Comparative Efficacy of Nipocalimab and Efgartigimod in Participants With Generalized Myasthenia Gravis

Recruitment Status
RECRUITING
(See Contacts and Locations)Verified July 2026 by Janssen Research & Development, LLC
Sponsor
Janssen Research & Development, LLC
Information Provided by (Responsible Party)
Janssen Research & Development, LLC
Clinicaltrials.gov Identifier
NCT07217587
Other Study ID Numbers:
80202135MYG3002
First Submitted
October 14, 2025
First Posted
October 15, 2025
Last Update Posted
August 27, 2026
Last Verified
July 2026

ClinicalTrials.gov processed this data on August 2026. Link to the current ClinicalTrials.gov record .

History of Changes

Study Details

Study Description

Condition or DiseaseIntervention/Treatment
Myasthenia Gravis
Drug: NipocalimabDrug: EfgartigimodDrug: Nipocalimab

Study Design

Study TypeInterventional
Actual Enrollment115 participants
Design AllocationRandomized
Interventional ModelParallel Assignment
MaskingNone (Open Label)
Primary PurposeTreatment
Official TitleEfficacy and Safety of Nipocalimab vs Efgartigimod for Patients With Generalized Myasthenia Gravis in a Randomized, Open-label, Phase 3b, Interventional Trial Including Within Class Switching From Efgartigimod to Nipocalimab
Study Start DateJanuary 4, 2026
Actual Primary Completion Date1yr 2w from now
Actual Study Completion Date2yrs 4mos from now

Groups and Cohorts

Group/CohortIntervention/Treatment
Arm 1: Nipocalimab
Participants will receive nipocalimab intravenously (IV), at a loading dose on Day 1 followed by maintenance dosing once every 2 weeks (q2w) until Week 12.
Drug: Nipocalimab
Nipocalimab will be administered intravenously.
Arm 2: Efgartigimod
Participants will receive efgartigimod IV, once a week for 4 weeks starting from Day 1. Eligible participants will be given the option to switch to Arm 3 between Week 4 and Week 12.
Drug: Efgartigimod
Efgartigimod will be administered intravenously.
Arm 3: Treatment Switch (Nipocalimab)
Participants previously treated with efgartigimod, who are directly enrolled in this arm, and eligible participants switching from Arm 2 will receive nipocalimab IV at a loading dose on Switch Day 1 followed by maintenance dosing q2w until Switch Week 12.
Drug: Nipocalimab
Nipocalimab will be administered intravenously.

