Recent Updates
Recently added Catalysts

Claseprubart

Phase 3

Chronic Inflammatory Demyelinating Polyneuropathy | Small molecule | Neurology |Dianthus Therapeutics, Inc.|Last Updated: Sep 2, 2026

Target and mechanism

Molecular targetC1s
ModalitySmall molecule

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment256

FDA Designations

ORPHAN_DRUG

Clinical trial landscape

Claseprubart · 4 trials · 3 indications

Phase 3 2Phase 2 2
NCT07647510A Phase 3 Study to Evaluate Claseprubart in Adults With Generalized Myasthenia Gravis (EMERGE)Myasthenia Gravis, Generalized
RECRUITING195 Analytics
NCT06858579A Study to Evaluate the Efficacy and Safety of DNTH103 in Adults With Chronic Inflammatory Demyelinating Polyneuropathy (CAPTIVATE)Chronic Inflammatory Demyelinating Polyneuropathy
RECRUITING256 Analytics
PHASE3RECRUITING
A Phase 3 Study to Evaluate Claseprubart in Adults With Generalized Myasthenia Gravis (EMERGE)
Myasthenia Gravis, GeneralizedUnlock trial analytics
PHASE3RECRUITING
A Study to Evaluate the Efficacy and Safety of DNTH103 in Adults With Chronic Inflammatory Demyelinating Polyneuropathy (CAPTIVATE)
Chronic Inflammatory Demyelinating PolyneuropathyUnlock trial analytics

Study Endpoints

Primary Endpoints

Change from Baseline to Week 17 in Myasthenia Gravis Activities of Daily Living (MG-ADL) Scale Score
Baseline (Day 1) to Week 17

The MG-ADL score is an 8-item patient reported outcome (PRO) instrument. The MG-ADL targets symptoms of disability across ocular, bulbar, respiratory, and axial symptoms. The item responses are scored from 0 to 3, and the total score of the MG-ADL is the sum of the 8 items and ranges from 0 to 24, with a higher score indicating more disability.

Part B: Time From First Dose to Relapse as Assessed by the Adjusted Inflammatory Neuropathy Cause and Treatment (INCAT)
Part B baseline to Part B end of treatment period (up to Week 52)

Adjusted INCAT scores range from 0-10 with a score of 10 indicating the greatest degree of disability. A relapse is defined as an increase of ≥1 point from baseline in adjusted INCAT score.

Incidence of Treatment-Emergent Adverse Events (TEAEs) and Treatment Emergent Serious Adverse Events (SAEs)
Baseline to Week 17

Incidence of treatment-emergent adverse events (TEAEs) and treatment emergent serious adverse events (SAEs)

Incidence of Treatment-Emergent Adverse Events (TEAEs) and Treatment-Emergent Serious Adverse Events (SAEs)
Baseline (Day 1) to Week 13

Number of participants with TEAEs and treatment-emergent SAEs will be reported.

Secondary Endpoints

Change from Baseline to Week 17 in Quantitative Myasthenia Gravis (QMG) Scale Score
Baseline (Day 1) to Week 17
Change from Baseline to Week 17 in Myasthenia Gravis Composite (MGC) Scale Score
Baseline (Day 1) to Week 17
Proportion of Participants with Greater Than or Equal to (≥) a 5-point Reduction in MG-ADL Scale Score at Week 17 Compared to Baseline
Baseline (Day 1) to Week 17
Unlock Study Endpoints

Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
PlaceboPLACEBO_COMPARATORIntravenous (IV) infusion of Placebo on Day 1 followed by subcutaneous (SC) injections of Placebo every 2 weeks (Q2W) starting at Week 1 (Day 8).
Claseprubart Q2WEXPERIMENTALIV loading dose of claseprubart on Day 1 followed by SC injections of claseprubart Q2W starting at Week 1 (Day 8).
Claseprubart Every 4 weeks (Q4W)EXPERIMENTALIV loading dose of claseprubart on Day 1 followed by SC injections of claseprubart or Placebo Q2W starting at Week 1 (Day 8), with doses alternating between claseprubart and placebo.
Claseprubart (Part A)EXPERIMENTALClaseprubart intravenous (IV) loading dose on Day 1. Claseprubart subcutaneous (SC) once every 2 weeks for up to 13 weeks.
Claseprubart (Part B)EXPERIMENTALClaseprubart SC once every 2 weeks for up to 52 weeks.
Placebo (Part B)PLACEBO_COMPARATORPlacebo SC once every 2 weeks for up to 52 weeks.
Claseprubart (Optional OLE)EXPERIMENTALClaseprubart SC once every 2 weeks for up to 104 weeks.
Claseprubart 300 mg Q2WEXPERIMENTAL -
Claseprubart 600 mg Q2WEXPERIMENTAL -

Interventions

NameTypeDescription
ClaseprubartDRUGIV loading dose on Day 1
PlaceboDRUGIV infusion on Day 1
Unlock Study Design Details

Eligibility Criteria

Age Range18 Years to 80 Years
SexALL
Healthy VolunteersNo
Study Sites3

Inclusion Criteria: 1. Must have given written informed consent before any study-related activities are carried out 2. Weight range between 40-130 kg at Screening 3. Diagnosis of gMG by the following tests: 1. Acetylcholine receptor antibody (AChR Ab) positive, and 2. One of the following: ...

