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Xiong YJ, Zhu Y, Liu YL, Zhao YF, Shen X, Zuo WQ, Lin F, Liang ZQ. P300 participates in ionizing radiation-mediated activation of cathepsin L by mutant p53. J Pharmacol Exp Ther 2021; 378:276-286. [PMID: 34253647 DOI: 10.1124/jpet.121.000639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 06/28/2021] [Indexed: 11/22/2022] Open
Abstract
Our previous studies have shown that cathepsin L (CTSL) is involved in the ability of tumors to resist ionizing radiation (IR), but the specific mechanisms responsible for this remain unknown. We report here that mutant p53 (mut-p53) is involved in IR-induced transcription of CTSL. We found that irradiation caused activation of CTSL in mut-p53 cell lines whereas there was almost no activation in p53 wild-type (wt-p53) cell lines. Additionally, luciferase reporter gene assay results demonstrated that IR induced the p53 binding region on the CTSL promoter. We further demonstrated that the expression of p300 and Egr-1 was up-regulated in mut-p53 cell lines after IR treatment. Accordingly, the expression of Ac-H3, Ac-H4, AcH3K9 was up-regulated after IR treatment in mut-p53 cell lines, while HDAC4 and HDAC6 were reciprocally decreased. Moreover, knockdown of either Egr-1 or p300 abolished the binding of mut-p53 to the promoter of CTSL. ChIP assay results showed that the IR-activated transcription of CTSL was dependent on p300. To further delineate the clinical relevance of interactions between Egr-1/p300, mut-p53 and CTSL, we accessed primary tumor samples to evaluate the relationships between mut-p53, CTSL and Egr-1 /p300 ex vivo. The results support the notion that mut-p53 is correlated with CTSL transcription involving the Egr-1/p300 pathway. Taken together, the results of our study revealed that p300 is an important target in the process of IR induced transcription of CTSL, which confirms that CTSL participates in mut-p53 gain of function. Significance Statement Transcriptional activation of cathepsin L by ionizing radiation required the involvement of mutated p53 and Egr-1/p300. Interference with Egr-1 or p300 could inhibit the expression of cathepsin L induced by ionizing radiation. The transcriptional activation of cathepsin L by p300 may be mediated by p53 binding sites on the cathepsin L promoter.
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Affiliation(s)
- Ya-Jie Xiong
- Department of Pharmacology, Soochow University, China
| | - Ying Zhu
- Department of Pharmacy, Suzhou Kowloon Hospital, Shanghai Jiaotong University School of Medicine, China
| | - Ya-Li Liu
- Department of Pharmacology, Soochow University, China
| | - Yi-Fan Zhao
- Department of Pharmacology, Soochow University, China
| | - Xiao Shen
- Department of Pharmacology, Soochow University, China
| | - Wen-Qing Zuo
- Department of Pharmacology, Soochow University, China
| | - Fang Lin
- Department of Pharmacology, Soochow University, China
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Tervonen TA, Pant SM, Belitškin D, Englund JI, Närhi K, Haglund C, Kovanen PE, Verschuren EW, Klefström J. Oncogenic Ras Disrupts Epithelial Integrity by Activating the Transmembrane Serine Protease Hepsin. Cancer Res 2021; 81:1513-1527. [PMID: 33461973 DOI: 10.1158/0008-5472.can-20-1760] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 11/10/2020] [Accepted: 01/11/2021] [Indexed: 11/16/2022]
Abstract
Ras proteins play a causal role in human cancer by activating multiple pathways that promote cancer growth and invasion. However, little is known about how Ras induces the first diagnostic features of invasion in solid tumors, including loss of epithelial integrity and breaching of the basement membrane (BM). In this study, we found that oncogenic Ras strongly promotes the activation of hepsin, a member of the hepsin/TMPRSS type II transmembrane serine protease family. Mechanistically, the Ras-dependent hepsin activation was mediated via Raf-MEK-ERK signaling, which controlled hepsin protein stability through the heat shock transcription factor-1 stress pathway. In Ras-transformed three-dimensional mammary epithelial culture, ablation of hepsin restored desmosomal cell-cell junctions, hemidesmosomes, and BM integrity and epithelial cohesion. In tumor xenografts harboring mutant KRas, silencing of hepsin increased local invasion concomitantly with accumulation of collagen IV. These findings suggest that hepsin is a critical protease for Ras-dependent tumorigenesis, executing cell-cell and cell-matrix pathologies important for early tumor dissemination. SIGNIFICANCE: These findings identify the cell-surface serine protease hepsin as a potential therapeutic target for its role in oncogenic Ras-mediated deregulation of epithelial cell-cell and cell-matrix interactions and cohesion of epithelial structure.
