CD27hiCD38hi plasmablasts are activated B cells of mixed origin with distinct function.

IScience
Angeline RouersKatja Fink

Abstract

Clinically important broadly reactive B cells evolve during multiple infections, with B cells re-activated after secondary infection differing from B cells activated after a primary infection. Here we studied CD27highCD38high plasmablasts from patients with a primary or secondary dengue virus infection. Three transcriptionally and functionally distinct clusters were identified. The largest cluster 0/1 was plasma cell-related, with cells coding for serotype cross-reactive antibodies of the IgG1 isotype, consistent with memory B cell activation during an extrafollicular response. Cells in clusters 2 and 3 expressed low levels of antibody genes and high levels of genes associated with oxidative phosphorylation, EIF2 pathway, and mitochondrial dysfunction. Clusters 2 and 3 showed a transcriptional footprint of T cell help, in line with activation from naive B cells or memory B cells. Our results contribute to the understanding of the parallel B cell activation events that occur in humans after natural primary and secondary infection.

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Citations

Sep 16, 2021·Journal of Virology·Charu AggarwalAnmol Chandele

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Software Mentioned

Connectivity Map ( CMap )
SINGuLAR
GSEA
FACSDiva
SINGuLAR toolset
tSNE
MiXCR
scPred
Loupe Cell Browser
seq2

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