Countries:United StatesArgentinaAustraliaBelgiumBrazilBulgariaChinaColombiaCroatiaDenmarkFranceGeorgiaGermanyIsraelItalyJapanLatviaMalaysiaNetherlandsNorth MacedoniaPhilippinesPolandRomaniaSerbiaSouth KoreaSpainThailandTurkey (Türkiye)United KingdomVietnamCanadaCzechiaNorwaySweden
Unlock Eligibility Criteria

Recent Changes (Last 90 Days)

LOWSep 2, 2026NCT06858579lastUpdatePostDate: changed
LOWSep 2, 2026NCT06858579lastUpdatePostDate: changed
LOWSep 2, 2026NCT06858579lastUpdatePostDate: changed
LOWSep 1, 2026NCT07647510lastUpdatePostDate: changed
LOWSep 1, 2026NCT07647510lastUpdatePostDate: changed
LOWAug 28, 2026NCT07647510lastUpdatePostDate: changed
LOWAug 28, 2026NCT07647510lastUpdatePostDate: changed
LOWAug 27, 2026NCT07647510startDate: changed
LOWAug 27, 2026NCT07647510startDate: changed
LOWAug 18, 2026NCT06858579lastUpdatePostDate: changed
LOWAug 18, 2026NCT06858579lastUpdatePostDate: changed
MEDIUMAug 11, 2026NCT06537999Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMAug 11, 2026NCT06537999Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMAug 11, 2026NCT06537999Status: RECRUITING → ACTIVE_NOT_RECRUITING
LOWJul 27, 2026NCT06282159lastUpdatePostDate: changed
LOWJul 27, 2026NCT06282159lastUpdatePostDate: changed
LOWJul 27, 2026NCT06282159lastUpdatePostDate: changed
LOWJul 13, 2026NCT06858579lastUpdatePostDate: changed
LOWJul 13, 2026NCT06858579lastUpdatePostDate: changed
LOWJul 8, 2026NCT07647510Status: NOT_YET_RECRUITING → RECRUITING

Frequently asked questions about Claseprubart

What is Claseprubart used for?

Claseprubart is an investigational small molecule being developed for chronic inflammatory demyelinating polyneuropathy, multifocal motor neuropathy, and generalized myasthenia gravis. It is currently in Phase 3 clinical trials for generalized myasthenia gravis and chronic inflammatory demyelinating polyneuropathy, and Phase 2 trials for multifocal motor neuropathy.

What does Claseprubart target?

Claseprubart targets C1s, a component of the complement system. By inhibiting C1s, it aims to modulate the complement pathway involved in the pathogenesis of autoimmune neurological conditions. This mechanism is being studied in conditions like generalized myasthenia gravis and chronic inflammatory demyelinating polyneuropathy.

Who is developing Claseprubart?

Claseprubart is being developed by Dianthus Therapeutics, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol DNTH. The company is conducting clinical trials for this investigational drug across multiple neurological indications.

What phase is Claseprubart in?

Claseprubart is in Phase 3 clinical development for generalized myasthenia gravis and chronic inflammatory demyelinating polyneuropathy. It is also being studied in Phase 2 trials for multifocal motor neuropathy and generalized myasthenia gravis. The drug is investigational and not yet approved by regulatory authorities.

What clinical trials is Claseprubart in?

Claseprubart is being evaluated in several trials. NCT07647510 is a Phase 3 study in generalized myasthenia gravis (EMERGE) with 195 participants. NCT06858579 is a Phase 3 study in chronic inflammatory demyelinating polyneuropathy (CAPTIVATE) with 256 participants. NCT06537999 is a Phase 2 study in multifocal motor neuropathy with 46 participants. NCT06282159 is a Phase 2 study in generalized myasthenia gravis (MAGIC) with 65 participants.

Is Claseprubart the same as DNTH103?

Yes, Claseprubart is also known as DNTH103. Clinical trial records for the drug use both names, with DNTH103 appearing in study titles for chronic inflammatory demyelinating polyneuropathy, multifocal motor neuropathy, and generalized myasthenia gravis trials.