1
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Yuan X, Zhang W, He Y, Yuan J, Song D, Chen H, Qin W, Qian X, Yu H, Guo Z. Proteomic analysis of cisplatin- and oxaliplatin-induced phosphorylation in proteins bound to Pt-DNA adducts. Metallomics 2020; 12:1834-1840. [PMID: 33151228 DOI: 10.1039/d0mt00194e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Cisplatin and oxaliplatin are widely used anti-tumour chemotherapeutic agents with different spectra of activity. The therapeutic efficacy of such platinum-based drug is believed to, at least in part, result from formation of Pt-DNA adducts, followed by DNA damage response and ultimately apoptosis. However, it remains unclear whether these DNA lesions caused by cisplatin and oxaliplatin elicit distinct reactions in cellular signaling pathways. Here, a label-free comparative proteomic study was performed to profile the protein phosphorylation patterns using Pt-DNA probes with different ligand identities and geometries. Phosphorylated proteins recognizing different cisplatin- and oxaliplatin-DNA lesions were enriched and analyzed on LC-MS/MS. Proteomic analysis revealed that cisplatin mainly affected proteins involved in mRNA processing, while chromatin organization and rRNA processing are two major biological processes influenced by oxaliplatin. Changes to site-specific phosphorylation levels of two proteins YBX1 and UBF1 were also validated by Western blotting. In particular, platinum drug treatment in colon and liver cancer cell lines down-regulated S484 phosphorylation of UBF1, which is an essential transcription factor responsible for ribosomal DNA transcription activation, implying that inhibition of ribosome biogenesis might be involved in the cytotoxic mechanism of platinum drugs. Collectively, these results directly reflected distinct protein phosphorylation patterns triggered by cisplatin and oxaliplatin, and could also provide valuable resources for future mechanistic studies of platinum-based anti-tumour agents.
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Affiliation(s)
- Xin Yuan
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Chemistry and Biomedicine Innovation Center, Nanjing University, Nanjing 210023, P. R. China.
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2
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Gunda V, Pathania AS, Chava S, Prathipati P, Chaturvedi NK, Coulter DW, Pandey MK, Durden DL, Challagundla KB. Amino Acids Regulate Cisplatin Insensitivity in Neuroblastoma. Cancers (Basel) 2020; 12:cancers12092576. [PMID: 32927667 PMCID: PMC7563727 DOI: 10.3390/cancers12092576] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/08/2020] [Accepted: 09/08/2020] [Indexed: 02/07/2023] Open
Abstract
Simple Summary Neuroblastomas mostly show poor response to the Cisplatin therapy. Amino acids serve as building blocks for proteins, which are acquired either through diet or protein breakdown. Our study reveals high amino acid pools and dependence of Cisplatin-tolerant neuroblastomas cells on amino acids for their survival, especially, in drug treated conditions. Our study also demonstrates that response of neuroblastomas to Cisplatin can be improved by decreasing cellular amino acid levels either by reducing amino acid supplements or by applying autophagy inhibitor, Hydroxychloroquine. Thus, our findings establish that neuroblastomas can be sensitized to Cisplatin by targeting amino acid metabolism. Abstract Neuroblastoma are pediatric, extracranial malignancies showing alarming survival prognosis outcomes due to their resilience to current aggressive treatment regimens, including chemotherapies with cisplatin (CDDP) provided in the first line of therapy regimens. Metabolic deregulation supports tumor cell survival in drug-treated conditions. However, metabolic pathways underlying cisplatin-resistance are least studied in neuroblastoma. Our metabolomics analysis revealed that cisplatin-insensitive cells alter their metabolism; especially, the metabolism of amino acids was upregulated in cisplatin-insensitive cells compared to the cisplatin-sensitive neuroblastoma cell line. A significant increase in amino acid levels in cisplatin-insensitive cells led us to hypothesize that the mechanisms upregulating intracellular amino acid pools facilitate insensitivity in neuroblastoma. We hereby report that amino acid depletion reduces cell survival and cisplatin-insensitivity in neuroblastoma cells. Since cells regulate their amino acids levels through processes, such as autophagy, we evaluated the effects of hydroxychloroquine (HCQ), a terminal autophagy inhibitor, on the survival and amino acid metabolism of cisplatin-insensitive neuroblastoma cells. Our results demonstrate that combining HCQ with CDDP abrogated the amino acid metabolism in cisplatin-insensitive cells and sensitized neuroblastoma cells to sub-lethal doses of cisplatin. Our results suggest that targeting of amino acid replenishing mechanisms could be considered as a potential approach in developing combination therapies for treating neuroblastomas.
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Affiliation(s)
- Venugopal Gunda
- Department of Biochemistry and Molecular Biology & The Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA; (V.G.); (A.S.P.); (S.C.)
| | - Anup S. Pathania
- Department of Biochemistry and Molecular Biology & The Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA; (V.G.); (A.S.P.); (S.C.)
| | - Srinivas Chava
- Department of Biochemistry and Molecular Biology & The Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA; (V.G.); (A.S.P.); (S.C.)
| | - Philip Prathipati
- Laboratory of Bioinformatics, National Institutes of Biomedical Innovation, Health and Nutrition, 7-6-8 Saito-Asagi, Ibaraki City, Osaka 567-0085, Japan;
| | - Nagendra K. Chaturvedi
- Department of Pediatrics, Division of Hematology/Oncology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (N.K.C.); (D.W.C.)
| | - Don W. Coulter
- Department of Pediatrics, Division of Hematology/Oncology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (N.K.C.); (D.W.C.)
| | - Manoj K. Pandey
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, 401 South Broadway, Camden, NJ 08103, USA;
| | - Donald L. Durden
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Moores Cancer Center, University of California, San Diego, 3855 Health Science Drive, MC-0815, La Jolla, CA 92093, USA;
- SignalRx Pharmaceuticals, Inc. 8330, Loveland Drive, Omaha, NE 68124, USA
| | - Kishore B. Challagundla
- Department of Biochemistry and Molecular Biology & The Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA; (V.G.); (A.S.P.); (S.C.)
- The Children’s Health Research Institute, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Correspondence: ; Tel.: +1-402-559-9032
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3
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Zhang C, Xiong X, Li Y, Huang K, Liu L, Peng X, Weng W. Cytokine-induced killer cells/natural killer cells combined with anti-GD2 monoclonal antibody increase cell death rate in neuroblastoma SK-N-SH cells. Oncol Lett 2019; 18:6525-6535. [PMID: 31807172 PMCID: PMC6876305 DOI: 10.3892/ol.2019.11020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 06/05/2019] [Indexed: 12/14/2022] Open
Abstract
Neuroblastoma (NB) is one of the most common extracranial, solid, pediatric malignancies. Despite improvements in conventional therapies, including surgery, chemotherapy and radiation therapy, the prognosis of stage IV NB remains poor, indicating that novel treatment strategies are required. Immunotherapies, such as anti-GD2 monoclonal antibodies, used alone or in combination with cytokines, and peripheral blood mononuclear cells or cord blood mononuclear cells (CBMNCs), have been indicated to cause NB cell death and to prolong patient survival in high-risk NB; however, they remain limited by severe cytotoxicity and side effects. In the present study, it was determined that anti-GD2 monoclonal antibody alone or CBMNC-isolated cytokine-induced killer (CIK)/natural killer (NK) cells alone significantly induced cell death of NB SK-N-SH cells, and the combination of anti-GD2 antibody and CIK/NK cells could significantly increase the cell death rate compared with either treatment alone. In addition, based on a method referred to our previous study, it was identified that a two-cytokine culture system, using interleukin IL-2 and IL-7, effectively stimulated the proliferation of CIK/NK cells. These results serve to suggest a novel treatment strategy for relapsed/refractory NB with high efficiency and few side effects.
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Affiliation(s)
- Chi Zhang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China.,Department of Pediatric Hematology/Oncology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Xilin Xiong
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China.,Department of Pediatric Hematology/Oncology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Yang Li
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China.,Department of Pediatric Hematology/Oncology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Ke Huang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China.,Department of Pediatric Hematology/Oncology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Ling Liu
- Department of Pediatrics, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong 524000, P.R. China
| | - Xiaomin Peng
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China.,Department of Pediatric Hematology/Oncology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Wenjun Weng
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China.,Department of Pediatric Hematology/Oncology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
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4
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Rodríguez-Ulloa A, Ramos Y, Sánchez-Puente A, Perera Y, Musacchio-Lasa A, Fernández-de-Cossio J, Padrón G, López LJ, Besada V, Perea SE. The Combination of the CIGB-300 Anticancer Peptide and Cisplatin Modulates Proteins Related to Cell Survival, DNA Repair and Metastasis in a Lung Cancer Cell Line Model. CURR PROTEOMICS 2019. [DOI: 10.2174/1570164616666190126104325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
CIGB-300 is a pro-apoptotic peptide that abrogates CK2-mediated phosphorylation,
and can elicit synergistic interaction in vitro and in vivo when combined with certain anticancer
drugs.
Objective:
The combination of CIGB-300 with cisplatin is studied through data mining and expressionbased
proteomics to reveal the molecular basis of this interaction. Cisplatin resistance-associated proteins,
which have also been reported as CK2 substrates, were first identified by bioinformatic analyses.
Methods:
Data from these analyses suggested that the cisplatin resistance phenotype could be directly
improved by inhibiting CK2 phosphorylation on specific substrates. Furthermore, 157 proteins were
differentially modulated on the NCI-H125 lung cancer cell line in response to CIGB-300, cisplatin or
both drugs as determined by LC-MS/MS.
Results:
The expression of 28 cisplatin resistance-associated proteins was changed when cisplatin was
combined with CIGB-300. Overall, the proteins identified are also related to cell survival, cell proliferation
and metastasis. Furthermore, the CIGB-300 regulated proteome revealed proteins that were initially
involved in the mechanism of action of CIGB-300 and cisplatin as single agents.
Conclusion:
This is the first report describing the protein array modulated by combining CIGB-300
and cisplatin that will support the rationale for future clinical settings based on a multi-target cancer
therapy.
