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Hasan A, Rizvi SF, Parveen S, Mir SS. Molecular chaperones in DNA repair mechanisms: Role in genomic instability and proteostasis in cancer. Life Sci 2022; 306:120852. [DOI: 10.1016/j.lfs.2022.120852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 07/14/2022] [Accepted: 07/27/2022] [Indexed: 01/09/2023]
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Zhou C, Zhang C, Zhu H, Liu Z, Su H, Zhang X, Chen T, Zhong Y, Hu H, Xiong M, Zhou H, Xu Y, Zhang A, Zhang N. Allosteric Regulation of Hsp90α's Activity by Small Molecules Targeting the Middle Domain of the Chaperone. iScience 2020; 23:100857. [PMID: 32058968 PMCID: PMC6997908 DOI: 10.1016/j.isci.2020.100857] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 12/20/2019] [Accepted: 01/15/2020] [Indexed: 12/11/2022] Open
Abstract
Hsp90 is a target for anti-cancer drug development. Both the conformational events tuned by ATP/ADP and co-chaperones and the chaperoning cycle timing are required for Hsp90's fully functional display. Interfering with either one of the conformational events or the cycle timing will down-regulate Hsp90's function. In this manuscript, non-covalent allosteric modulators (SOMCL-16-171 and SOMCL-16-175) targeting Hsp90α’s middle domain (Hsp90M) were developed for the first time. Multiple techniques were then applied to characterize the interactions between two active compounds and Hsp90α. Two loops and one α-helix (F349-N360, K443-E451, and D372-G387) in Hsp90M were identified responsible for the recognition of SOMCL-16-171 and SOMCL-16-175. Meanwhile, the binding of SOMCL-16-171 and SOMCL-16-175 to Hsp90M was demonstrated to allosterically modulate the structure and function of Hsp90α’s N-terminal domain. Finally, cellular assays were conducted to evaluate the cellular activity of SOMCL-16-175, and the results indicate that SOMCL-16-175 destabilizes Hsp90's client proteins and reduces cell viability. Allosteric modulators targeting Hsp90α's middle domain were developed for the first time Key elements in Hsp90M for the recognition of allosteric modulators were identified Compound SOMCL-16-175 promotes Hsp90α’s ATPase activity and reduces cell viability SOMCL-16-175 destabilizes Hsp90's clients without triggering heat shock response
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Affiliation(s)
- Chen Zhou
- Department of Analytical Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
| | - Chi Zhang
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Hongwen Zhu
- Department of Analytical Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China; CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Zhijun Liu
- National Facility for Protein Science in Shanghai, ZhangJiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Haixia Su
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Xianglei Zhang
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Tingting Chen
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Yan Zhong
- Department of Analytical Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China; University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Huifang Hu
- Department of Analytical Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China; University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Muya Xiong
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Hu Zhou
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Yechun Xu
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China.
| | - Ao Zhang
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China.
| | - Naixia Zhang
- Department of Analytical Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China; University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China.
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Dubrez L, Causse S, Borges Bonan N, Dumétier B, Garrido C. Heat-shock proteins: chaperoning DNA repair. Oncogene 2019; 39:516-529. [DOI: 10.1038/s41388-019-1016-y] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 09/04/2019] [Accepted: 09/06/2019] [Indexed: 02/08/2023]
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Weidenauer L, Wang T, Joshi S, Chiosis G, Quadroni MR. Proteomic interrogation of HSP90 and insights for medical research. Expert Rev Proteomics 2017; 14:1105-1117. [PMID: 28990809 DOI: 10.1080/14789450.2017.1389649] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
INTRODUCTION Heat shock protein 90 (HSP90) regulates protein homeostasis in eukaryotes. As a 'professional interactor', HSP90 binds to and chaperones many proteins and has both housekeeping and disease-related functions but its regulation remains in part elusive. HSP90 complexes are a target for therapy, notably against cancer, and several inhibitors are currently in clinical trials. Proteomic studies have revealed the vast interaction network of HSP90 and, in doing so, the extent of cellular processes the chaperone takes part in, especially in yeast and human cells. Furthermore, small-molecule inhibitors were used to probe the global impact of its inhibition on the proteome. Areas covered: We review here recent HSP90-related interactomics and total proteome studies and their relevance for research on cancer, neurodegenerative and pathogen diseases. Expert commentary: Proteomics experiments are our best chance to identify the context-dependent global proteome of HSP90 and thus uncover and understand its disease-specific biology. However, understanding the complexity of HSP90 will require multiple complementary, quantitative approaches and novel bioinformatics to translate interactions into ordered functional networks and pathways. Developing therapies will necessitate more knowledge on HSP90 complexes and networks with disease relevance and on total proteome changes induced by their perturbation. Most work has been done in cancer, thus a lot remains to be done in the context of other diseases.
