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Albakova Z, Mangasarova Y, Albakov A, Gorenkova L. HSP70 and HSP90 in Cancer: Cytosolic, Endoplasmic Reticulum and Mitochondrial Chaperones of Tumorigenesis. Front Oncol 2022; 12:829520. [PMID: 35127545 PMCID: PMC8814359 DOI: 10.3389/fonc.2022.829520] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Accepted: 01/03/2022] [Indexed: 12/12/2022] Open
Abstract
HSP70 and HSP90 are two powerful chaperone machineries involved in survival and proliferation of tumor cells. Residing in various cellular compartments, HSP70 and HSP90 perform specific functions. Concurrently, HSP70 and HSP90 homologs may also translocate from their primary site under various stress conditions. Herein, we address the current literature on the role of HSP70 and HSP90 chaperone networks in cancer. The goal is to provide a comprehensive review on the functions of cytosolic, mitochondrial and endoplasmic reticulum HSP70 and HSP90 homologs in cancer. Given that high expression of HSP70 and HSP90 enhances tumor development and associates with tumor aggressiveness, further understanding of HSP70 and HSP90 chaperone networks may provide clues for the discoveries of novel anti-cancer therapies.
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Affiliation(s)
- Zarema Albakova
- Department of Biology, Lomonosov Moscow State University, Moscow, Russia
- *Correspondence: Zarema Albakova,
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2
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GRP75 modulates oncogenic Dbl-driven endocytosis derailed via the CHIP-mediated ubiquitin degradation pathway. Cell Death Dis 2018; 9:971. [PMID: 30250167 PMCID: PMC6155137 DOI: 10.1038/s41419-018-1039-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 08/13/2018] [Accepted: 09/04/2018] [Indexed: 02/07/2023]
Abstract
Chaperone-assisted proteasome degradation of oncogenic protein acts as an upstream signal controlling tumorigenesis and progression. The understanding of the co-regulation of chaperone and oncoprotein of endocytosis pathways is extremely limited. In this study, we showed for the first time that proto-Dbl (dbl proto-oncogene product) is co-enriched with mitochondrial chaperone GRP75 in endocytosis vesicles from ovarian cancer cells. onco-Dbl, produced by oncogenic mutation/degradation of proto-Dbl, markedly enhanced cellular macropinocytosis but suppressed clathrin-mediated endocytosis and clathrin-independent endocytosis pathways, presenting a derailed endocytosis phenotype. GRP75 was associated with proto-Dbl inside cells and modulated Dbl-driven endocytosis derailed by a co-regulatory mode. In spite of not being a component of the Hsc70/Hsp90/proto-Dbl complex, the degradation of proto-Dbl was promoted by GRP75 through the CHIP-mediated ubiquitin–proteasome pathway, of which GRP75 acts as a cooperator with CHIP but also acts as a competitor to Hsc70 and Hsp90 in the multiple chaperones-assisted pro-folding/pro-degradation machinery. Knockdown or inhibition of GRP75 attenuated proto-Dbl degradation and reduced the onco-Dbl level, which differentially impaired Rho GTPases activation and therefore shifted the endocytosis-derailed phenotype. Our data uncovered a novel GRP75-Dbl endocytosis regulatory axis and provided an alternative using chaperone inhibitor to shut down the oncoprotein-driven endocytosis derailment mechanism.
