1
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Kizilboga T, Özden C, Can ND, Onay Ucar E, Dinler Doganay G. Bag-1-mediated HSF1 phosphorylation regulates expression of heat shock proteins in breast cancer cells. FEBS Open Bio 2024. [PMID: 39049197 DOI: 10.1002/2211-5463.13843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 03/20/2024] [Accepted: 05/29/2024] [Indexed: 07/27/2024] Open
Abstract
According to the World Health Organization in 2022, 2.3 million women were diagnosed with breast cancer. Investigating the interaction networks between Bcl-2-associated athanogene (Bag)-1 and other chaperone proteins may further the current understanding of the regulation of protein homeostasis in breast cancer cells and contribute to the development of treatment options. The present study aimed to determine the interactions between Bag-1 and heat shock proteins (HSPs); namely, HSP90, HSP70 and HSP27, to elucidate their role in promoting heat shock factor-1 (HSF1)-dependent survival of breast cancer cells. HER2-negative (MCF-7) and HER2-positive (BT-474) cell lines were used to examine the impact of Bag-1 expression on HSF1 and HSPs. We demonstrated that Bag-1 overexpression promoted HER2 expression in breast cancer cells, thereby resulting in the concurrent constitutive activation of the HSF1-HSP axis. The activation of HSP results in the stabilization of several tumor-promoting HSP clients such as AKT, mTOR and HSF1 itself, which substantially accelerates tumor development. Our results suggest that Bag-1 can modulate the chaperone activity of HSPs, such as HSP27, by directly or indirectly regulating the phosphorylation of HSF1. This modulation of chaperone activity can influence the activation of genes involved in cellular homeostasis, thereby protecting cells against stress.
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Affiliation(s)
- Tugba Kizilboga
- Department of Molecular Biology and Genetics, Istanbul Technical University, Turkey
- Department of Molecular Biology and Genetics, Institute of Graduate Studies in Sciences, Istanbul University, Turkey
| | - Can Özden
- Department of Molecular Biology and Genetics, Istanbul Technical University, Turkey
| | - Nisan Denizce Can
- Department of Molecular Biology and Genetics, Istanbul Technical University, Turkey
| | - Evren Onay Ucar
- Department of Molecular Biology and Genetics, Faculty of Sciences, Istanbul University, Turkey
| | - Gizem Dinler Doganay
- Department of Molecular Biology and Genetics, Istanbul Technical University, Turkey
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2
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Zhang M, Bi X. Heat Shock Proteins and Breast Cancer. Int J Mol Sci 2024; 25:876. [PMID: 38255948 PMCID: PMC10815085 DOI: 10.3390/ijms25020876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/01/2024] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
Heat shock proteins (Hsps) are a group of stress-induced proteins involved in protein folding and maturation. Based on their molecular weight, Hsps can be divided into six families: small Hsps, Hsp40, Hsp60, Hsp70, Hsp90, and large Hsps. In the process of breast cancer tumorigenesis, Hsps play a central role in regulating cell reactions and functions including proliferation, metastasis, and apoptosis. Moreover, some of the critical Hsps also regulate the fine balance between the protective and destructive immunological responses within the tumor microenvironment. In this review, we systematically summarize the roles of major Hsps in breast cancer biology and point out the potential uses of these proteins in breast cancer diagnosis and therapy. Understanding the roles of different families of Hsps in breast cancer pathogenesis will help in the development of more effective prevention and treatment measures for breast cancer.
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Affiliation(s)
- Miao Zhang
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang 330006, China;
- Institute of Microbiology, Jiangxi Academy of Sciences, Nanchang 330096, China
| | - Xiaowen Bi
- Department of Medical Genetics and Cell Biology, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang 330006, China;
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3
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Saraswati SSK, Rana AK, Singh A, Anang V, Singh A, Natarajan K. HSP-27 and HSP-70 negatively regulate protective defence responses from macrophages during mycobacterial infection. Microbes Infect 2023; 25:105126. [PMID: 36931492 DOI: 10.1016/j.micinf.2023.105126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 02/23/2023] [Accepted: 03/09/2023] [Indexed: 03/17/2023]
Abstract
Mycobacterium tuberculosis attenuates many defence responses from alveolar macrophages to create a niche at sites of infection in the human lung. Levels of Heat Shock Proteins have been reported to increase many folds in the serum of active TB patients than in latently infected individuals. Here we investigated the regulation of key defence responses by HSPs during mycobacterial infection. We show that infection of macrophages with M. bovis BCG induces higher expression of HSP-27 and HSP-70. Inhibiting HSP-27 and HSP-70 prior to mycobacterial infection leads to a significant decrease in mycobacterial growth inside macrophages. Further, inhibiting HSPs resulted in a significant increase in intracellular oxidative burst levels. This was accompanied by an increase in the levels of T cell activation molecules CD40 and IL-12 receptor and a concomitant decrease in the levels of T cell inhibitory molecules PD-L1 and IL-10 receptor. Furthermore, inhibiting HSPs significantly increased the expression of key proteins in the autophagy pathway along with increased activation of pro-inflammatory promoting transcription factors NF-κB and p-CREB. Interestingly, we also show that both HSP-27 and HSP-70 are associated with anti-apoptotic proteins Bcl-2 and Beclin-1. These results point towards a suppressive role for host HSP-27 and HSP-70 during mycobacterial infection.
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Affiliation(s)
| | - Ankush Kumar Rana
- Infectious Disease Immunology Laboratory, Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India
| | - Aayushi Singh
- Infectious Disease Immunology Laboratory, Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India
| | - Vandana Anang
- Infectious Disease Immunology Laboratory, Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India
| | - Aarti Singh
- Infectious Disease Immunology Laboratory, Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India
| | - Krishnamurthy Natarajan
- Infectious Disease Immunology Laboratory, Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India.
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4
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CircRNA-ST6GALNAC6 increases the sensitivity of bladder cancer cells to erastin-induced ferroptosis by regulating the HSPB1/P38 axis. J Transl Med 2022; 102:1323-1334. [PMID: 35945269 DOI: 10.1038/s41374-022-00826-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 06/08/2022] [Accepted: 07/04/2022] [Indexed: 11/08/2022] Open
Abstract
Previous studies have demonstrated that circST6GALNAC6 is a tumor suppressor in bladder cancer. However, the role of circST6GALNAC6 in ferroptosis remains unclear. In the current study, ferroptosis was induced in bladder cancer cells by erastin. Functional experiments showed that overexpression of circST6GALNAC6 promoted ferroptosis of bladder cancer cells in vitro and in vivo. Mechanistic studies revealed that circST6GALNAC6 bound to the N-terminus of small heat shock protein 1 (HSPB1) and thus blocked the erastin-induced phosphorylation of HSPB1 at the Ser-15 site, a phosphorylation site in the protective response to ferroptosis stress. In addition, protein kinase C inhibited circST6GALNAC6-induced ferroptosis by increasing the overall phosphorylation level of HSPB1, further demonstrating the role of phosphorylation activation of HSPB1 in resistance to ferroptosis. Finally, the involvement of the HSPB1/p38 MAPK pathway in the downstream signal transduction of circST6GALNAC6 in bladder cancer ferroptosis regulation was determined. The regulatory mechanism of ferroptosis sensitivity dependent on circST6GALNAC6 expression levels in bladder cancer was revealed as circRNA regulation of various protein functions. CircST6GALNAC6 inhibits HSPB1 and promotes cell ferroptosis by occupying the phosphorylation site (Ser-15) of HSBP1 and activating the P38 MAPK signaling pathway. Therefore, enhancing the expression of circST6GALNAC6 to promote ferroptosis or using circST6GALNAC6 as a biomarker of ferroptosis sensitivity is of considerable importance to the development and application of ferroptosis intervention methods in bladder cancer.
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5
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Hu C, Yang J, Qi Z, Wu H, Wang B, Zou F, Mei H, Liu J, Wang W, Liu Q. Heat shock proteins: Biological functions, pathological roles, and therapeutic opportunities. MedComm (Beijing) 2022; 3:e161. [PMID: 35928554 PMCID: PMC9345296 DOI: 10.1002/mco2.161] [Citation(s) in RCA: 96] [Impact Index Per Article: 48.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 06/27/2022] [Accepted: 06/28/2022] [Indexed: 12/12/2022] Open
Abstract
The heat shock proteins (HSPs) are ubiquitous and conserved protein families in both prokaryotic and eukaryotic organisms, and they maintain cellular proteostasis and protect cells from stresses. HSP protein families are classified based on their molecular weights, mainly including large HSPs, HSP90, HSP70, HSP60, HSP40, and small HSPs. They function as molecular chaperons in cells and work as an integrated network, participating in the folding of newly synthesized polypeptides, refolding metastable proteins, protein complex assembly, dissociating protein aggregate dissociation, and the degradation of misfolded proteins. In addition to their chaperone functions, they also play important roles in cell signaling transduction, cell cycle, and apoptosis regulation. Therefore, malfunction of HSPs is related with many diseases, including cancers, neurodegeneration, and other diseases. In this review, we describe the current understandings about the molecular mechanisms of the major HSP families including HSP90/HSP70/HSP60/HSP110 and small HSPs, how the HSPs keep the protein proteostasis and response to stresses, and we also discuss their roles in diseases and the recent exploration of HSP related therapy and diagnosis to modulate diseases. These research advances offer new prospects of HSPs as potential targets for therapeutic intervention.
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Affiliation(s)
- Chen Hu
- Anhui Province Key Laboratory of Medical Physics and Technology Institute of Health and Medical Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei Anhui P. R. China.,Hefei Cancer Hospital Chinese Academy of Sciences Hefei Anhui P. R. China
| | - Jing Yang
- Anhui Province Key Laboratory of Medical Physics and Technology Institute of Health and Medical Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei Anhui P. R. China.,Hefei Cancer Hospital Chinese Academy of Sciences Hefei Anhui P. R. China
| | - Ziping Qi
- Anhui Province Key Laboratory of Medical Physics and Technology Institute of Health and Medical Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei Anhui P. R. China.,Hefei Cancer Hospital Chinese Academy of Sciences Hefei Anhui P. R. China
| | - Hong Wu
- Anhui Province Key Laboratory of Medical Physics and Technology Institute of Health and Medical Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei Anhui P. R. China.,Hefei Cancer Hospital Chinese Academy of Sciences Hefei Anhui P. R. China
| | - Beilei Wang
- Anhui Province Key Laboratory of Medical Physics and Technology Institute of Health and Medical Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei Anhui P. R. China.,Hefei Cancer Hospital Chinese Academy of Sciences Hefei Anhui P. R. China
| | - Fengming Zou
- Anhui Province Key Laboratory of Medical Physics and Technology Institute of Health and Medical Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei Anhui P. R. China.,Hefei Cancer Hospital Chinese Academy of Sciences Hefei Anhui P. R. China
| | - Husheng Mei
- Anhui Province Key Laboratory of Medical Physics and Technology Institute of Health and Medical Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei Anhui P. R. China.,University of Science and Technology of China Hefei Anhui P. R. China
| | - Jing Liu
- Anhui Province Key Laboratory of Medical Physics and Technology Institute of Health and Medical Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei Anhui P. R. China.,Hefei Cancer Hospital Chinese Academy of Sciences Hefei Anhui P. R. China.,University of Science and Technology of China Hefei Anhui P. R. China
| | - Wenchao Wang
- Anhui Province Key Laboratory of Medical Physics and Technology Institute of Health and Medical Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei Anhui P. R. China.,Hefei Cancer Hospital Chinese Academy of Sciences Hefei Anhui P. R. China.,University of Science and Technology of China Hefei Anhui P. R. China
| | - Qingsong Liu
- Anhui Province Key Laboratory of Medical Physics and Technology Institute of Health and Medical Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei Anhui P. R. China.,Hefei Cancer Hospital Chinese Academy of Sciences Hefei Anhui P. R. China.,University of Science and Technology of China Hefei Anhui P. R. China.,Precision Medicine Research Laboratory of Anhui Province Hefei Anhui P. R. China
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6
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Neo SP, Alli-Shaik A, Wee S, Lim Z, Gunaratne J. Englerin A Rewires Phosphosignaling via Hsp27 Hyperphosphorylation to Induce Cytotoxicity in Renal Cancer Cells. J Proteome Res 2022; 21:1948-1960. [PMID: 35838755 DOI: 10.1021/acs.jproteome.2c00248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Englerin A (EA) is a small-molecule natural product with selective cytotoxicity against renal cancer cells. EA has been shown to induce apoptosis and cell death through cell-cycle arrest and/or insulin signaling pathways. However, its biological mode of action or targets in renal cancer remains enigmatic. In this study, we employed advanced mass spectrometry-based phosphoproteomics approaches to identify EA's functional roles in renal cancer. We identified 10,940 phosphorylation sites, of which 706 sites exhibited EA-dependent phosphorylation changes. Integrated analysis of motifs and interaction networks suggested activation of stress-activated kinases including p38 upon EA treatment. Of note, a downstream target of p38, Hsp27, was found to be hyperphosphorylated on multiple sites upon EA treatment. Among these, a novel site Ser65 on Hsp27, which was further validated by targeted proteomics, was shown to be crucial for EA-induced cytotoxicity in renal cancer cells. Taken together, these data reveal the complex signaling cascade that is induced upon EA treatment and importantly provide insights into its effects on downstream molecular signaling.
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Affiliation(s)
- Suat Peng Neo
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, 61 Biopolis Drive, Singapore 138673, Singapore
| | - Asfa Alli-Shaik
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, 61 Biopolis Drive, Singapore 138673, Singapore
| | - Sheena Wee
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, 61 Biopolis Drive, Singapore 138673, Singapore
| | - Zijie Lim
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, 61 Biopolis Drive, Singapore 138673, Singapore
| | - Jayantha Gunaratne
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, 61 Biopolis Drive, Singapore 138673, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, 10 Medical Dr, Singapore 117597, Singapore
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7
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Alberti G, Vergilio G, Paladino L, Barone R, Cappello F, Conway de Macario E, Macario AJL, Bucchieri F, Rappa F. The Chaperone System in Breast Cancer: Roles and Therapeutic Prospects of the Molecular Chaperones Hsp27, Hsp60, Hsp70, and Hsp90. Int J Mol Sci 2022; 23:ijms23147792. [PMID: 35887137 PMCID: PMC9324353 DOI: 10.3390/ijms23147792] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 06/30/2022] [Accepted: 07/10/2022] [Indexed: 12/26/2022] Open
Abstract
Breast cancer (BC) is a major public health problem, with key pieces of information needed for developing preventive and curative measures still missing. For example, the participation of the chaperone system (CS) in carcinogenesis and anti-cancer responses is poorly understood, although it can be predicted to be a crucial factor in these mechanisms. The chief components of the CS are the molecular chaperones, and here we discuss four of them, Hsp27, Hsp60, Hsp70, and Hsp90, focusing on their pro-carcinogenic roles in BC and potential for developing anti-BC therapies. These chaperones can be targets of negative chaperonotherapy, namely the elimination/blocking/inhibition of the chaperone(s) functioning in favor of BC, using, for instance, Hsp inhibitors. The chaperones can also be employed in immunotherapy against BC as adjuvants, together with BC antigens. Extracellular vesicles (EVs) in BC diagnosis and management are also briefly discussed, considering their potential as easily accessible carriers of biomarkers and as shippers of anti-cancer agents amenable to manipulation and controlled delivery. The data surveyed from many laboratories reveal that, to enhance the understanding of the role of the CS in BS pathogenesis, one must consider the CS as a physiological system, encompassing diverse members throughout the body and interacting with the ubiquitin–proteasome system, the chaperone-mediated autophagy machinery, and the immune system (IS). An integrated view of the CS, including its functional partners and considering its highly dynamic nature with EVs transporting CS components to reach all the cell compartments in which they are needed, opens as yet unexplored pathways leading to carcinogenesis that are amenable to interference by anti-cancer treatments centered on CS components, such as the molecular chaperones.
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Affiliation(s)
- Giusi Alberti
- Department of Biomedicine, Neurosciences and Advanced Diagnostics (BiND), University of Palermo, 90127 Palermo, Italy; (G.A.); (G.V.); (R.B.); (F.C.); (F.B.); (F.R.)
| | - Giuseppe Vergilio
- Department of Biomedicine, Neurosciences and Advanced Diagnostics (BiND), University of Palermo, 90127 Palermo, Italy; (G.A.); (G.V.); (R.B.); (F.C.); (F.B.); (F.R.)
- Euro-Mediterranean Institute of Science and Technology (IEMEST), 90139 Palermo, Italy;
| | - Letizia Paladino
- Department of Biomedicine, Neurosciences and Advanced Diagnostics (BiND), University of Palermo, 90127 Palermo, Italy; (G.A.); (G.V.); (R.B.); (F.C.); (F.B.); (F.R.)
- Euro-Mediterranean Institute of Science and Technology (IEMEST), 90139 Palermo, Italy;
- Correspondence:
| | - Rosario Barone
- Department of Biomedicine, Neurosciences and Advanced Diagnostics (BiND), University of Palermo, 90127 Palermo, Italy; (G.A.); (G.V.); (R.B.); (F.C.); (F.B.); (F.R.)
| | - Francesco Cappello
- Department of Biomedicine, Neurosciences and Advanced Diagnostics (BiND), University of Palermo, 90127 Palermo, Italy; (G.A.); (G.V.); (R.B.); (F.C.); (F.B.); (F.R.)
- Euro-Mediterranean Institute of Science and Technology (IEMEST), 90139 Palermo, Italy;
| | - Everly Conway de Macario
- Department of Microbiology and Immunology, School of Medicine, University of Maryland at Baltimore-Institute of Marine and Environmental Technology (IMET), Baltimore, MD 21202, USA;
| | - Alberto J. L. Macario
- Euro-Mediterranean Institute of Science and Technology (IEMEST), 90139 Palermo, Italy;
- Department of Microbiology and Immunology, School of Medicine, University of Maryland at Baltimore-Institute of Marine and Environmental Technology (IMET), Baltimore, MD 21202, USA;
| | - Fabio Bucchieri
- Department of Biomedicine, Neurosciences and Advanced Diagnostics (BiND), University of Palermo, 90127 Palermo, Italy; (G.A.); (G.V.); (R.B.); (F.C.); (F.B.); (F.R.)
| | - Francesca Rappa
- Department of Biomedicine, Neurosciences and Advanced Diagnostics (BiND), University of Palermo, 90127 Palermo, Italy; (G.A.); (G.V.); (R.B.); (F.C.); (F.B.); (F.R.)
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8
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Jaragh-Alhadad LA, Ali MS. Methoxybenzamide derivative of nimesulide from anti-fever to anti-cancer: chemical characterization and cytotoxicity. Saudi Pharm J 2022; 30:485-493. [PMID: 35693435 PMCID: PMC9177461 DOI: 10.1016/j.jsps.2022.03.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 03/05/2022] [Indexed: 12/31/2022] Open
Abstract
The repurposing strategy of converting nimesulide from an anti-fever drug to an anti-cancer agent by modifying its main structure targeting HSP27 is gaining great attention these days. The goal of this study focuses on synthesizing a new nimesulide derivative with new ligands that have biological anti-cancer activities in different cancer models using the in-vitro assay. Nimesulide derivative L1 was synthesized, characterized by 1H NMR, 13C NMR, FTIR, melting point, mass spectra, and TGA analysis. A single crystal was diffracted and showed colorless block group P-1. The results revealed that L1 demonstrates potent anti-cancer activity with lung (H292), ovarian (SKOV3), and breast (SKBR3) cancer cell lines in-vitro models with IC50 values below 8.8 µM.
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Ju H, Hu Z, Wei D, Huang J, Zhang X, Rui M, Li Z, Zhang X, Hu J, Guo W, Ren G. A novel intronic circular RNA, circGNG7, inhibits head and neck squamous cell carcinoma progression by blocking the phosphorylation of heat shock protein 27 at Ser78 and Ser82. Cancer Commun (Lond) 2021; 41:1152-1172. [PMID: 34498800 PMCID: PMC8626595 DOI: 10.1002/cac2.12213] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 07/02/2021] [Accepted: 08/31/2021] [Indexed: 01/11/2023] Open
Abstract
Background There is increasing evidence that circular RNAs (circRNAs) play a significant role in pathological processes including tumorigenesis. In contrast to exonic circRNAs, which are the most frequently reported circRNAs in cancer so far, the studies of intronic circRNAs have been greatly lagged behind. Here, we aimed to investigate the regulatory role of intronic circRNAs in head and neck squamous cell carcinoma (HNSCC). Methods We conducted whole‐transcriptome sequencing with four pairs of primary tumor tissues and adjacent normal tissues from HNSCC patients. Then, we characterized circGNG7 expression in HNSCC tissues and cell lines and explored its association with the prognosis of HNSCC patients. We also identified interactions between circGNG7 and functional proteins, which alter downstream signaling that regulate HNSCC progression. Results In this study, we identified a new intronic circRNA, circGNG7, and validated its functional roles in HNSCC progression. CircGNG7 was predominately localized to the cytoplasm, and its expression was downregulated in both HNSCC tissues andCAL27, CAL33, SCC4, SCC9, HN6, and HN30 cells. Low expression of circGNG7 was significantly correlated with poor prognosis in HNSCC patients. Consistent with this finding, overexpression of circGNG7 strongly inhibited tumor cell proliferation, colony formation, in vitro migration, and in vivo tumor growth. Mechanistically, the expression of circGNG7 in HNSCC cells was regulated by the transcription factor SMAD family member 4 (SMAD4). Importantly, we discovered that circGNG7 could bind to serine residues 78 and 82 of the functional heat shock protein 27 (HSP27), occupying its phosphorylation sites and hindering its phosphorylation, which reduced HSP27‐JNK/P38 mitogen‐activated protein kinase (MAPK) oncogenic signaling. Downregulation of circGNG7 expression in HNSCC increased HSP27‐JNK/P38 MAPK signaling and promoted tumor progression. Conclusions Our results revealed that a new intronic circRNA, circGNG7, functions as a strong tumor suppressor and that circGNG7/HSP27‐JNK/P38 MAPK signaling is a novel mechanism by which HNSCC progression can be controlled.
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Affiliation(s)
- Houyu Ju
- Department of Oral Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, P. R. China.,Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center of Stomatology, Shanghai, 200011, P. R. China.,National Clinical Research Center of Stomatology, Shanghai, 200011, P. R. China
| | - Zhenrong Hu
- Department of Oral Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, P. R. China.,School of Stomatology, Weifang Medical University, Weifang, Shandong, 261053, P. R. China
| | - Dongliang Wei
- Department of Oral Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, P. R. China.,Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center of Stomatology, Shanghai, 200011, P. R. China.,National Clinical Research Center of Stomatology, Shanghai, 200011, P. R. China
| | - Jinyun Huang
- Department of Oral Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, P. R. China.,School of Stomatology, Weifang Medical University, Weifang, Shandong, 261053, P. R. China
| | - Xinyi Zhang
- Department of Oral Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, P. R. China.,School of Stomatology, Weifang Medical University, Weifang, Shandong, 261053, P. R. China
| | - Mengyu Rui
- Department of Oral Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, P. R. China.,Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center of Stomatology, Shanghai, 200011, P. R. China.,National Clinical Research Center of Stomatology, Shanghai, 200011, P. R. China
| | - Zhi Li
- Department of Oral Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, P. R. China.,School of Stomatology, Weifang Medical University, Weifang, Shandong, 261053, P. R. China
| | - Xiaomeng Zhang
- National Clinical Research Center of Stomatology, Shanghai, 200011, P. R. China.,Shanghai Key Laboratory of Stomatology, Department of Oral and Maxillo-facial Implantology, School of Medicine, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, Shanghai, 200011, P. R. China
| | - Jingzhou Hu
- Department of Oral Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, P. R. China.,Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center of Stomatology, Shanghai, 200011, P. R. China.,National Clinical Research Center of Stomatology, Shanghai, 200011, P. R. China
| | - Wei Guo
- Department of Oral Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, P. R. China.,Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center of Stomatology, Shanghai, 200011, P. R. China.,National Clinical Research Center of Stomatology, Shanghai, 200011, P. R. China
| | - Guoxin Ren
- Department of Oral Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, P. R. China.,Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center of Stomatology, Shanghai, 200011, P. R. China.,National Clinical Research Center of Stomatology, Shanghai, 200011, P. R. China
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10
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Buttacavoli M, Di Cara G, D’Amico C, Geraci F, Pucci-Minafra I, Feo S, Cancemi P. Prognostic and Functional Significant of Heat Shock Proteins (HSPs) in Breast Cancer Unveiled by Multi-Omics Approaches. BIOLOGY 2021; 10:biology10030247. [PMID: 33810095 PMCID: PMC8004706 DOI: 10.3390/biology10030247] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/13/2021] [Accepted: 03/18/2021] [Indexed: 12/16/2022]
Abstract
Simple Summary In this study, we investigated the expression pattern and prognostic significance of the heat shock proteins (HSPs) family members in breast cancer (BC) by using several bioinformatics tools and proteomics investigations. Our results demonstrated that, collectively, HSPs were deregulated in BC, acting as both oncogene and onco-suppressor genes. In particular, two different HSP-clusters were significantly associated with a poor or good prognosis. Interestingly, the HSPs deregulation impacted gene expression and miRNAs regulation that, in turn, affected important biological pathways involved in cell cycle, DNA replication, and receptors-mediated signaling. Finally, the proteomic identification of several HSPs members and isoforms revealed much more complexity of HSPs roles in BC and showed that their expression is quite variable among patients. In conclusion, we elaborated two panels of HSPs that could be further explored as potential biomarkers for BC progression and prognosis. Abstract Heat shock proteins (HSPs) are a well-characterized molecular chaperones protein family, classified into six major families, according to their molecular size. A wide range of tumors have been shown to express atypical levels of one or more HSPs, suggesting that they could be used as biomarkers. However, the collective role and the possible coordination of HSP members, as well as the prognostic significance and the functional implications of their deregulated expression in breast cancer (BC) are poorly investigated. Here, we used a systematic multi-omics approach to assess the HSPs expression, the prognostic value, and the underlying mechanisms of tumorigenesis in BC. By using data mining, we showed that several HSPs were deregulated in BC and significantly correlated with a poor or good prognosis. Functional network analysis of HSPs co-expressed genes and miRNAs highlighted their regulatory effects on several biological pathways involved in cancer progression. In particular, these pathways concerned cell cycle and DNA replication for the HSPs co-expressed genes, and miRNAs up-regulated in poor prognosis and Epithelial to Mesenchymal Transition (ETM), as well as receptors-mediated signaling for the HSPs co-expressed genes up-regulated in good prognosis. Furthermore, the proteomic expression of HSPs in a large sample-set of breast cancer tissues revealed much more complexity in their roles in BC and showed that their expression is quite variable among patients and confined into different cellular compartments. In conclusion, integrative analysis of multi-omics data revealed the distinct impact of several HSPs members in BC progression and indicate that collectively they could be useful as biomarkers and therapeutic targets for BC management.
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Affiliation(s)
- Miriam Buttacavoli
- Department of Biological Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, 90128 Palermo, Italy; (M.B.); (G.D.C.); (C.D.); (F.G.); (S.F.)
| | - Gianluca Di Cara
- Department of Biological Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, 90128 Palermo, Italy; (M.B.); (G.D.C.); (C.D.); (F.G.); (S.F.)
| | - Cesare D’Amico
- Department of Biological Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, 90128 Palermo, Italy; (M.B.); (G.D.C.); (C.D.); (F.G.); (S.F.)
| | - Fabiana Geraci
- Department of Biological Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, 90128 Palermo, Italy; (M.B.); (G.D.C.); (C.D.); (F.G.); (S.F.)
| | | | - Salvatore Feo
- Department of Biological Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, 90128 Palermo, Italy; (M.B.); (G.D.C.); (C.D.); (F.G.); (S.F.)
| | - Patrizia Cancemi
- Department of Biological Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, 90128 Palermo, Italy; (M.B.); (G.D.C.); (C.D.); (F.G.); (S.F.)
- Experimental Center of Onco Biology (COBS), 90145 Palermo, Italy;
- Correspondence: ; Tel.: +39-091-2389-7330
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Quinlan PR, Figeuredo G, Mongan N, Jordan LB, Bray SE, Sreseli R, Ashfield A, Mitsch J, van den Ijssel P, Thompson AM, Quinlan RA. Cluster analyses of the TCGA and a TMA dataset using the coexpression of HSP27 and CRYAB improves alignment with clinical-pathological parameters of breast cancer and suggests different epichaperome influences for each sHSP. Cell Stress Chaperones 2021; 27:177-188. [PMID: 35235182 PMCID: PMC8943080 DOI: 10.1007/s12192-022-01258-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 01/26/2022] [Accepted: 01/30/2022] [Indexed: 12/05/2022] Open
Abstract
Our cluster analysis of the Cancer Genome Atlas for co-expression of HSP27 and CRYAB in breast cancer patients identified three patient groups based on their expression level combination (high HSP27 + low CRYAB; low HSP27 + high CRYAB; similar HSP27 + CRYAB). Our analyses also suggest that there is a statistically significant inverse relationship between HSP27 and CRYAB and known clinicopathological markers in breast cancer. Screening an unbiased 248 breast cancer patient tissue microarray (TMA) for the protein expression of HSP27 and phosphorylated HSP27 (HSP27-82pS) with CRYAB also identified three patient groups based on HSP27 and CRYAB expression levels. TMA24 also had recorded clinical-pathological parameters, such as ER and PR receptor status, patient survival, and TP53 mutation status. High HSP27 protein levels were significant with ER and PR expression. HSP27-82pS associated with the best patient survival (Log Rank test). High CRYAB expression in combination with wild-type TP53 was significant for patient survival, but a different patient outcome was observed when mutant TP53 was combined with high CRYAB expression. Our data suggest that HSP27 and CRYAB have different epichaperome influences in breast cancer, but more importantly evidence the value of a cluster analysis that considers their coexpression. Our approach can deliver convergence for archival datasets as well as those from recent treatment and patient cohorts and can align HSP27 and CRYAB expression to important clinical-pathological features of breast cancer.
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Affiliation(s)
- Philip R Quinlan
- Digital Research Service, University of Nottingham, Nottingham, NG8 1BB, UK
- Dundee Cancer Centre, Ninewells Hospital and Medical School, Dundee, DD1 9SY, UK
- School of Medicine, University of Nottingham, Nottingham, NG7 2UH, UK
| | - Grazziela Figeuredo
- Digital Research Service, University of Nottingham, Nottingham, NG8 1BB, UK
- School of Computer Science, University of Nottingham, Nottingham, NG8 1BB, UK
| | - Nigel Mongan
- Faculty of Medicine and Health Sciences, Biodiscovery Institute University Park, Nottingham, NG7 2RD, UK
| | - Lee B Jordan
- Dundee Cancer Centre, Ninewells Hospital and Medical School, Dundee, DD1 9SY, UK
- NHS Tayside, Department of Pathology, Ninewells Hospital and Medical School, University of Dundee, Dundee, DD1 9SY, UK
| | - Susan E Bray
- Dundee Cancer Centre, Ninewells Hospital and Medical School, Dundee, DD1 9SY, UK
- Tayside Tissue Bank Ninewells Hospital and Medical School, University of Dundee, Dundee, DD1 9SY, UK
| | - Roman Sreseli
- Dundee Cancer Centre, Ninewells Hospital and Medical School, Dundee, DD1 9SY, UK
| | - Alison Ashfield
- Dundee Cancer Centre, Ninewells Hospital and Medical School, Dundee, DD1 9SY, UK
| | - Jurgen Mitsch
- Digital Research Service, University of Nottingham, Nottingham, NG8 1BB, UK
| | - Paul van den Ijssel
- Faculty of Medicine and Health Sciences, Biodiscovery Institute University Park, Nottingham, NG7 2RD, UK
- , Lelystad, Netherlands
| | - Alastair M Thompson
- Dundee Cancer Centre, Ninewells Hospital and Medical School, Dundee, DD1 9SY, UK.
- Dan L Duncan Comprehensive Cancer Center, Houston, TX 77030, USA.
| | - Roy A Quinlan
- Department of Biosciences, The University of Durham, Upper Mountjoy Science Site South Road, Durham, DH1 3LE, UK.
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Specific Roles of HSP27 S15 Phosphorylation Augmenting the Nuclear Function of HER2 to Promote Trastuzumab Resistance. Cancers (Basel) 2020; 12:cancers12061540. [PMID: 32545363 PMCID: PMC7352409 DOI: 10.3390/cancers12061540] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/09/2020] [Accepted: 06/09/2020] [Indexed: 02/07/2023] Open
Abstract
Trastuzumab (TZMB) is widely used as first line therapy for breast cancer (BC) patients overexpressing human epidermal growth factor receptor 2 (HER2). Despite its clinical benefits, many patients suffer from primary or secondary resistance to this drug within one year. As diverse molecular mechanisms occur contemporaneously during the resistance development, we focused on elucidating the role of heat shock protein 27 (HSP27) in TZMB-resistance, as this protein simultaneously regulates the function of diverse client molecules that are involved in the resistance mechanism. By extensively utilizing TZMB-refractory breast cancer cell lines transduced with diverse phosphovariants of HSP27, our study newly revealed that specific phosphorylation of HSP27 at S15 promoted its S78 phosphorylation and served as key mediator to promote direct interactions that increase the stability of HER2 and protein kinase B (AKT). This phosphorylation promoted nuclear translocation of HER2, enhancing the distinct nuclear function of HER2 that promoted AKT activation and cyclin D1 expression. Co-administration of TZMB and a functional inhibitor of HSP27, J2, significantly reduced the S15/78 phosphorylation of HSP27, which downregulated HER2 and its downstream signals, sensitizing TZMB-refractory cell, and JIMT1-xenograft mouse models to TZMB. Collectively, p-HSP27S15 could serve as a valuable predictive marker and also a therapeutic target for TZMB-resistance.
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Sisinni L, Pietrafesa M, Lepore S, Maddalena F, Condelli V, Esposito F, Landriscina M. Endoplasmic Reticulum Stress and Unfolded Protein Response in Breast Cancer: The Balance between Apoptosis and Autophagy and Its Role in Drug Resistance. Int J Mol Sci 2019; 20:ijms20040857. [PMID: 30781465 PMCID: PMC6412864 DOI: 10.3390/ijms20040857] [Citation(s) in RCA: 102] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 02/12/2019] [Accepted: 02/15/2019] [Indexed: 02/06/2023] Open
Abstract
The unfolded protein response (UPR) is a stress response activated by the accumulation of unfolded or misfolded proteins in the lumen of the endoplasmic reticulum (ER) and its uncontrolled activation is mechanistically responsible for several human pathologies, including metabolic, neurodegenerative, and inflammatory diseases, and cancer. Indeed, ER stress and the downstream UPR activation lead to changes in the levels and activities of key regulators of cell survival and autophagy and this is physiologically finalized to restore metabolic homeostasis with the integration of pro-death or/and pro-survival signals. By contrast, the chronic activation of UPR in cancer cells is widely considered a mechanism of tumor progression. In this review, we focus on the relationship between ER stress, apoptosis, and autophagy in human breast cancer and the interplay between the activation of UPR and resistance to anticancer therapies with the aim to disclose novel therapeutic scenarios. The hypothesis that autophagy and UPR may provide novel molecular targets in human malignancies is discussed.
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Affiliation(s)
- Lorenza Sisinni
- Laboratory of Pre-Clinical and Translational Research, IRCCS, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, Italy.
| | - Michele Pietrafesa
- Laboratory of Pre-Clinical and Translational Research, IRCCS, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, Italy.
| | - Silvia Lepore
- Laboratory of Pre-Clinical and Translational Research, IRCCS, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, Italy.
| | - Francesca Maddalena
- Laboratory of Pre-Clinical and Translational Research, IRCCS, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, Italy.
| | - Valentina Condelli
- Laboratory of Pre-Clinical and Translational Research, IRCCS, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, Italy.
| | - Franca Esposito
- Department of Molecular Medicine and Medical Biotechnology, University of Napoli Federico II, 80131 Naples, Italy.
| | - Matteo Landriscina
- Laboratory of Pre-Clinical and Translational Research, IRCCS, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, Italy.
- Medical Oncology Unit, Department of Medical and Surgical Sciences, University of Foggia, 71100 Foggia, Italy.
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Katsogiannou M, Andrieu C, Rocchi P. Heat shock protein 27 phosphorylation state is associated with cancer progression. Front Genet 2014; 5:346. [PMID: 25339975 PMCID: PMC4186339 DOI: 10.3389/fgene.2014.00346] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 09/16/2014] [Indexed: 11/13/2022] Open
Abstract
Understanding the mechanisms that control stress-induced survival is critical to explain how tumors frequently resist to treatment and to improve current anti-cancer therapies. Cancer cells are able to cope with stress and escape drug toxicity by regulating heat shock proteins (Hsps) expression and function. Hsp27 (HSPB1), a member of the small Hsp family, represents one of the key players of many signaling pathways contributing to tumorigenicity, treatment resistance, and apoptosis inhibition. Hsp27 is overexpressed in many types of cancer and its functions are regulated by post-translational modifications, such as phosphorylation. Protein phosphorylation is the most widespread signaling mechanism in eukaryotic cells, and it is involved in all fundamental cellular processes. Aberrant phosphorylation of Hsp27 has been associated with cancer but the molecular mechanisms by which it is implicated in cancer development and progression remain undefined. This mini-review focuses on the role of phosphorylation in Hsp27 functions in cancer cells and its potential usefulness as therapeutic target in cancer.
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Affiliation(s)
- Maria Katsogiannou
- Institut National de la Santé et de la Recherche Médicale, Unités Mixtes de Recherche 1068, Centre de Recherche en Cancérologie de Marseille Marseille, France ; Institut Paoli-Calmettes Marseille, France ; Centre de Recherche en Cancérologie de Marseille, Institut National de la Santé et de la Recherche Médicale Unités Mixtes de Recherche 1068, Aix-Marseille Université Marseille, France ; Centre National de la Recherche Scientifique, Unités Mixtes de Recherche 7258, Centre de Recherche en Cancérologie de Marseille Marseille, France
| | - Claudia Andrieu
- Institut National de la Santé et de la Recherche Médicale, Unités Mixtes de Recherche 1068, Centre de Recherche en Cancérologie de Marseille Marseille, France ; Institut Paoli-Calmettes Marseille, France ; Centre de Recherche en Cancérologie de Marseille, Institut National de la Santé et de la Recherche Médicale Unités Mixtes de Recherche 1068, Aix-Marseille Université Marseille, France ; Centre National de la Recherche Scientifique, Unités Mixtes de Recherche 7258, Centre de Recherche en Cancérologie de Marseille Marseille, France
| | - Palma Rocchi
- Institut National de la Santé et de la Recherche Médicale, Unités Mixtes de Recherche 1068, Centre de Recherche en Cancérologie de Marseille Marseille, France ; Institut Paoli-Calmettes Marseille, France ; Centre de Recherche en Cancérologie de Marseille, Institut National de la Santé et de la Recherche Médicale Unités Mixtes de Recherche 1068, Aix-Marseille Université Marseille, France ; Centre National de la Recherche Scientifique, Unités Mixtes de Recherche 7258, Centre de Recherche en Cancérologie de Marseille Marseille, France
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15
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Quercetin sensitizes human glioblastoma cells to temozolomide in vitro via inhibition of Hsp27. Acta Pharmacol Sin 2014; 35:832-8. [PMID: 24902789 DOI: 10.1038/aps.2014.22] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2013] [Accepted: 02/26/2014] [Indexed: 12/22/2022] Open
Abstract
AIM Quercetin is an effective Hsp27 inhibitor and has been reported to facilitate tumor cell apoptosis. The aim of this study was to investigate whether quercetin could sensitize human glioblastoma cells to temozolomide (TMZ) in vitro. METHODS Both U251 and U87 human glioblastoma cells were treated with quercetin and/or TMZ for 48 h. Cell viability was detected using the MTT assay. Cell apoptosis was analyzed with caspase-3 activity kits and flow cytometry. Hsp27 expression and phosphorylation were examined using Western blot analysis. RNA interference using Hsp27 siRNA oligos was performed to knock down the gene expression of Hsp27. RESULTS TMZ (200 or 400 μmol/L) alone effectively inhibited the viability of U251 and U87 cells. When combined with quercetin (30 μmol/L), TMZ (100 μmol/L) significantly inhibited the cell viability, and the inhibition of TMZ (200 and 400 μmol/L) was enhanced. TMZ or quercetin anole did not affect caspase-3 activity and cell apoptosis, while TMZ combined with quercetin significantly increased caspase-3 activity and induced cell apoptosis. TMZ anole significantly increased Hsp27 phosphorylation in U251 and U87 cells, while quercetin or Hsp27 siRNA oligos combined with TMZ attenuated TMZ-induced Hsp27 phosphorylation and significantly inhibited Hsp27 expression. CONCLUSION Combined treatment with TMZ and quercetin efficiently suppressed human glioblastoma cell survival in vitro.
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16
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Heat shock response associated with hepatocarcinogenesis in a murine model of hereditary tyrosinemia type I. Cancers (Basel) 2014; 6:998-1019. [PMID: 24762634 PMCID: PMC4074813 DOI: 10.3390/cancers6020998] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Revised: 03/15/2014] [Accepted: 04/03/2014] [Indexed: 01/19/2023] Open
Abstract
Hereditary Tyrosinemia type 1 (HT1) is a metabolic liver disease caused by genetic defects of fumarylacetoacetate hydrolase (FAH), an enzyme necessary to complete the breakdown of tyrosine. The severe hepatic dysfunction caused by the lack of this enzyme is prevented by the therapeutic use of NTBC (2-[2-nitro-4-(trifluoromethyl)benzoyl] cyclohexane-1,3-dione). However despite the treatment, chronic hepatopathy and development of hepatocellular carcinoma (HCC) are still observed in some HT1 patients. Growing evidence show the important role of heat shock proteins (HSPs) in many cellular processes and their involvement in pathological diseases including cancer. Their survival-promoting effect by modulation of the apoptotic machinery is often correlated with poor prognosis and resistance to therapy in a number of cancers. Here, we sought to gain insight into the pathophysiological mechanisms associated with liver dysfunction and tumor development in a murine model of HT1. Differential gene expression patterns in livers of mice under HT1 stress, induced by drug retrieval, have shown deregulation of stress and cell death resistance genes. Among them, genes coding for HSPB and HSPA members, and for anti-apoptotic BCL-2 related mitochondrial proteins were associated with the hepatocarcinogenetic process. Our data highlight the variation of stress pathways related to HT1 hepatocarcinogenesis suggesting the role of HSPs in rendering tyrosinemia-affected liver susceptible to the development of HCC.
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Arrigo AP, Gibert B. HspB1, HspB5 and HspB4 in Human Cancers: Potent Oncogenic Role of Some of Their Client Proteins. Cancers (Basel) 2014; 6:333-65. [PMID: 24514166 PMCID: PMC3980596 DOI: 10.3390/cancers6010333] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 01/03/2014] [Accepted: 01/17/2014] [Indexed: 12/20/2022] Open
Abstract
Human small heat shock proteins are molecular chaperones that regulate fundamental cellular processes in normal unstressed cells as well as in many cancer cells where they are over-expressed. These proteins are characterized by cell physiology dependent changes in their oligomerization and phosphorylation status. These structural changes allow them to interact with many different client proteins that subsequently display modified activity and/or half-life. Nowdays, the protein interactomes of small Hsps are under intense investigations and will represent, when completed, key parameters to elaborate therapeutic strategies aimed at modulating the functions of these chaperones. Here, we have analyzed the potential pro-cancerous roles of several client proteins that have been described so far to interact with HspB1 (Hsp27) and its close members HspB5 (αB-crystallin) and HspB4 (αA-crystallin).
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Affiliation(s)
- André-Patrick Arrigo
- Apoptosis, Cancer and Development Laboratory, Lyon Cancer Research Center, INSERM U1052-CNRS UMR5286, Claude Bernard University Lyon 1, Lyon 69008, France.
| | - Benjamin Gibert
- Apoptosis, Cancer and Development Laboratory, Lyon Cancer Research Center, INSERM U1052-CNRS UMR5286, Claude Bernard University Lyon 1, Lyon 69008, France.
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Zhang H, Xu Y, Filipovic A, Lit LC, Koo CY, Stebbing J, Giamas G. SILAC-based phosphoproteomics reveals an inhibitory role of KSR1 in p53 transcriptional activity via modulation of DBC1. Br J Cancer 2013; 109:2675-84. [PMID: 24129246 PMCID: PMC3833216 DOI: 10.1038/bjc.2013.628] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 09/13/2013] [Accepted: 09/18/2013] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND We have previously identified kinase suppressor of ras-1 (KSR1) as a potential regulatory gene in breast cancer. KSR1, originally described as a novel protein kinase, has a role in activation of mitogen-activated protein kinases. Emerging evidence has shown that KSR1 may have dual functions as an active kinase as well as a scaffold facilitating multiprotein complex assembly. Although efforts have been made to study the role of KSR1 in certain tumour types, its involvement in breast cancer remains unknown. METHODS A quantitative mass spectrometry analysis using stable isotope labelling of amino acids in cell culture (SILAC) was implemented to identify KSR1-regulated phosphoproteins in breast cancer. In vitro luciferase assays, co-immunoprecipitation as well as western blotting experiments were performed to further study the function of KSR1 in breast cancer. RESULTS Of significance, proteomic analysis reveals that KSR1 overexpression decreases deleted in breast cancer-1 (DBC1) phosphorylation. Furthermore, we show that KSR1 decreases the transcriptional activity of p53 by reducing the phosphorylation of DBC1, which leads to a reduced interaction of DBC1 with sirtuin-1 (SIRT1); this in turn enables SIRT1 to deacetylate p53. CONCLUSION Our findings integrate KSR1 into a network involving DBC1 and SIRT1, which results in the regulation of p53 acetylation and its transcriptional activity.
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Affiliation(s)
- H Zhang
- Division of Cancer, Department of Surgery and Cancer, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London, W12 ONN, UK
| | - Y Xu
- Division of Cancer, Department of Surgery and Cancer, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London, W12 ONN, UK
| | - A Filipovic
- Division of Cancer, Department of Surgery and Cancer, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London, W12 ONN, UK
| | - L C Lit
- Division of Cancer, Department of Surgery and Cancer, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London, W12 ONN, UK
- Department of Physiology, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - C-Y Koo
- Division of Cancer, Department of Surgery and Cancer, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London, W12 ONN, UK
| | - J Stebbing
- Division of Cancer, Department of Surgery and Cancer, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London, W12 ONN, UK
| | - G Giamas
- Division of Cancer, Department of Surgery and Cancer, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London, W12 ONN, UK
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Lal S, Allan A, Markovic D, Walker R, Macartney J, Europe-Finner N, Tyson-Capper A, Grammatopoulos DK. Estrogen Alters the Splicing of Type 1 Corticotropin-Releasing Hormone Receptor in Breast Cancer Cells. Sci Signal 2013; 6:ra53. [DOI: 10.1126/scisignal.2003926] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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20
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Tia SQ, Brown K, Chen D, Herr AE. Protein Post-Translational Modification Analyses Using On-Chip Immunoprobed Isoelectric Focusing. Anal Chem 2013; 85:2882-90. [DOI: 10.1021/ac3035053] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Samuel Q. Tia
- The UC Berkeley−UCSF
Graduate Program in Bioengineering, University of California, Berkeley, California 94720, United States
| | - Katharine Brown
- Department of Nutritional Science
and Toxicology, University of California, Berkeley, California 94720, United States
| | - Danica Chen
- Department of Nutritional Science
and Toxicology, University of California, Berkeley, California 94720, United States
| | - Amy E. Herr
- The UC Berkeley−UCSF
Graduate Program in Bioengineering, University of California, Berkeley, California 94720, United States
- Department of Bioengineering, University of California, 342 Stanley Hall, Berkeley,
California 94720, United States
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Alam R, Schultz CR, Golembieski WA, Poisson LM, Rempel SA. PTEN suppresses SPARC-induced pMAPKAPK2 and inhibits SPARC-induced Ser78 HSP27 phosphorylation in glioma. Neuro Oncol 2013; 15:451-61. [PMID: 23382286 DOI: 10.1093/neuonc/nos326] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Secreted protein acidic and rich in cysteine (SPARC) is overexpressed in astrocytomas (World Health Organization grades II-IV). We previously demonstrated that SPARC promotes glioma migration and invasion-in part, by activating the P38 mitogen-activated protein kinase (MAPK)-heat shock protein (HSP)27 signaling pathway. The commonly lost tumor suppressor phosphatase and tensin homolog (PTEN) suppresses SPARC-induced migration, which is accompanied by suppression of Shc-Ras-Raf-MEK-ERK1/2 and Akt signaling. As PTEN completely suppresses SPARC-induced migration, we proposed that PTEN must also interfere with SPARC-induced HSP27 signaling. Therefore, this study determined the effects of PTEN expression on SPARC-induced expression and phosphorylation of HSP27. METHODS Control and SPARC-expressing clones transfected with control- or PTEN-expression plasmids were plated on fibronectin-coated tissue culture plates for 3, 6, 24, and 48 h and then lysed. Equal amounts of protein were subjected to Western blot and densitometric analyses. RESULTS The results show that SPARC enhances phosphorylated (p)P38 MAPK, phosphorylated MAPK-activated protein kinase 2 (pMAPKAPK2), and serine (Ser)78 HSP27 phosphorylation relative to total HSP27. PTEN suppresses pAkt and pMAPKAPK2, suggesting that PTEN effects are downstream of pP38 MAPK. PTEN suppressed SPARC-induced sustained phosphorylation at Ser78 HSP27. As the level of total HSP27 differed based on the presence of SPARC or PTEN, the ratios of phosphorylation-specific to total HSP27 were examined. The data demonstrate that SPARC-induced phosphorylation at Ser78 remains elevated despite increasing levels of total HSP27. In contrast, PTEN inhibits SPARC-induced increases in Ser78 HSP27 phosphorylation relative to total HSP27. CONCLUSION These data describe a novel mechanism whereby PTEN inhibits SPARC-induced migration through suppression and differential regulation of pAkt and the P38 MAPK-MAPKAPK2-HSP27 signaling pathway.
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Affiliation(s)
- Ridwan Alam
- Barbara Jane Levy Laboratory of Molecular Neuro-Oncology, Hermelin Brain Tumor Center, Department of Neurosurgery, Education and Research Bldg., Henry Ford Hospital, 2799 West Grand Blvd., Detroit, MI 48202, USA
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Zoubeidi A, Gleave M. Small heat shock proteins in cancer therapy and prognosis. Int J Biochem Cell Biol 2012; 44:1646-56. [DOI: 10.1016/j.biocel.2012.04.010] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Revised: 02/27/2012] [Accepted: 04/11/2012] [Indexed: 01/05/2023]
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Ciocca DR, Arrigo AP, Calderwood SK. Heat shock proteins and heat shock factor 1 in carcinogenesis and tumor development: an update. Arch Toxicol 2012; 87:19-48. [PMID: 22885793 DOI: 10.1007/s00204-012-0918-z] [Citation(s) in RCA: 194] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Accepted: 07/25/2012] [Indexed: 12/20/2022]
Abstract
Heat shock proteins (HSP) are a subset of the molecular chaperones, best known for their rapid and abundant induction by stress. HSP genes are activated at the transcriptional level by heat shock transcription factor 1 (HSF1). During the progression of many types of cancer, this heat shock transcriptional regulon becomes co-opted by mechanisms that are currently unclear, although evidently triggered in the emerging tumor cell. Concerted activation of HSF1 and the accumulation of HSPs then participate in many of the traits that permit the malignant phenotype. Thus, cancers of many histologies exhibit activated HSF1 and increased HSP levels that may help to deter tumor suppression and evade therapy in the clinic. We review here the extensive work that has been carried out and is still in progress aimed at (1) understanding the oncogenic mechanisms by which HSP genes are switched on, (2) determining the roles of HSF1/HSP in malignant transformation and (3) discovering approaches to therapy based on disrupting the influence of the HSF1-controlled transcriptome in cancer.
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Affiliation(s)
- Daniel R Ciocca
- Oncology Laboratory, Institute of Experimental Medicine and Biology of Cuyo (IMBECU), Scientific and Technological Center (CCT), CONICET, 5500 Mendoza, Argentina.
| | - Andre Patrick Arrigo
- Apoptosis Cancer and Development, Cancer Research Center of Lyon (CRCL), UMR INSERM 1052-CNRS 5286, Claude Bernard University, Lyon-1, Cheney A Building, Centre Regional Léon Bérard, 28, rue Laennec 69008 LYON, France. ;
| | - Stuart K Calderwood
- Molecular and Cellular Radiation Oncology, Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Boston, MA02215
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Guo K, Gan L, Zhang S, Cui FJ, Cun W, Li Y, Kang NX, Gao MD, Liu KY. Translocation of HSP27 into liver cancer cell nucleus may be associated with phosphorylation and O-GlcNAc glycosylation. Oncol Rep 2012; 28:494-500. [PMID: 22664592 DOI: 10.3892/or.2012.1844] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Accepted: 01/16/2012] [Indexed: 11/06/2022] Open
Abstract
It has been reported that the dynamic interplay between O-GlcNAcylation and O-phosphorylation is responsible for altering the activity or localization of heat-shock proteins. The aim of this study was to determine whether dynamic interplay between O-GlcNAcylation and O-phosphorylation of HSP27 in hepatocellular cancer (HCC) cells affect its entry into the nucleus. We demonstrate that the entry of HSP27 into the nucleus correlated with its phosphorylation through transfecting HCC cells with plasmids coding for wild-type HSP27 (HSP27-WT), its non-phosphorylatable (HSP27-3A) and pseudophosphorylated (HSP27-3D) mutants, however, not all of the endogenous or exogenous nuclear HSP27 was modified by phosphorylation. We observed that HSP27 was modified with O-GlcNAc glycosylation in HCC cells and report that at conserved Ser residues of HSP27, alternative phosphorylation and O-GlcNAc modification can be predicted by the YinOYang 1.2 method. Furthermore, after P79350 or combined SB203580 and PUGNAc treatment, increased nuclear import of HSP27-WT and HSP27-3D implied that the entry of HSP27 into the nucleus was not only correlated with phosphorylation, but also with O-GlcNAc glycosylation. Collectively, O-GlcNAcylation of HSP27 in HCC cells may be a novel regulatory mode of HSP27 function, particularly for its entry into the nucleus. Crosstalk or interplay between glycosylation and phosphorylation of HSP27 could regulate its subcellular localization and biological functions in liver cancer.
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Affiliation(s)
- Kun Guo
- Liver Cancer Institute, Zhongshan Hospital, and Research Center for Cancer, Institute of Biomedical Science, Fudan University, Shanghai 200032, PR China
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Heat shock protein 27 (HSP27): biomarker of disease and therapeutic target. FIBROGENESIS & TISSUE REPAIR 2012; 5:7. [PMID: 22564335 PMCID: PMC3464729 DOI: 10.1186/1755-1536-5-7] [Citation(s) in RCA: 201] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Accepted: 05/07/2012] [Indexed: 12/21/2022]
Abstract
Heat shock protein 27 (HSP27) is a multidimensional protein which acts as a protein chaperone and an antioxidant and plays a role in the inhibition of apoptosis and actin cytoskeletal remodeling. In each of these capacities, HSP27 has been implicated in different disease states playing both protective and counter-protective roles. The current review presents HSP27 in multiple disease contexts: renal injury and fibrosis, cancer, neuro-degenerative and cardiovascular disease, highlighting its role as a potential biomarker and therapeutic target.
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Berg D, Wolff C, Langer R, Schuster T, Feith M, Slotta-Huspenina J, Malinowsky K, Becker KF. Discovery of new molecular subtypes in oesophageal adenocarcinoma. PLoS One 2011; 6:e23985. [PMID: 21966358 PMCID: PMC3179464 DOI: 10.1371/journal.pone.0023985] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Accepted: 07/28/2011] [Indexed: 12/22/2022] Open
Abstract
A large number of patients suffering from oesophageal adenocarcinomas do not respond to conventional chemotherapy; therefore, it is necessary to identify new predictive biomarkers and patient signatures to improve patient outcomes and therapy selections. We analysed 87 formalin-fixed and paraffin-embedded (FFPE) oesophageal adenocarcinoma tissue samples with a reverse phase protein array (RPPA) to examine the expression of 17 cancer-related signalling molecules. Protein expression levels were analysed by unsupervised hierarchical clustering and correlated with clinicopathological parameters and overall patient survival. Proteomic analyses revealed a new, very promising molecular subtype of oesophageal adenocarcinoma patients characterised by low levels of the HSP27 family proteins and high expression of those of the HER family with positive lymph nodes, distant metastases and short overall survival. After confirmation in other independent studies, our results could be the foundation for the development of a Her2-targeted treatment option for this new patient subgroup of oesophageal adenocarcinoma.
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Affiliation(s)
- Daniela Berg
- Institute of Pathology, Technische Universität München, Munich, Germany
| | - Claudia Wolff
- Institute of Pathology, Technische Universität München, Munich, Germany
| | - Rupert Langer
- Institute of Pathology, Technische Universität München, Munich, Germany
| | - Tibor Schuster
- Institute of Medical Statistics and Epidemiology, Technische Universität München, Munich, Germany
| | - Marcus Feith
- Department of Surgery, Technische Universität München, Munich, Germany
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27
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Khalil AA, Kabapy NF, Deraz SF, Smith C. Heat shock proteins in oncology: diagnostic biomarkers or therapeutic targets? Biochim Biophys Acta Rev Cancer 2011; 1816:89-104. [PMID: 21605630 DOI: 10.1016/j.bbcan.2011.05.001] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2010] [Revised: 05/04/2011] [Accepted: 05/06/2011] [Indexed: 02/08/2023]
Abstract
Heat shock proteins (HSP) are a family of proteins induced in cells exposed to different insults. This induction of HSPs allows cells to survive stress conditions. Mammalian HSPs have been classified into six families according to their molecular size: HSP100, HSP90, HSP70, HSP60, HSP40 and small HSPs (15 to 30kDa) including HSP27. These proteins act as molecular chaperones either helping in the refolding of misfolded proteins or assisting in their elimination if they become irreversibly damaged. In recent years, proteomic studies have characterized several different HSPs in various tumor types which may be putative clinical biomarkers or molecular targets for cancer therapy. This has led to the development of a series of molecules capable of inhibiting HSPs. Numerous studies speculated that over-expression of HSP is in part responsible for resistance to many anti-tumor agents and chemotherapeutics. Hence, from a pharmacological point of view, the co-administration of HSP inhibitors together with other anti-tumor agents is of major importance in overcoming therapeutic resistance. In this review, we provide an overview of the current status of HSPs in autoimmune, cardiovascular, and neurodegenerative diseases with special emphasis on cancer.
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Affiliation(s)
- Ashraf A Khalil
- Department of Protein Technology, Institute of Genetic Engineering and Biotechnology, Mubarak City for Scientific Research, New Borg Elarab, Alexandria, Egypt.
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Abstract
Alarmins are a kind of constitutive cellular proteins which are released extracellularly under pathological conditions to signal danger to the host by triggering and mediating inflammatory responses. Persistent release of alarmins (e.g., HMBG1, HSPs and S100) during chronic liver inflammation and in tumor microenvironments plays an important role in the development and progression of liver carcinoma. Alarmins might become novel markers for predicting and monitoring carcinogenesis, metastasis and recurrence of liver carcinoma. Down-regulation of alarmins and blockage of the interaction of alarmins with their receptors represent new promising therapeutic strategies for liver carcinoma.
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Wong LL, Zhang D, Chang CF, Koay ES. Silencing of the PP2A catalytic subunit causes HER-2/neu positive breast cancer cells to undergo apoptosis. Exp Cell Res 2010; 316:3387-96. [DOI: 10.1016/j.yexcr.2010.06.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2010] [Revised: 06/04/2010] [Accepted: 06/06/2010] [Indexed: 11/30/2022]
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Abstract
IMPORTANCE OF THE FIELD p90 ribosomal S6 kinase 2 (RSK2) belongs to a Ser/Thr kinase family containing four members, RSK1 - 4, which play an essential role in a number of cellular functions including cell cycle, survival and proliferation. Recent advances reveal a crucial role of RSK2 in oncogenesis and tumor progression, making RSK2 an attractive therapeutic target for cancer treatment. AREA COVERED IN THIS REVIEW Recent findings identifying the role of RSK2 in human cancers, including hematopoietic malignancies and solid tumors. Therapeutic implications of targeting RSK2 are also discussed with regard to clinical circumstance. WHAT THE READER WILL GAIN A better understanding of molecular mechanisms underlying RSK2 activation and its contribution to human cancers and also insight into the development of novel targeted cancer therapy. TAKE HOME MESSAGE The significance of RSK2 in cancer cell survival, proliferation, invasion and tumor metastasis varies amongst human malignancies and depends on the signaling properties of the oncogenes and cellular microenvironment of the transformed cells. Thus, further exploitation of RSK2 signaling and its dynamic interaction with other crucial oncogenic and pro-metastatic pathways in different human malignancies is needed for more effective therapeutic interventions.
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Affiliation(s)
- Sumin Kang
- Emory University School of Medicine, Winship Cancer Institute of Emory, Department of Hematology and Medical Oncology, Atlanta, GA 30322, USA. ;
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Chandrika BB, Maney SK, Lekshmi SU, Retnabhai ST. Endoplasmic reticulum targeted Bcl2 confers long term cell survival through phosphorylation of heat shock protein 27. Int J Biochem Cell Biol 2010; 42:1984-92. [PMID: 20800695 DOI: 10.1016/j.biocel.2010.08.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2010] [Revised: 07/22/2010] [Accepted: 08/19/2010] [Indexed: 10/19/2022]
Abstract
Overexpression of anti-apoptotic Bcl2 family proteins is often seen in cancers rendering them insensitive to apoptosis inducing anticancer strategies. Anti-apoptotic Bcl2 family proteins are associated with different organelles like mitochondria and endoplasmic reticulum (ER) and exert their anti-apoptotic activity by inhibiting the release of Cyt.C from mitochondria irrespective of its localization. Here, we have identified a long term survival function for Bcl2 targeted at ER in mammalian system compared to wild type Bcl2 that is mediated by enhanced phosphorylation of heat shock protein 27 at ser 15, 78 and 82 sites with inhibition of caspase9 activity. Phosphorylation of hsp27 was prevented and the survival of ER-Bcl2 cells was reversed by inhibiting p38 and MEK suggesting that these kinases can act as the upstream targets for hsp27 phosphorylation. The results suggest that Bcl2 possess additional survival function in the regulation of apoptosis which is primarily regulated by its association with the ER in an hsp27 dependent manner. The interplay of both hsp27 and ER-Bcl2 in providing long term survival to cancer cells is interesting since both of these proteins are overexpressed in tumors with aggressive phenotype. The results suggest that spatial localization of Bcl2 family proteins also play a key role in long term survival of cancers indicating another level of functional regulation of Bcl2 in cancer cell survival.
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Affiliation(s)
- Bhavya Balan Chandrika
- Integrated Cancer Research, Rajiv Gandhi Centre for Biotechnology, Poojappura, Thycaud PO, Thiruvananthapuram, Kerala 695014, India
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Henderson H, Macleod G, Hrabchak C, Varmuza S. New candidate targets of protein phosphatase-1c-gamma-2 in mouse testis revealed by a differential phosphoproteome analysis. ACTA ACUST UNITED AC 2010; 34:339-51. [PMID: 20618881 DOI: 10.1111/j.1365-2605.2010.01085.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reversible phosphorylation has been implicated in many developmental processes. Dephosphorylation is mediated by several families of phosphatases, including type 1 serine/threonine phosphatases (protein phosphatase-1 or PP1). The loss of the murine Ppp1cc gene causes male infertility as a result of impaired spermatogenesis. Ppp1cc encodes two splice isoforms, PPP1CC1 and PPP1CC2, with the latter being the most abundant isoform in the testis. However, the details of PPP1CC2's involvement in spermatogenesis are still unknown. As a phosphatase has been removed from the mutant mouse, a search for hyperphosphorylated proteins in the mutant testis may reveal the direct downstream targets of PPP1CC2. Using a whole tissue proteomics approach to identify testis-specific dephosphorylation targets of PPP1CC2, we found that two-dimensional electrophoresis identified 10 potential targets in the Ppp1cc null testis several of which are factors known to be important for spermatogenesis, such as HSPA2. Another potential target, tubulin, was found to be misregulated during Ppp1cc(-/-) spermatogenesis, disrupting manchette development. This work represents the first survey of the testicular phosphoproteome under pathological conditions.
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Affiliation(s)
- H Henderson
- Department of Cell and Systems Biology, University of Toronto, Toronto, Ontario, Canada
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33
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Domanski D, Murphy LC, Borchers CH. Assay development for the determination of phosphorylation stoichiometry using multiple reaction monitoring methods with and without phosphatase treatment: application to breast cancer signaling pathways. Anal Chem 2010; 82:5610-20. [PMID: 20524616 PMCID: PMC2909760 DOI: 10.1021/ac1005553] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We have developed a phosphatase-based phosphopeptide quantitation (PPQ) method for determining phosphorylation stoichiometry in complex biological samples. This PPQ method is based on enzymatic dephosphorylation, combined with specific and accurate peptide identification and quantification by multiple reaction monitoring (MRM) with stable-isotope-labeled standard peptides. In contrast with classical MRM methods for the quantitation of phosphorylation stoichiometry, the PPQ-MRM method needs only one nonphosphorylated SIS (stable isotope-coded standard) and two analyses (one for the untreated sample and one for the phosphatase-treated sample), from which the expression and modification levels can accurately be determined. From these analyses, the percent phosphorylation can be determined. In this manuscript, we compare the PPQ-MRM method with an MRM method without phosphatase and demonstrate the application of these methods to the detection and quantitation of phosphorylation of the classic phosphorylated breast cancer biomarkers (ERalpha and HER2), and for phosphorylated RAF and ERK1, which also contain phosphorylation sites of biological importance. Using synthetic peptides spiked into a complex protein digest, we were able to use our PPQ-MRM method to accurately determine the total phosphorylation stoichiometry on specific peptides as well as the absolute amount of the peptide and phosphopeptide present. Analyses of samples containing ERalpha protein revealed that the PPQ-MRM method is capable of determining phosphorylation stoichiometry in proteins from cell lines, and is in good agreement with determinations obtained using the direct MRM approach in terms of phosphorylation and total protein amount.
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Affiliation(s)
- Dominik Domanski
- University of Victoria – Genome BC Proteomics Centre, #3101-4464 Markham St., Victoria, BC, Canada, V8Z-7X8
| | - Leigh C. Murphy
- Manitoba Institute of Cell Biology, University of Manitoba, 675 McDermot Ave. Rm. ON5008B, Winnipeg, MB R3E 0V9
| | - Christoph H. Borchers
- University of Victoria – Genome BC Proteomics Centre, #3101-4464 Markham St., Victoria, BC, Canada, V8Z-7X8
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Kang S, Elf S, Lythgoe K, Hitosugi T, Taunton J, Zhou W, Xiong L, Wang D, Muller S, Fan S, Sun SY, Marcus AI, Gu TL, Polakiewicz RD, Chen ZG, Khuri FR, Shin DM, Chen J. p90 ribosomal S6 kinase 2 promotes invasion and metastasis of human head and neck squamous cell carcinoma cells. J Clin Invest 2010; 120:1165-77. [PMID: 20234090 DOI: 10.1172/jci40582] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2009] [Accepted: 01/13/2010] [Indexed: 01/22/2023] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) is one of the most common types of human cancer and frequently metastasizes to LNs. Identifying metastasis-promoting factors is of immense clinical interest, as the prognosis for patients with even a single unilateral LN metastasis is extremely poor. Here, we report that p90 ribosomal S6 kinase 2 (RSK2) promotes human HNSCC cell invasion and metastasis. We determined that RSK2 was overexpressed and activated in highly invasive HNSCC cell lines compared with poorly invasive cell lines. Expression of RSK2 also correlated with metastatic progression in patients with HNSCC. Ectopic expression of RSK2 substantially enhanced the invasive capacity of HNSCC cells, while inhibition of RSK2 activity led to marked attenuation of invasion in vitro. Additionally, shRNA knockdown of RSK2 substantially reduced the invasive and metastatic potential of HNSCC cells in vitro and in vivo in a xenograft mouse model, respectively. Mechanistically, we determined that cAMP-responsive element-binding protein (CREB) and Hsp27 are phosphorylated and activated by RSK2 and are important for the RSK2-mediated invasive ability of HNSCC cells. Our findings suggest that RSK2 is involved in the prometastatic programming of HNSCC cells, through phosphorylation of proteins in a putative signaling network. Moreover, targeting RSK2 markedly attenuates in vitro invasion and in vivo metastasis of HNSCC cells, suggesting that RSK2 may represent a therapeutic target in the treatment of metastatic HNSCC.
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Affiliation(s)
- Sumin Kang
- Winship Cancer Institute of Emory University, Atlanta, Georgia 30322, USA.
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Transcriptional regulation of vascular endothelial growth factor C by oxidative and thermal stress is mediated by lens epithelium-derived growth factor/p75. Neoplasia 2009; 11:921-33. [PMID: 19724686 DOI: 10.1593/neo.09636] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2009] [Revised: 06/16/2009] [Accepted: 06/16/2009] [Indexed: 01/13/2023] Open
Abstract
Vascular endothelial growth factor C (VEGF-C) plays a critical role in tumor lymphangiogenesis and lymph node metastasis. We report here that VEGF-C expression is regulated by microenvironmental stress including hyperthermia and oxidative stress. Furthermore, we show that this stress response is mediated by transcriptional activation mediated by lens epithelium-derived growth factor (LEDGF/p75). Ectopic expression of LEDGF/p75 in C6 rat glioma and in H1299 human non-small cell lung carcinoma induced VEGF-C expression in vitro, whereas in subcutaneous mouse tumor xenografts, LEDGF/p75 stimulated VEGF-C expression and augmented angiogenesis and lymphangiogenesis. Conversely, overexpression of a LEDGF/p75 native antisense or LEDGF/p75-targeted short interfering RNA downmodulated VEGF-C expression. LEDGF seemed to conferred this activity on binding to a conserved stress response element (STRE) located in the VEGF-C gene because mutating the STRE was sufficient for the suppression of basal and stress-induced activations of the VEGF-C promoter. Thus, the study reported here identified a role for LEDGF/p75 in stress-regulated transcriptional control of VEGF-C expression. These results provide a possible link for LEDGF/p75 in tumor lymphangiogenesis and cancer metastasis. Hence, our data suggest the LEDGF-VEGF-C axis as a putative biomarker for the detection of stress-induced lymphangiogenesis and LEDGF as a potential target for antimetastatic therapy.
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36
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Watterson TL, Hamilton B, Martin R, Coulombe RA. Urban particulate matter causes ER stress and the unfolded protein response in human lung cells. Toxicol Sci 2009; 112:111-22. [PMID: 19675143 DOI: 10.1093/toxsci/kfp186] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Because of its presumed adverse health effects, particulate air pollution (PM) has received growing attention, but the cellular mechanisms by which PM exerts toxicity are not well elucidated. PM has been associated with early mortality from illnesses that share endoplasmic reticulum (ER) stress as a mechanism of pathogenesis. In this study, we examined whether PM would induce the unfolded protein response (UPR) which is a cellular response to ER stress. Coarse (PM(10)) and fine (PM(2.5)) PM was collected from a single location in Northern Utah's Cache Valley during atmospheric inversions occurring in January 2002 and January 2003. Extracts of PM samples were added (12.5 and 25 microg/ml) to cultured human bronchial epithelial (BEAS-2B) cells for 24 h. At these concentrations neither PM nor LPS exhibited demonstrable cytotoxicity by the neutral red assay. However, PM elicited significant increases of unfolded protein response (UPR)-related post-translational modifications, such as S6 ribosomal protein, heat-shock protein (Hsp)27, and protein kinase related protein phosphorylation and cleavage of activating transcription factor (ATF)-6. PM exposure also resulted in significant increases in the UPR-associated proteins ATF-4, Hsp70, Hsp90, and binding immunoglobulin protein. PM also interfered with the export of Hsp70 from the cells in a concentration-dependent manner and resulted in release of C-reactive protein. Calpain was upregulated and activated in PM-treated cultures, though these events were not proapoptotic. This study demonstrates that PM is capable of inducing ER stress and the UPR in vitro and may be a mechanism by which PM exerts toxicity.
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Affiliation(s)
- Todd L Watterson
- Graduate Program in Toxicology, and Department of Veterinary Sciences, Utah State University, Logan, Utah 84322-4620
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Chuthapisith S, Bean BE, Cowley G, Eremin JM, Samphao S, Layfield R, Kerr ID, Wiseman J, El-Sheemy M, Sreenivasan T, Eremin O. Annexins in human breast cancer: Possible predictors of pathological response to neoadjuvant chemotherapy. Eur J Cancer 2009; 45:1274-1281. [PMID: 19171478 DOI: 10.1016/j.ejca.2008.12.026] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2008] [Revised: 12/17/2008] [Accepted: 12/19/2008] [Indexed: 11/24/2022]
Abstract
Neoadjuvant chemotherapy is used in women who have large or locally advanced breast cancers. However, up to 70% of women who receive neoadjuvant chemotherapy fail to achieve a complete pathological response in their primary tumour (a surrogate marker of long-term survival). Five proteins, previously identified to be linked with chemoresistance in our in vitro experiments, were identified histochemically in pre-treatment core needle biopsies from 40 women with large or locally advanced breast cancers. Immunohistochemical staining with the five proteins showed no single protein to be a predictor of response to chemotherapy. However, pre-treatment breast cancer specimens that were annexin-A2 positive but annexin-A1 negative correlated with a poor pathological response (p=0.04, Fisher's exact test). The mechanisms by which annexins confer chemoresistance have not been identified, but may be due to inhibition of apoptosis. Annexin-A1 has been shown to enhance apoptosis, whilst annexin-A2, by contrast, inhibits apoptosis.
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Affiliation(s)
- Suebwong Chuthapisith
- Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand; Division of Surgery, Queen's Medical Centre, University of Nottingham, E Floor, West Block, Nottingham NG7 2UH, UK.
| | | | | | | | - Srila Samphao
- Lincoln Breast Unit, Lincoln County Hospital, Lincoln, UK
| | - Robert Layfield
- School of Biomedical Sciences, Queen's Medical Centre, University of Nottingham, UK
| | - Ian D Kerr
- School of Biomedical Sciences, Queen's Medical Centre, University of Nottingham, UK
| | - Janice Wiseman
- Lincoln Breast Unit, Lincoln County Hospital, Lincoln, UK
| | | | | | - Oleg Eremin
- Division of Surgery, Queen's Medical Centre, University of Nottingham, E Floor, West Block, Nottingham NG7 2UH, UK; Lincoln Breast Unit, Lincoln County Hospital, Lincoln, UK
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Kang SH, Kang KW, Kim KH, Kwon B, Kim SK, Lee HY, Kong SY, Lee ES, Jang SG, Yoo BC. Upregulated HSP27 in human breast cancer cells reduces Herceptin susceptibility by increasing Her2 protein stability. BMC Cancer 2008; 8:286. [PMID: 18834540 PMCID: PMC2567332 DOI: 10.1186/1471-2407-8-286] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2008] [Accepted: 10/04/2008] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Elucidating the molecular mechanisms by which tumors become resistant to Herceptin is critical for the treatment of Her2-overexpressed metastatic breast cancer. METHODS To further understand Herceptin resistance mechanisms at the molecular level, we used comparative proteome approaches to analyze two human breast cancer cell lines; Her2-positive SK-BR-3 cells and its Herceptin-resistant SK-BR-3 (SK-BR-3 HR) cells. RESULTS Heat-shock protein 27 (HSP27) expression was shown to be upregulated in SK-BR-3 HR cells. Suppression of HSP27 by specific siRNA transfection increased the susceptibility of SK-BR-3 HR cells to Herceptin. In the presence of Herceptin, Her2 was downregulated in both cell lines. However, Her2 expression was reduced by a greater amount in SK-BR-3 parent cells than in SK-BR-3 HR cells. Interestingly, co-immunoprecipitation analysis showed that HSP27 can bind to Her2. In the absence of Herceptin, HSP27 expression is suppressed and Her2 expression is reduced, indicating that downregulation of Her2 by Herceptin can be obstructed by the formation of a Her2-HSP27 complex. CONCLUSION Our present study demonstrates that upregulated HSP27 in human breast cancer cells can reduce Herceptin susceptibility by increasing Her2 protein stability.
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Affiliation(s)
- Se Hun Kang
- Research Institute and Hospital, National Cancer Center, Republic of Korea.
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Brozkova K, Budinska E, Bouchal P, Hernychova L, Knoflickova D, Valik D, Vyzula R, Vojtesek B, Nenutil R. Surface-enhanced laser desorption/ionization time-of-flight proteomic profiling of breast carcinomas identifies clinicopathologically relevant groups of patients similar to previously defined clusters from cDNA expression. Breast Cancer Res 2008; 10:R48. [PMID: 18510725 PMCID: PMC2481497 DOI: 10.1186/bcr2101] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2007] [Revised: 04/29/2008] [Accepted: 05/29/2008] [Indexed: 11/12/2022] Open
Abstract
Introduction Microarray-based gene expression profiling represents a major breakthrough for understanding the molecular complexity of breast cancer. cDNA expression profiles cannot detect changes in activities that arise from post-translational modifications, however, and therefore do not provide a complete picture of all biologically important changes that occur in tumors. Additional opportunities to identify and/or validate molecular signatures of breast carcinomas are provided by proteomic approaches. Surface-enhanced laser desorption/ionization time-of-flight mass spectrometry (SELDI-TOF MS) offers high-throughput protein profiling, leading to extraction of protein array data, calling for effective and appropriate use of bioinformatics and statistical tools. Methods Whole tissue lysates of 105 breast carcinomas were analyzed on IMAC 30 ProteinChip Arrays (Bio-Rad, Hercules, CA, USA) using the ProteinChip Reader Model PBS IIc (Bio-Rad) and Ciphergen ProteinChip software (Bio-Rad, Hercules, CA, USA). Cluster analysis of protein spectra was performed to identify protein patterns potentially related to established clinicopathological variables and/or tumor markers. Results Unsupervised hierarchical clustering of 130 peaks detected in spectra from breast cancer tissue lysates provided six clusters of peaks and five groups of patients differing significantly in tumor type, nuclear grade, presence of hormonal receptors, mucin 1 and cytokeratin 5/6 or cytokeratin 14. These tumor groups resembled closely luminal types A and B, basal and HER2-like carcinomas. Conclusion Our results show similar clustering of tumors to those provided by cDNA expression profiles of breast carcinomas. This fact testifies the validity of the SELDI-TOF MS proteomic approach in such a type of study. As SELDI-TOF MS provides different information from cDNA expression profiles, the results suggest the technique's potential to supplement and expand our knowledge of breast cancer, to identify novel biomarkers and to produce clinically useful classifications of breast carcinomas.
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Affiliation(s)
- Kristyna Brozkova
- Masaryk Memorial Cancer Institute, Zluty kopec 7, 656 53 Brno, Czech Republic
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