Outcome Measures

Primary Outcome Measures
  1. Arms 1 and 2: Averaged Mean Percent Change from Baseline in Total Immunoglobulin G (IgG) Levels Over Weeks 8, 10 and 12
    Average mean percent change from baseline in total IgG levels over Weeks 8 , 10 and 12 will be reported.
Secondary Outcome Measures
  1. Arms 1 and 2: Averaged Mean Change from Baseline in Myasthenia Gravis-Activities of Daily Living (MG-ADL) Total Score Over Weeks 8, 10 and 12
    Average mean change from baseline in MG-ADL total score over Weeks 8, 10 and 12 will be reported. The MG-ADL provides a rapid assessment of the participant's MG symptom severity. Eight functions (talking, chewing, swallowing, breathing, impairment of ability to brush teeth or comb hair, impairment of ability to arise from a chair, double vision, eyelid droop) are rated on a 4-point scale: 0 (no impairment) to 3 (severe impairment). The total score will be sum of eight function scores and can range from 0 to 24. A higher score indicates greater symptom severity.
  2. Arms 1 and 2: Mean Percent Change from Baseline in Total IgG Between Arm 1 at EoT and Arm 2 at EoC Based on Clinical Evaluation
    Mean percent change from baseline in total IgG between Arm 1 at end of treatment (EoT) and Arm 2 at end of cycle (EoC) based on clinical evaluation will be reported. EoC based on clinical evaluation is defined as the timepoint at which after completion of one cycle of efgartigimod, based on MG-ADL score clinical criteria, the treatment decision would be made to start a second cycle of efgartigimod, an MG rescue medication, or Week 12/EoT, whichever occurs first.
  3. Arms 1 and 2: Mean Percent Change from Baseline in MG-ADL Total Score Between Arm 1 at EoT and Arm 2 at EoC Based on Clinical Evaluation
    Mean change from baseline in MG-ADL total score between Arm 1 at EoT and Arm 2 at EoC based on clinical evaluation will be reported. MG-ADL provides a rapid assessment of the participant's MG symptom severity. The total score can range from 0 to 24. A higher score indicates greater symptom severity.
  4. Arms 1 and 2: Mean Percent Change from Baseline in Total IgG Levels at Week 8
    Mean percent change from baseline in total IgG levels at Week 8 will be reported.
  5. Arms 1 and 2: Mean Change from Baseline in MG-ADL Total Score at Week 8
    Mean change from baseline in MG-ADL total score at Week 8 will be reported. MG-ADL provides a rapid assessment of the participant's MG symptom severity. The total score can range from 0 to 24. A higher score indicates greater symptom severity.
  6. Arms 1 and 2: Averaged Mean Change from Baseline in Quantitative Myasthenia Gravis (QMG) Total Score Over Weeks 8 and 12
    Average mean change from baseline in QMG total score over Weeks 8 and 12 will be reported. The QMG test is a standardized quantitative strength assessment comprising 13 components. The quantitative results of each strength component are mapped to the following 4-point scale: 0 = None, 1 = Mild, 2 = Moderate and 3 = Severe. The total score can range from 0 to 39. A higher score indicates greater weakness.
  7. Arms 1 and 2: Mean Percent Change from Baseline in QMG Total Score Between Arm 1 at EoT and Arm 2 at EoC Based on Clinical Evaluation
    Mean change from baseline in QMG total score between Arm 1 at EoT and Arm 2 at EoC based on clinical evaluation will be reported. The QMG test is a standardized quantitative strength assessment comprising 13 components. The quantitative results of each strength component are mapped to the following 4-point scale: 0 = None, 1 = Mild, 2 = Moderate and 3 = Severe. The total score can range from 0 to 39. A higher score indicates greater weakness.
  8. Arms 1 and 2: Mean Change from Baseline in QMG Total Score at Week 8
    Mean change from baseline in QMG total score at Week 8 will be reported.
  9. Arms 1 and 2: Percentage of Participants Maintaining >= 2-Point Improvement in MG-ADL Total Score for At Least 6 Weeks During Randomized Treatment Phase
    Percentage of participants maintaining \>= 2-point improvement in MG-ADL total score for at least 6 weeks during the 12 week randomized treatment phase between Arms 1 and 2 will be reported. MG-ADL provides a rapid assessment of the participant's MG symptom severity. The total score can range from 0 to 24. A higher score indicates greater symptom severity.
  10. Arms 1 and 2: Percentage of Participants Maintaining >= 2-Point Improvement in MG-ADL Total Score for At Least 8 Weeks During Randomized Treatment Phase
    Percentage of participants maintaining \>= 2-point improvement in MG-ADL total score for at least 8 weeks during the 12 week randomized treatment phase between Arms 1 and 2 will be reported. MG-ADL provides a rapid assessment of the participant's MG symptom severity. The total score can range from 0 to 24. A higher score indicates greater symptom severity.