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Niu X, Gao Z, Qi S, Su L, Yang N, Luan X, Li J, Zhang Q, An Y, Zhang S. Macropinocytosis activated by oncogenic Dbl enables specific targeted delivery of Tat/pDNA nano-complexes into ovarian cancer cells. Int J Nanomedicine 2018; 13:4895-4911. [PMID: 30214196 PMCID: PMC6122892 DOI: 10.2147/ijn.s171361] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Successful implementation of gene therapy heavily relies on efficiently delivering genetic materials and specific targeting into cells. Oncogene-driven endocytosis stimulates nutrient uptake and also develops an endocytosis-mediated defense against therapeutic agents. Cell-penetrating peptides, typically HIV-Tat, are well known for efficient delivery of nucleic acid drugs but lack targeting specificity. Various passive targeting strategies were pursued to enhance the tumor targeting efficiency; however, they are still limited by complicated cellular endocytosis routes and the heterogeneity of cancer types. METHODS Tat/pDNA complexes were noncovalently compacted and their physiochemical properties were determined. The siRNA pool and pLV-RNAi-GFP lentivirus were used to knock down dbl oncogene (originally isolated from diffuse B-cell lymphoma) expression, and its overexpression was performed by plasmid transient transfection. The cellular uptake of fluorescent ligands was quantified by confocal imaging and flow cytometry analysis. The transgene efficiency was determined by the Luciferase expression assay. Rho GTPase activation was checked by the GST-Rho GTPase-binding domain pull-down assay. RESULTS pGL3 plasmid DNA was noncovalently compacted with the Tat peptide into nano-size complexes at high N/P ratios. Macropinocytosis, a clathrin- and caveolin-independent endocytosis process, was shown to contribute to the uptake of middle-sized (∼600 nm) Tat/pGL3 complexes. Cell-type-specific variation in macropinocytosis was essentially controlled by the action of the Dbl oncogene. Onco-Dbl presentation constantly induced a high level of macropinocytosis activity in ovarian cancer cells. Onco-Dbl overexpression hyperstimulated macropinocytosis enhancement in cells mainly through actin cytoskeleton reorganization mediated by the PH domain and Rac1 activation. The Dbl-driven Rho GTPase signaling collectively determined the cell-type-specific macropinocytosis phenotype. CONCLUSION Such an aspect can be exploited to selectively confer targeted delivery of Tat/pDNA nano-complexes into ovarian cancer cells. Our work provides a novel alternative for targeted delivery of cell-penetrating peptide-based nucleic acid drugs into certain tumor types if specific endocytosis pathways are used.
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Affiliation(s)
- Xiuran Niu
- Department of Cell Biology, School of Medicine, Nankai University, Tianjin, People's Republic of China,
| | - Zhihui Gao
- Department of Cell Biology, School of Medicine, Nankai University, Tianjin, People's Republic of China,
| | - Shanshan Qi
- Department of Cell Biology, School of Medicine, Nankai University, Tianjin, People's Republic of China,
| | - Linjia Su
- Department of Cell Biology, School of Medicine, Nankai University, Tianjin, People's Republic of China,
| | - Nan Yang
- Department of Cell Biology, School of Medicine, Nankai University, Tianjin, People's Republic of China,
| | - Xiuli Luan
- Department of Cell Biology, School of Medicine, Nankai University, Tianjin, People's Republic of China,
| | - Jia Li
- Department of Cell Biology, School of Medicine, Nankai University, Tianjin, People's Republic of China,
| | - Qing Zhang
- Department of Clinical Laboratory, Cancer Hospital of Tianjin Medical University, Tianjin, People's Republic of China
| | - Yingli An
- State Key Laboratory of Medicinal Chemical Biology and Institute of Polymer Chemistry, Nankai University, Tianjin, People's Republic of China
| | - Sihe Zhang
- Department of Cell Biology, School of Medicine, Nankai University, Tianjin, People's Republic of China,
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Sintiprungrat K, Singhto N, Thongboonkerd V. Characterization of calcium oxalate crystal-induced changes in the secretome of U937 human monocytes. MOLECULAR BIOSYSTEMS 2016; 12:879-89. [DOI: 10.1039/c5mb00728c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
This is the first study to characterize changes in the secretome of human monocytes induced by calcium oxalate crystals.