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Affiliation(s)
- Topi A Tervonen
- Research Programs Unit/Translational Cancer Medicine and Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Shishir M Pant
- Research Programs Unit/Translational Cancer Medicine and Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Denis Belitškin
- Research Programs Unit/Translational Cancer Medicine and Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Johanna I Englund
- Research Programs Unit/Translational Cancer Medicine and Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Katja Närhi
- Research Programs Unit/Translational Cancer Medicine and Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland.,Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland
| | - Caj Haglund
- Research Programs Unit/Translational Cancer Medicine Research Program and Department of Surgery, Clinicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Panu E Kovanen
- Research Programs Unit/Translational Cancer Medicine and Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland.,Department of Pathology, HUSLAB and Haartman Institute, Helsinki University Central Hospital and University of Helsinki, Helsinki, Finland
| | - Emmy W Verschuren
- Research Programs Unit/Translational Cancer Medicine and Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland.,Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland
| | - Juha Klefström
- Research Programs Unit/Translational Cancer Medicine and Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland. .,Finnish Cancer Institute, FICAN South, Helsinki University Hospital and Faculty of Medicine, University of Helsinki, Helsinki, Finland
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Wang L, Zhao Y, Xiong Y, Wang W, Fei Y, Tan C, Liang Z. K-ras mutation promotes ionizing radiation-induced invasion and migration of lung cancer in part via the Cathepsin L/CUX1 pathway. Exp Cell Res 2018; 362:424-435. [DOI: 10.1016/j.yexcr.2017.12.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 12/05/2017] [Accepted: 12/07/2017] [Indexed: 01/10/2023]
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Xu QF, Zheng Y, Chen J, Xu XY, Gong ZJ, Huang YF, Lu C, Maibach HI, Lai W. Ultraviolet A Enhances Cathepsin L Expression and Activity via JNK Pathway in Human Dermal Fibroblasts. Chin Med J (Engl) 2017; 129:2853-2860. [PMID: 27901001 PMCID: PMC5146795 DOI: 10.4103/0366-6999.194654] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Cathepsin L (CatL) is a cysteine protease with strong matrix degradation activity that contributes to photoaging. Mannose phosphate-independent sorting pathways mediate ultraviolet A (UVA)-induced alternate trafficking of CatL. Little is known about signaling pathways involved in the regulation of UVA-induced CatL expression and activity. This study aims to investigate whether a single UVA irradiation affects CatL expression and activity and whether mitogen-activated protein kinase (MAPK)/activator protein-1 (AP-1) pathway is involved in the regulation of UVA-induced CatL expression and activity in human dermal fibroblasts (HDFs). METHODS Primary HDFs were exposed to UVA. Cell proliferation was determined by a cell counting kit. UVA-induced CatL production and activity were studied with quantitative real-time reverse transcription polymerase chain reaction (RT-PCR), Western blotting, and fluorimetric assay in cell lysates collected on three consecutive days after irradiation. Time courses of UVA-activated JNK and p38MAPK signaling were examined by Western blotting. Effects of MAPK inhibitors and knockdown of Jun and Fos on UVA-induced CatL expression and activity were investigated by RT-PCR, Western blotting, and fluorimetric assay. Data were analyzed by one-way analysis of variance. RESULTS UVA significantly increased CatL gene expression, protein abundance, and enzymatic activity for three consecutive days after irradiation (F = 83.11, 56.14, and 71.19, respectively; all P < 0.05). Further investigation demonstrated phosphorylation of JNK and p38MAPK activated by UVA. Importantly, inactivation of JNK pathway significantly decreased UVA-induced CatL expression and activity, which were not affected by p38MAPK inhibition. Moreover, knockdown of Jun and Fos significantly attenuated basal and UVA-induced CatL expression and activity. CONCLUSIONS UVA enhances CatL production and activity in HDFs, probably by activating JNK and downstreaming AP-1. These findings provide a new possible molecular approach for antiphotoaging therapy.