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Affiliation(s)
| | - Yassel Ramos
- Department of Proteomics, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Aniel Sánchez-Puente
- Department of Proteomics, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Yasser Perera
- Laboratory of Molecular Oncology, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Alexis Musacchio-Lasa
- Department of Bioinformatics, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | | | - Gabriel Padrón
- Department of Proteomics, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Luis J.G. López
- Department of Proteomics, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Vladimir Besada
- Department of Proteomics, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Silvio E. Perea
- Laboratory of Molecular Oncology, Center for Genetic Engineering and Biotechnology, Havana, Cuba
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5
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Pre-application of arsenic trioxide may potentiate cytotoxic effects of vinorelbine/docetaxel on neuroblastoma SK-N-SH cells. Biomed Pharmacother 2019; 113:108665. [PMID: 30889490 DOI: 10.1016/j.biopha.2019.108665] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/25/2019] [Accepted: 02/04/2019] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Arsenic trioxide is effective in the treatment of acute promyelocytic leukemia and is currently in use in clinical trials for the treatment of solid tumor types. Given that arsenic trioxide is able to arrest neuroblastoma cell cycle in the G2/M phase, the present study is, to the best of our knowledge, the first to investigate whether the combination of arsenic trioxide with mitosis-phase-specific antineoplastic agents (vinorelbine or docetaxel) or non-mitosis-phase-specific antineoplastic agents (etoposide or cisplatin) exert synergistic effects in cytotoxicity on the human SK-N-SH neuroblastoma cell line. METHODS Neuroblastoma cells were either incubated with one of the four drugs individually, or preincubated with arsenic trioxide and then followed by another drug when cell cycle was arrested at the G2/M phase with the highest proportion. RESULTS The results of the present study revealed that arsenic trioxide potentiated the apoptotic rate of neuroblastoma cells induced by chemotherapeutic drugs. The present study further demonstrated that preincubation with arsenic trioxide followed by a mitosis-phase-specific antineoplastic agent result in a higher cytotoxicity effect compared with a non mitosis-phase-specific antineoplastic agent. Along with the enhanced cytotoxicity in combination group, the cell cycle distribution demonstrated a decreased proportion of G2/M phase in the combination group. CONCLUSION The in vitro study revealed that the pre-application of arsenic trioxide followed by mitosis-phase-specific antineoplastic agents potentiate the cytotoxic effects on neuroblastoma cells, therefore arsenic trioxide may be a promising therapeutic option for treating neuroblastoma.
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6
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Rodrigo MAM, Buchtelova H, Jimenez AMJ, Adam P, Babula P, Heger Z, Adam V. Transcriptomic Landscape of Cisplatin-Resistant Neuroblastoma Cells. Cells 2019; 8:E235. [PMID: 30871063 PMCID: PMC6469049 DOI: 10.3390/cells8030235] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/06/2019] [Accepted: 03/08/2019] [Indexed: 12/11/2022] Open
Abstract
The efficiency of cisplatin (CDDP) is significantly hindered by the development of resistance during the treatment course. To gain a detailed understanding of the molecular mechanisms underlying the development of cisplatin resistance, we comparatively analyzed established a CDDP-resistant neuroblastoma cell line (UKF-NB-4CDDP) and its susceptible parental cells (UKF-NB-4). We verified increased chemoresistance of UKF-NB-4CDDP cells by analyzing the viability, induction of apoptosis and clonal efficiency. To shed more light on this phenomenon, we employed custom cDNA microarray (containing 2234 probes) to perform parallel transcriptomic profiling of RNA and identified that 139 genes were significantly up-regulated due to CDDP chemoresistance. The analyses of molecular pathways indicated that the top up-regulation scoring functions were response to stress, abiotic stimulus, regulation of metabolic process, apoptotic processes, regulation of cell proliferation, DNA repair or regulation of catalytic activity, which was also evidenced by analysis of molecular functions revealing up-regulation of genes encoding several proteins with a wide-spectrum of enzymatic activities. Functional analysis using lysosomotropic agents chloroquine and bafilomycin A1 validated their potential to re-sensitize UKF-NB-4CDDP cells to CDDP. Taken together, the identification of alterations in specific genes and pathways that contribute to CDDP chemoresistance may potentially lead to a renewed interest in the development of novel rational therapeutics and prognostic biomarkers for the management of CDDP-resistant neuroblastoma.
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Affiliation(s)
- Miguel Angel Merlos Rodrigo
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.
- Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic.
| | - Hana Buchtelova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.
| | - Ana Maria Jimenez Jimenez
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.
- Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic.
| | - Pavlina Adam
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.
| | - Petr Babula
- Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic.
- Department of Physiology, Faculty of Medicine, Masaryk University, Kamenice 753/5, CZ-625 00 Brno, Czech Republic.
| | - Zbynek Heger
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.
- Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic.
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.
- Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic.
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7
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The dietary flavonoid isoliquiritigenin is a potent cytotoxin for human neuroblastoma cells. Neuronal Signal 2019; 3:NS20180201. [PMID: 32269833 PMCID: PMC7104307 DOI: 10.1042/ns20180201] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 12/21/2018] [Accepted: 12/21/2018] [Indexed: 12/15/2022] Open
Abstract
Neuroblastoma (NB) is the most common extracranial solid tumor of early childhood; it accounts for approximately 8–10% of all childhood cancers and is the most common cancer in children in the first year of life. Patients in the high-risk group have a poor prognosis, with relapses being common and often refractory to drug treatment in those that survive. Moreover, the drug treatment itself can lead to a range of long-term sequelae. Therefore, there is a critical need to identify new therapeutics for NB. Isoliquiritigenin (ISLQ) is a naturally-occurring, dietary chalcone-type flavonoid with a range of biological effects that depend on the cell type and context. ISLQ has potential as an anticancer agent. Here we show that ISLQ has potent cytotoxic effects on SK-N-BE(2) and IMR-32 human NB cells, which carry amplification of the MYCN gene, the main prognostic marker of poor survival in NB. ISLQ was found to increase cellular reactive oxygen species (ROS). The cytotoxic effect of ISLQ was blocked by small molecule inhibitors of oxidative stress-induced cell death, and by the antioxidant N-acetyl-l-cysteine (NAC). Combined treatment of either SK-N-B-E(2) or IMR-32 cells with ISLQ and the anticancer agent cisplatin resulted in loss of cell viability that was greater than that induced by cisplatin alone. This study provides proof-of-principle that ISLQ is a potent cytotoxin for MYCN-amplified human NB cells. This is an important first step in rationalizing the further study of ISLQ as a potential adjunct therapy for high-risk NB.
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8
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Merlos Rodrigo MA, Buchtelova H, de Los Rios V, Casal JI, Eckschlager T, Hrabeta J, Belhajova M, Heger Z, Adam V. Proteomic Signature of Neuroblastoma Cells UKF-NB-4 Reveals Key Role of Lysosomal Sequestration and the Proteasome Complex in Acquiring Chemoresistance to Cisplatin. J Proteome Res 2019; 18:1255-1263. [PMID: 30592607 DOI: 10.1021/acs.jproteome.8b00867] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cisplatin (CDDP) is a widely used agent in the treatment of neuroblastoma. Unfortunately, the development of acquired chemoresistance limits its clinical use. To gain a detailed understanding of the mechanisms underlying the development of such chemoresistance, we comparatively analyzed established cisplatin-resistant neuroblastoma cell line (UKF-NB-4CDDP) and its sensitive counterpart (UKF-NB-4). First, using viability screenings, we confirmed the decreased sensitivity of tested cells to cisplatin and identified a cross-resistance to carboplatin and oxaliplatin. Then, the proteomic signatures were analyzed using nano liquid chromatography with tandem mass spectrometry. Among the proteins responsible for UKF-NB-4CDDP chemoresistance, ion channels transport family proteins, ATP-binding cassette superfamily proteins (ATP = adenosine triphosphate), solute carrier-mediated trans-membrane transporters, proteasome complex subunits, and V-ATPases were identified. Moreover, we detected markedly higher proteasome activity in UKF-NB-4CDDP cells and a remarkable lysosomal enrichment that can be inhibited by bafilomycin A to sensitize UKF-NB-4CDDP to CDDP. Our results indicate that lysosomal sequestration and proteasome activity may be one of the key mechanisms responsible for intrinsic chemoresistance of neuroblastoma to CDDP.
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Affiliation(s)
- Miguel Angel Merlos Rodrigo
- Department of Chemistry and Biochemistry , Mendel University in Brno , Zemedelska 1 , 613 00 Brno , Czech Republic.,Central European Institute of Technology , Brno University of Technology , Purkynova 123 , 612 00 Brno , Czech Republic
| | - Hana Buchtelova
- Department of Chemistry and Biochemistry , Mendel University in Brno , Zemedelska 1 , 613 00 Brno , Czech Republic.,Central European Institute of Technology , Brno University of Technology , Purkynova 123 , 612 00 Brno , Czech Republic
| | - Vivian de Los Rios
- Functional Proteomics, Department of Molecular Biomedicine and Proteomic Facility , Centro de Investigaciones Biológicas , Ramiro de Maeztu 9 , Madrid 280 40 , Spain
| | - José Ignacio Casal
- Functional Proteomics, Department of Molecular Biomedicine and Proteomic Facility , Centro de Investigaciones Biológicas , Ramiro de Maeztu 9 , Madrid 280 40 , Spain
| | - Tomas Eckschlager
- Department of Paediatric Haematology and Oncology, 2nd Faculty of Medicine , Charles University, and University Hospital Motol , V Uvalu 84 , 150 06 Prague 5 , Czech Republic
| | - Jan Hrabeta
- Department of Paediatric Haematology and Oncology, 2nd Faculty of Medicine , Charles University, and University Hospital Motol , V Uvalu 84 , 150 06 Prague 5 , Czech Republic
| | - Marie Belhajova
- Department of Paediatric Haematology and Oncology, 2nd Faculty of Medicine , Charles University, and University Hospital Motol , V Uvalu 84 , 150 06 Prague 5 , Czech Republic
| | - Zbynek Heger
- Department of Chemistry and Biochemistry , Mendel University in Brno , Zemedelska 1 , 613 00 Brno , Czech Republic.,Central European Institute of Technology , Brno University of Technology , Purkynova 123 , 612 00 Brno , Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry , Mendel University in Brno , Zemedelska 1 , 613 00 Brno , Czech Republic.,Central European Institute of Technology , Brno University of Technology , Purkynova 123 , 612 00 Brno , Czech Republic
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9
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Acioglu C, Tuzuner MB, Serhatli M, Acilan C, Sahin B, Akgun E, Adiguzel Z, Gurel B, Baykal AT. A Proteomic Analysis of Mitochondrial Complex III Inhibition in SH-SY5Y Human Neuroblastoma Cell Line. CURR PROTEOMICS 2019. [DOI: 10.2174/1570164615666180713110139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background and Objective: Antimycin A (AntA) is a potent Electron Transport System (ETS) inhibitor exerting its effect through inhibiting the transfer of the electrons by binding to the quinone reduction site of the cytochrome bc1 complex (Complex III), which is known to be impaired in Huntington’s Disease (HD). The current studies were undertaken to investigate the effect of complex III inhibition in the SH-SY5Y cell line to delineate the molecular and cellular processes, which may play a role in the pathogenesis of HD.
