Akt-dependent and isoform-specific regulation of dopamine transporter cell surface expression.

Abstract:

:Dopamine (DA) is a neurotransmitter implicated in multiple functions, including movement, cognition, motivation, and reward. The DA transporter (DAT) is responsible for clearing extracellular DA, thereby terminating DA neurotransmission. Previously, it has been shown that insulin signaling through protein kinase B/Akt regulates DAT function by fine-tuning DAT cell surface expression. Importantly, specific Akt isoforms (e.g., Akt1, Akt2) serve distinct physiological functions. Here, we demonstrate using isoform-specific Akt inhibitors that basal activity of Akt2, rather than Akt1, regulates DAT cell surface expression. Since Akt2 activation is mediated by insulin, these data further implicate insulin signaling as an important modulator of DAT function and dopaminergic tone.

journal_name

ACS Chem Neurosci

authors

Speed NK,Matthies HJ,Kennedy JP,Vaughan RA,Javitch JA,Russo SJ,Lindsley CW,Niswender K,Galli A

doi

10.1021/cn100031t

subject

Has Abstract

pub_date

2010-07-21 00:00:00

pages

476-81

issue

7

issn

1948-7193

journal_volume

1

pub_type

信件
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