Runx2: A novel oncogenic effector revealed by in vivo complementation and retroviral tagging

Blyth, K. , Terry, A., Mackay, N., Vaillant, F., Bell, M., Cameron, E.R. , Neil, J.C. and Stewart, M. (2001) Runx2: A novel oncogenic effector revealed by in vivo complementation and retroviral tagging. Oncogene, 20(3), pp. 295-302. (doi: 10.1038/sj.onc.1204090) (PMID:11313958)

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Abstract

The Runx2 (Cbfa1, Pebp2αA, Aml3) gene was previously identified as a frequent target for transcriptional activation by proviral insertion in T-cell lymphomas of CD2-MYC transgenic mice. We have recently shown that over-expression of the full-length, most highly expressed Runx2 isoform in the thymus perturbs T-cell development, leads to development of spontaneous lymphomas at low frequency and is strongly synergistic with Myc. To gain further insight into the relationship of Runx2 to other lymphomagenic pathways, we tested the effect of combining the CD2-Runx2 transgene either with a Pim1 transgene (Eμ-Pim1) or with the p53 null genotype, as each of these displays independent synergy with Myc. In both cases we observed synergistic tumour development. However, Runx2 appeared to have a dominant effect on the tumour phenotype in each case, with most tumours conforming to the CD3+, CD8+, CD4+/− phenotype seen in CD2-Runx2 mice. Neonatal infection of CD2-Runx2 mice with Moloney murine leukaemia virus (Moloney MLV) also led to a dramatic acceleration of tumour onset. Analysis of known Moloney MLV target genes in these lymphomas showed a high frequency of rearrangement at c-Myc or N-Myc (82%), and a significant number at Pim1 or Pim2 (23%), and at Pal1/Gfi1 (18%). These results indicate that Runx2 makes a distinct contribution to T-cell lymphoma development which does not coincide with any of the oncogene complementation groups previously identified by retroviral tagging.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Bell, Mrs Margaret and Blyth, Professor Karen and Stewart, Dr Monica and Cameron, Professor Ewan and Neil, Professor James
Authors: Blyth, K., Terry, A., Mackay, N., Vaillant, F., Bell, M., Cameron, E.R., Neil, J.C., and Stewart, M.
College/School:College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation
College of Medical Veterinary and Life Sciences > School of Veterinary Medicine
College of Medical Veterinary and Life Sciences > Institute of Cancer Sciences
Journal Name:Oncogene
Publisher:Nature Publishing Group
ISSN:0950-9232
ISSN (Online):1476-5594
Published Online:12 March 2001

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