Methods:
We treated SH-SY5Y neuroblastoma cells with AntA in order to establish an in vitro mitochondrial dysfunction model for HD. Differential proteome analysis was performed by the nLCMS/ MS system. Protein expression was assessed by western blot analysis.
Results:
Thirty five differentially expressed proteins as compared to the vehicle-treated controls were detected. Functional pathway analysis indicated that proteins involved in ubiquitin-proteasomal pathway were up-regulated in AntA-treated SH-SY5Y neuroblastoma cells and the ubiquitinated protein accumulation was confirmed by immunoblotting. We found that Prothymosin α (ProT α) was downregulated. Furthermore, we demonstrated that nuclear factor erythroid 2-related factor 2 (Nrf2) protein expression was co-regulated with ProT α expression, hence knockdown of ProT α in SH-SY5Y cells decreased Nrf2 protein level.
Conclusion:
Our findings suggest that complex III impairment might downregulate ubiquitinproteasome function and NRF2/Keap1 antioxidant response. In addition, it is likely that downregulation of Nrf2 is due to the decreased expression of ProT α in AntA-treated SH-SY5Y cells. Our results could advance the understanding of mechanisms involved in neurodegenerative diseases.
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Affiliation(s)
- Cigdem Acioglu
- Department of Neurological Surgery, Reynolds Family Spine Laboratory, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, United States
| | - Mete Bora Tuzuner
- Research and Development Center, Acibadem Labmed Medical Laboratories, Istanbul, Turkey
| | - Muge Serhatli
- TUBITAK, Marmara Research Center, Genetic Engineering and Biotechnology Institute, 41470, Gebze, Kocaeli, Turkey
| | - Ceyda Acilan
- School of Medicine, Research Center for Translational Medicine, Koc University, Istanbul, Turkey
| | - Betul Sahin
- Research and Development Center, Acibadem Labmed Medical Laboratories, Istanbul, Turkey
| | - Emel Akgun
- Research and Development Center, Acibadem Labmed Medical Laboratories, Istanbul, Turkey
| | - Zelal Adiguzel
- TUBITAK, Marmara Research Center, Genetic Engineering and Biotechnology Institute, 41470, Gebze, Kocaeli, Turkey
| | - Busra Gurel
- Department of Medical Biochemistry, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Ahmet Tarik Baykal
- Department of Medical Biochemistry, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
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10
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Jarman PJ, Noakes F, Fairbanks S, Smitten K, Griffiths IK, Saeed HK, Thomas JA, Smythe C. Exploring the Cytotoxicity, Uptake, Cellular Response, and Proteomics of Mono- and Dinuclear DNA Light-Switch Complexes. J Am Chem Soc 2018; 141:2925-2937. [DOI: 10.1021/jacs.8b09999] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Paul J. Jarman
- Department of Biomedical Science, University of Sheffield, Sheffield S10 2TN, U.K
| | - Felicity Noakes
- Department of Biomedical Science, University of Sheffield, Sheffield S10 2TN, U.K
- Department of Chemistry, University of Sheffield, Sheffield S10 2TN, U.K
| | - Simon Fairbanks
- Department of Chemistry, University of Sheffield, Sheffield S10 2TN, U.K
| | - Kirsty Smitten
- Department of Chemistry, University of Sheffield, Sheffield S10 2TN, U.K
| | | | - Hiwa K. Saeed
- Department of Chemistry, University of Sheffield, Sheffield S10 2TN, U.K
| | - Jim A. Thomas
- Department of Chemistry, University of Sheffield, Sheffield S10 2TN, U.K
| | - Carl Smythe
- Department of Biomedical Science, University of Sheffield, Sheffield S10 2TN, U.K
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Wang HB, Li T, Ma DZ, Zhi H. ERα36 gene silencing promotes tau protein phosphorylation, inhibits cell proliferation, and induces apoptosis in human neuroblastoma SH-SY5Y cells. FASEB J 2018; 32:fj201701386. [PMID: 29932870 DOI: 10.1096/fj.201701386] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Neuroblastoma is the most common cancer in infants and the third most common cancer in children after leukemia and brain cancer. The purpose of our study was to investigate the effects of estrogen receptor (ER)-α36 gene silencing on tau protein phosphorylation, cell proliferation, and cell apoptosis in human neuroblastoma SH-SY5Y cells. SH-SY5Y cells were treated with estrogen or left untreated, to investigate the effects of estrogen stimulation on ERα36 and the ERK/protein B kinase (AKT) signaling pathway. ERα36 mRNA expressions were detected by quantitative RT-PCR. A phosphatase kit was used to test protein phosphatase (PP)-2A activity before and after treatment. Western blot analysis was conducted to detect protein expression of ERα36; tau protein; phosphorylated- tau (p-tau) at site Thr231 [p-tau (Thr231)]; glycogen synthase kinase (GSK)3β and its specificity sites (Tyr216 and Ser9); Cyclin Dl; proliferating cell nuclear antigen (PCNA); B-cell lymphoma (Bcl)-2; and Bcl-2-associated X protein (Bax). A cell-counting kit (CCK)-8 assay was used to determine cell viability. Cell apoptosis and rate of tumor growth and volume were determined by Annexin V-FITC/PI staining and a xenotransplanted tumor model in nude mice. Results show that without estrogen stimulation, ERα36 was inactivated. When stimulated by estrogen, expression of ERα36, PP2A, p-GSK3β (Ser9)/total protein ( t)-GSK3β, Cyclin Dl, PCNA, and Bcl-2 were up-regulated, and p-GSK3β (Tyr216)/ t-GSK3β expression was down-regulated, as was p-tau (Thr231) and Bax expression. The expression of p-ERK/ERK, p-AKT/AKT, p-methyl ethyl ketone (MEK)/MEK, and p-mammalian target of rapamycin (mTOR)/mTOR expression was up-regulated, suggesting that the ERK/AKT signaling pathway is activated. Cell proliferation was also accelerated, whereas apoptosis was inhibited with stimulation by estrogen. However, we found that the effects of silencing ERα36 on the expression of related intracellular factors had no association with estrogen. Our study demonstrates that ERα36 gene silencing can inhibit the activation of the ERK/AKT signaling pathway, increase tau protein phosphorylation, decrease cell vitality and tumorigenicity, and promote apoptosis of human neuroblastoma SH-SY5Y cells.-Wang, H.-B., Li, T., Ma, D.-Z., Zhi, H. ERα36 gene silencing promotes tau protein phosphorylation, inhibits cell proliferation, and induces apoptosis in human neuroblastoma SH-SY5Y cells.
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Affiliation(s)
- Hong-Bin Wang
- Department of Neurosurgery, Affiliated Hospital, Hebei University of Engineering, Handan, China
| | - Tao Li
- Department of Neurosurgery, Affiliated Hospital, Hebei University of Engineering, Handan, China
| | - Dong-Zhou Ma
- Department of Neurosurgery, Affiliated Hospital, Hebei University of Engineering, Handan, China
| | - Hua Zhi
- Department of Cardiology, Affiliated Hospital, Hebei University of Engineering, Handan, China
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Sahoo S, Podder S, Garai A, Majumdar S, Mukherjee N, Basu U, Nandi D, Chakravarty AR. Iron(III) Complexes of Vitamin B6
Schiff Base with Boron-Dipyrromethene Pendants for Lysosome-Selective Photocytotoxicity. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701487] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Somarupa Sahoo
- Department of Inorganic and Physical Chemistry; Indian Institute of Science; 560012 Bangalore Karnataka India
| | - Santosh Podder
- Department of Biochemistry; Indian Institute of Science; 560012 Bangalore Karnataka India
| | - Aditya Garai
- Department of Inorganic and Physical Chemistry; Indian Institute of Science; 560012 Bangalore Karnataka India
| | - Shamik Majumdar
- Department of Biochemistry; Indian Institute of Science; 560012 Bangalore Karnataka India
| | - Nandini Mukherjee
- Department of Inorganic and Physical Chemistry; Indian Institute of Science; 560012 Bangalore Karnataka India
| | - Uttara Basu
- Department of Inorganic and Physical Chemistry; Indian Institute of Science; 560012 Bangalore Karnataka India
| | - Dipankar Nandi
- Department of Biochemistry; Indian Institute of Science; 560012 Bangalore Karnataka India
| | - Akhil R. Chakravarty
- Department of Inorganic and Physical Chemistry; Indian Institute of Science; 560012 Bangalore Karnataka India
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13
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Use of Ferritin-Based Metal-Encapsulated Nanocarriers as Anticancer Agents. APPLIED SCIENCES-BASEL 2017. [DOI: 10.3390/app7010101] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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14
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ŞAHİN B, BAYKAL AT. Proteomics analysis of mitochondrial dysfunction triggered by complex specific electron transport chain inhibitors reveals common pathways involving protein misfolding in an SH-SY5Y in vitro cell model. Turk J Biol 2017. [DOI: 10.3906/biy-1702-44] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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15
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Liu L, Li Y, Xiong X, Qi K, Zhang C, Fang J, Guo H. Low dose of arsenic trioxide inhibits multidrug resistant-related P-glycoprotein expression in human neuroblastoma cell line. Int J Oncol 2016; 49:2319-2330. [PMID: 27840903 DOI: 10.3892/ijo.2016.3756] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Accepted: 08/22/2016] [Indexed: 11/06/2022] Open
Abstract
This study investigated arsenic trioxide (As2O3), cisplatin (DDP) and etoposide (Vp16) on the anticancer effects and P-glycoprotein (P-gp) expression in neuroblastoma (NB) SK-N-SH cells. The potential influence of As2O3, DDP and Vp16 currently included in NB routine treatment protocols on cytotoxicity in SK-N-SH cells was measured by flow cytometry and drug half-maximal inhibitory concentration (IC50) was established. Moreover, chemotherapeutic agent-mediated changes of cellular expression levels of resistant-related P-gp, was monitored using western blotting. The data showed that As2O3, DDP and Vp16 significantly inhibited the growth and survival of the SK-N-SH cells at different concentration. Notably, the levels of apoptosis were upregulated in SK-N-SH cells with an acceleration of the exposure time and the concentration of As2O3, DDP and Vp16. As2O3, DDP and Vp16 were observed with their IC50 values on SK-N-SH cells being 3 µM, 8 and 100 µg/ml, respectively. Flow cytometry analysis showed that As2O3 at low concentrations in SK-N-SH cells led to enhanced accumulation of cell populations in G2/M phase with increasing the exposure time, and increased levels of apoptosis. In contrast, we observed that SK-N-SH cell populations arrested in S phase by DDP and Vp16. In vitro examination revealed that following pretreatment of SK-N-SH cells with As2O3, the expression of P-gp was not increased. The expression of P-gp downregulation were noted following the group treated by As2O3 at 2 and 3 µM. Exposed to As2O3 at 3 µM for 72 h, SK-N-SH cells exhibited lower expression of P-gp than 2 µM As2O3 for 72 h. In contrast, the expression of P-gp was upregulated by DDP and VP16. In summary, SK-N-SH cells were responsive to chemotherapeutic agent-induced apoptosis in a dose-dependent and time-dependent manner. In particular, ours findings showed that low dose of As2O3 markedly reduced the P-gp expression and increased apoptotic cell death in human NB cell line.
