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A new role for clathrin adaptor proteins 1 and 3 in lipoplex trafficking

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Alford, Justine E., Gumbs, Jade and Anderson, Emma C. (2014) A new role for clathrin adaptor proteins 1 and 3 in lipoplex trafficking. PLoS ONE, Volume 9 (Number 3). Article number e91429. doi:10.1371/journal.pone.0091429 ISSN 1932-6203.

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Official URL: http://dx.doi.org/10.1371/journal.pone.0091429

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Abstract

Intracellular protein trafficking through secretory and endocytic pathways depends on the function of adaptor proteins that bind motifs on cargo proteins. The adaptor proteins then recruit coat proteins such as clathrin, enabling the formation of a transport vesicle. While studying the role of the clathrin adaptor proteins, AP-1, AP-2 and AP-3 in viral protein trafficking, we discovered that AP-1 and AP-3 potentially have a role in successful transfection of mammalian cells with DNA-liposome complexes (lipoplexes). We showed that AP-1, -2 and -3 are not required for lipoplexes to enter cells, but that lipoplexes and/or released DNA are unable to reach the nucleus in the absence of AP-1 or AP-3, leading to minimal exogenous gene expression. In contrast, gene expression from liposome-delivered mRNA, which does not require nuclear entry, was not impaired by the absence of AP-1 or AP-3. Despite the use of lipoplexes to mediate gene delivery being so widely used in cell biology and, more recently, gene therapy, the mechanism by which lipoplexes or DNA reach the nucleus is poorly characterised. This work sheds light on the components involved in this process, and demonstrates a novel role for AP-1 and AP-3 in trafficking lipoplexes.

Item Type: Journal Article
Subjects: Q Science > QP Physiology
Divisions: Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- )
Library of Congress Subject Headings (LCSH): Carrier proteins
Journal or Publication Title: PLoS ONE
Publisher: Public Library of Science
ISSN: 1932-6203
Official Date: 11 March 2014
Dates:
DateEvent
11 March 2014Published
11 February 2014Accepted
11 November 2013Submitted
Volume: Volume 9
Number: Number 3
Article Number: Article number e91429
DOI: 10.1371/journal.pone.0091429
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 26 December 2015
Date of first compliant Open Access: 26 December 2015
Funder: Medical Research Council (Great Britain) (MRC)
Grant number: G0701220 (MRC)

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