Efficacy and Safety of Sibeprenlimab in IgA Nephropathy: Interim Analysis of the China Cohort in the Phase 3 VISIONARY Trial
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ID: 319902
2026
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Abstract
Abstract Background Immunoglobulin A (IgA) nephropathy is a progressive immune-mediated chronic kidney disease with a high prevalence and disease burden in East Asia, including China. In a prespecified interim analysis (IA) of the global phase 3 VISIONARY trial, treatment with sibeprenlimab led to significant placebo-adjusted reduction in 24-hour urine protein to creatinine ratio (uPCR-24h) of 51.2% (P<0.0001) at 9 months. Here, we report the interim efficacy and safety findings for sibeprenlimab for patients with IgA nephropathy enrolled from mainland China as part of the main global population. Methods Patients (N=102) were randomized 1:1 to receive sibeprenlimab 400 mg or placebo subcutaneously Q4W for 26 doses. Patients who completed the 9-month uPCR-24h assessment were included. The primary endpoint was change in uPCR-24h from baseline at 9 months. The key secondary endpoint of annualized eGFR slope over 24 months will be reported at trial completion. Other secondary and exploratory endpoints included spot uPCR, proteinuria remission, haematuria resolution, reduction in biomarker levels (including Gd-IgA1 and APRIL [a proliferation-inducing ligand]), and safety. Results By the China IA data cutoff (January 2025), 42 patients from mainland China completed the 9-month uPCR-24h assessment (sibeprenlimab, n=25; placebo, n=17) and were included in the efficacy analysis. At 9 months, a reduction from baseline in uPCR-24h of 63.1% was observed in sibeprenlimab-treated patients versus a decrease of 3.1% in the placebo group, corresponding to a placebo-adjusted reduction of 61.9% (95% CI 43.2%-74.5%). Spot uPCR declined by week 4 and was sustained through month 12. Sibeprenlimab reduced Gd-IgA1 (67.3%) and suppressed APRIL levels (97.7%) from baseline at week 48. The incidence of treatment-emergent adverse events was similar between treatment groups. Conclusions Interim efficacy and safety results for the mainland China cohort were consistent with the IA of the global cohort of the VISIONARY trial (ClinicalTrials.gov: NCT05248646).
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| Authors | Hong Zhang, Adrian Liew, Muh Geot Wong, Deqiong Xie, Caili Wang, Wanhong Lu, Guisen Li, Jing Xia, Cecile Fajardo, Jeffrey Hafkin, Jicheng Lv |
| Journal | clinical kidney journal |
| Year | 2026 |
| DOI |
10.1093/ckj/sfag222
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| URL | |
| Keywords | Keywords not found |
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