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Affiliation(s)
- Kitisak Sintiprungrat
- Medical Proteomics Unit
- Office for Research and Development
- Faculty of Medicine Siriraj Hospital
- Mahidol University
- Bangkok
| | - Nilubon Singhto
- Medical Proteomics Unit
- Office for Research and Development
- Faculty of Medicine Siriraj Hospital
- Mahidol University
- Bangkok
| | - Visith Thongboonkerd
- Medical Proteomics Unit
- Office for Research and Development
- Faculty of Medicine Siriraj Hospital
- Mahidol University
- Bangkok
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DeGeer J, Kaplan A, Mattar P, Morabito M, Stochaj U, Kennedy TE, Debant A, Cayouette M, Fournier AE, Lamarche-Vane N. Hsc70 chaperone activity underlies Trio GEF function in axon growth and guidance induced by netrin-1. J Cell Biol 2015; 210:817-32. [PMID: 26323693 PMCID: PMC4555821 DOI: 10.1083/jcb.201505084] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
During development, netrin-1 is both an attractive and repulsive axon guidance cue and mediates its attractive function through the receptor Deleted in Colorectal Cancer (DCC). The activation of Rho guanosine triphosphatases within the extending growth cone facilitates the dynamic reorganization of the cytoskeleton required to drive axon extension. The Rac1 guanine nucleotide exchange factor (GEF) Trio is essential for netrin-1-induced axon outgrowth and guidance. Here, we identify the molecular chaperone heat shock cognate protein 70 (Hsc70) as a novel Trio regulator. Hsc70 dynamically associated with the N-terminal region and Rac1 GEF domain of Trio. Whereas Hsc70 expression supported Trio-dependent Rac1 activation, adenosine triphosphatase-deficient Hsc70 (D10N) abrogated Trio Rac1 GEF activity and netrin-1-induced Rac1 activation. Hsc70 was required for netrin-1-mediated axon growth and attraction in vitro, whereas Hsc70 activity supported callosal projections and radial neuronal migration in the embryonic neocortex. These findings demonstrate that Hsc70 chaperone activity is required for Rac1 activation by Trio and this function underlies netrin-1/DCC-dependent axon outgrowth and guidance.
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Affiliation(s)
- Jonathan DeGeer
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec H3A 0C7, Canada The Research Institute of McGill University Health Centre, Montreal, Quebec H4A 3J1, Canada
| | - Andrew Kaplan
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec H3A 2B4, Canada
| | - Pierre Mattar
- Cellular Neurobiology Research Unit, Institut de Recherches Cliniques de Montréal, Montreal, Quebec H2W 1R7, Canada
| | - Morgane Morabito
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec H3A 0C7, Canada The Research Institute of McGill University Health Centre, Montreal, Quebec H4A 3J1, Canada
| | - Ursula Stochaj
- Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - Timothy E Kennedy
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec H3A 0C7, Canada Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec H3A 2B4, Canada
| | - Anne Debant
- Centre de Recherche de Biochimie Macromoléculaire, Centre National de la Recherche Scientifique, UMR5237, University of Montpellier, Montpellier 34293, France
| | - Michel Cayouette
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec H3A 0C7, Canada Cellular Neurobiology Research Unit, Institut de Recherches Cliniques de Montréal, Montreal, Quebec H2W 1R7, Canada Department of Medicine, Université de Montréal, Montreal, Quubec H3T 1J4, Canada
| | - Alyson E Fournier
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec H3A 0C7, Canada Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec H3A 2B4, Canada
| | - Nathalie Lamarche-Vane
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec H3A 0C7, Canada The Research Institute of McGill University Health Centre, Montreal, Quebec H4A 3J1, Canada
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Label-free quantitative mass spectrometry reveals a panel of differentially expressed proteins in colorectal cancer. BIOMED RESEARCH INTERNATIONAL 2015; 2015:365068. [PMID: 25699276 PMCID: PMC4324820 DOI: 10.1155/2015/365068] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 11/18/2014] [Indexed: 12/22/2022]
Abstract
To identify potential biomarkers involved in CRC, a shotgun proteomic method was applied to identify soluble proteins in three CRCs and matched normal mucosal tissues using high-performance liquid chromatography and mass spectrometry. Label-free protein profiling of three CRCs and matched normal mucosal tissues were then conducted to quantify and compare proteins. Results showed that 67 of the 784 identified proteins were linked to CRC (28 upregulated and 39 downregulated). Gene Ontology and DAVID databases were searched to identify the location and function of differential proteins that were related to the biological processes of binding, cell structure, signal transduction, cell adhesion, and so on. Among the differentially expressed proteins, tropomyosin-3 (TPM3), endoplasmic reticulum resident protein 29 (ERp29), 18 kDa cationic antimicrobial protein (CAMP), and heat shock 70 kDa protein 8 (HSPA8) were verified to be upregulated in CRC tissue and seven cell lines through western blot analysis. Furthermore, the upregulation of TPM3, ERp29, CAMP, and HSPA8 was validated in 69 CRCs byimmunohistochemistry (IHC) analysis. Combination of TPM3, ERp29, CAMP, and HSPA8 can identify CRC from matched normal mucosal achieving an accuracy of 73.2% using IHC score. These results suggest that TPM3, ERp29, CAMP, and HSPA8 are great potential IHC diagnostic biomarkers for CRC.
