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Glucose-regulated proteins in cancer: molecular mechanisms and therapeutic potential

Amy S. Lee
- 01 Apr 2014 - 
- Vol. 14, Iss: 4, pp 263-276
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TLDR
The glucose-regulated proteins are found and regulation are described, as well as their biological functions in cancer and promising agents that use or target the GRPs are developed, and their efficacy as anticancer therapeutics is discussed.
Abstract
The glucose-regulated proteins (GRPs) are stress-inducible chaperones that mostly reside in the endoplasmic reticulum or the mitochondria. Recent advances show that the GRPs have functions that are distinct from those of the related heat shock proteins, and they can be actively translocated to other cellular locations and assume novel functions that control signalling, proliferation, invasion, apoptosis, inflammation and immunity. Mouse models further identified their specific roles in development, tumorigenesis, metastasis and angiogenesis. This Review describes their discovery and regulation, as well as their biological functions in cancer. Promising agents that use or target the GRPs are being developed, and their efficacy as anticancer therapeutics is also discussed.

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Emerging applications of metabolomics in drug discovery and precision medicine

TL;DR: This Review discusses some of the latest technological advances in metabolomics, focusing on the application of metabolomics towards uncovering the underlying causes of complex diseases, the growing role of metabolites in drug discovery and its potential effect on precision medicine.
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Endoplasmic Reticulum Stress and the Hallmarks of Cancer

TL;DR: A comprehensive overview of the contribution of the UPR to cancer biology and the acquisition of malignant characteristics is provided, thus highlighting novel aspects including inflammation, invasion and metastasis, genome instability, resistance to chemo/radiotherapy, and angiogenesis.
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HSPA5 Regulates Ferroptotic Cell Death in Cancer Cells.

TL;DR: It is shown that heatshock 70-kDa protein 5 (HSPA5) negatively regulates ferroptosis in human pancreatic ductal adenocarcinoma (PDAC) cells, and a potential therapeutic strategy for overcoming gemcitabine resistance is suggested.
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Endocrine resistance in breast cancer--An overview and update.

TL;DR: This review explores the basic mechanisms of resistance to endocrine therapies, concluding with some new insights from systems biology approaches further implicating autophagy and the UPR in detail, and a brief discussion of exciting new avenues and future prospects.
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Role of the unfolded protein response, GRP78 and GRP94 in organ homeostasis.

TL;DR: This review highlights recent progress towards the understanding of the role of the UPR and two major GRPs in regulating homeostasis of organs arising from the endoderm, mesoderm and ectoderm.
References
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Journal ArticleDOI

Signal integration in the endoplasmic reticulum unfolded protein response

TL;DR: Together, at least three mechanistically distinct arms of the UPR regulate the expression of numerous genes that function within the secretory pathway but also affect broad aspects of cell fate and the metabolism of proteins, amino acids and lipids.
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The unfolded protein response: controlling cell fate decisions under ER stress and beyond

TL;DR: Insight is provided into the regulatory mechanisms and signalling crosstalk of the three branches of the UPR, which are initiated by the stress sensors protein kinase RNA-like ER kinase (PERK), inositol-requiring protein 1α (IRE1α) and activating transcription factor 6 (ATF6).
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XBP-1 Regulates a Subset of Endoplasmic Reticulum Resident Chaperone Genes in the Unfolded Protein Response

TL;DR: It is suggested that the IRE1/XBP-1 pathway is required for efficient protein folding, maturation, and degradation in the ER and imply the existence of subsets of UPR target genes as defined by their dependence on XBP- 1.
Journal ArticleDOI

Autophagy Suppresses Tumorigenesis through Elimination of p62

TL;DR: Defective autophagy is a mechanism for p62 upregulation commonly observed in human tumors that contributes directly to tumorigenesis likely by perturbing the signal transduction adaptor function of p62-controlling pathways critical for oncogenesis.
Journal ArticleDOI

An Hsp70-like protein in the ER: identity with the 78 kd glucose-regulated protein and immunoglobulin heavy chain binding protein.

TL;DR: A cDNA clone is characterized that encodes a protein related to the 70 kd heat shock protein, but is expressed in normal rat liver, and it is identical with two previously described proteins: GRP78, whose synthesis is induced by glucose starvation, and BiP, which is found bound to immunoglobulin heavy chains in pre-B cells.
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