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Affiliation(s)
- Lorenz Weidenauer
- a Center for Integrative Genomics , University of Lausanne , Lausanne , Switzerland
| | - Tai Wang
- b Chemical Biology Program , Memorial Sloan Kettering Cancer Center , New York , NY , USA
| | - Suhasini Joshi
- b Chemical Biology Program , Memorial Sloan Kettering Cancer Center , New York , NY , USA
| | - Gabriela Chiosis
- b Chemical Biology Program , Memorial Sloan Kettering Cancer Center , New York , NY , USA.,c Department of Medicine , Memorial Sloan Kettering Cancer Center , New York , NY , USA
| | - Manfredo R Quadroni
- a Center for Integrative Genomics , University of Lausanne , Lausanne , Switzerland
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Lawag AA, Napper JM, Hunter CA, Bacon NA, Deskins S, El-Hamdani M, Govender SL, Koc EC, Sollars VE. HSP90 Inhibition and Cellular Stress Elicits Phenotypic Plasticity in Hematopoietic Differentiation. Cell Reprogram 2017; 19:311-323. [PMID: 28910138 PMCID: PMC5650721 DOI: 10.1089/cell.2017.0001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Cancer cells exist in a state of Darwinian selection using mechanisms that produce changes in gene expression through genetic and epigenetic alteration to facilitate their survival. Cellular plasticity, or the ability to alter cellular phenotype, can assist in survival of premalignant cells as they progress to full malignancy by providing another mechanism of adaptation. The connection between cellular stress and the progression of cancer has been established, although the details of the mechanisms have yet to be fully elucidated. The molecular chaperone HSP90 is often upregulated in cancers as they progress, presumably to allow cancer cells to deal with misfolded proteins and cellular stress associated with transformation. The objective of this work is to test the hypothesis that inhibition of HSP90 results in increased cell plasticity in mammalian systems that can confer a greater adaptability to selective pressures. The approach used is a murine in vitro model system of hematopoietic differentiation that utilizes a murine hematopoietic stem cell line, erythroid myeloid lymphoid (EML) clone 1, during their maturation from stem cells to granulocytic progenitors. During the differentiation protocol, 80%-90% of the cells die when placed in medium where the major growth factor is granulocyte-macrophage-colony stimulating factor. Using this selection point model, EML cells exhibit increases in cellular plasticity when they are better able to adapt to this medium and survive. Increases in cellular plasticity were found to occur upon exposure to geldanamycin to inhibit HSP90, when subjected to various forms of cellular stress, or inhibition of histone acetylation. Furthermore, we provide evidence that the cellular plasticity associated with inhibition of HSP90 in this model involves epigenetic mechanisms and is dependent upon high levels of stem cell factor signaling. This work provides evidence for a role of HSP90 and cellular stress in inducing phenotypic plasticity in mammalian systems that has new implications for cellular stress in progression and evolution of cancer.
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Affiliation(s)
- Abdalla A Lawag
- 1 Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University , Huntington, West Virginia
| | - Jennifer M Napper
- 2 Department of Natural Sciences, Shawnee State University , Portsmouth, Ohio
| | - Caroline A Hunter
- 1 Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University , Huntington, West Virginia
| | - Nickolas A Bacon
- 1 Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University , Huntington, West Virginia
| | - Seth Deskins
- 1 Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University , Huntington, West Virginia
| | - Manaf El-Hamdani
- 1 Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University , Huntington, West Virginia
| | - Sarah-Leigh Govender
- 1 Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University , Huntington, West Virginia
| | - Emine C Koc
- 1 Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University , Huntington, West Virginia
| | - Vincent E Sollars
- 1 Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University , Huntington, West Virginia
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Li Z, Chen B, Wang P, Li X, Cai G, Wei W, Dong W. A proteomic analysis of acute leukemia cells treated with 9-hydroxyoctadecadienoic acid. Lipids Health Dis 2016; 15:192. [PMID: 27832777 PMCID: PMC5105288 DOI: 10.1186/s12944-016-0359-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 11/01/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND 9s-hydroxy-octadecadienoic acid (9S-HOD), one of the natural products of linoleic acid oxygenation by 15-lipoxygenase (15-LOX), has been found to have anti-tumor properties in vitro and in vivo. The present study therefore investigated whether 9S-HOD affects acute leukemia HL-60 cells. METHODS The cytotoxicity of 9S-HOD in HL-60 with or without the presence of fetal bovine serum (FBS) in the culture media was tested using cell viability assays and flow cytometry. To explore the mechanism of its anti-tumor activity by 9S-HOD, we used a proteomic analysis to identify HL-60 cells protein profiles, based on two-dimensional gel electrophoresis (2-DE) and mass spectrometry (MS) identification. RESULTS 9S-HOD exerted cytotoxicity efficacy and induced apoptosis in HL-60 cells, and the cytotoxicity was largely attenuated by the presence of FBS in culture media. The proteomic results revealed that 9S-HOD remarkably altered the abundance of 23 proteins that were involved in mRNA metabolic process, protein binding, DNA replication and apoptosis. CONCLUSIONS Our results indicated that 9S-HOD exerts cytotoxicity in HL-60 cells by affecting several pathways.
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Affiliation(s)
- Zhen Li
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong Province, 510515, People's Republic of China
| | - Bohong Chen
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong Province, 510515, People's Republic of China
| | - Ping Wang
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong Province, 510515, People's Republic of China
| | - Xin Li
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong Province, 510515, People's Republic of China
| | - Gaotai Cai
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong Province, 510515, People's Republic of China
| | - Wei Wei
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong Province, 510515, People's Republic of China
| | - Wenqi Dong
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong Province, 510515, People's Republic of China.
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Wu Y, Cruz LN, Szestak T, Laing G, Molyneux GR, Garcia CRS, Craig AG. An external sensing system in Plasmodium falciparum-infected erythrocytes. Malar J 2016; 15:103. [PMID: 26893139 PMCID: PMC4759932 DOI: 10.1186/s12936-016-1144-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 02/04/2016] [Indexed: 11/17/2022] Open
Abstract
Background A number of experiments have previously indicated that Plasmodium falciparum-infected erythrocytes (pRBC) were able to sense host environment. The basis of this ability to detect external cues is not known but in screening signalling molecules from pRBC using commercial antibodies, a 34 kDa phosphorylated molecule that possesses such ability was identified. Methods The pRBC were exposed to different culture conditions and proteins were extracted for 1D or 2D gel electrophoresis followed by Western blot. The localization of 34 kDa protein was examined by biochemical fractionation followed by Western blot. High-resolution mass spectrometric analysis of immune precipitants was used to identify this protein and real-time quantitative reverse transcriptase polymerase chain reaction was used for detecting mRNA expression level. Results The 34 kDa protein was called PfAB4 has immediate responses (dephosphorylation and rapid turnover) to host environmental stimuli such as serum depletion, osmolality change and cytokine addition. PfAB4 is expressed constitutively throughout the erythrocytic lifecycle with dominant expression in trophozoites 30 h post-infection. Tumour necrosis factor (TNF) treatment induced a transient detectable dephosphorylation of PfAB4 in the ItG strain (2 min after addition) and the level of expression and phosphorylation returned to normal within 1–2 h. PfAB4 localized dominantly in pRBC cytoplasm, with a transient shift to the nucleus under TNF stimulation as shown by biochemical fractionation. High-resolution mass spectrometric analysis of immune precipitants of AB4 antibodies revealed a 34 kDa PfAB4 component as a mixture of proliferating cellular nuclear antigen-1 (PCNA1) and exported protein-2 (EXP2), along with a small number of other inconsistently identified peptides. Different parasite strains have different PfAB4 expression levels, but no significant association between mRNA and PfAB4 levels was seen, indicating that the differences may be at the post-transcriptional, presumably phosphorylation, level. A triple serine phosphorylated PCNA1 peptide was identified from the PfAB4 high expression strain only, providing further evidence that the identity of PfAB4 is PCNA1 in P.falciparum. Conclusion A protein element in the human malaria parasite that responds to external cues, including the pro-inflammatory cytokine TNF have been discovered. Treatment results in a transient change in phosphorylation status of the response element, which also migrates from the parasite cytoplasm to the nucleus. The response element has been identified as PfPCNA1. This sensing response could be regulated by a parasite checkpoint system and be analogous to bacterial two-component signal transduction systems. Electronic supplementary material The online version of this article (doi:10.1186/s12936-016-1144-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yang Wu
- Department of Parasitology, Liverpool School of Tropical Medicine, Liverpool, UK.
| | - Laura N Cruz
- Department of Physiology, Instituto de Biociências, Universidade de São Paulo, São Paulo, São Paulo, Brazil.
| | - Tadge Szestak
- Department of Parasitology, Liverpool School of Tropical Medicine, Liverpool, UK.
| | - Gavin Laing
- Department of Parasitology, Liverpool School of Tropical Medicine, Liverpool, UK.
| | - Gemma R Molyneux
- Department of Parasitology, Liverpool School of Tropical Medicine, Liverpool, UK.
| | - Celia R S Garcia
- Department of Physiology, Instituto de Biociências, Universidade de São Paulo, São Paulo, São Paulo, Brazil.
| | - Alister G Craig
- Department of Parasitology, Liverpool School of Tropical Medicine, Liverpool, UK.
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Abstract
Heat shock protein 90 (Hsp90) is a highly expressed chaperone that modulates the function and stability of hundreds of cellular client proteins. In this capacity, Hsp90 impacts human health in myriad ways and it is accordingly a high-interest molecular target in the oncology setting. This interest has led to a large number of clinical trials to evaluate the potential benefit of Hsp90 inhibitors in cancer treatment and, more recently, in combination with chemotherapeutic agents. Although these studies are still ongoing, some issues have arisen, such as toxicity effects associated with administration of these agents. We and others have identified a novel role for Hsp90 outside of cancer cells. This extracellular Hsp90 (eHsp90) was shown to be critical for the regulation of tumor invasiveness and metastasis, central processes associated with cancer lethality. Since these initial papers, a considerable cohort of studies has expanded upon this role, implicating eHsp90 in the activation of a number of proteins that support tumor cell invasion. As eHsp90 is preferentially detected on the surface of tumor cells, and within their surrounding microenvironment, it is possible that drugs capable of selectively targeting eHsp90 may exploit this differential expression. This selectivity may, in turn, enable treatment regimens with reduced target-related toxicity. This review will focus on our current understanding of eHsp90, particularly in cancer, and we will discuss the relevance of eHsp90 as a biomarker for invasive cancer and its potential as a drug target.
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Affiliation(s)
- Daniel Senh Wong
- Graduate Program in Cellular and Molecular Physiology, Sackler School of Graduate Biomedical Sciences, Tufts University, Boston, Massachusetts, USA
| | - Daniel G Jay
- Department of Developmental, Molecular, and Chemical Biology, School of Medicine, Tufts University, Boston, Massachusetts, USA.
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9
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Pennisi R, Ascenzi P, di Masi A. Hsp90: A New Player in DNA Repair? Biomolecules 2015; 5:2589-618. [PMID: 26501335 PMCID: PMC4693249 DOI: 10.3390/biom5042589] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 09/08/2015] [Accepted: 09/10/2015] [Indexed: 12/21/2022] Open
Abstract
Heat shock protein 90 (Hsp90) is an evolutionary conserved molecular chaperone that, together with Hsp70 and co-chaperones makes up the Hsp90 chaperone machinery, stabilizing and activating more than 200 proteins, involved in protein homeostasis (i.e., proteostasis), transcriptional regulation, chromatin remodeling, and DNA repair. Cells respond to DNA damage by activating complex DNA damage response (DDR) pathways that include: (i) cell cycle arrest; (ii) transcriptional and post-translational activation of a subset of genes, including those associated with DNA repair; and (iii) triggering of programmed cell death. The efficacy of the DDR pathways is influenced by the nuclear levels of DNA repair proteins, which are regulated by balancing between protein synthesis and degradation as well as by nuclear import and export. The inability to respond properly to either DNA damage or to DNA repair leads to genetic instability, which in turn may enhance the rate of cancer development. Multiple components of the DNA double strand breaks repair machinery, including BRCA1, BRCA2, CHK1, DNA-PKcs, FANCA, and the MRE11/RAD50/NBN complex, have been described to be client proteins of Hsp90, which acts as a regulator of the diverse DDR pathways. Inhibition of Hsp90 actions leads to the altered localization and stabilization of DDR proteins after DNA damage and may represent a cell-specific and tumor-selective radiosensibilizer. Here, the role of Hsp90-dependent molecular mechanisms involved in cancer onset and in the maintenance of the genome integrity is discussed and highlighted.