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Gupta M, Qi X, Thakur V, Manor D. Tyrosine phosphorylation of Dbl regulates GTPase signaling. J Biol Chem 2014; 289:17195-202. [PMID: 24778185 DOI: 10.1074/jbc.m114.573782] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Rho GTPases are molecular "switches" that cycle between "on" (GTP-bound) and "off" (GDP-bound) states and regulate numerous cellular activities such as gene expression, protein synthesis, cytoskeletal rearrangements, and metabolic responses. Dysregulation of GTPases is a key feature of many diseases, especially cancers. Guanine nucleotide exchange factors (GEFs) of the Dbl family are activated by mitogenic cell surface receptors and activate the Rho family GTPases Cdc42, Rac1, and RhoA. The molecular mechanisms that regulate GEFs from the Dbl family are poorly understood. Our studies reveal that Dbl is phosphorylated on tyrosine residues upon stimulation by growth factors and that this event is critical for the regulated activation of the GEF. These findings uncover a novel layer of complexity in the physiological regulation of this protein.
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Affiliation(s)
- Meghana Gupta
- From the Departments of Pharmacology, and Nutrition, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106
| | - Xiaojun Qi
- Nutrition, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106
| | - Varsha Thakur
- Nutrition, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106
| | - Danny Manor
- From the Departments of Pharmacology, and Nutrition, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106
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Wang BS, Yang Y, Yang H, Liu YZ, Hao JJ, Zhang Y, Shi ZZ, Jia XM, Zhan QM, Wang MR. PKCι counteracts oxidative stress by regulating Hsc70 in an esophageal cancer cell line. Cell Stress Chaperones 2013; 18:359-66. [PMID: 23224638 PMCID: PMC3631091 DOI: 10.1007/s12192-012-0389-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Revised: 11/15/2012] [Accepted: 11/27/2012] [Indexed: 11/25/2022] Open
Abstract
Using a glutathione S-transferase pull-down liquid chromatography-coupled tandem mass spectrometry approach and immunoprecipitation/immunoblot analysis, we found that heat shock cognate protein 70 (Hsc70) was involved in the complex formed by atypical protein kinase Cι (PKCι) and LC3 in the esophageal cancer cell line KYSE30. Further study indicated that Hsc70 was targeted by autophagic degradation, and knockdown of PKCι down-regulated Hsc70 by promoting autophagy. PKCι knockdown sensitized cells to oxidative stress-induced apoptosis, whereas forced PKCι expression counteracted the oxidative stress-induced apoptosis via Hsc70.
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Affiliation(s)
- Bo-Shi Wang
- />State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, 17 Panjiayuan Nanli, Chaoyang District, Beijing, 100021 China
| | - Yang Yang
- />State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, 17 Panjiayuan Nanli, Chaoyang District, Beijing, 100021 China
- />Department of Histology and Embryology, Anhui Medical University, Hefei, China
| | - Hai Yang
- />State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, 17 Panjiayuan Nanli, Chaoyang District, Beijing, 100021 China
| | - Yi-Zhen Liu
- />State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, 17 Panjiayuan Nanli, Chaoyang District, Beijing, 100021 China
| | - Jia-Jie Hao
- />State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, 17 Panjiayuan Nanli, Chaoyang District, Beijing, 100021 China
| | - Yu Zhang
- />State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, 17 Panjiayuan Nanli, Chaoyang District, Beijing, 100021 China
| | - Zhi-Zhou Shi
- />State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, 17 Panjiayuan Nanli, Chaoyang District, Beijing, 100021 China
| | - Xue-Mei Jia
- />Department of Histology and Embryology, Anhui Medical University, Hefei, China
| | - Qi-Min Zhan
- />State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, 17 Panjiayuan Nanli, Chaoyang District, Beijing, 100021 China
| | - Ming-Rong Wang
- />State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, 17 Panjiayuan Nanli, Chaoyang District, Beijing, 100021 China
