Motor activity rhythms of forced desynchronized rats subjected to restricted feeding

Anglès-Pujolràs, Montserrat; Chiesa, Juan José; Dı́ez-Noguera, Antoni; Cambras, Trinitat

doi:10.1016/j.physbeh.2006.03.004

Cited by 6 publications

(5 citation statements)

References 29 publications

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“…), nor on its entrainment to desynchronizing 22‐h light–dark cycles in rats (Angles‐Pujolras et al. ), it can entrain several peripheral clocks related to feeding and nutrient processing (Schibler et al. ).…”

Section: Discussionmentioning

confidence: 99%

Effects of chronic forced circadian desynchronization on body weight and metabolism in male mice

et al. 2016

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Metabolic functions are synchronized by the circadian clock setting daily patterns of food intake, nutrient delivery, and behavioral activity. Here, we study the impact of chronic jet‐lag (CJL) on metabolism, and test manipulations aimed to overcome potential alterations. We recorded weight gain in C57Bl/6 mice under chronic 6 h advances or delays of the light–dark cycle every 2 days (ChrA and ChrD, respectively). We have previously reported ChrA, but not ChrD, to induce forced desynchronization of locomotor activity rhythms in mice (Casiraghi et al. 2012). Body weight was rapidly increased under ChrA, with animals tripling the mean weight gain observed in controls by day 10, and doubling it by day 30 (6% vs. 2%, and 15% vs. 7%, respectively). Significant increases in retroperitoneal and epidydimal adipose tissue masses (172% and 61%, respectively), adipocytes size (28%), and circulating triglycerides (39%) were also detected. Daily patterns of food and water intake were abolished under ChrA. In contrast, ChrD had no effect on body weight. Wheel‐running, housing of animals in groups, and restriction of food availability to hours of darkness prevented abnormal increase in body weight under ChrA. Our findings suggest that the observed alterations under ChrA may arise either from a direct effect of circadian disruption on metabolism, from desynchronization between feeding and metabolic rhythms, or both. Direction of shifts, timing of feeding episodes, and other reinforcing signals deeply affect the outcome of metabolic function under CJL. Such features should be taken into account in further studies of shift working schedules in humans.

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Section: Discussionmentioning

confidence: 99%

Effects of chronic forced circadian desynchronization on body weight and metabolism in male mice

et al. 2016

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“…In the absence of other zeitgebers, for instance under constant lighting conditions, restricted feeding may entrain the daily rhythm driven by SCN (Anglès‐Pujolras et al. 2006).…”

Section: Discussionmentioning

confidence: 99%

“…Nonphotic stimuli such as increased total locomotor activity, restricted feeding, social cues, and exposure to novelty can phase shift and/or entrain the daily pacemaker of mammals. One of the nonphotic stimuli that can affect the organization of activity, independently of the L/D cycle, is the restricted access to food (Anglès‐Pujolràs et al. 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Some environmental stimuli are capable of synchronizing daily oscillators without acting through the SCN (Mistlberger & Rusak 1987 activity, restricted feeding, social cues, and exposure to novelty can phase shift and/or entrain the daily pacemaker of mammals. One of the nonphotic stimuli that can affect the organization of activity, independently of the L/D cycle, is the restricted access to food (Anglès-Pujolràs et al 2006). In numerous mammalian species, food availability for only a limited time each day is also a zeitgeber signal for a number of behaviors and physiological functions (Stephan 2002).…”

Section: Introductionmentioning

confidence: 99%

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Photic and non‐photic entrainment on daily rhythm of locomotor activity in goats

Giannetto

Casella

Caola

et al. 2010

Animal Science Journal

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We studied the photic (L/D cycle) and non-photic (restricted feeding) entrainment on the patterns of daily rhythm of total locomotor activity in goats. Six female Maltese goats were subjected to three different artificial L/D cycles: 12/12 L/D, 12/12 D/L and constant light. During the 12/12 L/D and 12/12 D/L, food and water were available ad libitum. During constant light, animals were subjected to a restricted feeding treatment. Total activity was recorded by means of an actigraphy-based data logger (Actiwatch-Mini). Our results showed that goats exhibited clear daily rhythms of activity in 12/12 L/D cycle, 12/12 D/L cycle and constant light, although they showed FAA prior the feeding time during the restricted feeding treatment. Goats were diurnal, with activity consistently beginning promptly following the onset of light. Even when the L/D cycle was delayed by 12 h on some days, to the daily rhythm was re-established. During the constant light period, the onset of activity was linked to the time of food administration. Our study evidences two factors for the rhythm of total locomotor activity in goats: light stimuli (photic) and food access (non photic), strongly coupled to permit organisms the adaptive temporal coordination of behaviour with stable and unstable environmental periodicities.

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“…Although the FEC system can function in the absence of the SCN, the SCN may be required to maintain the amplitude of meal-entrained rhythms and may control the period and phase of FEC as long as food availability is unrestricted. It is suggested that the coupling between the FEC and the light-entrainable pacemaker (LEP) on the SCN is asymmetrical, as FEC is usually coupled to LEP but has a weak effect on it (Anglès-Pujolràs et al, 2006). Food availability may affect the circadian organization of daily rhythms.…”

Section: Introductionmentioning

confidence: 99%

Influence of time of food administration on daily rhythm of total locomotor activity in ponies

Piccione

Giannetto

Marafioti

et al. 2013

Journal of Veterinary Behavior

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Motor activity rhythms of forced desynchronized rats subjected to restricted feeding

Cited by 6 publications

References 29 publications

Effects of chronic forced circadian desynchronization on body weight and metabolism in male mice

Effects of chronic forced circadian desynchronization on body weight and metabolism in male mice

Photic and non‐photic entrainment on daily rhythm of locomotor activity in goats

Influence of time of food administration on daily rhythm of total locomotor activity in ponies

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