting -
Center for Neurological Disorders - Greenfield
Greenfield, Wisconsin, United States Recruiting
Study contacts
- Study coordinator: Sabine Coppieters, MD
- Email: clinicaltrials@argenx.com
- Phone: 857-350-4834
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.