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C3 glomerulopathy: advancements in diagnostics and therapeutics
Shubham Dixit1, Yongen Chang1, Rebecca S Ahdoot1
1University of California Irvine, Department of Medicine - Division of Nephrology.
Current Opinion in Nephrology and Hypertension
|November 10, 2025
Summary
Recent advancements in C3 glomerulopathy (C3G) include new diagnostic tools and targeted therapies like Factor B and C3 blockade. These developments offer improved understanding and treatment options for this complex kidney disease.
Area of Science:
- Nephrology
- Complement System Biology
- Glomerular Diseases
Background:
- C3 glomerulopathy (C3G) is a complex kidney disease with evolving diagnostic and therapeutic landscapes.
- Recent years have seen significant progress in understanding its underlying mechanisms and clinical manifestations.
Purpose of the Study:
- To provide an update on recent discoveries in C3 glomerulopathy for nephrologists and researchers.
- To review new diagnostic, genetic, molecular, and therapeutic developments in the field.
Main Methods:
- Review of recent literature on C3 glomerulopathy.
- Analysis of emerging diagnostic techniques and genetic testing.
- Evaluation of new pharmacological agents and clinical trials.
Main Results:
- C3G encompasses a spectrum of disorders, including dense deposit disease, with emerging related pathologies.
- Genetic testing reveals links between alternative complement pathway, nephritic antibodies, and C3G etiology.
- Two new FDA-approved drugs, iptacopan (Factor B blockade) and pegetacoplan (C3 blockade), represent significant therapeutic advances.
Conclusions:
- Updated nomenclature and taxonomy are essential for classifying C3G and related conditions.
- Landmark clinical trials like APPEAR-C3G and VALIANT provide critical insights into treatment efficacy.
- Clinicians and researchers benefit from timely updates on diagnostic and therapeutic progress in C3G.
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