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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Nat+Immunol 2017 ; 18 (10): 1150-9 Nephropedia Template TP
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Caveolin-1-dependent BCR nanoscale organization regulates B cell tolerance #MMPMID28805811
Minguet S; Kläsener K; Schaffer AM; Fiala GJ; Osteso-Ibánez T; Raute K; Navarro-Lérida I; Hartl FA; Seidl M; Reth M; Del Pozo MA
Nat Immunol 2017[Oct]; 18 (10): 1150-9 PMID28805811show ga
Caveolin-1 (Cav1) regulates plasma membrane nano-organization and compartmentalization. Here, we demonstrate that Cav1 controlled the distribution of immunoglobulin M (IgM)- and IgD- B cell antigen receptor (BCR) nanoclusters on the surface of B cells. In mature B cells, the IgM-BCR gained access to GM1-enriched lipid domains upon antigen stimulation by a process that was dependent on Cav1 phosphorylation by Src family kinases, thereby regulating BCR signaling in vivo. In Cav1?/? immature B cells, altered IgM-BCR nanoscale organization resulted in a failure of receptor editing, and a skewed repertoire of B cells expressing ? heavy chains (HCs) with hallmarks of poly- and auto-reactivity, which ultimately led to autoimmunity in mice. Thus, Cav1 emerges as a cell-intrinsic regulator that prevents B cell-induced autoimmunity by means of its role in plasma membrane organization.