Genomic promoter occupancy of Runt-related transcription factor RUNX2 in osteosarcoma cells identifies genes involved in cell adhesion and motility

Margaretha Van Der Deen, Jacqueline Akech, David Lapointe, Sneha Gupta, Daniel W. Young, Martin A. Montecino, Mario Galindo, Jane B. Lian, Janet L. Stein, Gary S. Stein, Andre J. Van Wijnen

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58 Scopus citations

Abstract

Runt-related transcription factors (RUNX1, RUNX2, and RUNX3) are key lineage-specific regulators of progenitor cell growth and differentiation but also function pathologically as cancer genes that contribute to tumorigenesis. RUNX2 attenuates growth and stimulates maturation of osteoblasts during bone formation but is also robustly expressed in a subset of osteosarcomas, as well as in metastatic breast and prostate tumors. To assess the biological function of RUNX2 in osteosarcoma cells, we examined human genomic promoter interactions for RUNX2 using chromatin immunoprecipitation (ChIP)-microarray analysis in SAOS-2 cells. Promoter binding of both RUNX2 and RNA polymerase II was compared with gene expression profiles of cells in which RUNX2 was depleted by RNA interference. Many RUNX2-bound loci (1550 of 2339 total) exhibit promoter occupancy by RNA polymerase II and contain the RUNX consensus motif 5′-((T/A/C)G(T/A/ C)GG(T/G). Gene ontology analysis indicates that RUNX2 controls components of multiple signaling pathways (e.g. WNT, TGFβ, TNFα, and interleukins), as well as genes linked to cell motility and adhesion (e.g. the focal adhesion-related genes FAK/PTK2 and TLN1). Our results reveal that siRNA depletion of RUNX2, PTK2, or TLN1 diminishes motility of U2OS osteosarcoma cells. Thus, RUNX2 binding to diverse gene loci may support the biological properties of osteosarcoma cells.

Original languageEnglish (US)
Pages (from-to)4503-4517
Number of pages15
JournalJournal of Biological Chemistry
Volume287
Issue number7
DOIs
StatePublished - Feb 10 2012

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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    Van Der Deen, M., Akech, J., Lapointe, D., Gupta, S., Young, D. W., Montecino, M. A., Galindo, M., Lian, J. B., Stein, J. L., Stein, G. S., & Van Wijnen, A. J. (2012). Genomic promoter occupancy of Runt-related transcription factor RUNX2 in osteosarcoma cells identifies genes involved in cell adhesion and motility. Journal of Biological Chemistry, 287(7), 4503-4517. https://doi.org/10.1074/jbc.M111.287771