title: Caffeine treatment prevents rapid eye movement sleep deprivation-induced impairment of late-phase long-term potentiation in the dentate gyrus.
abstract: The CA1 and dentate gyrus (DG) are physically and functionally closely related areas of the hippocampus, but they differ in various respects, including their reactions to different insults. The purpose of this study was to determine the protective effects of chronic caffeine treatment on late-phase long-term potentiation (L-LTP) and its signalling cascade in the DG area of the hippocampus of rapid eye movement sleep-deprived rats. Rats were chronically treated with caffeine (300 mg/L drinking water) for 4 weeks, after which they were sleep-deprived for 24 h. L-LTP was induced in in anaesthetized rats, and extracellular field potentials from the DG area were recorded in vivo. The levels of L-LTP-related signalling proteins were assessed by western blot analysis. Sleep deprivation markedly reduced L-LTP magnitude, and basal levels of total cAMP response element-binding protein (CREB), phosphorylated CREB (P-CREB), and calcium/calmodulin kinase IV (CaMKIV). Chronic caffeine treatment prevented the reductions in the basal levels of P-CREB, total CREB and CaMKIV in sleep-deprived rats. Furthermore, caffeine prevented post-L-LTP sleep deprivation-induced downregulation of P-CREB and brain-derived neurotrophic factor in the DG. The current findings show that caffeine treatment prevents acute sleep deprivation-induced deficits in brain function.
authors.affiliation: Department of Pharmacological and Pharmaceutical Sciences, 521E Science and Research 2 Bldg, College of Pharmacy, University of Houston, Houston, TX 77204-5037, USA.
authors.forename: Ibrahim A
authors.initials: IA
authors.lastname: Alhaider
authors.affiliation: Department of Pharmacological and Pharmaceutical Sciences, 521E Science and Research 2 Bldg, College of Pharmacy, University of Houston, Houston, TX 77204-5037, USA.
authors.forename: Karim A
authors.initials: KA
authors.lastname: Alkadhi
mesh_terms: D000818:Animals; D058256:Brain Waves / Q000187:drug effects; D019208:Brain-Derived Neurotrophic Factor / Q000378:metabolism; D002110:Caffeine / Q000008:administration & dosage*; D054734:Calcium-Calmodulin-Dependent Protein Kinase Type 4 / Q000378:metabolism; D017362:Cyclic AMP Response Element-Binding Protein / Q000378:metabolism; D018891:Dentate Gyrus / Q000187:drug effects* / Q000378:metabolism / Q000503:physiopathology*; D019706:Excitatory Postsynaptic Potentials / Q000187:drug effects; D017774:Long-Term Potentiation / Q000187:drug effects*; D008297:Male; D010766:Phosphorylation; D051381:Rats; D017208:Rats, Wistar; D015398:Signal Transduction / Q000187:drug effects; D012892:Sleep Deprivation / Q000378:metabolism / Q000503:physiopathology*; D012895:Sleep, REM
chemical_list: D019208:Brain-Derived Neurotrophic Factor; D017362:Cyclic AMP Response Element-Binding Protein; D002110:Caffeine; D054734:Calcium-Calmodulin-Dependent Protein Kinase Type 4; C517686:Camk4 protein, rat
keywords: BDNF; CREB; CaMKIV; electrophysiology in vivo