Lin28b controls a neonatal to adult switch in B cell positive selection
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Lin28b controls a neonatal to adult switch in B cell positive selection. / Vanhee, Stijn; Åkerstrand, Hugo; Kristiansen, Trine Ahn; Datta, Sebak; Montano, Giorgia; Vergani, Stefano; Lang, Stefan; Ungerbäck, Jonas; Doyle, Alexander; Olsson, Karin; Beneventi, Giulia; Jensen, Christina T.; Bellodi, Cristian; Soneji, Shamit; Sigvardsson, Mikael; Gyllenbäck, Elin Jaensson; Yuan, Joan.
I: Science Immunology, Vol. 4, Nr. 39, eaax4453, 2019.Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift
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TY - JOUR
T1 - Lin28b controls a neonatal to adult switch in B cell positive selection
AU - Vanhee, Stijn
AU - Åkerstrand, Hugo
AU - Kristiansen, Trine Ahn
AU - Datta, Sebak
AU - Montano, Giorgia
AU - Vergani, Stefano
AU - Lang, Stefan
AU - Ungerbäck, Jonas
AU - Doyle, Alexander
AU - Olsson, Karin
AU - Beneventi, Giulia
AU - Jensen, Christina T.
AU - Bellodi, Cristian
AU - Soneji, Shamit
AU - Sigvardsson, Mikael
AU - Gyllenbäck, Elin Jaensson
AU - Yuan, Joan
PY - 2019
Y1 - 2019
N2 - The ability of B-1 cells to become positively selected into the mature B cell pool, despite being weakly self-reactive, has puzzled the field since its initial discovery. Here, we explore changes in B cell positive selection as a function of developmental time by exploiting a link between CD5 surface levels and the natural occurrence of self-reactive B cell receptors (BCRs) in BCR wild-type mice. We show that the heterochronic RNA binding protein Lin28b potentiates a neonatal mode of B cell selection characterized by enhanced overall positive selection in general and the developmental progression of CD5+ immature B cells in particular. Lin28b achieves this by amplifying the CD19/PI3K/c-Myc positive feedback loop, and ectopic Lin28b expression restores both positive selection and mature B cell numbers in CD19-/- adult mice. Thus, the temporally restricted expression of Lin28b relaxes the rules for B cell selection during ontogeny by modulating tonic signaling. We propose that this neonatal mode of B cell selection represents a cell-intrinsic cue to accelerate the de novo establishment of the adaptive immune system and incorporate a layer of natural antibody-mediated immunity throughout life.
AB - The ability of B-1 cells to become positively selected into the mature B cell pool, despite being weakly self-reactive, has puzzled the field since its initial discovery. Here, we explore changes in B cell positive selection as a function of developmental time by exploiting a link between CD5 surface levels and the natural occurrence of self-reactive B cell receptors (BCRs) in BCR wild-type mice. We show that the heterochronic RNA binding protein Lin28b potentiates a neonatal mode of B cell selection characterized by enhanced overall positive selection in general and the developmental progression of CD5+ immature B cells in particular. Lin28b achieves this by amplifying the CD19/PI3K/c-Myc positive feedback loop, and ectopic Lin28b expression restores both positive selection and mature B cell numbers in CD19-/- adult mice. Thus, the temporally restricted expression of Lin28b relaxes the rules for B cell selection during ontogeny by modulating tonic signaling. We propose that this neonatal mode of B cell selection represents a cell-intrinsic cue to accelerate the de novo establishment of the adaptive immune system and incorporate a layer of natural antibody-mediated immunity throughout life.
U2 - 10.1126/sciimmunol.aax4453
DO - 10.1126/sciimmunol.aax4453
M3 - Article
C2 - 31562190
AN - SCOPUS:85072704797
VL - 4
JO - Science Immunology
JF - Science Immunology
SN - 2470-9468
IS - 39
M1 - eaax4453
ER -