The effect of maternal forced exercise on offspring pain perception, motor activity and anxiety disorder: the role of 5-HT2 and D2 receptors and CREB gene expression
The effect of maternal forced exercise on central disorders in offsprings has been shown but the mechanism is still unclear. In this study, the role of 5-HT2 and D2 receptors in neuroprotective effects of maternal forced exercise on offspring neurodevelopment and neurobehavioral symptoms is evaluated. Sixty pregnant rats were trained by forced ex-ercise and some behavioral and molecular aspects in their offspring were evaluated in presence of 5-HT2 and D2 receptors agonists and an-tagonists. The results showed that maternal forced exercise causes in-crease of pain tolerability and increase latency of pain perception in offspring in hot plate test, writhing test and tail flick test. Also maternal forced exercise causes decrease of depression and anxiety like behav-ior in offsprings. On the other hand, treatment of mothers by forced ex-ercise in combination with 5-HT2 and D2 receptor antagonists inhibited the protective effects of forced exercise and cause disturbance in pain perception and tolerability and increase depression and anxiety in off-springs. Also expression of cyclic AMP response element binding pro-tein (CREB) was changed in all experimental groups. In conclusion, our data suggested that maternal forced exercise causes neurobehavioral protective effect on offsprings and this effect might probably be mediat-ed by 5-HT2 and D2 receptors and activation of CREB gene expression.
목차
Abstract INTRODUCTION MATERIALS AND METHODS Animal Drug Experimental design of pregnant rats Treadmill forced exercise protocol Behavioral and molecular assays in offspring Writhing test Tail flick test Hot plate test Open field test Quantitative real-time reverse transcription-polymerase chain reaction studies Hematoxylin and eosin staining Neuropathological examination Statistical analysis RESULTS The effect of maternal exercise and the role of D2 and 5-HT2 receptors on offsprings’ pain response in WT The effect of maternal forced exercise and the role of D2 and 5-HT2 receptors on offsprings’ pain response in TFT The effect of maternal exercise and the role of D2 and 5-HT2 receptors on offsprings’ pain response in HPT The effect of maternal exercise and the role of D2 and 5-HT2 receptors on offsprings’ OFT behavior assay The effect of maternal exercise and the role of D2 and 5-HT2 receptors on offsprings’ anxiety like behavior in EPM The alteration in CREB gene expression in offsprings The alteration in cell density and morphology of DG in offsprings The correlation between hippocampal CREB expression and gentate gyrus cell density DISCUSSION CONFLICT OF INTEREST REFERENCES
Ozra Motaghinejad [ Razi Drug Research Center and Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran ]
Majid Motaghinejad [ Razi Drug Research Center and Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran ]
Corresponding author
Manijeh Motevalian [ Razi Drug Research Center and Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran ]
Fatemeh Rahimi-Sharbaf [ Department of Gynecology, Tehran University of Medical Sciences, Tehran, Iran ]
Tabassom Beiranvand [ Razi Drug Research Center and Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran ]