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    Université de Fribourg

    Normalisation against circadian and age-related disturbances enables robust detection of gene expression changes in liver of aged mice

    Costa, Sara S. Fonseca ; Wegmann, Daniel ; Ripperger, Jürgen A.

    In: PLOS ONE, 2017, vol. 12, no. 1, p. e0169615

    The expression of some genes is affected by age. To detect such age-related changes, their expression levels are related to constant marker genes. However, transcriptional noise increasing with advancing age renders difficult the identification of real age-related changes because it may affect the marker genes as well. Here, we report a selection procedure for genes appropriate to normalise...

    Université de Fribourg

    REV-ERBα influences the stability and nuclear localization of the glucocorticoid receptor

    Okabe, Takashi ; Chavan, Rohit ; Costa, Sara S. Fonseca ; Brenna, Andrea ; Ripperger, Jürgen A. ; Albrecht, Urs

    In: Journal of Cell Science, 2016, vol. 129, no. 21, p. 4143–4154

    REV-ERBα (encoded by Nr1d1) is a nuclear receptor that is part of the circadian clock mechanism and regulates metabolism and inflammatory processes. The glucocorticoid receptor (GR, encoded by Nr3c1) influences similar processes, but is not part of the circadian clock, although glucocorticoid signaling affects resetting of the circadian clock in peripheral tissues. Because of their similar...

    Université de Fribourg

    Liver-derived ketone bodies are necessary for food anticipation

    Chavan, Rohit ; Feillet, Céline ; Costa, Sara S. Fonseca ; Delorme, James E. ; Okabe, Takashi ; Ripperger, Jürgen A. ; Albrecht, Urs

    In: Nature Communications, 2016, vol. 7, p. 10580

    The circadian system has endowed animals with the ability to anticipate recurring food availability at particular times of day. As daily food anticipation (FA) is independent of the suprachiasmatic nuclei, the central pacemaker of the circadian system, questions arise of where FA signals originate and what role components of the circadian clock might play. Here we show that liver-specific...