Protein Kinase C Deficiency-induced Alcohol Insensitivity and Underlying Cellular Targets in Drosophila

Overview

Journal Neuroscience

Specialty Neurology

Date 2009 Dec 17

PMID 20006676

Citations 9

Authors

J Chen

Y Zhang

P Shen

Affiliations

Soon will be listed here.

Abstract

Multiple subtypes of protein kinase C (PKC) isozymes are implicated in various neurological disorders including alcohol insensitivity, a trait strongly associated with alcoholism in humans, but molecular and cellular mechanisms underlying the PKC activities remain poorly understood. Here we show that functional knockdown of conventional, novel or atypical PKC in the fly nervous system each resulted in alcohol insensitivity. Neuroanatomical mapping of conventional Ca(2+)-sensitive PKC53E activity uncovers a previously uncharacterized role of Drosophila serotonin neurons in alcohol sensitivity. The deficiency of PKC53E but not novel Ca(2+)-independent PKC98E appears to reduce synaptic serotonin levels, since acute inhibition of serotonin reuptake by citalopram and Prozac reversed alcohol insensitivity in flies expressing PKC53E double-stranded RNA in serotonin neurons. Together, findings from this and our previous studies indicate that PKC53E and PKC98E differentially regulate fly alcohol sensitivity through independent modulation of conserved serotonin and neuropeptide Y-like systems.

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