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A dose-dependent role for EBF1 in repressing non-B-cell-specific genes

In English

Författare

  • Kara Lukin
  • Scott Fields
  • Lisa Guerrettaz
  • Desiree Straign
  • Valerie Rodriguez
  • Sasan Zandi
  • Robert Månsson
  • John C. Cambier
  • Mikael Sigvardsson
  • James Hagman

Summary, in English

In the absence of early B-cell factor 1 (EBF1), B-cell development is arrested at an uncommitted progenitor stage that exhibits increased lineage potentials. Previously, we investigated the roles of EBF1 and its DNA-binding partner Runx1 by evaluating B lymphopoiesis in single (EBF1(het) and Runx1(het)) and compound haploinsufficent (Ebf1(+/-) Runx1(+/-), ERhet) mice. Here, we demonstrate that decreased Ebf1 gene dosage results in the inappropriate expression of NK-cell lineage-specific genes in B-cell progenitors. Moreover, prolonged expression of Ly6a/Sca-1 suggested the maintenance of a relatively undifferentiated phenotype. These effects were exacerbated by reduced expression of Runx1 and occurred despite expression of Pax5. Repression of inappropriately expressed genes was restored in most pre-B and all immature B cells of ERhet mice. Enforced EBF1 expression repressed promiscuous transcription in pro-B cells of ERhet mice and in Ebf1(-/-) Pax5(-/-) fetal liver cells. Together, our studies suggest that normal levels of EBF1 are critical for maintaining B-cell identity by directing repression of non-B-cell-specific genes.

Publiceringsår

2011

Språk

Engelska

Sidor

1787-1793

Publikation/Tidskrift/Serie

European Journal of Immunology

Volym

41

Issue

6

Dokumenttyp

Artikel i tidskrift

Förlag

John Wiley & Sons Inc.

Ämne

  • Immunology in the medical area

Nyckelord

  • B-cell development
  • Gene regulation
  • NK cells
  • Transcription factors

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1521-4141