  11. Arms 1 and 2: Percentage of Participants Maintaining >= 2-Point Improvement in MG-ADL Total Score for 50% of Postbaseline Observations
    Percentage of participants maintaining \>= 2-point improvement in MG-ADL total score for at least 50% of study duration between Arms 1 and 2 will be reported. MG-ADL provides a rapid assessment of the participant's MG symptom severity. The total score can range from 0 to 24. A higher score indicates greater symptom severity.
  12. Arms 1 and 2: Percentage of Participants Maintaining >= 2-Point Improvement in MG-ADL Total Score for 75% of Postbaseline Observations
    Percentage of participants maintaining \>= 2-point improvement in MG-ADL for at least 75% of study duration between Arms 1 and 2 will be reported.
  13. Arms 1 and 2: Percentage of Participants with MG-ADL Total Score of 0 or 1 at Week 12
    Percentage of participants with MG-ADL total score of 0 or 1 at end of study treatment between Arms 1 and 2 will be reported. MG-ADL provides a rapid assessment of the participant's MG symptom severity. The total score can range from 0 to 24. A higher score indicates greater symptom severity.
  14. Arm 3: Mean Percent Change in Total IgG from Switch Day 1 to Switch Week 12
    Mean percent change in total IgG from pre-nipocalimab exposure to end of nipocalimab study treatment in Arm 3 will be reported.
  15. Arm 3: Mean Change in MG-ADL Total Score from Switch Day 1 to Switch Week 12
    Mean change in MG-ADL total score from pre-nipocalimab exposure to end of nipocalimab study treatment in Arm 3 will be reported. MG-ADL provides a rapid assessment of the participant's MG symptom severity. The total score can range from 0 to 24. A higher score indicates greater symptom severity.
  16. Arm 3: Percentage of Participants with >= 2-Point Improvement in MG-ADL Total Score at Switch Week 12
    Percentage of participants with \>= 2-point improvement in MG-ADL total score at switch week 12 in Arm 3 will be reported.
  17. Arm 3: Percentage of Participants Maintaining >= 2-Point Improvement in MG-ADL Total Score for At Least 6 Weeks During Treatment Phase
    Percentage of participants maintaining \>= 2-point improvement in MG-ADL total score while on nipocalimab for at least 6 weeks during treatment phase in Arm 3 will be reported. MG-ADL provides a rapid assessment of the participant's MG symptom severity. The total score can range from 0 to 24. A higher score indicates greater symptom severity.
  18. Arm 3: Percentage of Participants with MG-ADL Total Score of 0 or 1 at Switch Week 12
    Percentage of participants with MG-ADL total score of 0 or 1 at switch week 12 in Arm 3 will be reported. MG-ADL provides a rapid assessment of the participant's MG symptom severity. The total score can range from 0 to 24. A higher score indicates greater symptom severity.
  19. Arms 1 and 2: Number of Participants with Adverse Events (AEs), Serious Adverse Events (SAEs) and Adverse Events of Special Interest (AESIs)
    An AE is any untoward medical occurrence in a clinical study participant administered with a pharmaceutical (investigational or non investigational) product. An AE does not necessarily have a causal relationship with the intervention. An SAE is any untoward medical occurrence that at any dose results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, is a suspected transmission of any infectious agent via a medicinal product and is medically important. Treatment-emergent AEs associated with a. infections that are severe or require IV anti-infective or operative/invasive intervention, b. events of hypoalbuminemia \<20 g/L and c. serious and non-serious venous thromboembolism (VTE; deep vein thrombosis \[DVT\] and/or pulmonary embolism \[PE\]) will be considered AESIs.
  20. Arm 3: Number of Participants with AEs, SAEs and AESIs
    An AE is any untoward medical occurrence in a clinical study participant administered with a pharmaceutical (investigational or non investigational) product. An AE does not necessarily have a causal relationship with the intervention. An SAE is any untoward medical occurrence that at any dose results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, is a suspected transmission of any infectious agent via a medicinal product and is medically important. Treatment-emergent AEs associated with a. infections that are severe or require IV anti-infective or operative/invasive intervention, b. events of hypoalbuminemia \<20 g/L and c. serious and non-serious venous thromboembolism (VTE; DVT and/or PE) will be considered AESIs.

