Trebble, PJ, Woolven, JM, Saunders, KA et al. (4 more authors) (2013) A ligand-specific kinetic switch regulates glucocorticoid receptor trafficking and function. Journal of Cell Science, 126 (14). pp. 3159-3169. ISSN 0021-9533
Abstract
The ubiquitously expressed glucocorticoid receptor (GR) is a major drug target for inflammatory disease, but issues of specificity and target tissue sensitivity remain. We now identify high potency, non-steroidal GR ligands, GSK47867A and GSK47869A, which induce a novel conformation of the GR ligand-binding domain (LBD) and augment the efficacy of cellular action. Despite their high potency, GSK47867A and GSK47869A both induce surprisingly slow GR nuclear translocation, followed by prolonged nuclear GR retention, and transcriptional activity following washout. We reveal that GSK47867A and GSK47869A specifically alter the GR LBD structure at the HSP90-binding site. The alteration in the HSP90-binding site was accompanied by resistance to HSP90 antagonism, with persisting transactivation seen after geldanamycin treatment. Taken together, our studies reveal a new mechanism governing GR intracellular trafficking regulated by ligand binding that relies on a specific surface charge patch within the LBD. This conformational change permits extended GR action, probably because of altered GR–HSP90 interaction. This chemical series may offer anti-inflammatory drugs with prolonged duration of action due to altered pharmacodynamics rather than altered pharmacokinetics.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2013. Published by The Company of Biologists Ltd. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | Nuclear receptor; Glucocorticoid; GR; Heat shock protein 90; Crystal structure; Subcellular trafficking |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) > Leeds Institute of Cancer and Pathology (LICAP) > Oncology and Cancer Research - Labs (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 09 Aug 2016 11:36 |
Last Modified: | 09 Aug 2016 11:36 |
Published Version: | http://dx.doi.org/10.1242/jcs.124784 |
Status: | Published |
Publisher: | Company of Biologists |
Identification Number: | 10.1242/jcs.124784 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:99714 |