title: Effects of swimming exercise on morphine-induced reward and behavioral sensitization in maternally-separated rat pups in the conditioned place preference procedure.
abstract: This study was designed to examine the effects of swimming exercise during adolescence on morphine-induced conditioned place preference (CPP) and behavioral sensitization in maternally separated male and female rat pups. Male Wistar rats were allowed to mate with female virgin Wistar rats. Pups were separated from the dam daily for 180min during postnatal days 2-14. All pups were weaned on day 21.The exercising pups were allowed to swim (60min/d, five days per a week, for 30days) during adolescence. Then, rat pups were tested for behavioral sensitization and the CPP induced by morphine. Maternal separation produced a significant increase in morphine-induced CPP in both sexes, behavioral sensitization in male pups and tolerance to morphine-induced motor activity in female pups. Swimmer pups separated from the dam exhibited a decrease in morphine-induced CPP in both sexes and behavioral sensitization in male pups than those of their control pups. The present results have shown that swimming exercise during adolescence may exert a protective effect against morphine-induced reward and behavioral sensitization in adult male and female rats following maternal separation.
authors: Faculty of Psychology and Educational Sciences, University of Semnan, Semnan, Iran.
authors: Atiyeh Taghavi-Khalil
authors: AT
authors: Abad
authors: Laboratory of Animal Addiction Models, Research Center and Department of Physiology, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran. Electronic address: Miladi331@yahoo.com.
authors: Hossein
authors: H
authors: Miladi-Gorji
authors: Faculty of Educational Sciences and Psychology, Ferdowsi University of Mashhad, Mashhad, Iran.
authors: Imanollah
authors: I
authors: Bigdeli
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects; D003214:Conditioning, Classical / Q000187:drug effects*; D005260:Female; D008297:Male; D008426:Maternal Deprivation; D009020:Morphine / Q000008:administration & dosage*; D051381:Rats; D017208:Rats, Wistar; D012201:Reward; D013550:Swimming
chemical_list: D009020:Morphine
keywords: Behavioral sensitization; Conditioned place preference; Maternal separation; Morphine; Swimming exercise