Small heat shock protein 20 (Hsp20) facilitates nuclear import of protein kinase D 1 (PKD1) during cardiac hypertrophy

Sin, Y. Y., Martin, T. P. , Wills, L., Currie, S. and Baillie, G. S. (2015) Small heat shock protein 20 (Hsp20) facilitates nuclear import of protein kinase D 1 (PKD1) during cardiac hypertrophy. Cell Communication and Signaling, 13, 16. (doi: 10.1186/s12964-015-0094-x) (PMID:25889640) (PMCID:PMC4356135)

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Background Nuclear import of protein kinase D1 (PKD1) is an important event in the transcriptional regulation of cardiac gene reprogramming leading to the hypertrophic growth response, however, little is known about the molecular events that govern this event. We have identified a novel complex between PKD1 and a heat shock protein (Hsp), Hsp20, which has been implicated as cardioprotective. This study aims to characterize the role of the complex in PKD1-mediated myocardial regulatory mechanisms that depend on PKD1 nuclear translocation. Results In mapping the Hsp20 binding sites on PKD1 within its catalytic unit using peptide array analysis, we were able to develop a cell-permeable peptide that disrupts the Hsp20-PKD1 complex. We use this peptide to show that formation of the Hsp20-PKD1 complex is essential for PKD1 nuclear translocation, signaling mechanisms leading to hypertrophy, activation of the fetal gene programme and pathological cardiac remodeling leading to cardiac fibrosis. Conclusions These results identify a new signaling complex that is pivotal to pathological remodelling of the heart that could be targeted therapeutically.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Baillie, Professor George and Martin, Dr Tamara and Sin, Dr Angie and WILLS, LAUREN
Authors: Sin, Y. Y., Martin, T. P., Wills, L., Currie, S., and Baillie, G. S.
College/School:College of Medical Veterinary and Life Sciences > School of Cardiovascular & Metabolic Health
Journal Name:Cell Communication and Signaling
Publisher:BioMed Central
ISSN (Online):1478-811X
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Cell Communication and Signaling 13:16
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
582921Development of small molecules that induce the cardio-protective effects of HSP20George BaillieHeart Research UK (HEART-RES)RG2610/12/14RI CARDIOVASCULAR & MEDICAL SCIENCES