Journal
BRITISH JOURNAL OF PHARMACOLOGY
Volume 162, Issue 2, Pages 328-345Publisher
WILEY
DOI: 10.1111/j.1476-5381.2010.01064.x
Keywords
GRP94; heat shock proteins; calreticulin; geldanamycin; celecoxib; glucosidase; unfolded protein response; cancer; autoimmunity; IL-12
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Funding
- Ministerio de Ciencia e Inovacion (MICINN, Madrid, Spain) [SAF2008-00433]
- Gobierno Vasco's SAIOTEK Program [S-PE09UN33]
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Cytosolic heat shock proteins have received significant attention as emerging therapeutic targets. Much of this excitement has been triggered by the discovery that HSP90 plays a central role in the maintenance and stability of multifarious oncogenic membrane receptors and their resultant tyrosine kinase activity. Numerous studies have dealt with the effects of small molecules on chaperone- and stress-related pathways of the endoplasmic reticulum (ER). However, unlike cytosolic chaperones, relatively little emphasis has been placed upon translational avenues towards targeting of the ER for inhibition of folding/secretion of disease-promoting proteins. Here, we summarise existing small molecule inhibitors and potential future targets of ER chaperone-mediated inhibition. Client proteins of translational relevance in disease treatment are outlined, alongside putative future disease treatment modalities based on ER-centric targeted therapies. Particular attention is paid to cancer and autoimmune disorders via the effects of the GRP94 inhibitor geldanamycin and its population of client proteins, overloading of the unfolded protein response, and inhibition of members of the IL-12 family of cytokines by celecoxib and non-coxib analogues.
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