Evaluating CABA-201 for treating generalized myasthenia gravis

RESET-MG: A Phase 1/2, Open-Label Study to Evaluate the Safety and Efficacy of Autologous CD19-specific Chimeric Antigen Receptor T Cells (CABA-201) in Participants With Generalized Myasthenia Gravis

PHASE1; PHASE2 · Cabaletta Bio · NCT06359041

This study is testing a new cell therapy called CABA-201 to see if it can help adults with generalized myasthenia gravis feel stronger and improve their daily function.

Quick facts

PhasePHASE1; PHASE2
Study typeInterventional
Enrollment12 (estimated)
Ages18 Years to 70 Years
SexAll
SponsorCabaletta Bio (industry)
Drugs / interventionscyclophosphamide, fludarabine
Locations13 sites (Orange, California and 12 other locations)
Trial IDNCT06359041 on ClinicalTrials.gov

What this trial studies

This study aims to assess the safety and efficacy of CABA-201, an investigational cell therapy, in patients with generalized myasthenia gravis (gMG). Participants will receive a single dose of CABA-201 in combination with cyclophosphamide and fludarabine. The study will include adults aged 18 to 70 with a confirmed diagnosis of gMG, focusing on those with specific autoantibody profiles. The trial is designed to provide insights into the potential of this novel therapy to improve muscle strength and overall function in affected individuals.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18 to 70 diagnosed with generalized myasthenia gravis, either seropositive or seronegative.

Not a fit: Patients with contraindications to leukapheresis or severe uncontrolled medical conditions may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could offer a new therapeutic option for patients suffering from generalized myasthenia gravis.

How similar studies have performed: While there have been studies on CAR-T therapies for other conditions, this specific approach for generalized myasthenia gravis is novel and has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age ≥18 and ≤70 years of age
* Diagnosis of MG with generalized muscle weakness meeting criteria as defined by the MGFA class II, III , IVa, and IVb.
* Diagnosis of seropositive (autoantibodies AChR, MuSK and/or LRP4) or seronegative MG

Exclusion Criteria:

* Contraindication to leukapheresis
* History of anaphylactic or severe systemic reaction to fludarabine, cyclophosphamide or any of their metabolites
* Active infection requiring medical intervention at screening
* Current symptoms of severe, progressive, or uncontrolled renal, hepatic, hematological, gastrointestinal, pulmonary, psychiatric, cardiac, neurological, or cerebral disease, including severe and uncontrolled infections, such as sepsis and opportunistic infections.
* Concomitant medical conditions that, in the opinion of the investigator, might place the subject at unacceptable risk for participation in this study, interfere with the assessment of the effects or safety of the investigational product or with the study procedures
* Significant lung or cardiac impairment
* Prior solid organ (heart, liver, kidney, lung) transplant or hematopoietic cell transplant

Other protocol-defined inclusion/exclusion criteria may apply.

Where this trial is running

Orange, California and 12 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Generalized Myasthenia Gravis, CABA-201, autoimmune disease, anti-CD19 CAR-T therapy, cellular therapy, Myasthenia Gravis, Neuromuscular, Anti-AChR

Last reviewed 2026-05-15 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.