Document Detail

Gender-dependent behavioral and biochemical effects of adolescent delta-9-tetrahydrocannabinol in adult maternally deprived rats.
MedLine Citation:
PMID:  22178986     Owner:  NLM     Status:  Publisher    
Preclinical data support the long-term adverse effects on cognition, emotionality, and psychotic-like behaviors of adolescent exposure to natural and synthetic cannabinoids. To investigate whether the long-lasting adverse effects induced by cannabinoids in adolescence are influenced by early-life stress, female and male rats were subjected to 24-h maternal deprivation at postnatal day (PND) 9 and treated with tetrahydrocannabinol (THC) during adolescence (PND 35-45) according to our previously reported protocol. At adulthood, rats were tested in the novel object recognition, social interaction, and forced swim tests, to evaluate possible alterations in recognition memory, social behavior, and coping strategy. Moreover, CB1 receptor density and functionality, as well as NMDA and dopamine D1 and D2 receptor densities were measured through autoradiographic binding studies. In female maternally deprived rats, THC failed to impair recognition memory, counteracted aggressiveness induced by maternal deprivation, whereas no interaction was observed in the passive coping behavior. In males, the association of the two events increased passing coping response without affecting other behaviors. This behavioral picture was accompanied by gender-dependent and region-specific alterations in NMDA, D1 and D2 receptors. In conclusion, this study demonstrates that adolescent THC exposure might have different behavioral outcomes in animals previously exposed to early-life stress compared with non-stressed controls. The interaction between the two events is not univocal, and different combinations may arise depending on the sex of the animals and the behavior considered. Alterations in NMDA, D1 and D2 receptors might be involved in the behavioral responses induced by maternal deprivation and in their modulation by THC. This article is part of a Special Issue entitled: Stress and Endocannabinoids.
E Zamberletti; P Prini; S Speziali; M Gabaglio; M Solinas; D Parolaro; T Rubino
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-29
Journal Detail:
Title:  Neuroscience     Volume:  -     ISSN:  1873-7544     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-12-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7605074     Medline TA:  Neuroscience     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 IBRO. Published by Elsevier Ltd. All rights reserved.
DBSF and Neuroscience Center, University of Insubria, via A. da Giussano 10, Busto Arsizio, Varese, Italy.
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