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Affiliation(s)
- Qing-Fang Xu
- Department of Dermato-Venereology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510630, China
| | - Yue Zheng
- Department of Dermato-Venereology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510630, China
| | - Jian Chen
- Department of Dermato-Venereology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510630, China
| | - Xin-Ya Xu
- Department of Dermato-Venereology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510630, China
| | - Zi-Jian Gong
- Department of Dermato-Venereology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510630, China
| | - Yun-Fen Huang
- Department of Dermato-Venereology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510630, China
| | - Chun Lu
- Department of Dermato-Venereology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510630, China
| | - Howard I Maibach
- Department of Dermatology, School of Medicine, University of California, San Francisco, CA 94143, USA
| | - Wei Lai
- Department of Dermato-Venereology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510630, China
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Graziano S, Gonzalo S. Mechanisms of oncogene-induced genomic instability. Biophys Chem 2016; 225:49-57. [PMID: 28073589 DOI: 10.1016/j.bpc.2016.11.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 11/17/2016] [Accepted: 11/18/2016] [Indexed: 01/08/2023]
Abstract
Activating mutations in oncogenes promote uncontrolled proliferation and malignant transformation. Approximately 30% of human cancers carry mutations in the RAS oncogene. Paradoxically, expression of mutant constitutively active Ras protein in primary human cells results in a premature proliferation arrest known as oncogene-induced senescence (OIS). This is more commonly observed in human pre-neoplasia than in neoplastic lesions, and is considered a tumor suppressor mechanism. Senescent cells are still metabolically active but in a status of cell cycle arrest characterized by specific morphological and physiological features that distinguish them from both proliferating cells, and cells growth-arrested by other means. Although the molecular mechanisms by which OIS is established are not totally understood, the current view is that OIS in human cells is tightly linked to persistent activation of the DNA damage response (DDR) pathway, as a consequence of replication stress. Here we will highlight recent advances in our understanding of molecular mechanisms leading to hyper-replication stress in response to oncogene activation, and of the crosstalk between replication stress and persistent activation of the DDR. We will also discuss new evidence for DNA repair deficiencies during OIS, which might increase the genomic instability that drives senescence bypass and malignant transformation.
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Affiliation(s)
- Simona Graziano
- Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO 63104, USA
| | - Susana Gonzalo
- Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO 63104, USA.
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Graziano S, Johnston R, Deng O, Zhang J, Gonzalo S. Vitamin D/vitamin D receptor axis regulates DNA repair during oncogene-induced senescence. Oncogene 2016; 35:5362-5376. [PMID: 27041576 PMCID: PMC5050051 DOI: 10.1038/onc.2016.77] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 01/26/2016] [Accepted: 02/19/2016] [Indexed: 12/22/2022]
Abstract
Oncogenic Ras expression is associated with activation of the DNA damage response (DDR) pathway, as evidenced by elevated DNA damage, primarily DNA double-strand breaks (DSBs), and activation of DNA damage checkpoints, which in primary human cells leads to entry into senescence. DDR activation is viewed as a physiological barrier against uncontrolled proliferation in oncogenic Ras-expressing cells, and arises in response to genotoxic stress due to the production of reactive oxygen species (ROS) that damage DNA, and to hyper-replication stress. Although oncogene-induced senescence (OIS) is considered a tumor suppressor mechanism, the accumulation of DNA damage in senescent cells is thought to cause genomic instability, eventually allowing secondary hits in the genome that promote tumorigenesis. To date, the molecular mechanisms behind DNA repair defects during OIS remain poorly understood. Here, we show that oncogenic Ras expression in human primary cells results in down-regulation of BRCA1 and 53BP1, two key factors in DNA DSBs repair by homologous recombination (HR) and non-homologous end joining (NHEJ), respectively. As a consequence, Ras-induced senescent cells are hindered in their ability to recruit BRCA1 and 53BP1 to DNA damage sites. While BRCA1 is down-regulated at transcripts levels, 53BP1 loss is caused by activation of cathepsin L (CTSL)-mediated degradation of 53BP1 protein. Moreover, we discovered a marked down-regulation of vitamin D receptor (VDR) during OIS, and a role for the vitamin D/VDR axis regulating the levels of these DNA repair factors during OIS. This study reveals a new functional relationship between the oncogene Ras, the vitamin D/VDR axis, and the expression of DNA repair factors, in the context of OIS. The observed deficiencies in DNA repair factors in senescent cells could contribute to the genomic instability that allows senescence bypass and tumorigenesis.
