Transcription Factor T-bet in B cells modulates germinal center polarization and antibody affinity maturation in response to malaria
Details
Publication Year 2019-11-19, Volume 29, Issue #8, Page 2257-2269 e6
Journal Title
Cell Reports
Publication Type
Journal Article
Abstract
Despite the key role that antibodies play in protection, the cellular processes mediating the acquisition of humoral immunity against malaria are not fully understood. Using an infection model of severe malaria, we find that germinal center (GC) B cells upregulate the transcription factor T-bet during infection. Molecular and cellular analyses reveal that T-bet in B cells is required not only for IgG2c switching but also favors commitment of B cells to the dark zone of the GC. T-bet was found to regulate the expression of Rgs13 and CXCR3, both of which contribute to the impaired GC polarization observed in the absence of T-bet, resulting in reduced IghV gene mutations and lower antibody avidity. These results demonstrate that T-bet modulates GC dynamics, thereby promoting the differentiation of B cells with increased affinity for antigen.
Publisher
Elsevier
WEHI Research Division(s)
Infectious Diseases And Immune Defence; Bioinformatics; Immunology
PubMed ID
31747599
Open Access at Publisher's Site
https://doi.org/10.1016/j.celrep.2019.10.087
NHMRC Grants
NHMRC/1058665 NHMRC/1137989
Rights Notice
Refer to copyright notice on published article.


Creation Date: 2019-12-05 01:26:21
Last Modified: 2020-02-11 09:03:26
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