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Nucleic Acids Research 2004 32(18):5368-5378; doi:10.1093/nar/gkh877
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Published online 11 October 2004

Nucleic Acids Research, Vol. 32 No. 18 © Oxford University Press 2004; all rights reserved

Identification of novel Myc target genes with a potential role in lymphomagenesis

Dragan Marinkovic, Tatjana Marinkovic, Eniko Kokai, Thomas Barth1, Peter Möller1 and Thomas Wirth*

Department of Physiological Chemistry and 1 Institute of Pathology, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany

* To whom correspondence should be addressed. Tel: +49 731 502 3270; Fax: +49 731 502 2892; Email: thomas.wirth{at}medizin.uni-ulm.de

Received July 23, 2004; Revised and Accepted September 20, 2004

The c-Myc transcription factor regulates a wide set of genes involved in processes such as proliferation, differentiation and apoptosis. Therefore, altered expression of Myc leads to deregulation of a large number of target genes and, as a consequence, to tumorigenesis. For understanding Myc-induced transformation, identification of these target genes is essential. In this study, we searched for Myc target genes involved in lymphomagenesis using different mouse T and B cell lymphoma cell lines transformed by a conditional Myc-allele. Target genes obtained by microarray experiments were further subjected to a kinetic analysis of mRNA expression upon Myc inactivation/reactivation, bioinformatic examination of Myc binding sites and chromatin immunoprecipitation. This approach allowed us to define targets whose activation is a direct consequence of Myc binding. Among the 38 novel Myc targets, we identified several genes implicated in the tumor development. These genes are not only relevant for mouse lymphomas because we observed their upregulation in human lymphomas as well. Our findings further the understanding of Myc-induced lymphomagenesis and help toward developing more efficient antitumor strategies.


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