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IgM contributes to glomerular injury in FSGS (CROSBI ID 201885)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Strassheim, D. ; Renner, B. : Panzer, S. ; Fuquay, R. ; Kulik, L. ; Galešić Ljubanović, Danica ; Holers, V.M. ; Thurman, J.M. IgM contributes to glomerular injury in FSGS // Journal of the American Society of Nephrology, 24 (2013), 3; 393-406. doi: 10.1681/ASN.2012020187

Podaci o odgovornosti

Strassheim, D. ; Renner, B. : Panzer, S. ; Fuquay, R. ; Kulik, L. ; Galešić Ljubanović, Danica ; Holers, V.M. ; Thurman, J.M.

engleski

IgM contributes to glomerular injury in FSGS

Glomerular IgM and C3 deposits frequently accompany idiopathic FSGS and secondary glomerulosclerosis, but it is unknown whether IgM activates complement, possibly contributing to the pathogenesis of these diseases. We hypothesized that IgM natural antibody binds to neoepitopes exposed in the glomerulus after nonimmune insults, triggering activation of the complement system and further injury. We examined the effects of depleting B cells, using three different strategies, on adriamycin-induced glomerulosclerosis. First, we treated wild-type mice with an anti-murine CD20 antibody, which depletes B cells, before disease induction. Second, we evaluated adriamycin-induced glomerulosclerosis in Jh mice, a strain that lacks mature B cells. Third, we locally depleted peritoneal B cells via hypotonic shock before disease induction. All three strategies reduced deposition of IgM in the glomerulus after administration of adriamycin and attenuated the development of albuminuria. Furthermore, we found that glomerular IgM and C3 were detectable in a subset of patients with FSGS ; C3 was present as an activation fragment and colocalized with glomerular IgM, suggesting that glomerular IgM may have bound a cognate ligand. Taken together, these results suggest that IgM activates the complement system within the glomerulus in an animal model of glomerulosclerosis. Strategies that reduce IgM natural antibody or that prevent complement activation may slow the progression of glomerulosclerosis.

FSGS; glomerular injury; IgM

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Podaci o izdanju

24 (3)

2013.

393-406

objavljeno

1046-6673

10.1681/ASN.2012020187

Povezanost rada

Kliničke medicinske znanosti

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