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Atacicept

Phase 3

IgA Nephropathy | Monoclonal antibody | Nephrology |Vera Therapeutics, Inc.|Last Updated: Jun 26, 2026

Target and mechanism

Molecular targetTNFSF13B, TNFSF13
Target classInhibitor
ModalityMonoclonal antibody

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment376

FDA Designations

BREAKTHROUGH_THERAPYACCELERATED_APPROVALPRIORITY_REVIEW

Clinical trial landscape

Atacicept · 4 trials · 9 indications

Phase 3 1Phase 2 3
NCT04716231Atacicept in Subjects With IgA NephropathyIgA Nephropathy
ACTIVE NOT_RECRUITING376 Analytics
PHASE3ACTIVE NOT_RECRUITING
Atacicept in Subjects With IgA Nephropathy
IgA NephropathyUnlock trial analytics

Study Endpoints

Primary Endpoints

Change from baseline in urine protein to creatinine ratio (UPCR)
36 Weeks

UPCR based on 24 hour urine collection

AE profile and results of routine clinical and laboratory tests
Baseline until end of study: 52 + 26 Weeks

Incidence of treatment-emergent adverse events (TEAEs), serious adverse events (SAEs), adverse events of special interest (AESIs), study drug discontinuation due to TEAEs

Percent reduction in urine protein to creatinine ratio (UPCR)
Baseline, Week 36

Changes in proteinuria based on UPCR from 24 hour urine samples at baseline versus week 36

Evaluate the effect of atacicept on Gd-IgA1 in patients with IgAN
Up to 24 weeks

Gd-IgA1 levels through Week 24

Incidence of adverse events observed during the dosing period
Baseline until end of study up to week156

Patient incidence of reported Adverse Events (AEs)

Secondary Endpoints

Annualized rate of change in estimated glomerular filtration rate (eGFR)
52 and 104 Weeks
Changes from baseline estimated glomerular filtration rate (eGFR).
Baseline, Week 36, Week 52
Change in disease-specific antibodies
Baseline through 52 Weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Atacicept Dose 150mgEXPERIMENTALAtacicept 150mg once weekly subcutaneous (SC) injections
Placebo to match Atacicept (Part C/D)PLACEBO_COMPARATORPlacebo to match Atacicept once weekly subcutaneous (SC) injection
IgAN or IgAVNEXPERIMENTALAdult and pediatric patients with biopsy proven IgAN or IgAVN with varied severity of proteinuria and kidney function beyond what is currently included in most clinical trials. Adults with post-transplant IgAN recurrence are also included.
pMNEXPERIMENTALAdults with biopsy-proven pMN associated with anti-PLA2R antibodies at low risk of spontaneous remission, or experiencing recurrent or resistant disease.
Primary Nephrotic Syndrome (MCD/FSGS)EXPERIMENTALAdults with biopsy-proven primary MCD or FSGS and evidence of anti-nephrin antibodies. Children with frequently relapsing, steroid-dependent, or non-genetic steroid-resistant nephrotic syndrome with evidence of anti-nephrin antibodies.
Atacicept Arm 1EXPERIMENTALAtacicept dose A administered subcutaneous (sc) injection monthly
Atacicept Arm 2EXPERIMENTALAtacicept dose B administered subcutaneous (sc) injection monthly
Atacicept Arm 3EXPERIMENTALAtacicept dose C administered subcutaneous (sc) injection monthly
Atacicept Arm 4EXPERIMENTALAtacicept dose D administered subcutaneous (sc) injection weekly
Atacicept Arm 5EXPERIMENTALAtacicept dose E administered subcutaneous (sc) injection weekly for 24 weeks, followed by monthly sc injections
Atacicept 150mg once weekly subcutaneous (SC) injectionEXPERIMENTALOther Names: VT-001

Interventions

NameTypeDescription
AtaciceptBIOLOGICALOnce weekly subcutaneous (SC) injections by prefilled syringe
Placebo to match AtaciceptOTHEROnce weekly subcutaneous (SC) injections by prefilled syringe
Atacicept 150 mgDRUGThe atacicept drug product is available as a ready to use injection solution in the following prefilled syringe (PFS) that is composed of: \*BD Hypak™ SCF™ Barrel Glass barrel 1ml long with staked needle 27G ½" 5B with Rigid Needle Shield BD260 \*BD SCF™ Stopper 1ml long W4023 Flurotec
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites1

Key Inclusion Criteria: * Must have the ability to understand and sign a written informed consent form * Male or female of ≥18 years of age * Total urine protein excretion ≥1.0 g per 24-hour or urine protein to creatinine ratio (UPCR) ≥1.0 mg/mg based on a 24-hour urine sample during the Screening ...

Countries:United States
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Recent Changes (Last 90 Days)

LOWJun 26, 2026NCT06983028Enrollment: 200 → 250
LOWJun 26, 2026NCT06983028Enrollment: 200 → 250
MEDIUMJun 22, 2026NCT06674577Enrollment: 476 → 750
MEDIUMJun 22, 2026NCT06674577Enrollment: 476 → 750

Frequently asked questions about Atacicept

What is Atacicept used for?

Atacicept is an investigational monoclonal antibody being developed for IgA Nephropathy (IgAN), also known as Berger Disease, and for primary membranous nephropathy (pMN). It is currently in Phase 3 clinical development for IgA Nephropathy and is being studied in multiple glomerular diseases.

What does Atacicept target?

Atacicept targets and inhibits TNFSF13B (BAFF) and TNFSF13 (APRIL), two cytokines involved in B-cell activation. By blocking these targets, Atacicept is designed to reduce the production of abnormal antibodies implicated in IgA Nephropathy and other glomerular diseases.

Who makes Atacicept?

Atacicept is being developed by Vera Therapeutics, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol VERA. The company is conducting clinical trials to evaluate the drug's safety and efficacy in patients with IgA Nephropathy and other kidney diseases.

What phase is Atacicept in?

Atacicept is in Phase 3 clinical development for IgA Nephropathy. It has received Breakthrough Therapy designation and Priority Review from the FDA, and it is being studied under an accelerated approval pathway. The drug remains investigational and is not yet approved for any indication.

What clinical trials is Atacicept in?

Atacicept is being evaluated in several clinical trials, including NCT04716231, a Phase 3 study in IgA Nephropathy with 376 participants, and NCT06674577, a long-term rollover study. Additional Phase 2 trials include NCT06983028 in multiple glomerular diseases and NCT07020923 for monthly dosing in IgAN.

Is Atacicept the same as Atacicept 150 mg?

Yes, Atacicept 150 mg refers to the same drug, Atacicept, at a specific dose strength. The 150 mg dose is being studied in clinical trials for IgA Nephropathy and other conditions. The drug is also known by its chemical identifier CHEMBL1742986.