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Scribble controls NGF-mediated neurite outgrowth in PC12 cells
Södertörn University, Huddinge, Sweden; Dalhousie University, Halifax, Canada.
Södertörn University, Huddinge, Sweden.
Södertörn University, Huddinge, Sweden.
Örebro University, School of Health and Medical Sciences, Örebro University, Sweden.
2013 (English)In: European Journal of Cell Biology, ISSN 0171-9335, E-ISSN 1618-1298, Vol. 92, no 6-7, p. 213-221Article in journal (Refereed) Published
Abstract [en]

Neurite outgrowth is mediated by dynamic changes of the cytoskeleton and is largely controlled by Rho GTPases and their regulators. Here, we show that the polarity protein Scribble controls PC12 cell neurite outgrowth in response to nerve growth factor. Scribble knockdown decreases neurite numbers and increases neurite length. This effect is linked to TrkA the cognate receptor for NGF as pharmacological inhibition of phosphorylated TrkA (pTrkA) reduces Scribble expression. Moreover, Scribble forms a complex with the MAPK components ERK1/2 in a growth factor dependent manner. In RNAi experiments where Scribble expression is efficiently depleted sustained ERK1/2 phosphorylation is reduced. Conversely, siRNA with intermediate Scribble silencing efficiency fails to match this effect indicating that ERK1/2 activation depends on basic Scribble protein levels. Finally, Scribble translocates to the plasma membrane in response to growth factor where it complexes with HRas and Rac1 suggesting that the phenotype activated by loss of Scribble may be a result of altered GTPase activity. Together, these results demonstrate a novel role for Scribble in neurite outgrowth of PC12 cells. (c) 2013 Elsevier GmbH. All rights reserved.

Place, publisher, year, edition, pages
2013. Vol. 92, no 6-7, p. 213-221
Keywords [en]
Scribble, Cell polarity, Neurite outgrowth, MAPK pathway, HRas, Erk1/2
National Category
Medical and Health Sciences
Research subject
Medicine
Identifiers
URN: urn:nbn:se:oru:diva-32164DOI: 10.1016/j.ejcb.2013.07.002ISI: 000324971200003PubMedID: 23973368OAI: oai:DiVA.org:oru-32164DiVA, id: diva2:663705
Available from: 2013-11-12 Created: 2013-10-28 Last updated: 2017-12-06Bibliographically approved

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Johansson, Magnus

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