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Atrasentan

Phase 3

IgA Nephropathy | Small molecule | Nephrology |Novartis AG|Last Updated: Jul 20, 2026

Target and mechanism

Molecular targetEDNRA
Target classAntagonist
ModalitySmall molecule

Also known as Drug: Atrasentan

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLEDDMC
Total Trials3
Total Enrollment561

FDA Designations

No designations recorded

Clinical trial landscape

Atrasentan · 3 trials · 6 indications

Phase 3 1Phase 2 2
NCT04573478Atrasentan in Patients With IgA NephropathyIgA Nephropathy
ACTIVE NOT_RECRUITING404 Analytics
PHASE3ACTIVE NOT_RECRUITING
Atrasentan in Patients With IgA Nephropathy
IgA NephropathyUnlock trial analytics

Study Endpoints

Primary Endpoints

Double-blind period: Change in proteinuria
Up to Week 36 or approximately 9 months

The change in urine protein:creatinine ratio (UPCR) from baseline to Week 36. (non-SGLT2i stratum)

Open-label period: Number of Subjects With Treatment-Emergent Adverse Events (TEAEs)
From open-label baseline up to end of treatment visit, up to 48 weeks

Type, incidence, severity, seriousness, and relatedness of TEAEs.

Open-label period: Number of Subjects With Adverse Events of Special Interest (AESI) Including Events of Fluid Overload
From open-label baseline up to end of treatment visit, up to 48 weeks

Incidence, severity, seriousness, and relatedness AESIs.

Substudy period: Number of subjects with TEAEs
From substudy baseline to end of treatment, up to 48 weeks

Type, incidence, severity, seriousness, and relatedness of TEAEs

Substudy period: Number of subjects with AESI
From substudy baseline to end of treatment, up to 48 weeks

Incidence, severity, seriousness, and relatedness AESIs.

Percentage Change in Proteinuria (UPCR From a 24-Hour Urine Collection) From Baseline to Week 12
From Baseline to Week 12

Change in proteinuria from Baseline to Week 12 across both periods between atrasentan versus placebo. Proteinuria was assessed using the urine protein to creatinine ratio (UPCR) measured from a 24-hour urine collection.

Change in proteinuria for IgAN, FSGS, and Alport syndrome patients receiving 0.75 mg atrasentan QD
Up to Week 12 or approximately 3 months

The change in urine protein:creatinine ratio (UPCR) from baseline to Week 12

Change in albuminuria for DKD patients
Up to Week 12 or approximately 3 months

The change in urine albumin:creatinine ratio (UACR) from baseline to Week 12

Change in proteinuria for FSGS patients at 1.5 mg dose
Up to Week 24 or approximately 6 months

The change in urine protein:creatinine ratio (UPCR) from baseline to Week 24

Secondary Endpoints

Double-blind period: Change in eGFR
Up to Week 136, 4 weeks post end of treatment
Double-blind period: Percent of subjects meeting the first composite endpoint
Up to approximately 2.6 years
Double-blind period: Percent of subjects meeting the second composite endpoint
Up to approximately 2.6 years
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
AtrasentanEXPERIMENTALDouble-blind Period: Once daily oral administration of 0.75 mg atrasentan for 132 weeks. Open-label Extension Period: Once daily oral administration of 0.75 mg atrasentan for 48 weeks after completion of 132 weeks on atrasentan or placebo. Substudy period: Once daily oral administration of 0.75 mg atrasentan + zigakibart for 48 weeks after completion of OL extension period
PlaceboPLACEBO_COMPARATORDouble-blind Period: Once daily oral administration of placebo for 132 weeks
Sequence Atrasentan/PlaceboEXPERIMENTALOnce daily oral administration of 0.75 mg atrasentan for 12 weeks (Period A) followed by once daily oral administration of placebo for 24 weeks (Period B)
Sequence Placebo/AtrasentanEXPERIMENTALOnce daily oral administration of placebo for 12 weeks (Period B) followed by once daily oral administration of 0.75 mg atrasentan for 24 weeks (Period A)
Atrasentan 0.75 mgEXPERIMENTALOnce daily oral administration of 0.75 mg atrasentan
Atrasentan 1.5 mgEXPERIMENTALOnce daily oral administration 1.5 mg atrasentan (FSGS cohorts only)

Interventions

NameTypeDescription
AtrasentanDRUGFilm-coated tablet
PlaceboDRUGFilm-coated tablet
ZigakibartDRUGpre-filled syringes with needle safety device
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites135

Inclusion Criteria: Double-Blind period: * Biopsy-proven IgA nephropathy. * Receiving a maximally tolerated dose of RAS inhibitor therapy (ACEi or ARB) that has been stable for at least 12 weeks. Exceptions from this requirement will be made for subjects who are unable to tolerate RAS inhibitor th...

Countries:United StatesArgentinaAustraliaBrazilCanadaChinaColombiaFranceGermanyHong KongIndiaItalyJapanNew ZealandPolandPortugalSouth KoreaSpainTaiwanUnited KingdomMalaysia
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Recent Changes (Last 90 Days)

MEDIUMAug 20, 2026NCT05834738TRIAL_REMOVED: changed
MEDIUMAug 20, 2026NCT05834738TRIAL_REMOVED: changed
MEDIUMAug 20, 2026NCT05834738TRIAL_REMOVED: changed
MEDIUMAug 20, 2026NCT05834738TRIAL_REMOVED: changed

Frequently asked questions about Atrasentan

What is Atrasentan used for in IgA Nephropathy?

Atrasentan is an investigational small molecule being developed for the treatment of IgA Nephropathy, a kidney disease. It is currently in Phase 3 clinical trials for this condition. The drug is being studied to assess its effects on patients with this disease, with trials conducted across multiple countries.

What does Atrasentan target?

Atrasentan is a small molecule that targets the endothelin A receptor. This receptor is involved in various physiological processes, and its blockade is being investigated as a potential therapeutic approach for IgA Nephropathy. The drug's mechanism of action is being evaluated in clinical trials to determine its efficacy and safety.

Who makes Atrasentan?

Atrasentan is being developed by Novartis AG, a multinational pharmaceutical company. Novartis is conducting clinical trials to evaluate the drug's safety and efficacy in patients with IgA Nephropathy. The company is listed on the stock exchange under the ticker symbol NVS.

What phase is Atrasentan in?

Atrasentan is currently in Phase 3 clinical development for IgA Nephropathy. This phase involves large-scale studies to confirm the drug's effectiveness, monitor side effects, and compare it with standard treatments. The drug is investigational and has not yet been approved by regulatory authorities.

What clinical trials is Atrasentan in?

Atrasentan is being studied in several clinical trials. The Phase 3 trial NCT04573478 is active but not recruiting, with 404 participants. A Phase 2 trial NCT04573920 is also active, enrolling 103 patients with proteinuric glomerular diseases. Additionally, a completed Phase 2 crossover study NCT05834738 involved 54 subjects with IgA Nephropathy.

Is Atrasentan the same as other names?

Atrasentan is also known simply as Atrasentan, with no alternative names provided. It is a small molecule drug being investigated for IgA Nephropathy. The drug is being developed by Novartis AG and is currently in Phase 3 clinical trials.