Lineage-specific transcription factors in multipotent hematopoietic progenitors: a little bit goes a long way

Cell Cycle. 2007 May 2;6(9):1035-9. doi: 10.4161/cc.6.9.4208. Epub 2007 May 29.

Abstract

Basal expression of lineage-specific transcription factors (TFs) in multipotent hematopoietic progenitor cells (HPCs) plays a pivotal role in normal hematopoiesis. Indeed, the interplay between lineage-specific TFs and chromatin modifying or remodeling complexes allows chromatin modifications at specific hematopoietic loci and promotes transcriptionally prone conformations. During hematopoiesis, the expression of various lineage-specific genes can be preceded by their potentiation i.e., by chromatin activation, in progenitor cells. Gene potentiation appears to counterbalance epigenetic silencing of lineage-specific genes in early progenitors, while maintaining an accessible chromatin conformation in the lineage pathway selected. Herein, we discuss the impact of lineage-specific TFs on gene potentiation and priming in normal hematopoiesis, and emphasize the complementary role of locus control region (LCR) or LCR-like structures and promoter regions in gene-specific potentiation events.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Animals
  • Cell Lineage*
  • Globins / genetics
  • Globins / metabolism
  • Hematopoiesis / physiology
  • Hematopoietic Stem Cells / metabolism*
  • Humans
  • Locus Control Region
  • Models, Biological
  • Promoter Regions, Genetic
  • Transcription Factors / metabolism*

Substances

  • Transcription Factors
  • Globins