title: Caffeine prevents sleep loss-induced deficits in long-term potentiation and related signaling molecules in the dentate gyrus.
abstract: We have previously reported that caffeine prevented sleep deprivation-induced impairment of long-term potentiation (LTP) of area CA1 as well as hippocampus-dependent learning and memory performance in the radial arm water maze. In this report we examined the impact of long-term (4-week) caffeine consumption (0.3 g/L in drinking water) on synaptic plasticity (Alhaider et al., 2010) deficit in the dentate gyrus (DG) area of acutely sleep-deprived rats. The sleep deprivation and caffeine/sleep deprivation groups were sleep-deprived for 24 h by using the columns-in-water technique. We tested the effect of caffeine and/or sleep deprivation on LTP and measured the basal levels as well as stimulated levels of LTP-related molecules in the DG. The results showed that chronic caffeine administration prevented the impairment of early-phase LTP (E-LTP) in the DG of sleep-deprived rats. Additionally, chronic caffeine treatment prevented the sleep deprivation-associated decreases in the basal levels of the phosphorylated calcium/calmodulin-dependent protein kinase II (P-CaMKII) and brain derived neurotrophic factor (BDNF) as well as in the stimulated levels of P-CaMKII in the DG area. The results suggest that chronic use of caffeine prevented anomalous changes in the basal levels of P-CaMKII and BDNF associated with sleep deprivation and as a result contributes to the revival of LTP in the DG region.
authors.affiliation: Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX, USA.
authors.forename: Ibrahim A
authors.initials: IA
authors.lastname: Alhaider
authors.forename: Abdulaziz M
authors.initials: AM
authors.lastname: Aleisa
authors.forename: Trinh T
authors.initials: TT
authors.lastname: Tran
authors.forename: Karim A
authors.initials: KA
authors.lastname: Alkadhi
mesh_terms: D000284:Administration, Oral; D000818:Animals; D019208:Brain-Derived Neurotrophic Factor / Q000378:metabolism; D002110:Caffeine / Q000008:administration & dosage / Q000494:pharmacology*; D054732:Calcium-Calmodulin-Dependent Protein Kinase Type 2 / Q000378:metabolism; D000697:Central Nervous System Stimulants / Q000008:administration & dosage / Q000494:pharmacology*; D018891:Dentate Gyrus / Q000187:drug effects* / Q000503:physiopathology; D066298:In Vitro Techniques; D017774:Long-Term Potentiation / Q000187:drug effects*; D008297:Male; D010766:Phosphorylation; D011897:Random Allocation; D051381:Rats; D017208:Rats, Wistar; D012892:Sleep Deprivation / Q000188:drug therapy* / Q000503:physiopathology; D013569:Synapses / Q000187:drug effects / Q000502:physiology; D013997:Time Factors
chemical_list: D019208:Brain-Derived Neurotrophic Factor; D000697:Central Nervous System Stimulants; D002110:Caffeine; D054732:Calcium-Calmodulin-Dependent Protein Kinase Type 2