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Active, Not Recruiting

NCT Number: NCT06359041

RESET-MG: A Study to Evaluate the Safety and Efficacy of CABA-201 in Participants With Generalized Myasthenia Gravis

RESET-MG: A Phase 1/2 Open-Label Study to Evaluate the Safety and Efficacy of CABA-201 in Participants with Generalized Myasthenia Gravis

Active, Not Recruiting

This study is active but is not currently recruiting participants.

Key information

Conditions

Generalized Myasthenia Gravis (gMG) Autoimmune Diseases Autoimmune Diseases of the Nervous System Immune System Diseases Myasthenia Gravis Neoplasms Neoplasms by Site Nervous System Diseases Nervous System Neoplasms Neurodegenerative Diseases Neuromuscular Diseases Neuromuscular Junction Diseases Paraneoplastic Syndromes Paraneoplastic Syndromes, Nervous System

Age range

18 year–70 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 1 / Phase 2

Primary location

University of California Irvine, Orange, California, United States

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About this study

Myasthenia gravis (MG) is a rare autoimmune disorder characterized by autoantibody responses that cause defective transmission of signals at the neuromuscular junction, resulting in a distinctive pattern of weakness. Patients with generalized MG (gMG) typically experience symptoms associated with ocular disease in addition to weakness of many other voluntary muscle groups, including extremity, bulbar, and respiratory muscles. MG is considered a classic example of a B-cell mediated autoimmune disease. Currently, there are no curative treatments for MG. This study is being conducted to evaluate the safety and efficacy of an investigational cell therapy, CABA-201, that can be given to patients with gMG. A single dose of CABA-201 in combination with cyclophosphamide (CY) and fludarabine (FLU) will be evaluated.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

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.

Treatment and study plan

CABA-201

Biological

Single intravenous infusion of CABA-201 at a single dose level following preconditioning with fludarabine and cyclophosphamide

Primary outcomes

  1. To evaluate incidence and severity of adverse events (AEs)

    Time frame: Up to 28 days after CABA-201 infusion

    An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study treatment, whether or not considered related to the study treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal result of an investigation), symptom, or disease (new or exacerbated) temporally associated with the use of study treatment. The term AE is used to include both serious and non-serious AEs.

Secondary outcomes

  1. To evaluate the incidence and severity of adverse events (AEs)

    Time frame: Up to 156 weeks

    An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study treatment, whether or not considered related to the study treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal result of an investigation), symptom, or disease (new or exacerbated) temporally associated with the use of study treatment. The term AE is used to include both serious and non-serious AEs.

  2. To characterize the pharmacodynamics (PD)

    Time frame: Up to 156 weeks

    Levels of B cells in the blood

  3. To characterize the pharmacokinetics (PK)

    Time frame: Up to 156 weeks

    Levels of CABA-201-positive T cells in the blood

  4. To evaluate disease-related biomarkers

    Time frame: Up to 156 weeks

    Levels of MG-specific autoantibodies in the serum

  5. To evaluate efficacy by change in Myasthenia Gravis - Activities of Daily Living (MG-ADL) score over time.

    Time frame: Up to 156 weeks

    The MG-ADL scale is a validated instrument administered by a qualified assessor with 8 areas of activities of daily living as reported by patients: talking, chewing, swallowing, breathing, ability to brush teeth or comb hair, ability to rise from a chair, double vision, and eyelid droop. In each area, the score ranges from 0 (normal) to 3 (most severe). The total score is the sum of all subscores.

  6. To evaluate efficacy by change in Quantitative Myasthenia Gravis (QMG) score over time.

    Time frame: Up to 156 weeks

    The QMG score is a 13-item scale conducted by a qualified assessor to evaluate disease severity in patients with MG. The total score ranges from a minimum of 0 (no myasthenic findings) to 39 (maximum myasthenic deficits).

  7. To evaluate efficacy by change in Myasthenia Gravis Composite (MGC) score over time.

    Time frame: Up to 156 weeks

    The MGC scale is a physician-reported instrument for the assessment of MG patients' symptoms and impairments. It includes 10 domains, and the total score ranges from 0 (normal) to 50 (most severe).

Sponsors and collaborators

Lead sponsor

Cabaletta Bio

Industry

Registry information

Official study title

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

Important dates

Study start
2024
Primary completion
2029
Study completion
2029
First posted
Apr 11, 2024
Registry last updated
May 18, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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