Nature's food anticipatory experiment: entrainment of locomotor behavior, suprachiasmatic and dorsomedial hypothalamic nuclei by suckling in rabbit pups.

The European Journal of Neuroscience
Mario CabaClaudia Juárez

Abstract

In nature and under laboratory conditions, dams nurse rabbit pups once daily for a duration of fewer than 5 min. The present study explored neural mechanisms mediating the timing of nursing in this natural model of food anticipatory activity, focussing on the suprachiasmatic nucleus (SCN), the locus of the master circadian clock and on the dorsomedial hypothalamic nucleus (DMH), a region implicated in timing of food-entrained behavior. Rabbit pups are born in the dark, with eyelids closed. Nursing visits to the litters also occurs during the dark phase. To explore the effect of the timing of feeding, pups were maintained in constant darkness, while females housed in a light-dark cycle were permitted to nurse their pups either during the night (night-fed group) or day (day-fed group). All pups exhibited anticipatory locomotor activity before daily nursing. In the SCN, PER1 and FOS peaked during the night in both groups, with a longer duration of elevated protein expression in the night-fed group. In contrast, DMH peak PER1 expression occurred 8 h after pups were fed, corresponding to the shift in timing of nursing. Comparison of nursed and 48 h fasted pups indicates that the timing of PER1 expression was similar in the SCN and D...Continue Reading

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Citations

May 26, 2015·Frontiers in Systems Neuroscience·Joseph L Bedont, Seth Blackshaw
Sep 14, 2016·Behavioural Brain Research·Diana OlivoAleph A Corona-Morales
Apr 6, 2017·The European Journal of Neuroscience·J AguirreM Caba
Feb 15, 2018·Journal of Anatomy·Nanette Y SchneiderGérard Coureaud
Nov 9, 2018·The European Journal of Neuroscience·Raúl Aguilar-Roblero, Gabriela González-Mariscal
Mar 27, 2019·Journal of Neuroendocrinology·Mario CabaEnrique Meza
Oct 30, 2009·The European Journal of Neuroscience·Mario Caba, Gabriela González-Mariscal
Apr 5, 2012·The European Journal of Neuroscience·Claudia JuárezMario Caba
Mar 13, 2010·The Journal of Maternal-fetal & Neonatal Medicine : the Official Journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians·An Chen
Jun 9, 2018·Frontiers in Endocrinology·Mario Caba, Jorge Mendoza
Nov 1, 2011·The European Journal of Neuroscience·Linda A W VerhagenTom A P Roeling
Jul 12, 2017·Biology of Sex Differences·Kasiphak KaikaewAldo Grefhorst
Feb 23, 2020·Frontiers in Neuroscience·Mario CabaMaría J Rovirosa-Hernández
Apr 6, 2021·Frontiers in Neuroscience·Mario CabaMario Daniel Caba-Flores

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