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CABA-201

Phase 2

Idiopathic Inflammatory Myopathy | Monoclonal antibody | Rare Disease |Cabaletta Bio, Inc.|Trials Updated: Oct 19, 2026

CABA-201 development status

Highest phase Phase 2
Registered trials 5 across 1 sponsor since Jun 2020

CABA-201 target and mechanism

Molecular targetCD19
Target classProtein
ModalityMonoclonal antibody

Also known as Rese-cel, Resecabtagene autoleucel

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials4
Total Enrollment163

FDA Designations

ORPHAN_DRUG

CABA-201 clinical trials

CABA-201 · 4 trials · 14 indications

Phase 2 2Phase 1 2
NCT06328777RESET-SSc: An Open-Label Study to Evaluate the Safety and Efficacy of CABA-201, a CD19-CAR T Cell Therapy, in Subjects With Systemic SclerosisSystemic Sclerosis
RECRUITING37 Analytics
NCT06154252RESET-Myositis: An Open-Label Study to Evaluate the Safety and Efficacy of CABA-201 in Subjects With Active Idiopathic Inflammatory Myopathy or Juvenile Idiopathic Inflammatory MyopathyIdiopathic Inflammatory Myopathy
RECRUITING74 Analytics
PHASE2RECRUITING
RESET-SSc: An Open-Label Study to Evaluate the Safety and Efficacy of CABA-201, a CD19-CAR T Cell Therapy, in Subjects With Systemic Sclerosis
Systemic SclerosisUnlock trial analytics
PHASE2RECRUITING
RESET-Myositis: An Open-Label Study to Evaluate the Safety and Efficacy of CABA-201 in Subjects With Active Idiopathic Inflammatory Myopathy or Juvenile Idiopathic Inflammatory Myopathy
Idiopathic Inflammatory MyopathyUnlock trial analytics

Study Endpoints

Primary Endpoints

Phase 1/2: To evaluate incidence of adverse events
Up to 28 days after CABA-201 infusion

Incidence and severity of AEs

Phase 2b Sub-study: To evaluate the efficacy of CABA-201 on % predicted forced vital capacity (FVC) in SSc-ILD subjects
Week 52

Mean change from baseline in % predicted FVC without any immunomodulatory or anti-fibrotic medications and on no or low dose of steroids

Phase 1/2: Incidence and severity of adverse events (AEs)
Up to 28 days after CABA-201 infusion

Incidence and severity of AEs

Phase 2b Sub-study 1: Proportion of DM & ASyS subjects achieving at least a moderate Total Improvement Score (TIS) without any immunomodulatory medications and no or low dose of steroids
Within 16 weeks

≥40 on the TIS, a composite measure ranging from 0 to 100, derived from six Core Set Measures, with higher scores indicating greater clinical improvement

Phase 2b Sub-study 2: Proportion of subjects with IMNM achieving at least a minimal TIS without any immunomodulatory medications and no or low dose of steroids
Within 24 weeks

≥20 on the TIS, a composite measure ranging from 0 to 100, derived from six Core Set Measures, with higher scores indicating greater clinical improvement

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

To evaluate incidence of adverse events
Up to 28 days after CABA-201 infusion

Secondary Endpoints

To evaluate adverse events and laboratory abnormalities
Up to 156 weeks (Phase 1/2) and through 104 weeks (Sub-study)
To characterize the pharmacodynamics (PD)
Up to 156 weeks (Phase 1/2) and through 104 weeks (Sub-study)
To characterize the pharmacokinetics (PK)
Up to 156 weeks (Phase 1/2) and through 104 weeks (Sub-study)
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
CABA-201 Phase 1/2EXPERIMENTALSevere Skin Cohort: Infusion of CABA-201 with preconditioning in subjects with SSc with severe skin involvement Organ Cohort: Infusion of CABA-201 with preconditioning in subjects with SSc with organ involvement
CABA-201 Phase 2b - Sub-studyEXPERIMENTALInfusion of CABA-201 with preconditioning in subjects with SSc
CABA-201 Phase 2b - Sub-study 1EXPERIMENTALInfusion of CABA-201 following preconditioning with fludarabine and cyclophosphamide in subjects with DM and ASyS.
CABA-201 Phase 2b - Sub-study 2EXPERIMENTALInfusion of CABA-201 following preconditioning with fludarabine and cyclophosphamide in subjects with IMNM.
CABA-201EXPERIMENTALAChR Antibody-Positive Cohort or AChR Antibody-Negative Cohort
CABA-201, No PreconditioningEXPERIMENTALInfusion of CABA-201 with no preconditioning in subjects with gMG
CABA-201 with FLU/CY PreconditioningEXPERIMENTALLN Cohort: Infusion of CABA-201 with preconditioning in subjects with LN Non-renal SLE Cohort: Infusion of CABA-201 with preconditioning in subjects with non-renal SLE who do not meet criteria for inclusion in the LN cohort Expansion Cohort: Infusion of CABA-201 with preconditioning in subjects with LN and SLE

