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Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Curr+Opin+Immunol 2017 ; 45 (ä): 119-25 Nephropedia Template TP
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Role of germinal centers for the induction of broadly-reactive memory B cells #MMPMID28355576
Takahashi Y; Kelsoe G
Curr Opin Immunol 2017[Apr]; 45 (ä): 119-25 PMID28355576show ga
Virus-specific memory B cells (Bmem) play a crucial role in protecting against variant viruses. The ability to recognize these variant viruses, defined as antibody breadth, is achieved in Bmem populations by two very different pathways, germline-encoded cross-reactivity and affinity-driven, somatic evolution in germinal centers (GCs) for conserved viral epitopes. The latter class of broadly-reactive Bmem cells are not cross-reactive per se, but bind epitopes crucial for viral fitness. Although these conserved epitopes are often weakly immunogenic, the GC reaction is surprisingly permissive for the continued survival/proliferation of B cells that bind with low affinity or react to cryptic epitopes, increasing their chance of memory recruitment. In this review, we discuss the adaptive strategies of B-cell memory to viral antigenic variations.