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Affiliation(s)
- S Graziano
- Edward A. Doisy Department of Biochemistry and Molecular Biology, St Louis University School of Medicine, St Louis, MO, USA
| | - R Johnston
- Edward A. Doisy Department of Biochemistry and Molecular Biology, St Louis University School of Medicine, St Louis, MO, USA
| | - O Deng
- Department of Radiation Oncology, School of Medicine Case Western Reserve University, Cleveland, OH, USA
| | - J Zhang
- Department of Radiation Oncology, School of Medicine Case Western Reserve University, Cleveland, OH, USA
| | - S Gonzalo
- Edward A. Doisy Department of Biochemistry and Molecular Biology, St Louis University School of Medicine, St Louis, MO, USA
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Buratta S, Urbanelli L, Ferrara G, Sagini K, Goracci L, Emiliani C. A role for the autophagy regulator Transcription Factor EB in amiodarone-induced phospholipidosis. Biochem Pharmacol 2015; 95:201-9. [DOI: 10.1016/j.bcp.2015.03.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 03/31/2015] [Indexed: 12/17/2022]
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Ahn DG, Sharif T, Chisholm K, Pinto DM, Gujar SA, Lee PWK. Ras transformation results in cleavage of reticulon protein Nogo-B that is associated with impairment of IFN response. Cell Cycle 2015; 14:2301-10. [PMID: 25946643 DOI: 10.1080/15384101.2015.1044187] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Dysregulation of Ras signaling is the major cause of various cancers. Aberrant Ras signaling, however, provides a favorable environment for many viruses, making them suitable candidates as cancer-killing therapeutic agents. Susceptibility of cancer cells to such viruses is mainly due to impaired type I interferon (IFN) response, often as a result of activated Ras/ERK signaling in these cells. In this study, we searched for cellular factors modulated by Ras signaling and their potential involvement in promoting viral oncolysis. We found that upon Ras transformation of NIH-3T3 cells, the N-terminus of Nogo-B (reticulon 4) was proteolytically cleaved. Interestingly, Nogo knockdown (KD) in non-transformed and Ras-transformed cells both enhanced virus-induced IFN response, suggesting that both cleaved and uncleaved Nogo can suppress IFN response. However, pharmacological blockade of Nogo cleavage in Ras-transformed cells significantly enhanced virus-induced IFN response, suggesting that cleaved Nogo contributes to enhanced IFN suppression in these cells. We further showed that IFN suppression associated with Ras-induced Nogo-B cleavage was distinct from but synergistic with that associated with an activated Ras/ERK pathway. Our study therefore reveals an important and novel role of Nogo-B and its cleavage in the suppression of anti-viral immune responses by oncogenic Ras transformation.
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Affiliation(s)
- Dae-Gyun Ahn
- a Department of Microbiology and Immunology ; Dalhousie University ; Halifax , Nova Scotia , Canada
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Urbanelli L, Magini A, Ercolani L, Sagini K, Polchi A, Tancini B, Brozzi A, Armeni T, Principato G, Emiliani C. Oncogenic H-Ras up-regulates acid β-hexosaminidase by a mechanism dependent on the autophagy regulator TFEB. PLoS One 2014; 9:e89485. [PMID: 24586816 PMCID: PMC3933543 DOI: 10.1371/journal.pone.0089485] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Accepted: 01/21/2014] [Indexed: 11/19/2022] Open
Abstract
The expression of constitutively active H-RasV12 oncogene has been described to induce proliferative arrest and premature senescence in many cell models. There are a number of studies indicating an association between senescence and lysosomal enzyme alterations, e.g. lysosomal β-galactosidase is the most widely used biomarker to detect senescence in cultured cells and we previously reported that H-RasV12 up-regulates lysosomal glycohydrolases enzymatic activity in human fibroblasts. Here we investigated the molecular mechanisms underlying lysosomal glycohydrolase β-hexosaminidase up-regulation in human fibroblasts expressing the constitutively active H-RasV12. We demonstrated that H-Ras activation increases β-hexosaminidase expression and secretion by a Raf/extracellular signal-regulated protein kinase dependent pathway, through a mechanism that relies on the activity of the transcription factor EB (TFEB). Because of the pivotal role of TFEB in the regulation of lysosomal system biogenesis and function, our results suggest that this could be a general mechanism to enhance lysosomal enzymes activity during oncogene-induced senescence.
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Affiliation(s)
- Lorena Urbanelli
- Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
- * E-mail: (CE); (LU)
| | - Alessandro Magini
- Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
- Department of Medical and Biological Sciences (DSMB), University of Udine, Udine, Italy
| | - Luisa Ercolani
- Department of Clinical Sciences, Section of Biochemistry, Biology and Physics, Marche Polytechnic University, Ancona, Italy
| | - Krizia Sagini
- Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
| | - Alice Polchi
- Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
| | - Brunella Tancini
- Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
| | - Alessandro Brozzi
- Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
- Centro di Eccellenza sui Materiali Innovativi Nanostrutturati (CEMIN), University of Perugia, Perugia, Italy
| | - Tatiana Armeni
- Department of Clinical Sciences, Section of Biochemistry, Biology and Physics, Marche Polytechnic University, Ancona, Italy
| | - Giovanni Principato
- Department of Clinical Sciences, Section of Biochemistry, Biology and Physics, Marche Polytechnic University, Ancona, Italy
| | - Carla Emiliani
- Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
- Centro di Eccellenza sui Materiali Innovativi Nanostrutturati (CEMIN), University of Perugia, Perugia, Italy
- * E-mail: (CE); (LU)
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Jabre R, Sandekian V, Lemay G. Amino acid substitutions in σ1 and μ1 outer capsid proteins are selected during mammalian reovirus adaptation to Vero cells. Virus Res 2013; 176:188-98. [DOI: 10.1016/j.virusres.2013.06.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 05/30/2013] [Accepted: 06/14/2013] [Indexed: 12/11/2022]
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