Cell cycle and developmental control of hematopoiesis by Runx1.
Runx1 binds DNA in cooperation with CBFbeta to activate or repress transcription, dependent upon cellular context and interaction with a variety of co-activators and co-repressors. Runx1 is required for emergence of adult hematopoietic stem cells (HSC) during embryonic development and for lymphoid, myeloid, and megakaryocyte lineage maturation from HSC in adult marrow. Runx1 levels vary during the cell cycle, and Runx1 regulates G1 to S cell cycle progression. Both Cdk and ERK phosphorylate Runx1 to influence its interaction with co-repressors, and the Wnt effector LEF-1/TCF also modulates Runx1 activities. These links likely allow cytokines and signals from adjacent cells to influence HSC proliferation versus quiescence and the rate of progenitor expansion, in response to developmental or environmental demands. J. Cell. Physiol. 219: 520-524, 2009. (c) 2009 Wiley-Liss, Inc.
Friedman
Alan D
AD
Division of Pediatric Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA. afriedm2@jhmi.edu
D053687:Adult Stem Cells / Q000166:cytology; D000818:Animals; D002453:Cell Cycle / Q000502:physiology*; D002454:Cell Differentiation / Q000502:physiology; D050676:Core Binding Factor Alpha 2 Subunit / Q000737:chemistry / Q000235:genetics / Q000502:physiology*; D053595:Embryonic Stem Cells / Q000166:cytology; D006410:Hematopoiesis / Q000502:physiology*; D006412:Hematopoietic Stem Cells / Q000166:cytology; D006801:Humans; D008954:Models, Biological; D015398:Signal Transduction; D015533:Transcriptional Activation
D050676:Core Binding Factor Alpha 2 Subunit