Université de Fribourg

Rev‐erbα modulates the hypothalamic orexinergic system to influence pleasurable feeding behaviour in mice

Feillet, Céline A. ; Bainier, Claire ; Mateo, Maria ; Blancas-Velázquez, Aurea ; Salaberry, Nora L. ; Ripperger, Jürgen A. ; Albrecht, Urs ; Mendoza, Jorge

In: Addiction Biology, 2017, vol. 22, no. 2, p. 411–422

The drive to eat is regulated by two compensatory brain pathways termed as homeostatic and hedonic. Hypothalamic orexinergic (ORX) neurons regulate metabolism, feeding and reward, thus controlling physiological and hedonic appetite. Circadian regulation of feeding, metabolism and rhythmic activity of ORX cells are driven by the brain suprachiasmatic clock. How the circadian clock impacts on...

Université de Fribourg

Behavioural food-anticipation in clock genes deficient mice: confirming old phenotypes, describing new phenotypes

Mendoza, Jorge ; Albrecht, Urs ; Challet, Etienne

In: Genes, Brain and Behavior, 2010, vol. 9, p. -

Animals fed daily at the same time exhibit circadian food-anticipatory activity (FAA), which has been suggested to be driven by one or several food-entrainable oscillators (FEOs). FAA is altered in mice lacking some circadian genes essential for timekeeping in the main suprachiasmatic clock (SCN). Here we confirmed that single mutations of clock genes Per1−/− and...

Université de Fribourg

Forebrain oscillators ticking with different clock hands

Feillet, Céline A. ; Mendoza, Jorge ; Albrecht, Urs ; Pévet, Paul ; Challet, Etienne

In: Molecular and Cellular Neuroscience, 2008, vol. 37, no. 2, p. 209-221

Clock proteins like PER1 and PER2 are expressed in the brain, but little is known about their functionality outside the main suprachiasmatic clock. Here we show that PER1 and PER2 were neither uniformly present nor identically phased in forebrain structures of mice fed ad libitum. Altered expression of the clock gene Cry1 was observed in respective Per1 or Per2 mutants. In response to hypocaloric...