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Affiliation(s)
- Ling Liu
- Department of Pediatric, Affiliated Hospital of Guangdong Medical University, Zhan Jiang, Guangdong 524000, P.R. China
| | - Yang Li
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Xilin Xiong
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Kai Qi
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Chi Zhang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Jianpei Fang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Haixia Guo
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
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Cevik O, Baykal AT, Sener A. Platelets Proteomic Profiles of Acute Ischemic Stroke Patients. PLoS One 2016; 11:e0158287. [PMID: 27336623 PMCID: PMC4919045 DOI: 10.1371/journal.pone.0158287] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 06/13/2016] [Indexed: 12/20/2022] Open
Abstract
Platelets play a crucial role in the pathogenesis of stroke and antiplatelet agents exist for its treatment and prevention. Through the use of LC-MS based protein expression profiling, platelets from stroke patients were analyzed and then correlated with the proteomic analyses results in the context of this disease. This study was based on patients who post ischemic stroke were admitted to hospital and had venous blood drawn within 24 hrs of the incidence. Label-free protein expression analyses of the platelets' tryptic digest was performed in triplicate on a UPLC-ESI-qTOF-MS/MS system and ProteinLynx Global Server (v2.5, Waters) was used for tandem mass data extraction. The peptide sequences were searched against the reviewed homo sapiens database (www.uniprot.org) and the quantitation of protein variation was achieved through Progenesis LC-MS software (V4.0, Nonlinear Dynamics). These Label-free differential proteomics analysis of platelets ensured that 500 proteins were identified and 83 of these proteins were found to be statistically significant. The differentially expressed proteins are involved in various processes such as inflammatory response, cellular movement, immune cell trafficking, cell-to-cell signaling and interaction, hematological system development and function and nucleic acid metabolism. The expressions of myeloperoxidase, arachidonate 12-Lipoxygenase and histidine-rich glycoprotein are involved in cellular metabolic processes, crk-like protein and ras homolog gene family member A involved in cell signaling with vitronectin, thrombospondin 1, Integrin alpha 2b, and integrin beta 3 involved in cell adhesion. Apolipoprotein H, immunoglobulin heavy constant gamma 1 and immunoglobulin heavy constant gamma 3 are involved in structural, apolipoprotein A-I, and alpha-1-microglobulin/bikunin precursor is involved in transport, complement component 3 and clusterin is involved in immunity proteins as has been discussed. Our data provides an insight into the proteins that are involved in the platelets' activation response during ischemic stroke. It could be argued that this study lays the foundation for future mechanistic studies.
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Affiliation(s)
- Ozge Cevik
- Cumhuriyet University, Faculty of Pharmacy, Department of Biochemistry, Sivas, Turkey
- Marmara University, Faculty of Pharmacy, Department of Biochemistry, Istanbul, Turkey
- * E-mail:
| | - Ahmet Tarik Baykal
- Acibadem University, School of Medicine, Department of Medical Biochemistry, Istanbul, Turkey
| | - Azize Sener
- Marmara University, Faculty of Pharmacy, Department of Biochemistry, Istanbul, Turkey
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17
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Affinity purification-mass spectrometry analysis of bcl-2 interactome identified SLIRP as a novel interacting protein. Cell Death Dis 2016; 7:e2090. [PMID: 26866271 PMCID: PMC4849145 DOI: 10.1038/cddis.2015.357] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Revised: 11/04/2015] [Accepted: 11/04/2015] [Indexed: 02/06/2023]
Abstract
Members of the bcl-2 protein family share regions of sequence similarity, the bcl-2 homology (BH) domains. Bcl-2, the most studied member of this family, has four BH domains, BH1–4, and has a critical role in resistance to antineoplastic drugs by regulating the mitochondrial apoptotic pathway. Moreover, it is also involved in other relevant cellular processes such as tumor progression, angiogenesis and autophagy. Deciphering the network of bcl-2-interacting factors should provide a critical advance in understanding the different functions of bcl-2. Here, we characterized bcl-2 interactome by mass spectrometry in human lung adenocarcinoma cells. In silico functional analysis associated most part of the identified proteins to mitochondrial functions. Among them we identified SRA stem–loop interacting RNA-binding protein, SLIRP, a mitochondrial protein with a relevant role in regulating mitochondrial messenger RNA (mRNA) homeostasis. We validated bcl-2/SLIRP interaction by immunoprecipitation and immunofluorescence experiments in cancer cell lines from different histotypes. We showed that, although SLIRP is not involved in mediating bcl-2 ability to protect from apoptosis and oxidative damage, bcl-2 binds and stabilizes SLIRP protein and regulates mitochondrial mRNA levels. Moreover, we demonstrated that the BH4 domain of bcl-2 has a role in maintaining this binding.
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18
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Piskareva O, Harvey H, Nolan J, Conlon R, Alcock L, Buckley P, Dowling P, Henry M, O'Sullivan F, Bray I, Stallings RL. The development of cisplatin resistance in neuroblastoma is accompanied by epithelial to mesenchymal transition in vitro. Cancer Lett 2015; 364:142-55. [PMID: 25960282 DOI: 10.1016/j.canlet.2015.05.004] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Revised: 04/10/2015] [Accepted: 05/04/2015] [Indexed: 12/30/2022]
Abstract
Neuroblastoma is a challenging childhood malignancy, with a very high percentage of patients relapsing following acquisition of drug resistance, thereby necessitating the identification of mechanisms of drug resistance as well as new biological targets contributing to the aggressive pathogenicity of the disease. In order to investigate the molecular pathways that are involved with drug resistance in neuroblastoma, we have developed and characterised cisplatin resistant sublines SK-N-ASCis24, KellyCis83 and CHP-212Cis100, integrating data of cell behaviour, cytotoxicity, genomic alterations and modulation of protein expression. All three cisplatin resistant cell lines demonstrated cross resistance to temozolomide, etoposide and irinotecan, all of which are drugs in re-initiation therapy. Array CGH analysis indicated that resistant lines have acquired additional genomic imbalances. Differentially expressed proteins were identified by mass spectrometry and classified by bioinformatics tools according to their molecular and cellular functions and their involvement into biological pathways. Significant changes in the expression of proteins involved with pathways such as actin cytoskeletal signalling (p = 9.28E-10), integrin linked kinase (ILK) signalling (p = 4.01E-8), epithelial adherens junctions signalling (p = 5.49E-8) and remodelling of epithelial adherens junctions (p = 5.87E-8) pointed towards a mesenchymal phenotype developed by cisplatin resistant SK-N-ASCis24. Western blotting and confocal microscopy of MYH9, ACTN4 and ROCK1 coupled with invasion assays provide evidence that elevated levels of MYH9 and ACTN4 and reduced levels of ROCK1 contribute to the increased ROCK1-independent migratory potential of SK-N-ASCis24. Therefore, our results suggest that epithelial-to-mesenchymal transition is a feature during the development of drug resistance in neuroblastoma.
