title: Association of core-binding factor β with the malignant phenotype of prostate and ovarian cancer cells.
abstract: Core binding factor (CBF) is a transcription factor complex that plays roles in development, stem-cell homeostasis, and human disease. CBF is a heterodimer composed of one of three DNA-binding RUNX proteins plus the non-DNA-binding protein, CBFβ. Recent studies have showed that the RUNX factors exhibit complex expression patterns in prostate, breast, and ovarian cancers, and CBF has been implicated in the control of cancer-related genes. However, the biologic roles of CBF in solid tumors have not been fully elucidated. To test whether CBF is required for the malignant phenotype of various epithelial cancers, we used lentiviral delivery of CBFβ-specific shRNA to significantly decrease CBFβ expression in two prostate cancer cell lines (PPC1 and PC-3) and the SKOV-3 ovarian cancer cell line. We found that knockdown of CBFβ significantly inhibited anchorage independent growth of each cell line. Further, CBFβ knockdown in PPC1 cells suppressed xenograft tumor growth compared to controls. Mice injected with SKOV-3 ovarian cancer cells knocked-down for CBFβ exhibited a survival time similar to control mice. However, human cells recovered from the ascites fluid of these mice showed CBFβ expression levels similar to those from mice injected with control SKOV-3 cells, suggesting that CBFβ knockdown is incompatible with tumor cell growth. Gene expression profiling of CBFβ knockdown cells revealed significant changes in expression in genes involved in various developmental and cell signaling pathways. These data collectively suggest that CBFβ is required for malignancy in some human cancers.
authors.affiliation: Department of Biochemistry and Molecular Biology, Feist-Weiller Cancer Center, Louisiana State University Health Sciences Center, Shreveport, Louisiana 71130, USA.
authors.forename: J Nathan
authors.initials: JN
authors.lastname: Davis
authors.forename: Donna
authors.initials: D
authors.lastname: Rogers
authors.forename: Lisa
authors.initials: L
authors.lastname: Adams
authors.forename: Thomas
authors.initials: T
authors.lastname: Yong
authors.forename: Jette S
authors.initials: JS
authors.lastname: Jung
authors.forename: Bing
authors.initials: B
authors.lastname: Cheng
authors.forename: Katie
authors.initials: K
authors.lastname: Fennell
authors.forename: Erkut
authors.initials: E
authors.lastname: Borazanci
authors.forename: Yara W
authors.initials: YW
authors.lastname: Moustafa
authors.forename: Amanda
authors.initials: A
authors.lastname: Sun
authors.forename: Runhua
authors.initials: R
authors.lastname: Shi
authors.forename: Jonathan
authors.initials: J
authors.lastname: Glass
authors.forename: J Michael
authors.initials: JM
authors.lastname: Mathis
authors.forename: B Jill
authors.initials: BJ
authors.lastname: Williams
authors.forename: Shari
authors.initials: S
authors.lastname: Meyers
mesh_terms: D000818:Animals; D001943:Breast Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D050658:Core Binding Factor beta Subunit / Q000235:genetics / Q000378:metabolism*; D005260:Female; D020869:Gene Expression Profiling; D015972:Gene Expression Regulation, Neoplastic; D055785:Gene Knockdown Techniques; D006801:Humans; D008297:Male; D051379:Mice; D008819:Mice, Nude; D016513:Mice, SCID; D041681:NIH 3T3 Cells; D009368:Neoplasm Transplantation; D010641:Phenotype; D011471:Prostatic Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D034622:RNA Interference; D013997:Time Factors; D014162:Transfection; D047368:Tumor Burden
chemical_list: C493692:CBFB protein, human; D050658:Core Binding Factor beta Subunit