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A Phase 3, Randomized, Double-blind, Placebo-controlled Study of Felzartamab in Adults with IgA Nephropathy (299IG301 / PREVAIL)

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-519345-30-00
Acronym
299IG301
Enrollment
201
Registered
2025-09-23
Start date
2025-11-12
Completion date
Unknown
Last updated
2025-10-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

IgA nephropathy

Brief summary

Percent Change From Baseline in Proteinuria as Measured by the Urine Protein: Creatinine Ratio (UPCR)

Detailed description

Change From Baseline in Estimated Glomerular Filtration Rate (eGFR) Values Calculated Using the Chronic Kidney Disease Epidemiology (CKD-EPI) Creatinine Equation, Percentage of participants who progressed to Kidney Malfunction. The percentage of participants progressing to kidney malfunction will be reported based on one of the following, 1. ≥ 40% reduction in eGFR sustained for ≥ 30 days; 2. eGFR < 15 mL/min/1.73m2 for ≥ 30 days; 3. Undergoing dialysis for ≥ 30 days; 4. Undergoing kidney transplantation; 5. Died from kidney failure, Percentage of participants requiring rescue therapy, Felzartamab serum concentrations over time, Number of patients with anti-drug antibodies (ADAs) against felzartamab, Percentage of Participants With Treatment Emergent Adverse Event (TEAE) and Treatment Emergent Serious Adverse Event (TESAE), Number of Participants With Clinically Significant Change From Baseline in Vital Signs Abnormalities, Number of Participants With Clinically Significant Change From Baseline in Physical Examination Abnormalities, Percentage of participants Achieving complete response (CR) CR is defined as UPCR value (based on 24-hour urine collection) of <0.5 gram per gram (g/g), a reduction in UPCR of ≥50%, and a stable eGFR (decrease from baseline in eGFR of ≤25%), Change in Baseline in EGFR Values Calculated Using the CKD-EPI Creatinine Equation, Number of Participants With Clinically Significant Change From Baseline in Laboratory Abnormalities, Number of Participants With Clinically Significant Change From Baseline in Electrocardiogram (ECG) Abnormalities

Interventions

DRUG0.9% Saline
DRUGLORATADINE
DRUGLEVOCETIRIZINE
DRUGFAMOTIDINE
DRUGPARACETAMOL
DRUGDESLORATADINE
DRUGFEXOFENADINE
DRUGCETIRIZINE
DRUGDIPHENHYDRAMINE
DRUGMETHYLPREDNISOLONE

Sponsors

Biogen Idec Research Limited
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Percent Change From Baseline in Proteinuria as Measured by the Urine Protein: Creatinine Ratio (UPCR)

Secondary

MeasureTime frame
Change From Baseline in Estimated Glomerular Filtration Rate (eGFR) Values Calculated Using the Chronic Kidney Disease Epidemiology (CKD-EPI) Creatinine Equation, Percentage of participants who progressed to Kidney Malfunction. The percentage of participants progressing to kidney malfunction will be reported based on one of the following, 1. ≥ 40% reduction in eGFR sustained for ≥ 30 days; 2. eGFR < 15 mL/min/1.73m2 for ≥ 30 days; 3. Undergoing dialysis for ≥ 30 days; 4. Undergoing kidney transplantation; 5. Died from kidney failure, Percentage of participants requiring rescue therapy, Felzartamab serum concentrations over time, Number of patients with anti-drug antibodies (ADAs) against felzartamab, Percentage of Participants With Treatment Emergent Adverse Event (TEAE) and Treatment Emergent Serious Adverse Event (TESAE), Number of Participants With Clinically Significant Change From Baseline in Vital Signs Abnormalities, Number of Participants With Clinically Significant Change F

Countries

Belgium, Bulgaria, Croatia, Czechia, France, Germany, Greece, Italy, Poland, Portugal, Spain

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026