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Gupta M, Kamynina E, Morley S, Chung S, Muakkassa N, Wang H, Brathwaite S, Sharma G, Manor D. Plekhg4 is a novel Dbl family guanine nucleotide exchange factor protein for rho family GTPases. J Biol Chem 2013; 288:14522-14530. [PMID: 23572525 DOI: 10.1074/jbc.m112.430371] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Mutations in the PLEKHG4 (puratrophin-1) gene are associated with the heritable neurological disorder autosomal dominant spinocerebellar ataxia. However, the biochemical functions of this gene product have not been described. We report here that expression of Plekhg4 in the murine brain is developmentally regulated, with pronounced expression in the newborn midbrain and brainstem that wanes with age and maximal expression in the cerebellar Purkinje neurons in adulthood. We show that Plekhg4 is subject to ubiquitination and proteasomal degradation, and its steady-state expression levels are regulated by the chaperones Hsc70 and Hsp90 and by the ubiquitin ligase CHIP. On the functional level, we demonstrate that Plekhg4 functions as a bona fide guanine nucleotide exchange factor (GEF) that facilitates activation of the small GTPases Rac1, Cdc42, and RhoA. Overexpression of Plekhg4 in NIH3T3 cells induces rearrangements of the actin cytoskeleton, specifically enhanced formation of lamellopodia and fillopodia. These findings indicate that Plekhg4 is an aggregation-prone member of the Dbl family GEFs and that regulation of GTPase signaling is critical for proper cerebellar function.
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Affiliation(s)
- Meghana Gupta
- Department of Pharmacology, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106
| | | | - Samantha Morley
- Department of Nutrition, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106
| | - Stacey Chung
- Department of Nutrition, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106
| | | | - Hong Wang
- Department of Nutrition, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106
| | - Shayna Brathwaite
- Department of Nutrition, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106
| | | | - Danny Manor
- Department of Pharmacology, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106; Department of Nutrition, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106.
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Błajecka K, Marinov M, Leitner L, Uth K, Posern G, Arcaro A. Phosphoinositide 3-kinase C2β regulates RhoA and the actin cytoskeleton through an interaction with Dbl. PLoS One 2012; 7:e44945. [PMID: 22984590 PMCID: PMC3440356 DOI: 10.1371/journal.pone.0044945] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Accepted: 08/14/2012] [Indexed: 12/31/2022] Open
Abstract
The regulation of cell morphology is a dynamic process under the control of multiple protein complexes acting in a coordinated manner. Phosphoinositide 3-kinases (PI3K) and their lipid products are widely involved in cytoskeletal regulation by interacting with proteins regulating RhoGTPases. Class II PI3K isoforms have been implicated in the regulation of the actin cytoskeleton, although their exact role and mechanism of action remain to be established. In this report, we have identified Dbl, a Rho family guanine nucleotide exchange factor (RhoGEF) as an interaction partner of PI3KC2β. Dbl was co-immunoprecipitated with PI3KC2β in NIH3T3 cells and cancer cell lines. Over-expression of Class II phosphoinositide 3-kinase PI3KC2β in NIH3T3 fibroblasts led to increased stress fibres formation and cell spreading. Accordingly, we found high basal RhoA activity and increased serum response factor (SRF) activation downstream of RhoA upon serum stimulation. In contrast, the dominant-negative form of PI3KC2β strongly reduced cell spreading and stress fibres formation, as well as SRF response. Platelet-derived growth factor (PDGF) stimulation of wild-type PI3KC2β over-expressing NIH3T3 cells strongly increased Rac and c-Jun N-terminal kinase (JNK) activation, but failed to show similar effect in the cells with the dominant-negative enzyme. Interestingly, epidermal growth factor (EGF) and PDGF stimulation led to increased extracellular signal-regulated kinase (Erk) and Akt pathway activation in cells with elevated wild-type PI3KC2β expression. Furthermore, increased expression of PI3KC2β protected NIH3T3 from detachment-dependent death (anoikis) in a RhoA-dependent manner. Taken together, these findings suggest that PI3KC2β modulates the cell morphology and survival through a specific interaction with Dbl and the activation of RhoA.
