Clinical trial Recruiting at 15 sites Phase2; Phase3 Interventional Ages 2 to 17

Nipocalimab treatment for children with generalized myasthenia gravis

Official title: An Open-Label Uncontrolled Multicenter Study to Evaluate the Pharmacokinetics, Pharmacodynamics, Safety and Activity of Nipocalimab in Children Aged 2 to Less Than 18 Years With Generalized Myasthenia Gravis

Run by Janssen Research & Development, LLC · NCT05265273 · Data updated 2026-11-12

This study is testing a new treatment called nipocalimab to see if it can help children with generalized myasthenia gravis who haven't responded well to other therapies.

More Myasthenia Gravis trials

Quick facts

PhasePhase2; Phase3
Study typeInterventional
Ages2 Years to 17 Years
SexAll
Enrollment12 (estimated)
SponsorJanssen Research & Development, LLC
Industry-sponsored
Drugs / interventionsnipocalimab
Locations19 sites (Phoenix, Arizona and 18 other locations)
StatusRecruiting
StartedJuly 20, 2022
Main results expectedJune 30, 2027
Study endsJuly 2, 2029
Registry record updatedNovember 4, 2026
Trial IDNCT05265273 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are children aged 2 to less than 18 years diagnosed with generalized myasthenia gravis and showing insufficient response to current therapies.

Probably not a fit

Patients who do not have a confirmed diagnosis of generalized myasthenia gravis or those who are not within the specified age range may 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 evaluates the effects of nipocalimab on serum immunoglobulin G levels in pediatric patients aged 2 to less than 18 years with generalized myasthenia gravis. It aims to assess the safety, tolerability, and pharmacokinetics of nipocalimab in children who have not responded adequately to standard treatments. The study will involve participants from various locations globally, with specific age criteria for U.S. sites. Participants will receive the treatment through infusion while undergoing regular monitoring.

Why it matters

Potential benefit: If successful, this treatment could significantly improve the management of generalized myasthenia gravis in children, enhancing their quality of life.

How similar studies have gone: Other studies have shown promise in treating myasthenia gravis with similar approaches, indicating potential for success in this trial.

Who can join: the full rules

Show full inclusion / exclusion criteria
Key Inclusion Criteria:

* Age: For US sites only: 8 to \< 18 years
* Diagnosis of myasthenia gravis (MG) with generalized muscle weakness meeting the clinical criteria for generalized myasthenia gravis (gMG) as defined by the Myasthenia Gravis Foundation of America (MGFA) Clinical Classification Class IIa/b, IIIa/b, or IVa/b at screening
* Has a positive serologic test for acetylcholine receptor (anti-AChR) antibodies or muscle-specific tyrosine kinase (anti-MuSK) antibodies at screening
* A participant using herbal, naturopathic, traditional Chinese remedies, ayurvedic or nutritional supplements, or medical marijuana (with a doctor's prescription) is eligible if the use of these medications is acceptable to the Investigator. These remedies must remain at a stable dose and regimen throughout the study
* Has sufficient venous access to allow drug administration by infusion and blood sampling as per the protocol
* Participants should have a body weight and body mass index between 5th and 95th percentile for age and sex. Obese participants greater than 95th percentile and underweight participants below 5th percentile may participate following medical clearance
* A female of childbearing potential must have a negative highly sensitive serum (beta-human chorionic gonadotropin \[beta-hCG\]) at Screening and a negative urine pregnancy test at Day 1 prior to administration of study intervention

Key Exclusion Criteria:

* Has a history of severe and/or uncontrolled hepatic (example, viral/alcoholic/ autoimmune hepatitis/ cirrhosis/ and/or metabolic liver disease), gastrointestinal, renal, pulmonary, cardiovascular (including congenital heart diseases), psychiatric, neurological musculoskeletal disorder, any other medical disorder(s) (example, diabetes mellitus), risk factors for thrombosis events (example, a history of venous thromboembolism \[VTE\] or antiphospholipid syndrome, or a personal or family history of heritable coagulation disorder such as factor V leiden, protein S or protein C deficiency, atrial fibrillation/flutter, major orthopedic surgery or significant trauma that may increase the risk of VTE, is expected to be immobilized for prolonged periods of time), or has clinically significant abnormalities in screening laboratory, that might interfere with participant's full participation in the study, and/ or might jeopardize the safety of the participant or the validity of the study results
* Has any confirmed or suspected clinical immunodeficiency syndrome not related to treatment of his/her generalized myasthenia gravis (gMG), or has a family history of congenital or hereditary immunodeficiency unless confirmed absent in the participant
* Has had a thymectomy within 12 months prior to screening, or thymectomy is planned during the Active treatment Phase of the study
* Has shown a previous severe immediate hypersensitivity reaction, such as anaphylaxis to therapeutic proteins (example, monoclonal antibodies)
* Has experienced myocardial infarction, unstable ischemic heart disease, or stroke within 12 weeks of screening

Where it's running

  • Phoenix Children's Hospital
    Phoenix, Arizona, United States
    Recruiting
  • Lucile Packard Children's Hospital Stanford
    Palo Alto, California, United States
    Recruiting
  • UCSF Benioff Children's Hospital
    San Francisco, California, United States
    Recruiting
  • Children's Hospital Colorado
    Aurora, Colorado, United States
    Recruiting
  • University of South Florida Morsani Center for Advanced Healthcare
    Tampa, Florida, United States
    Recruiting
  • C.S. Mott Children's Hospital
    Ann Arbor, Michigan, United States
    Recruiting
Show 13 more locations
  • Penn State Milton S Hershey Medical Ctr
    Hershey, Pennsylvania, United States
    Recruiting
  • Childrens Hospital Of Philadelphia
    Philadelphia, Pennsylvania, United States
    Recruiting
  • Nagano Children's Hospital
    Azumino-shi, Japan
    Recruiting
  • University of Miyazaki Hospital
    Miyazaki, Japan
    Recruiting
  • Hyogo College of Medicine Hospital
    Nishinomiya-Shi, Japan
    Recruiting
  • Saitama Prefecture Children's Medical Center
    Saitama Shi, Japan
    Recruiting
  • Tokyo Women's Medical University Hospital
    Shinjuku-ku, Japan
    Recruiting
  • Leiden University Medical Center
    Leiden, Netherlands
    Recruiting
  • Uniwersyteckie Centrum Kliniczne
    Gdansk, Poland
    Recruiting
  • Childrens Hospital Los Angeles
    Los Angeles, California, United States
    Completed
  • University of Kansas Medical Center
    Lawrence, Kansas, United States
    Completed
  • University of Pittsburgh Medical Center
    Pittsburgh, Pennsylvania, United States
    Terminated
  • Chiba University Hospital
    Chiba, Japan
    Completed

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.