Autoantibodies against nephrin elucidate a novel autoimmune phenomenon in proteinuric kidney disease
Watts, A. J.; Keller, K. H.; Lerner, G.; Rosales, I.; Collins, A. B.; Sekulic, M.; Waikar, S.; Chandraker, A.; Riella, L. V.; Alexander, M. P.; Troost, J. P.; Chen, J.; Fermin, D.; Yee, J. L.; Sampson, M.; Beck, L. H.; Henderson, J. M.; Greka, A.; Rennke, H. G.; Weins, A.
Show abstract
Dysfunction of podocytes, cells critical for glomerular filtration, underlies proteinuria and kidney failure. Genetic forms of proteinuric kidney disease can be caused by mutations in several podocyte genes, including nephrin, a critical component of the kidney filter. In contrast, the etiology of acquired acute-onset nephrotic syndrome has remained elusive. Here we identify autoantibodies against nephrin in serum and glomeruli of a subset of adults and children with non-congenital acute nephrotic syndrome. Our findings align with published experimental animal studies and elucidate a novel autoimmune phenomenon in proteinuric kidney disease interfering with glomerular filter integrity.
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