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Affiliation(s)
- Rosa Pennisi
- Department of Sciences, Roma Tre University, Viale Guglielmo Marconi 446, Roma I-00146, Italy.
| | - Paolo Ascenzi
- Department of Sciences, Roma Tre University, Viale Guglielmo Marconi 446, Roma I-00146, Italy.
- Istituto Nazionale di Biostrutture e Biosistemi, Viale Medaglie d'Oro 305, Roma I-00136, Italy.
| | - Alessandra di Masi
- Department of Sciences, Roma Tre University, Viale Guglielmo Marconi 446, Roma I-00146, Italy.
- Istituto Nazionale di Biostrutture e Biosistemi, Viale Medaglie d'Oro 305, Roma I-00136, Italy.
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Sawarkar R, Paro R. Hsp90@chromatin.nucleus: an emerging hub of a networker. Trends Cell Biol 2013; 23:193-201. [DOI: 10.1016/j.tcb.2012.11.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 11/19/2012] [Accepted: 11/20/2012] [Indexed: 02/06/2023]
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11
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Che Y, Best OG, Zhong L, Kaufman KL, Mactier S, Raftery M, Graves LM, Mulligan SP, Christopherson RI. Hsp90 Inhibitor SNX-7081 Dysregulates Proteins Involved with DNA Repair and Replication and the Cell Cycle in Human Chronic Lymphocytic Leukemia (CLL) Cells. J Proteome Res 2013; 12:1710-22. [DOI: 10.1021/pr301055y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yiping Che
- Cancer Proteomics Laboratory,
School of Molecular Bioscience, University of Sydney, Sydney, NSW 2006, Australia
| | - O. Giles Best
- Northern Blood Research Centre,
Kolling Institute for Medical Research, Royal North Shore Hospital, St Leonards, NSW 2065, Australia
| | - Ling Zhong
- Bioanalytical Mass Spectrometry
Facility, University of New South Wales, Kensington, NSW 2052, Australia
| | - Kimberley L. Kaufman
- Cancer Proteomics Laboratory,
School of Molecular Bioscience, University of Sydney, Sydney, NSW 2006, Australia
| | - Swetlana Mactier
- Cancer Proteomics Laboratory,
School of Molecular Bioscience, University of Sydney, Sydney, NSW 2006, Australia
| | - Mark Raftery
- Bioanalytical Mass Spectrometry
Facility, University of New South Wales, Kensington, NSW 2052, Australia
| | - Lee M. Graves
- Department of Pharmacology, University of North Carolina, Chapel Hill, North Carolina
27599-7365, United States
| | - Stephen P. Mulligan
- Northern Blood Research Centre,
Kolling Institute for Medical Research, Royal North Shore Hospital, St Leonards, NSW 2065, Australia
| | - Richard I. Christopherson
- Cancer Proteomics Laboratory,
School of Molecular Bioscience, University of Sydney, Sydney, NSW 2006, Australia
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12
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Li W, Tsen F, Sahu D, Bhatia A, Chen M, Multhoff G, Woodley DT. Extracellular Hsp90 (eHsp90) as the actual target in clinical trials: intentionally or unintentionally. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2013; 303:203-35. [PMID: 23445811 DOI: 10.1016/b978-0-12-407697-6.00005-2] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Despite extensive investigative studies and clinical trials over the past two decades, we still do not understand why cancer cells are more sensitive to the cellular toxicity of Hsp90 inhibitors than normal cells. We still do not understand why only some cancer cells are sensitive to the Hsp90 inhibitors. Based on studies of the past few years, we argue that the selected sensitivity of cancer cells to Hsp90 inhibitors, such as 17-N-allylamino-17-demethoxygeldanamycin, is due to inhibition of the extracellular Hsp90 (eHsp90) rather than intracellular Hsp90 by these inhibitors. Because not all tumor cells utilize eHsp90 for motility, invasion and metastasis, only the group of "eHsp90-dependent" cancer cells is sensitive to Hsp90 inhibitors. If these notions prove to be true, pharmaceutical agents that selectively target eHsp90 should be more effective on tumor cells and less toxic on normal cells than current inhibitors that nondiscriminatively target both extracellular and intracellular Hsp90.
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Affiliation(s)
- Wei Li
- Department of Dermatology, USC-Norris Comprehensive Cancer Center, University of Southern California, Keck School of Medicine, Los Angeles, CA, USA.