Eligibility Criteria

Ages Eligible for Study(Adult, Older Adult)
Sexes Eligible for StudyAll
Accepts Healthy VolunteersNo
Inclusion Criteria
Inclusion criteria: For all arms:
Medically stable on the basis of physical examination, medical history, vital signs, clinical laboratory tests, and 12-lead electrocardiogram (ECG) performed at screening
Diagnosis of myasthenia gravis (MG) with generalized muscle weakness meeting the clinical criteria for generalized MG (gMG) as defined by the Myasthenia gravis foundation of America (MGFA) clinical classification class II a/b, III a/b, or IV a/b at screening and positive for acetylcholine receptor (AChR) antibodies
Myasthenia Gravis-Activities of Daily Living (MG-ADL) score of greater than or equal to (\>=) 5 with less than (\<) 50% of symptoms coming from ocular MG-ADL sub-scores at study screening and baseline (Day 1) visits Criteria specific to Arms 1 and 2 only: \- Has suboptimal response to current stable therapy for gMG according to the investigator or has discontinued corticosteroids and/or immunosuppressants/immunomodulators including eculizumab or other novel approved immune agents at least 4 weeks prior to baseline due to intolerance or lack of efficacy Criteria specific to Arm 3: \- Treatment with efgartigimod IV or subcutaneous (SC) for \>=1 cycle, and the final cycle is consistent with product information
Exclusion Criteria
Inclusion criteria: For all arms:
Medically stable on the basis of physical examination, medical history, vital signs, clinical laboratory tests, and 12-lead electrocardiogram (ECG) performed at screening
Diagnosis of myasthenia gravis (MG) with generalized muscle weakness meeting the clinical criteria for generalized MG (gMG) as defined by the Myasthenia gravis foundation of America (MGFA) clinical classification class II a/b, III a/b, or IV a/b at screening and positive for acetylcholine receptor (AChR) antibodies
Myasthenia Gravis-Activities of Daily Living (MG-ADL) score of greater than or equal to (\>=) 5 with less than (\<) 50% of symptoms coming from ocular MG-ADL sub-scores at study screening and baseline (Day 1) visits Criteria specific to Arms 1 and 2 only: \- Has suboptimal response to current stable therapy for gMG according to the investigator or has discontinued corticosteroids and/or immunosuppressants/immunomodulators including eculizumab or other novel approved immune agents at least 4 weeks prior to baseline due to intolerance or lack of efficacy Criteria specific to Arm 3: \- Treatment with efgartigimod IV or subcutaneous (SC) for \>=1 cycle, and the final cycle is consistent with product information Exclusion criteria:
Any confirmed or suspected clinical immunodeficiency syndrome not related to treatment of his/her gMG, or has a family history of congenital or hereditary immunodeficiency unless confirmed absent in the participant
Had a thymectomy within 1 year prior to baseline, or thymectomy is planned during the study
Currently has a malignancy or has a history of malignancy within 3 years before baseline Criteria specific to Arms 1 and 2 only: \- Has received treatment for MG with an FcRn-targeting therapy Criteria specific to Arm 3 only: \- Is currently taking IgG monoclonal antibody therapeutics, or Fc-conjugated therapeutic agents, including factor or enzyme replacement, with the exception of efgartigimod

Contacts and Locations

Sponsors and CollaboratorsJanssen Research & Development, LLC
Locations
Neurology Center of North Orange County | Fullerton California, United States, 92835The Neurology Group | Pomona California, United States, 91767Advanced Neurology of Colorado | Fort Collins Colorado, United States, 80528University of Connecticut | Farmington Connecticut, United States, 06030SFM Clinical Research LLC | Boca Raton Florida, United States, 33487HSHS St. Elizabeth's Hospital | O'Fallon Illinois, United States, 62269Josephson Wallack Munshower Neurology, PC | Indianapolis Indiana, United States, 46256Tulane Center for Clinical Research | New Orleans Louisiana, United States, 70112Henry Ford Hospital | Detroit Michigan, United States, 48202Equity Medical | New York New York, United States, 10023Velocity Clinical Research, Inc. | Raleigh North Carolina, United States, 27607 6010Atrium Health Wake Forest Baptist | Winston-Salem North Carolina, United States, 27157Neurology Clinic, PC | Cordova Tennessee, United States, 38018Texas Neurology | Dallas Texas, United States, 75206Rambam Medical Center | Haifa , Israel, 3109601Sourasky Medical Center | Tel Aviv , Israel, 6423906HOCH Health Ostschweiz Kantonsspital St.Gallen | Sankt Gallen , Switzerland, 9007
Investigators
Study Director: Janssen Research & Development, LLC Clinical Trial, Janssen Research & Development, LLC