The circadian gene Period2 plays an important role in tumor suppression and DNA damage response in vivo - PubMed (original) (raw)
The circadian gene Period2 plays an important role in tumor suppression and DNA damage response in vivo
Loning Fu et al. Cell. 2002.
Free article
Erratum in
- Cell 2002 Dec 27;111(7):1055
Abstract
The Period2 gene plays a key role in controlling circadian rhythm in mice. We report here that mice deficient in the mPer2 gene are cancer prone. After gamma radiation, these mice show a marked increase in tumor development and reduced apoptosis in thymocytes. The core circadian genes are induced by gamma radiation in wild-type mice but not in mPer2 mutant mice. Temporal expression of genes involved in cell cycle regulation and tumor suppression, such as Cyclin D1, Cyclin A, Mdm-2, and Gadd45alpha, is deregulated in mPer2 mutant mice. In particular, the transcription of c-myc is controlled directly by circadian regulators and is deregulated in the mPer2 mutant. Our studies suggest that the mPer2 gene functions in tumor suppression by regulating DNA damage-responsive pathways.
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