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• W2017753442 abstract "We have previously shown that activation of nicotinic acetylcholine receptors (nAChRs) enhanced long-term potentiation (LTP) in the rat dentate gyrus in vitro via activation of alpha7 nAChR. In the present studies, mechanisms underlying the acute and chronic nicotinic enhancement of LTP were examined. In particular, the involvement of activation of intracellular kinases was examined using selective kinase antagonists, and the effects of enhancing cholinergic function with positive allosteric modulators of the alpha7 nAChR and with acetylcholinesterase (AChE) inhibitors were also investigated. Activation of extracellular signal-regulated kinase (ERK) and cAMP-dependent protein kinase (PKA) was found to be involved in the induction of the acute nicotinic enhancement of LTP, although not control LTP. In contrast, activation of the tyrosine kinase Src, Ca(2+)-calmodulin-dependent protein kinase II, Janus kinase 2 and p38 mitogen-activated protein kinase was not involved in the acute nicotinic enhancement of LTP, although Src activation was necessary for control LTP. Moreover, activation of phosphoinositide 3-kinase was involved in the acute nicotinic enhancement of LTP to a much lesser extent than in control LTP. Chronic nicotine enhancement of LTP was found to be dependent on PKA, ERK and Src kinases. Acute nicotinic enhancement of LTP was occluded by chronic nicotine treatment. The positive allosteric modulator PNU-120596 was found to strongly reduce the threshold for nicotinic enhancement of LTP, an affect mediated via the alpha7 nAChR as it was blocked by the selective antagonist methyllycaconitine. The AChE inhibitors tacrine and physostigmine enhanced control LTP." @default.
• W2017753442 created "2016-06-24" @default.
• W2017753442 creator A5002624924 @default.
• W2017753442 creator A5016626306 @default.
• W2017753442 creator A5067532394 @default.
• W2017753442 date "2008-12-22" @default.
• W2017753442 modified "2023-10-10" @default.
• W2017753442 title "Intracellular mechanisms underlying the nicotinic enhancement of LTP in the rat dentate gyrus" @default.
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• W2017753442 doi "https://doi.org/10.1111/j.1460-9568.2008.06562.x" @default.
• W2017753442 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19077124" @default.
• W2017753442 hasPublicationYear "2008" @default.
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