Genomic promoter occupancy of runt-related transcription factor RUNX2 in Osteosarcoma cells identifies genes involved in cell adhesion and motility
AuthorsVan der Deen, Margaretha
Lapointe, David S.
Young, Daniel W.
Montecino, Martin A.
Lian, Jane B.
Stein, Janet L.
Stein, Gary S.
Van Wijnen, Andre J.
UMass Chan AffiliationsDepartment of Microbiology and Physiological Systems
Department of Cell Biology
Document TypeJournal Article
Cell Line, Tumor
Core Binding Factor Alpha 1 Subunit
Oligonucleotide Array Sequence Analysis
RNA Polymerase II
MetadataShow full item record
AbstractRunt-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, TGFbeta, TNFalpha, 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.
SourceJ Biol Chem. 2012 Feb 10;287(7):4503-17. Epub 2011 Dec 9. Link to article on publisher's site
Permanent Link to this Itemhttp://hdl.handle.net/20.500.14038/49574
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