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Affiliation(s)
- Olga Piskareva
- Cancer Genetics Group, Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin 2, Ireland; Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin 12, Ireland.
| | - Harry Harvey
- Cancer Genetics Group, Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin 2, Ireland; Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin 12, Ireland
| | - John Nolan
- Cancer Genetics Group, Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin 2, Ireland; Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin 12, Ireland
| | - Ross Conlon
- Cancer Genetics Group, Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin 2, Ireland; Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin 12, Ireland
| | - Leah Alcock
- Cancer Genetics Group, Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin 2, Ireland
| | - Patrick Buckley
- Molecular Pathology Laboratory, Beaumont Hospital, Dublin 9, Ireland
| | - Paul Dowling
- Department of Biology, The National University of Ireland Maynooth, Maynooth, County Kildare, Ireland
| | | | - Finbarr O'Sullivan
- National Institute for Cellular Biotechnology, Dublin City University, Dublin 9, Ireland
| | - Isabella Bray
- Cancer Genetics Group, Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin 2, Ireland; Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin 12, Ireland
| | - Raymond L Stallings
- Cancer Genetics Group, Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin 2, Ireland; Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin 12, Ireland
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19
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Capuani B, Della-Morte D, Donadel G, Caratelli S, Bova L, Pastore D, De Canio M, D'Aguanno S, Coppola A, Pacifici F, Arriga R, Bellia A, Ferrelli F, Tesauro M, Federici M, Neri A, Bernardini S, Sbraccia P, Di Daniele N, Sconocchia G, Orlandi A, Urbani A, Lauro D. Liver protein profiles in insulin receptor-knockout mice reveal novel molecules involved in the diabetes pathophysiology. Am J Physiol Endocrinol Metab 2015; 308:E744-55. [PMID: 25714671 DOI: 10.1152/ajpendo.00447.2014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Accepted: 02/19/2015] [Indexed: 02/08/2023]
Abstract
Liver has a principal role in glucose regulation and lipids homeostasis. It is under a complex control by substrates such as hormones, nutrients, and neuronal impulses. Insulin promotes glycogen synthesis, lipogenesis, and lipoprotein synthesis and inhibits gluconeogenesis, glycogenolysis, and VLDL secretion by modifying the expression and enzymatic activity of specific molecules. To understand the pathophysiological mechanisms leading to metabolic liver disease, we analyzed liver protein patterns expressed in a mouse model of diabetes by proteomic approaches. We used insulin receptor-knockout (IR(-/-)) and heterozygous (IR(+/-)) mice as a murine model of liver metabolic dysfunction associated with diabetic ketoacidosis and insulin resistance. We evaluated liver fatty acid levels by microscopic examination and protein expression profiles by orthogonal experimental strategies using protein 2-DE MALDI-TOF/TOF and peptic nLC-MS/MS shotgun profiling. Identified proteins were then loaded into Ingenuity Pathways Analysis to find possible molecular networks. Twenty-eight proteins identified by 2-DE analysis and 24 identified by nLC-MS/MS shotgun were differentially expressed among the three genotypes. Bioinformatic analysis revealed a central role of high-mobility group box 1/2 and huntigtin never reported before in association with metabolic and related liver disease. A different modulation of these proteins in both blood and hepatic tissue further suggests their role in these processes. These results provide new insight into pathophysiology of insulin resistance and hepatic steatosis and could be useful in identifying novel biomarkers to predict risk for diabetes and its complications.
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Affiliation(s)
- Barbara Capuani
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - David Della-Morte
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy; IRCCS San Raffaele Pisana, Rome, Italy; and
| | - Giulia Donadel
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Sara Caratelli
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Luca Bova
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Donatella Pastore
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Michele De Canio
- Department of Experimental Medicine and Surgery, University of Rome Tor Vergata, Rome, Italy; Laboratory of Proteomics and Metabonomics, S. Lucia Foundation-Istituto Di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy
| | - Simona D'Aguanno
- Laboratory of Proteomics and Metabonomics, S. Lucia Foundation-Istituto Di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy
| | - Andrea Coppola
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Francesca Pacifici
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Roberto Arriga
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Alfonso Bellia
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy; Policlinico Tor Vergata Foundation, Rome, Italy
| | - Francesca Ferrelli
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Manfredi Tesauro
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy; Policlinico Tor Vergata Foundation, Rome, Italy
| | - Massimo Federici
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy; Policlinico Tor Vergata Foundation, Rome, Italy
| | - Anna Neri
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy; Policlinico Tor Vergata Foundation, Rome, Italy
| | - Sergio Bernardini
- Policlinico Tor Vergata Foundation, Rome, Italy; Department of Experimental Medicine and Surgery, University of Rome Tor Vergata, Rome, Italy
| | - Paolo Sbraccia
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy; Policlinico Tor Vergata Foundation, Rome, Italy
| | - Nicola Di Daniele
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy; Policlinico Tor Vergata Foundation, Rome, Italy
| | - Giuseppe Sconocchia
- Institute of Traslational Pharmacology, National Research Council, Rome, Italy
| | - Augusto Orlandi
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Andrea Urbani
- Department of Experimental Medicine and Surgery, University of Rome Tor Vergata, Rome, Italy; Laboratory of Proteomics and Metabonomics, S. Lucia Foundation-Istituto Di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy
| | - Davide Lauro
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy; Policlinico Tor Vergata Foundation, Rome, Italy;
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Tran HC, Marachelian A, Venkatramani R, Jubran RF, Mascarenhas L. Oxaliplatin and Doxorubicin for relapsed or refractory high-risk neuroblastoma. Pediatr Hematol Oncol 2015; 32:26-31. [PMID: 25551355 DOI: 10.3109/08880018.2014.983624] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Patients with relapsed or refractory neuroblastoma have poor long-term survival. New therapeutic regimens are needed. Doxorubicin and cisplatin are commonly used in the treatment of high-risk neuroblastoma. Oxaliplatin, a platinum compound with a 1,2-diaminocyclohexan carrier ligand, is more potent than cisplatin with less nephrotoxicity and ototoxicity. We treated seven relapsed/refractory neuroblastoma patients using oxaliplatin (105-130 mg/m(2)) and doxorubicin (60-75 mg/m(2)) together with dexrazoxane (10 mg/mg of doxorubicin) administered intravenously every three weeks. Prolonged thrombocytopenia causing treatment delay was observed when oxaliplatin was administered at 130 mg/m(2). A reduced dose of oxaliplatin 105 mg/m(2) on day 1 with doxorubicin at 20 mg/m(2)/dose on days 1-3 was well tolerated. Sensory neuropathies were mild and transient. No cardiotoxicity was noted despite all patients having a history of prior anthracycline exposure. Best responses included 1 complete response, 1 partial response, 1 mixed response, 3 stable diseases. In our cohort of heavily pretreated relapsed and refractory neuroblastoma patients, the combination of oxaliplatin and doxorubicin demonstrated anti-tumor activity and merits further investigation.
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Affiliation(s)
- Hung C Tran
- 2Division of Hematology/Oncology/BMT, Children's Hospital Los Angeles , Los Angeles, California , USA
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21
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Piras C, Soggiu A, Bonizzi L, Greco V, Ricchi M, Arrigoni N, Bassols A, Urbani A, Roncada P. Identification of immunoreactive proteins of Mycobacterium avium subsp. paratuberculosis. Proteomics 2015; 15:813-23. [PMID: 25404104 DOI: 10.1002/pmic.201400276] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 10/23/2014] [Accepted: 11/13/2014] [Indexed: 11/10/2022]
Abstract
Mycobacterium avium subsp. paratuberculosis (MAP) is the cause of a chronic enteritis of ruminants (bovine paratuberculosis (PTB)--Johne's disease) that is associated with enormous worldwide economic losses for the animal production. Diagnosis is based on observation of clinical signs, the detection of antibodies in milk or serum, or evaluation of bacterial culture from feces. The limit of these methods is that they are not able to detect the disease in the subclinical stage and are applicable only when the disease is already advanced. For this reason, the main purpose of this study is to use the MAP proteome to detect novel immunoreactive proteins that may be helpful for PTB diagnoses. 2DE and 2D immunoblotting of MAP proteins were performed using sera of control cattle and PTB-infected cattle in order to highlight the specific immunoreactive proteins. Among the assigned identifiers to immunoreactive spots it was found that most of them correspond to surface-located proteins while three of them have never been described before as antigens. The identification of these proteins improves scientific knowledge that could be useful for PTB diagnoses. The sequence of the identified protein can be used for the synthesis of immunoreactive peptides that could be screened for their immunoreaction against bovine sera infected with MAP. All MS data have been deposited in the ProteomeXchange consortium with identifier PXD001159 and DOI 10.6019/PXD001159.
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Chapman JD, Goodlett DR, Masselon CD. Multiplexed and data-independent tandem mass spectrometry for global proteome profiling. MASS SPECTROMETRY REVIEWS 2014; 33:452-70. [PMID: 24281846 DOI: 10.1002/mas.21400] [Citation(s) in RCA: 180] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Revised: 05/13/2013] [Accepted: 05/15/2013] [Indexed: 05/20/2023]
Abstract
One of the most important early developments in the field of proteomics was the advent of automated data acquisition routines that allowed high-throughput unattended data acquisition during HPLC introduction of peptide mixtures to a tandem mass spectrometer. Prior to this, data acquisition was orders of magnitude less efficient being based entirely on lists of predetermined ions generated in a prior HPLC-MS experiment. This process, known generically as data-dependent analysis, empowered the development of shotgun proteomics where hundreds to thousands of peptide sequences are matched per experiment. In their most popular implementation, the most abundant ionized species from every precursor ion scan at each moment in chromatographic time are successively selected for isolation, activation and tandem mass analysis. While extremely powerful, this strategy has one primary limitation in that detectable dynamic range is restricted (in a top-down manner) to the peptides that ionize the best. To circumvent the serial nature of the data-dependent process and increase detectable dynamic range, the concepts of multiplexed and data-independent acquisition (DIA) have emerged. Multiplexed-data acquisition is based on more efficient co-selection and co-dissociation of multiple precursor ions in parallel, the data from which is subsequently de-convoluted to provide polypeptide sequences for each individual precursor ion. DIA has similar goals, but there is no real-time ion selection based on prior precursor ion scans. Instead, predefined m/z ranges are interrogated either by fragmenting all ions entering the mass spectrometer at every single point in chromatographic time; or by dividing the m/z range into smaller m/z ranges for isolation and fragmentation. These approaches aim to fully utilize the capabilities of mass spectrometers to maximize tandem MS acquisition time and to address the need to expand the detectable dynamic range, lower the limit of detection, and improve the overall confidence of peptide identifications and relative protein quantification measurements. This review covers all aspects of multiplexed- and data-independent tandem mass spectrometry in proteomics, from experimental implementations to advances in software for data interpretation.
