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PKCδ inhibition enhances tyrosine hydroxylase phosphorylation in mice after methamphetamine treatment. | LitMetric

AI Article Synopsis

Article Abstract

The present study was designed to evaluate the specific role of protein kinase C (PKC) δ in methamphetamine (MA)-induced dopaminergic toxicity. A multiple-dose administration regimen of MA significantly increases PKCδ expression, while rottlerin, a PKCδ inhibitor, significantly attenuates MA-induced hyperthermia and behavioral deficits. These behavioral effects were not significantly observed in PKCδ antisense oligonucleotide (ASO)-treated- or PKCδ knockout (-/-)-mice. There were no MA-induced significant decreases of dopamine (DA) content or tyrosine hydroxylase (TH) expression in the striatum in rottlerin-treated-, ASO-treated- or PKCδ (-/-)-mice. The administration of MA also results in a significant decrease of TH phosphorylation at ser 40, but not ser 31, while the inhibition of PKCδ consistently and significantly attenuates MA-induced reduction in the phosphorylation of TH at ser 40. Therefore, these results suggest that the MA-induced enhancement of PKCδ expression is a critical factor in the impairment of TH phosphorylation at ser 40 and that pharmacological or genetic inhibition of PKCδ may be protective against MA-induced dopaminergic neurotoxicity in vivo.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3959171PMC
http://dx.doi.org/10.1016/j.neuint.2011.03.022DOI Listing

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