Abstract
To identify new immortalizing genes with potential roles in tumorigenesis, we performed a genetic screen aimed to bypass the rapid and tight senescence arrest of primary fibroblasts deficient for the oncogene Bmi1. We identified the T-box member TBX2 as a potent immortalizing gene that acts by downregulating Cdkn2a (p19(ARF)). TBX2 represses the Cdkn2a (p19(ARF)) promoter and attenuates E2F1, Myc or HRAS-mediated induction of Cdkn2a (p19(ARF)). We found TBX2 to be amplified in a subset of primary human breast cancers, indicating that it might contribute to breast cancer development.
MeSH Terms
Adenocarcinoma/genetics,metabolism
Animals
Breast Neoplasms/genetics,metabolism
COS Cells
Carrier Proteins/genetics
Cell Cycle Proteins/genetics,isolation & purification,physiology
Cell Transformation, Neoplastic/genetics
Cells, Cultured
Cellular Senescence/genetics
Chromosomes, Human, Pair 17/genetics
Cyclin-Dependent Kinase Inhibitor p16
DNA-Binding Proteins
E2F Transcription Factors
E2F1 Transcription Factor
Female
Fibroblasts/cytology,metabolism
Gene Amplification
Gene Deletion
Gene Expression Regulation, Neoplastic
Genes, BRCA1
Humans
Mice
Neoplasm Proteins/biosynthesis,genetics,isolation & purification,physiology
Neoplastic Syndromes, Hereditary/genetics
Nuclear Proteins/genetics
Oncogenes
Polycomb Repressive Complex 1
Promoter Regions, Genetic
Protein Biosynthesis
Proteins/genetics
Proto-Oncogene Proteins/genetics
Proto-Oncogene Proteins c-myc/antagonists & inhibitors
Proto-Oncogene Proteins p21(ras)/antagonists & inhibitors
Repressor Proteins/genetics,isolation & purification,physiology
Retinoblastoma-Binding Protein 1
T-Box Domain Proteins/genetics,isolation & purification,physiology
Transcription Factor DP1
Transcription Factors/antagonists & inhibitors
Transfection
Tumor Cells, Cultured
Tumor Suppressor Protein p14ARF
Chemicals
Arid4a protein, mouse
BMI1 protein, human
Bmi1 protein, mouse
Carrier Proteins
Cell Cycle Proteins
Cyclin-Dependent Kinase Inhibitor p16
DNA-Binding Proteins
E2F Transcription Factors
E2F1 Transcription Factor
E2F1 protein, human
E2f1 protein, mouse
Neoplasm Proteins
Nuclear Proteins
Proteins
Proto-Oncogene Proteins
Proto-Oncogene Proteins c-myc
Repressor Proteins
Retinoblastoma-Binding Protein 1
T-Box Domain Protein 2
T-Box Domain Proteins
Transcription Factor DP1
Transcription Factors
Tumor Suppressor Protein p14ARF
Polycomb Repressive Complex 1
HRAS protein, human
Proto-Oncogene Proteins p21(ras)
Authors & Affiliations
11 authors, click to expand affiliations / ORCID
Jacobs J J
Division of Molecular Carcinogenesis, The Netherlands Cancer Institute, Amsterdam, The Netherlands.
Keblusek P
Robanus-Maandag E
Kristel P
Lingbeek M
Nederlof P M
van Welsem T
van de Vijver M J
Koh E Y
Daley G Q
van Lohuizen M