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13
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An interaction network predicted from public data as a discovery tool: application to the Hsp90 molecular chaperone machine. PLoS One 2011; 6:e26044. [PMID: 22022502 PMCID: PMC3195953 DOI: 10.1371/journal.pone.0026044] [Citation(s) in RCA: 166] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Accepted: 09/16/2011] [Indexed: 11/19/2022] Open
Abstract
Understanding the functions of proteins requires information about their protein-protein interactions (PPI). The collective effort of the scientific community generates far more data on any given protein than individual experimental approaches. The latter are often too limited to reveal an interactome comprehensively. We developed a workflow for parallel mining of all major PPI databases, containing data from several model organisms, and to integrate data from the literature for a protein of interest. We applied this novel approach to build the PPI network of the human Hsp90 molecular chaperone machine (Hsp90Int) for which previous efforts have yielded limited and poorly overlapping sets of interactors. We demonstrate the power of the Hsp90Int database as a discovery tool by validating the prediction that the Hsp90 co-chaperone Aha1 is involved in nucleocytoplasmic transport. Thus, we both describe how to build a custom database and introduce a powerful new resource for the scientific community.
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14
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Li W, Sahu D, Tsen F. Secreted heat shock protein-90 (Hsp90) in wound healing and cancer. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2011; 1823:730-41. [PMID: 21982864 DOI: 10.1016/j.bbamcr.2011.09.009] [Citation(s) in RCA: 136] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 09/16/2011] [Accepted: 09/20/2011] [Indexed: 12/15/2022]
Abstract
Extracellular Hsp90 proteins, including "membrane-bound", "released" and "secreted", were first reported more than two decades ago. Only studies of the past 7years have begun to reveal a picture for when, how and why Hsp90 gets exported by both normal and tumor cells. Normal cells secrete Hsp90 in response to tissue injury. Tumor cells have managed to constitutively secrete Hsp90 for tissue invasion. In either case, sufficient supply of the extracellular Hsp90 can be guaranteed by its unusually abundant storage inside the cells. A well-characterized function of secreted Hsp90α is to promote cell motility, a crucial event for both wound healing and cancer. The reported targets for extracellular Hsp90α include MMP2, LRP-1, tyrosine kinase receptors and possibly more. The pro-motility activity of secreted Hsp90α resides within a fragment, called 'F-5', at the boundary between linker region and middle domain. Inhibition of its secretion, neutralization of its extracellular action or interruption of its signaling through LRP-1 block wound healing and tumor invasion in vitro and in vivo. In normal tissue, topical application of F-5 promotes acute and diabetic wound healing far more effectively than US FDA-approved conventional growth factor therapy in mice. In cancer, drugs that selectively target the F-5 region of secreted Hsp90 by cancer cells may be more effective and less toxic than those that target the ATPase of the intracellular Hsp90. This article is part of a Special Issue entitled: Heat Shock Protein 90 (HSP90).
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Affiliation(s)
- Wei Li
- The Department of Dermatology, the University of Southern California, Los Angeles, CA, USA.
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Hartson SD, Matts RL. Approaches for defining the Hsp90-dependent proteome. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2011; 1823:656-67. [PMID: 21906632 DOI: 10.1016/j.bbamcr.2011.08.013] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Revised: 08/22/2011] [Accepted: 08/23/2011] [Indexed: 10/17/2022]
Abstract
Hsp90 is the target of ongoing drug discovery studies seeking new compounds to treat cancer, neurodegenerative diseases, and protein folding disorders. To better understand Hsp90's roles in cellular pathologies and in normal cells, numerous studies have utilized proteomics assays and related high-throughput tools to characterize its physical and functional protein partnerships. This review surveys these studies, and summarizes the strengths and limitations of the individual attacks. We also include downloadable spreadsheets compiling all of the Hsp90-interacting proteins identified in more than 23 studies. These tools include cross-references among gene aliases, human homologues of yeast Hsp90-interacting proteins, hyperlinks to database entries, summaries of canonical pathways that are enriched in the Hsp90 interactome, and additional bioinformatic annotations. In addition to summarizing Hsp90 proteomics studies performed to date and the insights they have provided, we identify gaps in our current understanding of Hsp90-mediated proteostasis. This article is part of a Special Issue entitled: Heat Shock Protein 90 (HSP90).
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Affiliation(s)
- Steven D Hartson
- Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK, USA
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