Abstract:
:The apparition of adaptive immunity in Gnathostomata correlates with the expansion of the E-protein family to encompass E2-2, HEB, and E2A. Within the family, E2-2 and HEB are more closely evolutionarily related but their concerted action in hematopoiesis remains to be explored. Here we show that the combined disruption of E2-2 and HEB results in failure to express the early lymphoid program in Common lymphoid precursors (CLPs) and a near complete block in B-cell development. In the thymus, Early T-cell progenitors (ETPs) were reduced and T-cell development perturbed, resulting in reduced CD4 T- and increased γδ T-cell numbers. In contrast, hematopoietic stem cells (HSCs), erythro-myeloid progenitors, and innate immune cells were unaffected showing that E2-2 and HEB are dispensable for the ancestral hematopoietic lineages. Taken together, this E-protein dependence suggests that the appearance of the full Gnathostomata E-protein repertoire was critical to reinforce the gene regulatory circuits that drove the emergence and expansion of the lineages constituting humoral immunity.
journal_name
Front Immunoljournal_title
Frontiers in immunologyauthors
Bouderlique T,Peña-Pérez L,Kharazi S,Hils M,Li X,Krstic A,De Paepe A,Schachtrup C,Gustafsson C,Holmberg D,Schachtrup K,Månsson Rdoi
10.3389/fimmu.2019.00455subject
Has Abstractpub_date
2019-03-18 00:00:00pages
455issn
1664-3224journal_volume
10pub_type
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