Abstract:
:Neonatal maternal deprivation permanently modifies the hypothalamo-pituitary-adrenal (HPA) axis and other neurobiological and behavioural parameters in rats. The HPA axis plays a central role in the control of feeding, and participates in the anorexigenic action of dexfenfluramine and restraint stress, and in the orexigenic action of a cafeteria diet. Therefore, we investigated whether maternal deprivation modifies feeding responses to these factors. Experimental pups were separated for 24h from the mother 5 or 14 days after birth. The anorexigenic response to both dexfenfluramine and restraint stress was increased, and body weight as well as subcutaneous adipose tissue gain induced by cafeteria diet was higher in early deprived adult rats. However, these effects were dependent on the time of maternal deprivation. According to our predictions, the feeding response of maternally deprived rats to anorexigenic and orexigenic agents was altered, which is probably partly due to an altered HPA function, but the participation of the serotonergic, the opioid and/or the dopaminergic system cannot be ruled out. Additional studies are needed to detail precisely the neurobiological substrates of modified feeding behaviour of maternally deprived animals. This early stress paradigm altering feeding behaviour could become an interesting model for research into human eating disorders.
journal_name
Neuropharmacologyjournal_title
Neuropharmacologyauthors
Penke Z,Fernette B,Nyakas C,Max JP,Burlet Adoi
10.1016/s0028-3908(01)00183-6subject
Has Abstractpub_date
2002-03-01 00:00:00pages
421-7issue
3eissn
0028-3908issn
1873-7064pii
S0028390801001836journal_volume
42pub_type
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