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Affiliation(s)
- John D Chapman
- Department of Medicinal Chemistry, University of Washington, Seattle, Washington, 98195-1700
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Saini RKR, Attarha S, da Silva Santos C, Kolakowska J, Funa K, Souchelnytskyi S. Proteomics of dedifferentiation of SK-N-BE2 neuroblastoma cells. Biochem Biophys Res Commun 2014; 454:202-9. [DOI: 10.1016/j.bbrc.2014.10.065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 10/14/2014] [Indexed: 12/21/2022]
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24
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Yerlikaya A, Okur E, Baykal AT, Acılan C, Boyacı I, Ulukaya E. A proteomic analysis of p53-independent induction of apoptosis by bortezomib in 4T1 breast cancer cell line. J Proteomics 2014; 113:315-25. [PMID: 25305590 DOI: 10.1016/j.jprot.2014.09.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 09/05/2014] [Accepted: 09/15/2014] [Indexed: 11/16/2022]
Abstract
UNLABELLED The 26S proteasome is a proteolytic enzyme found in both cytoplasm and nucleus. In this study, we examined the differential expression of proteasome inhibitor bortezomib-induced proteins in p53-deficient 4T1 cells. It was found that GRP78 and TCEB2 were over-expressed in response to treatment with bortezomib for 24h. Next, we analyzed the expression of intracellular proteins in response to treatment with 100nM bortezomib for 24h by label-free LC-MS/MS. These analyses showed that Hsp70, the 26S proteasome non-ATPase regulatory subunit 14 and sequestosome 1 were increased at least 2 fold in p53-deficient 4T1 cells. The proteins identified by label-free LC-MS/MS were then analyzed by Ingenuity Pathway Analysis (IPA) Tool to determine biological networks affected by inhibition of the 26S proteasome. The analysis results showed that post-translational modifications, protein folding, DNA replication, energy production and nucleic acid metabolism were found to be among the top functions affected by the 26S proteasome inhibition. The biological network analysis indicated that ubiquitin may be the central regulator of the pathways modulated after bortezomib-treatment. Further investigation of the mechanism of the proteins modulated in response to the proteasomal inhibition may lead to the design of more effective and novel therapeutic strategies for cancer. BIOLOGICAL SIGNIFICANCE Although the proteasome inhibitor bortezomib is approved and used for the treatment of human cancer (multiple myeloma), the mechanism of action is not entirely understood. A number of studies showed that proteasome inhibitors induced apoptosis through upregulation of tumor suppressor protein p53. However, the role of tumor suppressor protein p53 in bortezomib-induced apoptosis is controversial and not well-understood. The tumor suppressor p53 is mutated in at least 50% of human cancers and is strongly induced by proteasomal inhibition. Some also reported that the proteasome inhibitor can induce apoptosis in a p53-independent manner. Also, it is reported that Noxa, a target of p53, is induced in response to proteasomal inhibition in a p53-independent manner. However, we have also previously reported that neither Puma nor Noxa are induced by proteasomal inhibition in p53-null 4T1 breast cancer cells, which is commonly used for in vivo breast cancer tumor models. The current results provided additional targets of proteasome inhibitor bortezomib and may therefore help in understanding the p53-independent mechanism of apoptosis induction by proteasome inhibitors. In addition, the results presented in this current study report for the first time that proteasomal subunit Psmd14, anti-apoptotic GRP78, anti apoptotic protein Card10, Dffb, Traf3 and Trp53bp2 are regulated and overexpressed in response to proteasome inhibitor bortezomib in p53-deficient 4T1 cells. Therefore, novel therapeutic strategies targeting these anti-apoptotic or pro-apoptotic proteins as well as inhibiting the proteasome simultaneously may be more effective against cancer cells. The proteins identified here present new avenues for the development of anti-cancer drugs.
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Affiliation(s)
- Azmi Yerlikaya
- Dumlupınar University, Faculty of Medicine, Department of Medical Biology, Kütahya, Turkey.
| | - Emrah Okur
- Dumlupınar University, Art and Science Faculty, Department of Biology, Kütahya, Turkey
| | - Ahmet Tarık Baykal
- İstanbul Medipol University, Medical School, Department of Medical Biochemistry, İstanbul, Turkey
| | - Ceyda Acılan
- TÜBİTAK, MAM, Genetic Engineering and Biotechnology Department, Gebze, Kocaeli, Turkey
| | - Ihsan Boyacı
- İstanbul Medipol University, Vatan Clinic, İstanbul, 34214, Turkey
| | - Engin Ulukaya
- Department of Medical Biochemistry, Uludağ University, Bursa, Turkey
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25
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UPLC–MSE application in disease biomarker discovery: The discoveries in proteomics to metabolomics. Chem Biol Interact 2014; 215:7-16. [DOI: 10.1016/j.cbi.2014.02.014] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Revised: 02/14/2014] [Accepted: 02/28/2014] [Indexed: 01/05/2023]
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26
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D'Aguanno S, Barcaroli D, Rossi C, Zucchelli M, Ciavardelli D, Cortese C, De Cola A, Volpe S, D'Agostino D, Todaro M, Stassi G, Di Ilio C, Urbani A, De Laurenzi V. p63 isoforms regulate metabolism of cancer stem cells. J Proteome Res 2014; 13:2120-36. [PMID: 24597989 DOI: 10.1021/pr4012574] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
p63 is an important regulator of epithelial development expressed in different variants containing (TA) or lacking (ΔN) the N-terminal transactivation domain. The different isoforms regulate stem-cell renewal and differentiation as well as cell senescence. Several studies indicate that p63 isoforms also play a role in cancer development; however, very little is known about the role played by p63 in regulating the cancer stem phenotype. Here we investigate the cellular signals regulated by TAp63 and ΔNp63 in a model of epithelial cancer stem cells. To this end, we used colon cancer stem cells, overexpressing either TAp63 or ΔNp63 isoforms, to carry out a proteomic study by chemical-labeling approach coupled to network analysis. Our results indicate that p63 is implicated in a wide range of biological processes, including metabolism. This was further investigated by a targeted strategy at both protein and metabolite levels. The overall data show that TAp63 overexpressing cells are more glycolytic-active than ΔNp63 cells, indicating that the two isoforms may regulate the key steps of glycolysis in an opposite manner. The mass-spectrometry proteomics data of the study have been deposited to the ProteomeXchange Consortium ( http://proteomecentral.proteomexchange.org ) via the PRIDE partner repository with data set identifiers PXD000769 and PXD000768.
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Affiliation(s)
- Simona D'Aguanno
- Department of Experimental and Clinical Sciences, "G. d'Annunzio University" , Via dei Vestini 31, Chieti-Pescara 66100, Italy
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27
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Størvold GL, Landskron J, Strozynski M, Arntzen MØ, Koehler CJ, Kalland ME, Taskén K, Thiede B. Quantitative profiling of tyrosine phosphorylation revealed changes in the activity of the T cell receptor signaling pathway upon cisplatin-induced apoptosis. J Proteomics 2013; 91:344-57. [DOI: 10.1016/j.jprot.2013.07.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 07/08/2013] [Accepted: 07/22/2013] [Indexed: 12/18/2022]
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28
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Kaga E, Karademir B, Baykal AT, Ozer NK. Identification of differentially expressed proteins in atherosclerotic aorta and effect of vitamin E. J Proteomics 2013; 92:260-73. [DOI: 10.1016/j.jprot.2013.06.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 06/06/2013] [Accepted: 06/09/2013] [Indexed: 10/26/2022]
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29
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Paulitschke V, Haudek-Prinz V, Griss J, Berger W, Mohr T, Pehamberger H, Kunstfeld R, Gerner C. Functional classification of cellular proteome profiles support the identification of drug resistance signatures in melanoma cells. J Proteome Res 2013; 12:3264-76. [PMID: 23713901 PMCID: PMC3733130 DOI: 10.1021/pr400124w] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
![]()
Drug
resistance is a major obstacle in melanoma treatment. Recognition
of specific resistance patterns, the understanding of the patho-physiology
of drug resistance, and identification of remaining options for individual
melanoma treatment would greatly improve therapeutic success. We performed
mass spectrometry-based proteome profiling of A375 melanoma cells
and HeLa cells characterized as sensitive to cisplatin in comparison
to cisplatin resistant M24met and TMFI melanoma cells. Cells were
fractionated into cytoplasm, nuclei and secretome and the proteome
profiles classified according to Gene Ontology. The cisplatin resistant
cells displayed increased expression of lysosomal as well as Ca2+ ion binding and cell adherence proteins. These findings
were confirmed using Lysotracker Red staining and cell adhesion assays
with a panel of extracellular matrix proteins. To discriminate specific
survival proteins, we selected constitutively expressed proteins of
resistant M24met cells which were found expressed upon challenging
the sensitive A375 cells. Using the CPL/MUW proteome database, the
selected lysosomal, cell adherence and survival proteins apparently
specifying resistant cells were narrowed down to 47 proteins representing
a potential resistance signature. These were tested against our proteomics
database comprising more than 200 different cell types/cell states
for its predictive power. We provide evidence that this signature
enables the automated assignment of resistance features as readout
from proteome profiles of any human cell type. Proteome profiling
and bioinformatic processing may thus support the understanding of
drug resistance mechanism, eventually guiding patient tailored therapy.
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Affiliation(s)
- Verena Paulitschke
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
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30
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Pieragostino D, Agnifili L, Fasanella V, D'Aguanno S, Mastropasqua R, Di Ilio C, Sacchetta P, Urbani A, Del Boccio P. Shotgun proteomics reveals specific modulated protein patterns in tears of patients with primary open angle glaucoma naïve to therapy. MOLECULAR BIOSYSTEMS 2013; 9:1108-16. [PMID: 23580065 DOI: 10.1039/c3mb25463a] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Primary open angle glaucoma (POAG) is one of the main causes of irreversible blindness worldwide. The pathogenesis of POAG is still unclear. Alteration and sclerosis of trabecular meshwork with changes in aqueous humor molecular composition seem to play the key role. Increased intraocular pressure is widely known to be the main risk factor for the onset and progression of the disease. Unfortunately, the early diagnosis of POAG still remains the main challenge. In order to provide insight into the patho-physiology of glaucoma, here we report a shotgun proteomics approach to tears of patients with POAG naïve to therapy. Our proteomics results showed 27 differential tear proteins in POAG vs. CTRL comparison (25 up regulated proteins in the POAG group and two unique proteins in the CTRL group), 16 of which were associated with inflammatory response, free radical scavenging, cell-to-cell signaling and interaction. Overall the protein modulation shown in POAG tears proves the involvement of biochemical networks linked to inflammation. Among all regulated proteins, a sub-group of 12 up-regulated proteins in naïve POAG patients were found to be down-regulated in medically controlled POAG patients treated with prostanoid analogues (PGA), as reported in our previous work (i.e., lipocalin-1, lysozyme C, lactotransferrin, proline-rich-protein 4, prolactin-inducible protein, zinc-alpha-2-glycoprotein, polymeric immunoglobulin receptor, cystatin S, Ig kappa chain C region, Ig alpha-2 chain C region, immunoglobulin J chain, Ig alpha-1 chain C region). In summary, our findings indicate that the POAG tears protein expression is a mixture of increased inflammatory proteins that could be potential biomarkers of the disease, and their regulation may be involved in the mechanism by which PGA are able to decrease the intraocular pressure in glaucoma patients.
