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Neuroscience Letters
Article . 2009 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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DIGITAL.CSIC
Article . 2011 . Peer-reviewed
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Rab 11 regulates constitutive dopamine transporter trafficking and function in N2A neuroblastoma cells

Authors: Furmana, Cheryse A.; Lo, Charles B.; Stokes, Stephanie; Esteban, José A.; Gnegy, Margaret E.;

Rab 11 regulates constitutive dopamine transporter trafficking and function in N2A neuroblastoma cells

Abstract

The dopamine transporter (DAT) is a crucial regulator of dopaminergic neurotransmission which undergoes constitutive and substrate-mediated trafficking to and from the membrane. Although, considerable research has been done to elucidate the regulation of substrate-stimulated DAT trafficking, less is known about which trafficking proteins are involved in constitutive DAT trafficking. Rab proteins are GTPases known to regulate the trafficking of proteins to and from specific endocytic compartments. Rabs 8 and 11, in particular, are involved in trafficking proteins from intracellular compartments to the plasma membrane. In this study, we sought to determine whether Rabs 8 and 11 would modulate DAT activity and trafficking in N2A neuroblastoma cells. We used Rab mutations known to confer constitutively active or dominant negative activity of these proteins to investigate the role of Rab activity in constitutive DAT trafficking and function. We found that constitutively active Rab 11 upregulates DAT function and surface expression while neither the constitutively active nor the dominant negative mutant of Rab 8 had any effect on DA uptake. Furthermore, immunofluorescence experiments revealed that dominant negative Rab 11 overexpression results in decreased surface DAT indicating a necessary function of Rab 11 in DAT trafficking to the plasma membrane. These data show for the first time a functional role of Rab proteins in the constitutive recycling of DAT to the plasma membrane.

Country
Spain
Keywords

Dopamine Plasma Membrane Transport Proteins, Trafficking, Recombinant Fusion Proteins, Cell Membrane, Green Fluorescent Proteins, Transfection, Rab, Dopamine transporter [DAT], Rats, DAT: Dopamine transporter, Mice, Protein Transport, rab GTP-Binding Proteins, Cell Line, Tumor, Mutation, Animals, Humans, rab11 GTP-Binding Proteins

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
views
OpenAIRE UsageCountsViews provided by UsageCounts
21
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Average
Top 10%
22
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