These two authors contributed equally to this work.
Potential for treatment of liposarcomas with the MDM2 antagonist Nutlin-3A
Article first published online: 12 MAR 2007
Copyright © 2007 Wiley-Liss, Inc.
International Journal of Cancer
Volume 121, Issue 1, pages 199–205, 1 July 2007
How to Cite
Müller, C. R., Paulsen, E. B., Noordhuis, P., Pedeutour, F., Sæter, G. and Ola Myklebost (2007), Potential for treatment of liposarcomas with the MDM2 antagonist Nutlin-3A. Int. J. Cancer, 121: 199–205. doi: 10.1002/ijc.22643
- Issue published online: 24 APR 2007
- Article first published online: 12 MAR 2007
- Manuscript Accepted: 18 JAN 2007
- Manuscript Received: 13 SEP 2006
- The FUGE programe of the Norwegian Research Council, Norwegian Foundation for Health and Rehabilitation
- Norwegian Cancer Society
- Comité des Alpes-Maritimes de la Ligue Nationale Contre le Cancer
The MDM2-antagonist Nutlin 3A can efficiently induce apoptosis in osteosarcoma cell lines with amplified MDM2. However, Nutlin-based therapy could be even more important in more common sarcoma types where this aberration is frequent. The well- and de-differentiated liposarcomas have complex marker chromosomes, consistently including multiple copies of the MDM2 locus. Since amplification seems to be a primary aberration in these tumors, whereas amplification in osteosarcoma generally is a progression marker, the underlying biological mechanisms may be different. We have therefore investigated the molecular response to Nutlin treatment in several liposarcoma cell lines with such markers, as well as a panel of other sarcoma cell lines. We report that Nutlin efficiently stabilized p53 and induced downstream p53 dependent transcription and apoptosis in liposarcoma cells with amplified MDM2 in vitro. Some effect of Nutlin was also observed on cell lines without amplified MDM2 but with wt TP53, but no apoptosis was induced. The MDM4 protein, reported to interfere with the reactivation of p53, was undetectable in cells with amplified MDM2. Thus, Nutlin represents a promising new therapeutic principle for the treatment of an increasing group of sarcomas. © 2007 Wiley-Liss, Inc.