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Affiliation(s)
- Damiana Pieragostino
- Department of Experimental and Clinical Sciences, University G. d'Annunzio of Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy.
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31
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Solarska-Ściuk K, Gajewska A, Skolimowski J, Mitura K, Bartosz G. Stimulation of production of reactive oxygen and nitrogen species in endothelial cells by unmodified and Fenton-modified ultradisperse detonation diamond. Biotechnol Appl Biochem 2013; 60:259-65. [PMID: 23586587 DOI: 10.1002/bab.1071] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Accepted: 11/26/2012] [Indexed: 11/10/2022]
Abstract
In recent years, the development of nanotechnology opens up new prospects for biomedical applications of unmodified and chemically modified diamond nanoparticles (DNPs). The problem of biocompatibility of DNPs is thus of primary importance. The first step in the modification of DNPs is usually the introduction of -OH groups, which can bind other functional groups. One of the basic methods to introduce -OH groups onto DNPs is the Fenton reaction. The aim of this study was to compare the effect of unmodified DNPs and nanoparticles modified by the Fenton reaction on human endothelial cells. Ultradisperse diamond (UDD) was modified by the Fenton reaction introducing surface -OH groups. Immortalized human umbilical cord endothelial cells (HUVEC-ST) were incubated with 2-100 µg/mL nanopowders in the opti-MEM medium. For comparison, graphite powder (GRAF and GRAF+OH) was also employed. UDD and GRAF augmented generation of reactive oxygen species in the cells after 24 H incubation, estimated by oxidation of 2',7'-dichlorofluorescin diacetate (H2DCF-DA). Cellular production of nitric oxide, estimated with DAF-FM-DA (3-amino-4-aminomethyl 2',7'-dichlorofluorescein diacetate), was also affected by UDD and GRAF after 24 H. Fenton-modified OH, in contrast to unmodified diamond, decreased NO production. Detonation nanoparticles also affected the cellular content of glutathione and activities of main antioxidant enzymes (superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase, and glutathione S-transferase). This article was published online on 5 February 2013. Errors in the byline and affiliation line were subsequently identified. This notice is included in the online and print versions to indicate that both have been corrected 18 April 2013.
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Affiliation(s)
- K Solarska-Ściuk
- Department of Molecular Biophysics, University of Lodz, Lodz, Poland.
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32
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Kopecky BJ, Decook R, Fritzsch B. N-Myc and L-Myc are essential for hair cell formation but not maintenance. Brain Res 2012; 1484:1-14. [PMID: 23022312 DOI: 10.1016/j.brainres.2012.09.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 08/31/2012] [Accepted: 09/13/2012] [Indexed: 01/01/2023]
Abstract
Sensorineural hearing loss results from damage to the hair cells of the organ of Corti and is irreversible in mammals. While hair cell regeneration may prove to be the ideal therapy after hearing loss, prevention of initial hair cell loss could provide even more benefit at a lower cost. Previous studies have shown that the deletion of Atoh1 results in embryonic loss of hair cells while the absence of Barhl1, Gfi1, and Pou4f3 leads to the progressive loss of hair cells in newborn mice. We recently reported that in the early embryonic absence of N-Myc (using Pax2-Cre), hair cells in the organ of Corti develop and remain until at least seven days after birth, with subsequent progressive loss. Thus, N-Myc plays a role in hair cell viability; however, it is unclear if this is due to its early expression in hair cell precursors and throughout the growing otocyst as it functions through proliferation or its late expression exclusively in differentiated hair cells. Furthermore, the related family member L-Myc is mostly co-expressed in the ear, including in differentiated hair cells, but its function has not been studied and could be partially redundant to N-Myc. To test for a long-term function of the Mycs in differentiated hair cells, we generated nine unique genotypes knocking out N-Myc and/or L-Myc after initial formation of hair cells using the well-characterized Atoh1-Cre. We tested functionality of the auditory and vestibular systems at both P21 and four months of age and under the administration of the ototoxic drug cisplatin. We conclude that neither N-Myc nor L-Myc is likely to play important roles in long-term hair cell maintenance. Therefore, it is likely that the late-onset loss of hair cells resulting from early deletion of the Mycs leads to an unsustainable developmental defect.
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33
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Zhang G, Sun L, Lu X, Chen Z, Duerksen-Hughes PJ, Hu H, Zhu X, Yang J. Cisplatin treatment leads to changes in nuclear protein and microRNA expression. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2012; 746:66-77. [DOI: 10.1016/j.mrgentox.2012.03.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 02/17/2012] [Accepted: 03/20/2012] [Indexed: 02/03/2023]
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34
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Application of proteomics to soft tissue sarcomas. INTERNATIONAL JOURNAL OF PROTEOMICS 2012; 2012:876401. [PMID: 22778956 PMCID: PMC3388341 DOI: 10.1155/2012/876401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Accepted: 04/21/2012] [Indexed: 01/27/2023]
Abstract
Soft tissue sarcomas are rare and account for less than 1% of all malignant cancers. Other than development of intensive therapies, the clinical outcome of patients with soft tissue sarcoma remains very poor, particularly when diagnosed at a late stage. Unique mutations have been associated with certain soft tissue sarcomas, but their etiologies remain unknown. The proteome is a functional translation of a genome, which directly regulates the malignant features of tumors. Thus, proteomics is a promising approach for investigating soft tissue sarcomas. Various proteomic approaches and clinical materials have been used to address clinical and biological issues, including biomarker development, molecular target identification, and study of disease mechanisms. Several cancer-associated proteins have been identified using conventional technologies such as 2D-PAGE, mass spectrometry, and array technology. The functional backgrounds of proteins identified were assessed extensively using in vitro experiments, thus supporting expression analysis. These observations demonstrate the applicability of proteomics to soft tissue sarcoma studies. However, the sample size in each study was insufficient to allow conclusive results. Given the low frequency of soft tissue sarcomas, multi-institutional collaborations are required to validate the results of proteomic approaches.
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35
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Haçarız O, Sayers G, Baykal AT. A Proteomic Approach To Investigate the Distribution and Abundance of Surface and Internal Fasciola hepatica Proteins during the Chronic Stage of Natural Liver Fluke Infection in Cattle. J Proteome Res 2012; 11:3592-604. [DOI: 10.1021/pr300015p] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Orçun Haçarız
- TÜBİTAK
Marmara
Research Center, Genetic Engineering and Biotechnology Institute, P.O. Box 21, 41470, Gebze, Kocaeli, Turkey
| | - Gearóid Sayers
- Veterinary Sciences Centre,
School of Agriculture, Food Science and Veterinary Medicine, College
of Life Sciences, University College Dublin, Belfield, Dublin 4, Ireland
| | - Ahmet Tarık Baykal
- TÜBİTAK
Marmara
Research Center, Genetic Engineering and Biotechnology Institute, P.O. Box 21, 41470, Gebze, Kocaeli, Turkey
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36
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Creskey MC, Li C, Wang J, Girard M, Lorbetskie B, Gravel C, Farnsworth A, Li X, Smith DGS, Cyr TD. Simultaneous quantification of the viral antigens hemagglutinin and neuraminidase in influenza vaccines by LC-MSE. Vaccine 2012; 30:4762-70. [PMID: 22643214 DOI: 10.1016/j.vaccine.2012.05.036] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Revised: 05/14/2012] [Accepted: 05/16/2012] [Indexed: 11/17/2022]
Abstract
Current methods for quality control of inactivated influenza vaccines prior to regulatory approval include determining the hemagglutinin (HA) content by single radial immunodiffusion (SRID), verifying neuraminidase (NA) enzymatic activity, and demonstrating that the levels of the contaminant protein ovalbumin are below a set threshold of 1 μg/dose. The SRID assays require the availability of strain-specific reference HA antigens and antibodies, the production of which is a potential rate-limiting step in vaccine development and release, particularly during a pandemic. Immune responses induced by neuraminidase also contribute to protection from infection; however, the amounts of NA antigen in influenza vaccines are currently not quantified or standardized. Here, we report a method for vaccine analysis that yields simultaneous quantification of HA and NA levels much more rapidly than conventional HA quantification techniques, while providing additional valuable information on the total protein content. Enzymatically digested vaccine proteins were analyzed by LC-MS(E), a mass spectrometric technology that allows absolute quantification of analytes, including the HA and NA antigens, other structural influenza proteins and chicken egg proteins associated with the manufacturing process. This method has potential application for increasing the accuracy of reference antigen standards and for validating label claims for HA content in formulated vaccines. It can also be used to monitor NA and chicken egg protein content in order to monitor manufacturing consistency. While this is a useful methodology with potential for broad application, we also discuss herein some of the inherent limitations of this approach and the care and caution that must be taken in its use as a tool for absolute protein quantification. The variations in HA, NA and chicken egg protein concentrations in the vaccines analyzed in this study are indicative of the challenges associated with the current manufacturing and quality control testing procedures.
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Affiliation(s)
- Marybeth C Creskey
- Centre for Vaccine Evaluation, Health Canada, 251 Sir Frederick Banting Driveway, Locator 2201E, Tunney's Pasture, Ottawa, ON K1A 0L2, Canada
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37
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Marzano V, Santini S, Rossi C, Zucchelli M, D'Alessandro A, Marchetti C, Mingardi M, Stagni V, Barilà D, Urbani A. Proteomic profiling of ATM kinase proficient and deficient cell lines upon blockage of proteasome activity. J Proteomics 2012; 75:4632-46. [PMID: 22641158 PMCID: PMC3426930 DOI: 10.1016/j.jprot.2012.05.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Revised: 04/27/2012] [Accepted: 05/16/2012] [Indexed: 11/24/2022]
Abstract
Ataxia Telangiectasia Mutated (ATM) protein kinase is a key effector in the modulation of the functionality of some important stress responses, including DNA damage and oxidative stress response, and its deficiency is the hallmark of Ataxia Telangiectasia (A-T), a rare genetic disorder. ATM modulates the activity of hundreds of target proteins, essential for the correct balance between proliferation and cell death. The aim of this study is to evaluate the phenotypic adaptation at the protein level both in basal condition and in presence of proteasome blockage in order to identify the molecules whose level and stability are modulated through ATM expression. We pursued a comparative analysis of ATM deficient and proficient lymphoblastoid cells by label-free shotgun proteomic experiments comparing the panel of proteins differentially expressed. Through a non-supervised comparative bioinformatic analysis these data provided an insight on the functional role of ATM deficiency in cellular carbohydrate metabolism's regulation. This hypothesis has been demonstrated by targeted metabolic fingerprint analysis SRM (Selected Reaction Monitoring) on specific thermodynamic checkpoints of glycolysis. This article is part of a Special Issue entitled: Translational Proteomics.
