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Myc targets Cks1 to provoke the suppression of p27Kip1, proliferation and lymphomagenesis.
Umeå University, Faculty of Science and Technology, Molecular Biology (Faculty of Science and Technology). (Nilsson)
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2007 (English)In: EMBO J, ISSN 0261-4189, Vol. 26, no 10, 2562-74 p.Article in journal (Refereed) Published
Abstract [en]

Reduced levels of the cyclin-dependent kinase inhibitor p27(Kip1) connote poor prognosis in cancer. In human Burkitt lymphoma and in precancerous B cells and lymphomas arising in Emu-Myc transgenic mice, p27(Kip1) expression is markedly reduced. We show that the transcription of the Cks1 component of the SCF(Skp2) complex that is necessary for p27(Kip1) ubiquitylation and degradation is induced by Myc. Further, Cks1 expression is elevated in precancerous Emu-Myc B cells, and high levels of Cks1 are also a hallmark of Emu-Myc lymphoma and of human Burkitt lymphoma. Finally, loss of Cks1 in Emu-Myc B cells elevates p27(Kip1) levels, reduces proliferation and markedly delays lymphoma development and dissemination of disease. Therefore, Myc suppresses p27(Kip1) expression, accelerates cell proliferation and promotes tumorigenesis at least in part through its ability to selectively induce Cks1.

Place, publisher, year, edition, pages
2007. Vol. 26, no 10, 2562-74 p.
Keyword [en]
Animals, Bone Marrow Cells/cytology, Burkitt Lymphoma/*etiology, CDC2 Protein Kinase/*genetics/metabolism, Cell Proliferation, Crosses; Genetic, Cyclin-Dependent Kinase Inhibitor p27/*antagonists & inhibitors/genetics/physiology, Humans, Lymphoma; B-Cell/genetics/*physiopathology, Mice, Mice; Knockout, Mice; Transgenic, Proto-Oncogene Proteins c-myc/*genetics, Retroviridae/genetics, Tumor Cells; Cultured
Identifiers
URN: urn:nbn:se:umu:diva-16699PubMedID: 17464290OAI: oai:DiVA.org:umu-16699DiVA: diva2:156372
Available from: 2007-10-09 Created: 2007-10-09 Last updated: 2011-01-11Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
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