Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 2 and up

Atacicept for multiple autoimmune glomerular diseases

Official title: A Phase 2 Study to Evaluate the Safety and Efficacy of Atacicept in Multiple Autoimmune Glomerular Diseases (PIONEER)

Run by Vera Therapeutics, Inc. · NCT06983028 · Data updated 2026-11-12

This will test whether weekly injections of atacicept can lower protein in the urine and help preserve kidney function in people aged 10 and older with IgA nephropathy, primary membranous nephropathy, or nephrotic syndromes such as MCD and FSGS.

Quick facts

PhasePhase 2
Study typeInterventional
Ages2 Years and up
SexAll
Enrollment250 (estimated)
SponsorVera Therapeutics, Inc.
Industry-sponsored
Locations1 site (Brisbane, California)
StatusRecruiting
StartedJuly 7, 2025
Main results expectedNovember 2027
Study endsNovember 2027
Registry record updatedJune 26, 2026
Trial IDNCT06983028 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are people aged 10 or older who weigh at least 40 kg, are on a stable standard-of-care regimen, and meet disease-specific criteria such as biopsy-proven IgAN or pMN with required UPCR and antibody thresholds and acceptable baseline kidney function.

Probably not a fit

Patients with advanced kidney failure below the study thresholds, those who do not meet biopsy or biomarker criteria, children under 10 or under 40 kg, or those with unstable blood pressure are unlikely to qualify or benefit from this protocol.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This Phase 2 interventional trial gives weekly subcutaneous injections of atacicept to adolescent and adult participants with a range of autoimmune glomerular diseases to characterize safety, tolerability, and effects on proteinuria and renal function. Participants must be on a stable standard-of-care regimen and meet disease-specific criteria such as biopsy confirmation for IgAN or pMN and UPCR thresholds. Key outcome measures include adverse events, changes in urine protein-to-creatinine ratio, and measures of eGFR over the treatment period. The trial is sponsored by Vera Therapeutics and conducted at their Brisbane, California site.

Why it matters

Potential benefit: If successful, atacicept could reduce proteinuria and slow loss of kidney function in people with these autoimmune glomerular diseases.

How similar studies have gone: Other B-cell/BAFF-APRIL–targeting therapies have shown benefit in some autoimmune kidney conditions, but atacicept's use across these glomerular diseases is relatively novel and not yet proven.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Weight of at least 40 kg
* On a stable prescribed standard of care (SoC) treatment regimen according to local guidelines and the specific requirements for each disease
* Systolic blood pressure ≤160 mmHg and diastolic blood pressure ≤90 mmHg at Screening.

Diagnosis of IgAN, IgAVN, pMN, MCD, FSGS, or primary nephrotic syndrome

For patients enrolling in IgAN cohorts (eligibility varies by cohort):

* Age ≥ 18 years
* Biopsy proven IgAN, IgAVN, or recurrent IgAN in kidney transplant
* UPCR ≥ 0.5 g/g or UPE ≥ 0.5 g/day on 24h urine
* eGFR≥ 20 mL/min/1.73m2

For patients enrolling in pediatric IgAN Cohorts (eligibility varies by cohort):

* Age ≥ 2 years and \< 18 years
* Biopsy proven IgAN or IgAVN
* On stable prescribed regimen of RAASi (or SoC) for at least 8 weeks
* UPCR ≥ 1.0 g/g or UPE ≥ 1.0 g/d on 24h urine
* eGFR≥ 30 mL/min/1.73m2

For patients enrolling in pMN cohorts (eligibility varies by cohort):

* Age ≥ 18 years
* Biopsy-proven pMN
* Anti PLA2R antibodies ≥ 25 RU/mL
* UPCR ≥ 1.5 g/g or UPE ≥ 1.5 g/d on 24h urine
* At low risk for spontaneous remission (based on severity or duration of disease)

For patients enrolling in Nephrotic Syndrome cohorts (MCD, FSGS, or pediatric idiopathic nephrotic syndrome):

* Age ≥ 10 years
* eGFR ≥30 mL/min/1.73m2
* Adults with biopsy diagnosis of primary MCD or FSGS (adults) or children with challenging clinical course with steroids (frequenlty relapsing, steroid-dependent, or steroid-resistant)
* UPCR ≥ 1.0 g/g or UPE ≥ 1.0 g/d on 24h urine
* Evidence of anti-nephrin antibodies

Key Exclusion Criteria:

* Evidence of rapidly progressive glomerulonephritis (loss of ≥50% of eGFR) within 12 weeks prior to and at Screening)
* Active viral or bacterial infections
* Existing conditions or clinically significant laboratory abnormalities that may interfere with participation in this study
* Administration of live and live-attenuated vaccinations within 30 days prior to enrollment
* Immunosuppressant medications within 4 weeks prior to dosing with atacicept (except transplant maintenance immunosuppression).
* Known hypersensitivity to atacicept or any component of the formulated atacicept
* Additional criteria apply to each cohort/disease.

Where it's running

  • Vera Therapeutics
    Brisbane, California, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.