Interventions

NameTypeDescription
CABA-201BIOLOGICALSingle intravenous infusion of CABA-201 at a single dose level following preconditioning with fludarabine and cyclophosphamide
CABA-201 following preconditioning with fludarabine and cyclophosphamideBIOLOGICALSingle intravenous infusion of CABA-201 at a single dose level following preconditioning with fludarabine and cyclophosphamide
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites10

Inclusion Criteria: * Age ≥18 and ≤75 * A clinical diagnosis of SSc, based on the 2013 American College of Rheumatology and European League Against Rheumatism classification criteria. * Early active disease * Evidence of significant skin, pulmonary, or cardiac involvement Exclusion Criteria: * Co...

Countries:United StatesGermanyItalyUnited KingdomCanadaSpain
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Recent Changes (Last 90 Days)

LOWOct 19, 2026NCT06359041lastUpdatePostDate: changed
LOWOct 19, 2026NCT06359041lastUpdatePostDate: changed
LOWOct 19, 2026NCT06359041lastUpdatePostDate: changed
LOWOct 16, 2026NCT06328777lastUpdatePostDate: changed
LOWOct 16, 2026NCT06328777lastUpdatePostDate: changed
LOWOct 15, 2026NCT06154252lastUpdatePostDate: changed
LOWOct 15, 2026NCT06154252lastUpdatePostDate: changed
LOWOct 9, 2026NCT06359041lastUpdatePostDate: changed
LOWOct 9, 2026NCT06359041lastUpdatePostDate: changed
LOWOct 6, 2026NCT06121297lastUpdatePostDate: changed
LOWOct 6, 2026NCT06121297lastUpdatePostDate: changed
LOWSep 17, 2026NCT06154252lastUpdatePostDate: changed
LOWSep 17, 2026NCT06154252lastUpdatePostDate: changed
LOWSep 2, 2026NCT06154252lastUpdatePostDate: changed
LOWSep 2, 2026NCT06154252lastUpdatePostDate: changed
LOWSep 2, 2026NCT06154252lastUpdatePostDate: changed
LOWAug 26, 2026NCT06121297lastUpdatePostDate: changed
LOWAug 26, 2026NCT06121297lastUpdatePostDate: changed
LOWAug 21, 2026NCT06154252lastUpdatePostDate: changed
LOWAug 21, 2026NCT06154252lastUpdatePostDate: changed

Frequently asked questions about CABA-201

What is CABA-201?

CABA-201 is an investigational CD19-targeted CAR T cell therapy being developed by Cabaletta Bio, Inc. for autoimmune diseases. It is designed to be given after preconditioning with fludarabine and cyclophosphamide. It is in clinical development and has not been approved by the FDA.

What is CABA-201 used for?

CABA-201 is being studied for generalized myasthenia gravis, idiopathic inflammatory myopathy, systemic lupus erythematosus, and systemic sclerosis. These are autoimmune conditions in which the immune system attacks the body's own tissues. All of these uses are investigational and are being evaluated in clinical trials.

What does CABA-201 target?

CABA-201 targets CD19, a protein found on the surface of B cells. By targeting CD19, the therapy is designed to deplete B cells. CD19 is a protein target, and the drug is a monoclonal antibody-based CAR T cell therapy.

Who makes CABA-201?

CABA-201 is developed by Cabaletta Bio, Inc., which trades under the ticker CABA. The company is the sponsor of the clinical trials evaluating the therapy in autoimmune indications.

What phase is CABA-201 in?

CABA-201 is in Phase 1 and Phase 2 clinical development. It is investigational and has not been approved by the FDA. The trials are currently recruiting participants.

What clinical trials is CABA-201 in?

CABA-201 is being evaluated in several recruiting trials: RESET-MG (NCT06359041) in generalized myasthenia gravis, RESET-SSc (NCT06328777) in systemic sclerosis, RESET-Myositis (NCT06154252) in idiopathic inflammatory myopathy, and RESET-SLE (NCT06121297) in systemic lupus erythematosus.