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Affiliation(s)
- Karolina Błajecka
- Department of Clinical Research, University of Bern, Bern, Switzerland
| | - Marin Marinov
- Department of Oncology, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Laura Leitner
- Department of Molecular Biology, AG Regulation of Gene Expression, Max-Planck-Institute of Biochemistry, Martinsried, Germany
| | - Kristin Uth
- Department of Clinical Research, University of Bern, Bern, Switzerland
| | - Guido Posern
- Department of Molecular Biology, AG Regulation of Gene Expression, Max-Planck-Institute of Biochemistry, Martinsried, Germany
| | - Alexandre Arcaro
- Department of Clinical Research, University of Bern, Bern, Switzerland
- * E-mail:
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Comprehensive review on the HSC70 functions, interactions with related molecules and involvement in clinical diseases and therapeutic potential. Pharmacol Ther 2012; 136:354-74. [PMID: 22960394 DOI: 10.1016/j.pharmthera.2012.08.014] [Citation(s) in RCA: 193] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 08/14/2012] [Indexed: 12/28/2022]
Abstract
Heat shock cognate protein 70 (HSC70) is a constitutively expressed molecular chaperone which belongs to the heat shock protein 70 (HSP70) family. HSC70 shares some of the structural and functional similarity with HSP70. HSC70 also has different properties compared with HSP70 and other heat shock family members. HSC70 performs its full functions by the cooperation of co-chaperones. It interacts with many other molecules as well and regulates various cellular functions. It is also involved in various diseases and may become a biomarker for diagnosis and potential therapeutic targets for design, discovery, and development of novel drugs to treat various diseases. In this article, we provide a comprehensive review on HSC70 from the literatures including the basic general information such as classification, structure and cellular location, genetics and function, as well as its protein association and interaction with other proteins. In addition, we also discussed the relationship of HSC70 and related clinical diseases such as cancer, cardiovascular, neurological, hepatic and many other diseases and possible therapeutic potential and highlight the progress and prospects of research in this field. Understanding the functions of HSC70 and its interaction with other molecules will help us to reveal other novel properties of this protein. Scientists may be able to utilize this protein as a biomarker and therapeutic target to make significant advancement in scientific research and clinical setting in the future.
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Chen K, Luo Z, Tang J, Zheng SJ. A critical role of heat shock cognate protein 70 in Apoptin-induced phosphorylation of Akt. Biochem Biophys Res Commun 2011; 409:200-4. [DOI: 10.1016/j.bbrc.2011.04.119] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Accepted: 04/24/2011] [Indexed: 10/18/2022]
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Linnoila J, Wang Y, Yao Y, Wang ZZ. A mammalian homolog of Drosophila tumorous imaginal discs, Tid1, mediates agrin signaling at the neuromuscular junction. Neuron 2009; 60:625-41. [PMID: 19038220 DOI: 10.1016/j.neuron.2008.09.025] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2007] [Revised: 05/14/2008] [Accepted: 09/12/2008] [Indexed: 11/29/2022]
Abstract
Motoneuron-derived agrin clusters nicotinic acetylcholine receptors (AChRs) in mammalian muscle cells. We used two-hybrid screens to identify a protein, tumorous imaginal discs (Tid1), that binds to the cytoplasmic domain of muscle-specific kinase (MuSK), a major component of the agrin receptor. Like MuSK, Tid1 colocalizes with AChRs at developing, adult, and denervated motor endplates. Knockdown of Tid1 by short hairpin RNA (shRNA) in skeletal muscle fibers dispersed synaptic AChR clusters and impaired neuromuscular transmission. In cultured myotubes, Tid1 knockdown inhibited AChR clustering, as well as agrin-induced activation of the Rac and Rho small GTPases and tyrosine phosphorylation of the AChR, without affecting MuSK activation. Tid1 knockdown also decreased Dok-7-induced clustering of AChRs. Overexpression of the N-terminal half of Tid1 induced agrin- and MuSK-independent phosphorylation and clustering of AChRs. These results demonstrate that Tid1 is an essential component of the agrin signaling pathway, crucial for synaptic development.
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Affiliation(s)
- Jenny Linnoila
- Molecular Pharmacology Graduate Training Program, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA.
