Abstract:
:Perinatal manipulations can lead to neurobehavioural changes in the progeny. In this study we investigated, in adolescent male rat offspring, the consequences of a single, intense prenatal stress induced by a 120 min-maternal immobilization at gestational day 16, and of a daily, brief maternal separation from postnatal day 2 until 21, on: unconditioned fear/anxiety-like behaviour in open field and in elevated plus-maze; learning performance in the "Can test", a non-aversive spatial and tactile/visual task; corticosterone plasma levels under basal and stress-induced conditions. Our results indicate that both prenatal stress and maternal separation procedures decrease emotionality and enhance learning performance. Maternal separation potentiates prenatal stress-induced effects in enhancing learning performance. Both basal and stress-induced corticosterone plasma levels are reduced following prenatal stress, maternal separation and the combination of two procedures. These findings suggest that a single, intense prenatal stress can enhance the adaptive stress-related responses in the progeny, probably due to the involvement of maternal factors. The synergistic effect of prenatal stress and maternal separation on learning performance may be due to a further damping of hypothalamic-pituitary-adrenal axis response in the progeny that better cope with the task administered.
journal_name
Behav Brain Resjournal_title
Behavioural brain researchauthors
Cannizzaro C,Plescia F,Martire M,Gagliano M,Cannizzaro G,Mantia G,Cannizzaro Edoi
10.1016/j.bbr.2005.12.010subject
Has Abstractpub_date
2006-04-25 00:00:00pages
128-36issue
1eissn
0166-4328issn
1872-7549pii
S0166-4328(06)00004-0journal_volume
169pub_type
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