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Affiliation(s)
- Valeria Marzano
- Proteomic and Metabonomic Laboratory, Fondazione Santa Lucia, 00143 Rome, Italy
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38
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D'Aguanno S, D'Agnano I, De Canio M, Rossi C, Bernardini S, Federici G, Urbani A. Shotgun proteomics and network analysis of neuroblastoma cell lines treated with curcumin. MOLECULAR BIOSYSTEMS 2012; 8:1068-77. [DOI: 10.1039/c2mb05498a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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39
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Sau A, Filomeni G, Pezzola S, D'Aguanno S, Tregno FP, Urbani A, Serra M, Pasello M, Picci P, Federici G, Caccuri AM. Targeting GSTP1-1 induces JNK activation and leads to apoptosis in cisplatin-sensitive and -resistant human osteosarcoma cell lines. ACTA ACUST UNITED AC 2012; 8:994-1006. [DOI: 10.1039/c1mb05295k] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Pieragostino D, Bucci S, Agnifili L, Fasanella V, D'Aguanno S, Mastropasqua A, Ciancaglini M, Mastropasqua L, Ilio CD, Sacchetta P, Urbani A, Boccio PD. Differential protein expression in tears of patients with primary open angle and pseudoexfoliative glaucoma. ACTA ACUST UNITED AC 2012; 8:1017-28. [DOI: 10.1039/c1mb05357d] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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41
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D'Alessandro A, D'Aguanno S, Cencioni MT, Pieroni L, Diamantini A, Battistini L, Longone P, Spalloni A, De Laurenzi V, Bernardini S, Federici G, Urbani A. Protein repertoire impact of Ubiquitin-Proteasome System impairment: insight into the protective role of beta-estradiol. J Proteomics 2011; 75:1440-53. [PMID: 22146475 DOI: 10.1016/j.jprot.2011.11.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Revised: 10/18/2011] [Accepted: 11/14/2011] [Indexed: 01/01/2023]
Abstract
The Ubiquitin-Proteasome System (UPS) and the Autophagy-Lysosome Pathways (ALP) are key mechanisms for cellular homeostasis sustenance and protein clearance. A wide number of Neurodegenerative Diseases (NDs) are tied with UPS impairment and have been also described as proteinopathies caused by aggregate-prone proteins, not efficiently removed by proteasome. Despite the large knowledge on proteasome biological role, molecular mechanisms associated with its impairment are still blur. We have pursued a comprehensive proteomic investigation to evaluate the phenotypic rearrangements in protein repertoires associated with a UPS blockage. Different functional proteomic approaches have been employed to tackle UPS impairment impact on human NeuroBlastoma (NB) cell lines responsive to proteasome inhibition by Epoxomicin. 2-Dimensional Electrophoresis (2-DE) separation combined with Mass Spectrometry and Shotgun Proteomics experiments have been employed to design a thorough picture of protein profile. Unsupervised meta-analysis of the collected proteomic data revealed that all the identified proteins relate each other in a functional network centered on beta-estradiol. Moreover we showed that treatment of cells with beta-estradiol resulted in aggregate removal and increased cell survival due to activation of the autophagic pathway. Our data may provide the molecular basis for the use of beta-estradiol in neurodegenerative disorders by induction of protein aggregate removal.
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Affiliation(s)
- Annamaria D'Alessandro
- Department of Internal Medicine, University of Rome Tor Vergata, Faculty of Medicine and Surgery, Via Montpellier, 1, 00133-Rome, Italy
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42
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Backos DS, Franklin CC, Reigan P. The role of glutathione in brain tumor drug resistance. Biochem Pharmacol 2011; 83:1005-12. [PMID: 22138445 DOI: 10.1016/j.bcp.2011.11.016] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Revised: 11/18/2011] [Accepted: 11/18/2011] [Indexed: 12/24/2022]
Abstract
Chemotherapy is central to the current treatment modality for primary human brain tumors, but despite high-dose and intensive treatment regimens there has been little improvement in patient outcome. The development of tumor chemoresistance has been proposed as a major contributor to this lack of response. While there have been some improvements in our understanding of the molecular mechanisms underlying brain tumor drug resistance over the past decade, the contribution of glutathione (GSH) and the GSH-related enzymes to drug resistance in brain tumors have been largely overlooked. GSH constitutes a major antioxidant defense system in the brain and together with the GSH-related enzymes plays an important role in protecting cells against free radical damage and dictating tumor cell response to adjuvant cancer therapies, including irradiation and chemotherapy. Glutamate cysteine ligase (GCL), glutathione synthetase (GS), glutathione peroxidase (GPx), glutathione reductase (GR), glutathione-S-transferases (GST), and GSH complex export transporters (GS-X pumps) are major components of the GSH-dependent enzyme system that function in a dynamic cascade to maintain redox homeostasis. In many tumors, the GSH system is often dysregulated, resulting in a more drug resistant phenotype. This is commonly associated with GST-mediated GSH conjugation of various anticancer agents leading to the formation of less toxic GSH-drug complexes, which can be readily exported from the cell. Advances in our understanding of the mechanisms of drug resistance and patient selection based on biomarker profiles will be crucial to adapt therapeutic strategies and improve outcomes for patients with primary malignant brain tumors.
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Affiliation(s)
- Donald S Backos
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Denver, Aurora, 80045, United States
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Calabrese C, Marzano V, Urbani A, Lazzarini G, Valerii MC, Liguori G, Di Molfetta S, Rizzello F, Gionchetti P, Campieri M, Spisni E. Distinct proteomic profiles characterise non-erosive from erosive reflux disease. Aliment Pharmacol Ther 2011; 34:982-93. [PMID: 21848794 DOI: 10.1111/j.1365-2036.2011.04801.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
BACKGROUND Erosive reflux disease (ERD) and non-erosive reflux disease (NERD) are often regarded as part of the spectrum of the same disease. AIM To elucidate molecular features that characterise NERD and ERD at the protein level. METHODS A total of 56 consecutive subjects were enrolled: 10 healthy subjects, 24 with NERD and 22 with ERD. Eight specimens were taken from macroscopically normal mucosa at 5 cm of gastro-oesophageal junction. Four were processed for the proteins extraction and four for evaluation using haematoxylin-eosin and immunohistochemistry. We used shotgun proteomics to identify tentative disease molecular features for ERD or NERD. Candidate distinctive proteins were verified using immunohistochemistry. RESULTS Shotgun proteomics analysis revealed 33 differentially expressed proteins in NERD vs. ERD samples, involved in cellular proliferation, keratinisation, stress responses and sugar metabolism. Based on a gene ontology meta-analysis, seven of them were further analysed using Western blotting (WB) and four also using immunohistochemistry. We identified novel candidate disease molecular features for GERD and few distinctive proteins to discriminate NERD and ERD. In particular, Transitional Endoplasmic Reticulum ATPase (TER ATPase), GAPDH, Alpha 1 Acid Glycoprotein 1, Annexin A1, Calmodulin and 14-3-3 proteins were confirmed at WB analysis. CONCLUSIONS Non-erosive reflux disease and ERD are distinct disease entities at the protein level. This study proposes an array of candidate biomarkers possibly useful to discriminate between NERD and ERD.
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Affiliation(s)
- C Calabrese
- Department of Clinical Medicine, University of Bologna, Bologna, Italy.
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Banci L, Bertini I, Ciofi-Baffoni S, D'Alessandro A, Jaiswal D, Marzano V, Neri S, Ronci M, Urbani A. Copper exposure effects on yeast mitochondrial proteome. J Proteomics 2011; 74:2522-35. [DOI: 10.1016/j.jprot.2011.04.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2011] [Revised: 03/27/2011] [Accepted: 04/13/2011] [Indexed: 11/28/2022]
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Degeneration and regeneration of the nerves of the heart after transplantation. Transplantation 1973; 5:e1336. [PMID: 25032859 PMCID: PMC4123079 DOI: 10.1038/cddis.2014.285] [Citation(s) in RCA: 192] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 05/21/2014] [Accepted: 05/27/2014] [Indexed: 12/11/2022]
Abstract
A number of studies suggest that cancer stem cells are essential for tumour growth, and failure to target these cells can result in tumour relapse. As this population of cells has been shown to be resistant to radiation and chemotherapy, it is essential to understand their biology and identify new therapeutic approaches. Targeting cancer metabolism is a potential alternative strategy to counteract tumour growth and recurrence. Here we applied a proteomic and targeted metabolomic analysis in order to point out the main metabolic differences between breast cancer cells grown as spheres and thus enriched in cancer stem cells were compared with the same cells grown in adherent differentiating conditions. This integrated approach allowed us to identify a metabolic phenotype associated with the stem-like condition and shows that breast cancer stem cells (BCSCs) shift from mitochondrial oxidative phosphorylation towards fermentative glycolysis. Functional validation of proteomic and metabolic data provide evidences for increased activities of key enzymes of anaerobic glucose fate such as pyruvate kinase M2 isoform, lactate dehydrogenase and glucose 6-phopshate dehydrogenase in cancer stem cells as well as different redox status. Moreover, we show that treatment with 2-deoxyglucose, a well known inhibitor of glycolysis, inhibits BCSC proliferation when used alone and shows a synergic effect when used in combination with doxorubicin. In conclusion, we suggest that inhibition of glycolysis may be a potentially effective strategy to target BCSCs.
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