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Murakami M, Meneses PI, Knight JS, Lan K, Kaul R, Verma SC, Robertson ES. Nm23-H1 modulates the activity of the guanine exchange factor Dbl-1. Int J Cancer 2008; 123:500-10. [PMID: 18470881 DOI: 10.1002/ijc.23568] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Cytoskeleton rearrangement is necessary for tumor invasion and metastasis. Cellular molecules whose role is to regulate components of the cytoskeletal structure can dictate changes in cellular morphology. One of these molecules is the suppressor of tumor metastasis Nm23-H1. The level of Nm23-H1 expression has been linked to the invasiveness and metastatic potential of human cancers including melanoma and breast cancer. In this report, we demonstrate an interaction between the suppressor of tumor metastasis Nm23-H1, and Dbl-1, an oncoprotein which is associated with guanine exchange and belongs to a family of Guanine Exchange Factors (GEF). Nm23-H1 also was shown to bind pDbl which is the proto-oncoprotein of Dbl. Interestingly, the interaction between Nm23-H1 and Dbl-1 rescues the suppression of the cell motility activity Nm23-H1. Moreover, this interaction results in loss of the ability of the Dbl-1 oncoprotein to function as a GEF for the critical Rho-GTPase family member Cdc42. The loss of GTP loading onto Cdc42 resulted in a dramatic reduction in adhesion stimulated ruffles and suggests that Nm23-H1 can negatively regulate cell migration and tumor metastasis by modulating the activity of Cdc42 through direct interaction with Dbl-1.
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Affiliation(s)
- Masanao Murakami
- Department of Microbiology, Tumor Virology Program of the Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA 19104, USA
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15
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Li L, Johnson LA, Dai-Ju JQ, Sandri-Goldin RM. Hsc70 focus formation at the periphery of HSV-1 transcription sites requires ICP27. PLoS One 2008; 3:e1491. [PMID: 18231578 PMCID: PMC2200795 DOI: 10.1371/journal.pone.0001491] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2007] [Accepted: 12/25/2007] [Indexed: 12/23/2022] Open
Abstract
Background The cellular chaperone protein Hsc70, along with components of the 26S proteasome and ubiquitin-conjugated proteins have been shown to be sequestered in discrete foci in the nuclei of herpes simplex virus 1 (HSV-1) infected cells. We recently reported that cellular RNA polymerase II (RNAP II) undergoes proteasomal degradation during robust HSV-1 transcription, and that the immediate early protein ICP27 interacts with the C-terminal domain and is involved in the recruitment of RNAP II to viral transcription/replication compartments. Methodology/Principle Findings Here we show that ICP27 also interacts with Hsc70, and is required for the formation of Hsc70 nuclear foci. During infection with ICP27 mutants that are unable to recruit RNAP II to viral replication sites, viral transcript levels were greatly reduced, viral replication compartments were poorly formed and Hsc70 focus formation was curtailed. Further, a dominant negative Hsc70 mutant that cannot hydrolyze ATP, interfered with RNAP II degradation during HSV-1 infection, and an increase in ubiquitinated forms of RNAP II was observed. There was also a decrease in virus yields, indicating that proteasomal degradation of stalled RNAP II complexes during robust HSV-1 transcription and replication benefits viral gene expression. Conclusions/Significance We propose that one function of the Hsc70 nuclear foci may be to serve to facilitate the process of clearing stalled RNAP II complexes from viral genomes during times of highly active transcription.
