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Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Rep 2021 ; 35 (13): 109320 Nephropedia Template TP
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Memory B cells targeting SARS-CoV-2 spike protein and their dependence on CD4(+) T cell help #MMPMID34146478
Pusnik J; Richter E; Schulte B; Dolscheid-Pommerich R; Bode C; Putensen C; Hartmann G; Alter G; Streeck H
Cell Rep 2021[Jun]; 35 (13): 109320 PMID34146478show ga
Memory B cells seem to be more durable than antibodies and thus crucial for the long-term immunity against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Here we investigate SARS-CoV-2 spike-specific memory B cells and their dependence on CD4(+) T cell help in different settings of coronavirus disease 2019 (COVID-19). Compared with severely ill individuals, those who recovered from mild COVID-19 develop fewer but functionally superior spike-specific memory B cells. Generation and affinity maturation of these cells is best associated with IL-21(+)CD4(+) T cells in recovered individuals and CD40L(+)CD4(+) T cells in severely ill individuals. The increased activation and exhaustion of memory B cells observed during COVID-19 correlates with CD4(+) T cell functions. Intriguingly, CD4(+) T cells recognizing membrane protein show a stronger association with spike-specific memory B cells than those recognizing spike or nucleocapsid proteins. Overall, we identify CD4(+) T cell subsets associated with the generation of B cell memory during SARS-CoV-2 infection.