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MuSK-CAART

Phase 1

MuSK Myasthenia Gravis | Monoclonal antibody | Neurology |Cabaletta Bio, Inc.|Last Updated: Nov 10, 2025

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment7

FDA Designations

ORPHAN_DRUGFAST_TRACK

Clinical trial landscape

MuSK-CAART · 1 trial · 1 indication

Phase 1 1
NCT05451212Open-label Study to Evaluate the Safety of Various Dosing Regimens of MuSK-CAART for MuSK Myasthenia GravisMuSK Myasthenia Gravis
COMPLETED7 Analytics
PHASE1COMPLETED
Open-label Study to Evaluate the Safety of Various Dosing Regimens of MuSK-CAART for MuSK Myasthenia Gravis
MuSK Myasthenia GravisUnlock trial analytics

Study Endpoints

Primary Endpoints

Adverse events
3 months

Incidence of adverse events (AEs), including dose-limiting toxicities (DLTs) and AEs that are related to MuSK-CAART.

Secondary Endpoints

Total MuSK-CAART positive cells
Baseline
Percent of CAAR-transduced cells
Baseline
Cellular kinetics profile of MuSK-CAART
Up to 36 months
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
MuSK-CAARTEXPERIMENTALCohort A: Infusion of MuSK-CAART at various dose levels with or without pre-treatment (6 groups planned). Cohort B: Infusion of MuSK-CAART at the dose regimen selected from Part A.

Interventions

NameTypeDescription
MuSK-CAARTBIOLOGICALIntravenous infusion of MuSK-CAART at different doses. Subjects may also receive MuSK-CAART following pre-treatment with CY, or CY plus FLU.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites5

Inclusion Criteria: * Confirmed diagnosis of MuSK-type MG with at least 1 prior positive anti-MuSK antibody test. * History of a negative anti-AChR (acetylcholine receptor) antibody test. * Positive anti-MuSK antibody test at screening * MG severity Class I to IVa on the MGFA (Myasthenia Gravis Fou...

Countries:United States
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Frequently asked questions about MuSK-CAART

What is MuSK-CAART used for?

MuSK-CAART is an investigational cell therapy being developed for the treatment of MuSK Myasthenia Gravis, a neurological autoimmune disorder. It is designed to target and eliminate the autoreactive B cells that produce antibodies against the MuSK protein, potentially offering a targeted approach to managing this condition.

Who makes MuSK-CAART?

MuSK-CAART is being developed by Cabaletta Bio, Inc., a biopharmaceutical company traded on the Nasdaq under the ticker symbol CABA. The company is focused on developing cellular immunotherapies for autoimmune diseases, with MuSK-CAART being one of its lead investigational candidates.

What phase is MuSK-CAART in?

MuSK-CAART is currently in Phase 1 clinical development. It has completed a Phase 1 open-label study evaluating the safety of various dosing regimens in patients with MuSK Myasthenia Gravis. The drug is investigational and has not yet been approved by regulatory authorities.

What clinical trials is MuSK-CAART in?

MuSK-CAART has been studied in one clinical trial, identified as NCT05451212. This was an open-label, uncontrolled Phase 1 study conducted in the United States, enrolling 7 adult patients with MuSK Myasthenia Gravis. The trial has been completed, and its primary focus was on evaluating the safety of different dosing regimens.

Has MuSK-CAART received any FDA designations?

Yes, MuSK-CAART has received both Orphan Drug and Fast Track designations from the U.S. Food and Drug Administration. These designations are intended to facilitate and expedite the development and review of drugs that treat serious conditions and fill an unmet medical need.