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dc.contributor.authorSzeifoul Afadlalen_US
dc.contributor.authorNongnuch Polaboonen_US
dc.contributor.authorPornprom Surakulen_US
dc.contributor.authorPiyarat Govitrapongen_US
dc.contributor.authorNuanchan Jutapakdeegulen_US
dc.contributor.otherMahidol Universityen_US
dc.contributor.otherChristian Universityen_US
dc.identifier.citationNeuroscience Letters. Vol.470, No.1 (2010), 24-27en_US
dc.description.abstractExposure to stress during critical periods of an organism's maturation can result in permanent behavioral changes and induced hyper-responsive to aversive stimuli as adult. Hippocampus is a plastic and vulnerable brain structure that is susceptible to damage during aging and repeated stress. The present study examines the effect of maternal restraint stress on the level of GAP-43, pGAP-43 and synaptophysin in the hippocampus of rat pups. Prenatal stress (PS) causes a significant increase of GAP-43 and pGAP-43 (p ≤ 0.001) in the pup's hippocampus during postnatal days 7 and 14, but not at later ages. Up-regulation of GAP-43 and pGAP-43 may alter the pattern of axonal growth and synapses' formation in the pup's brain since the first two postnatal weeks are correlated with peak period of synaptogenesis in the rat brain. We also examined the level of synaptophysin, a synaptic vesicle membrane protein, in the pup's brain. Our finding revealed that, PS causes a significant decrease of synaptophysin in the pup's hippocampus as compared to control (p ≤ 0.001). These changes are due to the direct effects of maternal stress hormone since repeated injection with corticosterone (CORT, 40 mg/kg) to pregnant rat during gestation days (GDs) 14-21 also gave the same results. Abnormal axonal sprouting and reorganization together with the alterations in synaptic vesicle membrane protein during the critical period of synaptogenesis may lead to a defect in synapse formation and axonal pruning in the hippocampus. These changes may be associated with stress-induced impairment of hippocampal function that occurs in later life of the offspring. © 2010 Elsevier Ireland Ltd. All rights reserved.en_US
dc.rightsMahidol Universityen_US
dc.titlePrenatal stress alters presynaptic marker proteins in the hippocampus of rat pupsen_US
Appears in Collections:Scopus 2006-2010

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