Journal article

NONO couples the circadian clock to the cell cycle

  • Kowalska, Elzbieta Institute of Pharmacology and Toxicology, University of Zurich, Switzerland
  • Ripperger, Jürgen A. Division of Biochemistry, Department of Medicine, University of Fribourg, Switzerland
  • Hoegger, Dominik C. Division of Plastic and Reconstructive Surgery, Department of Surgery, University Hospital Zurich, Switzerland
  • Bruegger, Pascal Institute of Pharmacology and Toxicology, University of Zurich, Switzerland
  • Buch, Thorsten Institute of Experimental Immunology, University of Zurich, Switzerland
  • Birchler, Thomas Institute of Experimental Immunology, University of Zurich, Switzerland
  • Mueller, Anke Laboratory of Chronobiology, Institute of Medical Immunology, Charité Universitätsmedizin, Berlin, Germany
  • Albrecht, Urs Division of Biochemistry, Department of Medicine, University of Fribourg, Switzerland
  • Contaldo, Claudio Division of Plastic and Reconstructive Surgery, Department of Surgery, University Hospital Zurich, Switzerland
  • Brown, Steven A. Institute of Pharmacology and Toxicology, University of Zurich, Switzerland
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    24.12.2012
Published in:
  • Proceedings of the National Academy of Sciences. - 2013, vol. 110, no. 5, p. 1592-1599
English Mammalian circadian clocks restrict cell proliferation to defined time windows, but the mechanism and consequences of this interrelationship are not fully understood. Previously we identified the multifunctional nuclear protein NONO as a partner of circadian PERIOD (PER) proteins. Here we show that it also conveys circadian gating to the cell cycle, a connection surprisingly important for wound healing in mice. Specifically, although fibroblasts from NONO-deficient mice showed approximately normal circadian cycles, they displayed elevated cell doubling and lower cellular senescence. At a molecular level, NONO bound to the p16-Ink4A cell cycle checkpoint gene and potentiated its circadian activation in a PER protein-dependent fashion. Loss of either NONO or PER abolished this activation and circadian expression of p16-Ink4A and eliminated circadian cell cycle gating. In vivo, lack of NONO resulted in defective wound repair. Because wound healing defects were also seen in multiple circadian clock-deficient mouse lines, our results therefore suggest that coupling of the cell cycle to the circadian clock via NONO may be useful to segregate in temporal fashion cell proliferation from tissue organization.
Faculty
Faculté des sciences et de médecine
Department
Département de Biologie
Language
  • English
Classification
Biology
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/302797
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