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Affiliation(s)
- Ling Li
- Department of Microbiology and Molecular Genetics, School of Medicine, University of California, Irvine, California, United States of America
| | - Lisa A. Johnson
- Department of Microbiology and Molecular Genetics, School of Medicine, University of California, Irvine, California, United States of America
| | - Jenny Q. Dai-Ju
- Department of Microbiology and Molecular Genetics, School of Medicine, University of California, Irvine, California, United States of America
| | - Rozanne M. Sandri-Goldin
- Department of Microbiology and Molecular Genetics, School of Medicine, University of California, Irvine, California, United States of America
- * To whom correspondence should be addressed. E-mail:
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16
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Kamynina E, Kauppinen K, Duan F, Muakkassa N, Manor D. Regulation of proto-oncogenic dbl by chaperone-controlled, ubiquitin-mediated degradation. Mol Cell Biol 2006; 27:1809-22. [PMID: 17178836 PMCID: PMC1820456 DOI: 10.1128/mcb.01051-06] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The dbl proto-oncogene product is a prototype of a growing family of guanine nucleotide exchange factors (GEFs) that stimulate the activation of small GTP-binding proteins from the Rho family. Mutations that result in the loss of proto-Dbl's amino terminus produce a variant with constitutive GEF activity and high oncogenic potential. Here, we show that proto-Dbl is a short-lived protein that is kept at low levels in cells by efficient ubiquitination and degradation. The cellular fate of proto-Dbl is regulated by interactions with the chaperones Hsc70 and Hsp90 and the protein-ubiquitin ligase CHIP, and these interactions are mediated by the spectrin domain of proto-Dbl. We show that CHIP is the E3 ligase responsible for ubiquitination and proteasomal degradation of proto-Dbl, while Hsp90 functions to stabilize the protein. Onco-Dbl, lacking the spectrin homology domain, cannot bind these regulators and therefore accumulates in cells at high levels, leading to persistent stimulation of its downstream signaling pathways.
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Affiliation(s)
- Elena Kamynina
- Case School of Medicine, WG-48, Case Western Reserve University, Cleveland, OH 44106, USA.
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17
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Hayashida N, Inouye S, Fujimoto M, Tanaka Y, Izu H, Takaki E, Ichikawa H, Rho J, Nakai A. A novel HSF1-mediated death pathway that is suppressed by heat shock proteins. EMBO J 2006; 25:4773-83. [PMID: 17024176 PMCID: PMC1618102 DOI: 10.1038/sj.emboj.7601370] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2006] [Accepted: 09/04/2006] [Indexed: 12/24/2022] Open
Abstract
Heat shock response is an adoptive response to proteotoxic stress, and a major heat shock transcription factor 1 (HSF1) has been believed to protect cells from cell death by inducing heat shock proteins (Hsps) that assist protein folding and prevent protein denaturation. However, it is revealed recently that HSF1 also promotes cell death of male germ cells. Here, we found a proapoptotic Tdag51 (T-cell death associated gene 51) gene as a direct target gene of HSF1. Heat shock and other stresses induced different levels of Hsps and Tdag51, which depend on cell types. Hsps bound directly to the N-terminal pleckstrin-homology like (PHL) domain of Tdag51, and suppressed death activity of the C-terminal proline/glutamine/histidine-rich domain. Tdag51, but not major Hsps, were induced in male germ cells exposed to high temperatures. Analysis of Tdag51-null testes showed that Tdag51 played substantial roles in promoting heat shock-induced cell death in vivo. These data suggest that cell fate on proteotoxic condition is determined at least by balance between Hsp and Tdag51 levels, which are differently regulated by HSF1.
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Affiliation(s)
- Naoki Hayashida
- Department of Biochemistry and Molecular Biology, Yamaguchi University School of Medicine, Ube, Japan
| | - Sachiye Inouye
- Department of Biochemistry and Molecular Biology, Yamaguchi University School of Medicine, Ube, Japan
| | - Mitsuaki Fujimoto
- Department of Biochemistry and Molecular Biology, Yamaguchi University School of Medicine, Ube, Japan
| | - Yasunori Tanaka
- Department of Biochemistry and Molecular Biology, Yamaguchi University School of Medicine, Ube, Japan
| | - Hanae Izu
- Department of Biochemistry and Molecular Biology, Yamaguchi University School of Medicine, Ube, Japan
| | - Eiichi Takaki
- Department of Biochemistry and Molecular Biology, Yamaguchi University School of Medicine, Ube, Japan
| | - Hitoshi Ichikawa
- ancer Transcriptome Project, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan
| | - Jaerang Rho
- Department of Microbiology, Natural Science College, Chungnam National University, Yuseong-gu, Daejeon, Korea
| | - Akira Nakai
- Department of Biochemistry and Molecular Biology, Yamaguchi University School of Medicine, Ube, Japan
- Department of Biochemistry and Molecular Biology, Yamaguchi University School of Medicine, Minami-Kogushi 1-1-1, Ube 755-8505, Japan. Tel.: 81 836 22 2214; Fax: 81 836 22 2315; E-mail:
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