期刊
PROGRESS IN NEURO-PSYCHOPHARMACOLOGY & BIOLOGICAL PSYCHIATRY
卷 28, 期 4, 页码 687-692出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.pnpbp.2004.05.005
关键词
obsessive-compulsive disorder; 8-OH-DPAT; ontogeny of spontaneous alternation; persistence in a T-maze; sex differences
Sex differences in the prevalence of obsessive-compulsive disorder (OCD) in prepubertal children have been described. Deficits on spontaneous alternation behavior (SAB) have been proposed as an animal model of OCD. Objectives: To explore possible sex differences in the ontogeny of SAB and in the effect of the 5-HT1A agonist, 8-OH-hydroxy-2 (di-n-propylamino)-tetralin (8-OH-DPAT) in an animal model of OCD. Methods: The ontogeny of SAB and the perseveration produced by 8-OH-DPAT were compared between male and female prepubertal rats. Results: Males alternated their arm choose from postnatal day 32 onwards, while females perseverated in the chosen arm until postnatal day 38. The mean number of repetitive choices remained close to 1 in males from postnatal day 23 onwards, but females showed a mean number of repetitive choices higher than 1.5 until the end of the test. The 8-OH-DPAT (0.125, 0.5 and 2.0 mg/kg, 15 min) produced perseveration in males but not in females. Conclusions: These data show important sex differences in the ontogeny of SAB and the effect of 8-OH-DPAT in a model of OCD. Such differences could be relevant for the sex differences in the prevalence of childhood OCD. (C) 2004 Elsevier Inc. All rights reserved.
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