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Complement 3 Glomerulopathy Revisited: Bridging Pathogenesis and Therapy in the New Era
Federico Yandian1, Fernando C Fervenza2, Fernando Caravaca-Fontán3
1Department of Nephrology, Hospital de Clínicas "Dr. Manuel Quintela", Montevideo, Uruguay.
None:
Complement 3 glomerulopathy is a rare and highly heterogeneous complement-mediated kidney disease characterized by the aberrant deposition of complement components in the glomeruli, triggering inflammation and contributing to progressive kidney function impairment. Despite recent advancements in understanding complement 3 glomerulopathy pathophysiology, therapeutic options remain limited. Current treatments often fail to prevent poor outcomes, with 30-50% of adult patients progressing to kidney failure and high rates of disease recurrence following kidney transplantation. Genetic studies have revealed that variants in complement regulators and effectors contribute to disease susceptibility in a subset of patients, although autoantibody-driven mechanisms account for most cases. Encouraging results from recent clinical trials provide hope for improving the overall prognosis of this entity, yet critical knowledge gaps persist. This review explores the heterogeneity of complement 3 glomerulopathy and examines the emerging therapeutic landscape, highlighting advancements in the management of this complex condition.
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