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Abstract
The skeletal muscle proteome consists of a large number of diverse protein species with a broad and dynamic concentration range. Since mature skeletal muscles are characterized by a distinctive combination of contractile cells with differing physiological and biochemical properties, it is essential to determine specific differences in the protein composition of fast, slow, and hybrid fibers. Fluorescence two-dimensional difference gel electrophoresis (2D-DIGE) is a powerful comparative tool to analyze fiber type-specific differences between predominantly fast contracting versus slower twitching muscles. In this chapter, the application of the 2D-DIGE method for the comparative analysis of different subtypes of skeletal muscles is outlined in detail. A standardized proteomic workflow is described, involving sample preparation, protein extraction, differential fluorescence labeling using a 3-CyDye system, first-dimension isoelectric focusing, second-dimension slab gel electrophoresis, 2D-DIGE image analysis, protein digestion, and mass spectrometry.
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Affiliation(s)
- Kay Ohlendieck
- Department of Biology, Maynooth University, National University of Ireland, Maynooth, Co. Kildare, Ireland.
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Tong T, Zhang J, Jia L, Liang P, Wang N. Integrated proteomics and metabolomics analysis reveals hubs protein and network alterations in myasthenia gravis. Aging (Albany NY) 2022; 14:5417-5426. [PMID: 35802752 PMCID: PMC9320536 DOI: 10.18632/aging.204156] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 06/16/2022] [Indexed: 12/03/2022]
Abstract
Background: Thymoma-associated myasthenia gravis (TAMG) is a well-described subtype of Myasthenia gravis (MG). Nevertheless, the detailed proteins and bioprocess differentiating TAMG from TAMG (−) thymoma have remained unclear. Methods: The proteomics and metabolomics were carried out on serum samples from thymoma group (n = 60, TNMG), TAMG (+) thymoma group (n = 70, TAMG (+)), and TAMG (−) thymomas group (n = 62, TAMG (−)), and controls (n = 159). groups. Proteomics and metabolomics analyses, including weighted gene co-expression network analysis (WGCNA), was conducted to detect the hub proteins and metabolomics processes that could differentiate TAMG (+) from TAMG (−) thymomas. MetaboAnalyst was used to examine the integration of proteomic and metabolomic analysis to differentiate TAMG (+) from TAMG (−) thymomas. Results: The of module–trait correlation of WGCNA analysis identified KRT1, GSN, COL6A1, KRT10, FOLR2, KRT9, KRT2, TPI1, ARF3, LYZ, ADIPOQ, SEMA4B, IGKV1-27, MASP2, IGF2R was associated with TAMG (+) thymomas. In addition, organismal systems-immune system and metabolism-biosynthesis of other secondary metabolites were closely related to the mechanism of TAMG (+) pathogenesis. Conclusion: Our integrated proteomics and metabolomics analysis supply a systems-level view of proteome changes in TAMG (+), TAMG (−) thymomas and exposes disease-associated protein network alterations involved in.
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Affiliation(s)
- Tong Tong
- Department of Anesthesiology, The Fourth Affiliated Hospital of Hebei Medical University, Shijiazhuang 050011, China
| | - Jing Zhang
- Department of Anesthesiology, The Fourth Affiliated Hospital of Hebei Medical University, Shijiazhuang 050011, China
| | - Li Jia
- Department of Anesthesiology, The Fourth Affiliated Hospital of Hebei Medical University, Shijiazhuang 050011, China
| | - Ping Liang
- Department of Pharmacy, The Fourth Affiliated Hospital of Hebei Medical University, Shijiazhuang 050011, China
| | - Na Wang
- Department of Gynaecology, The Fourth Affiliated Hospital of Hebei Medical University, Shijiazhuang 050011, China
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Lepedda AJ, Deiana GA, Lobina O, Nieddu G, Baldinu P, De Muro P, Andreetta F, Sechi E, Arru G, Corda DG, Sechi GP, Formato M. Plasma vitronectin is reduced in patients with myasthenia gravis: Diagnostic and pathophysiological potential. J Circ Biomark 2019; 8:1849454419875912. [PMID: 31588250 PMCID: PMC6740073 DOI: 10.1177/1849454419875912] [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: 02/19/2019] [Accepted: 08/18/2019] [Indexed: 01/03/2023] Open
Abstract
Myasthenia gravis (MG) is an autoimmune disease leading to varying degrees of skeletal muscle weakness. It is caused by specific antibodies directed against definite components in the postsynaptic membrane at the neuromuscular junction (NMJ), such as the acetylcholine receptor (AChR) and the muscle-specific kinase (MUSK) receptor. In clinical practice, MG patients may be classified into three main subgroups based on the occurrence of serum autoantibodies directed against AChR or MUSK receptor or antibody-negative. As the MG subgroups differ in terms of clinical characteristics, disease pathogenesis, prognosis, and response to therapies, they could benefit from targeted treatment as well as the detection of other possible disease biomarkers. We performed proteomics on plasma fractions enriched in low-abundance proteins to identify potential biomarkers according to different autoimmune responses. By this approach, we evidenced a significant reduction of vitronectin in MG patients compared to healthy controls, irrespective of the autoantibodies NMJ target. The obtained results were validated by mono- and two-dimensional Western blotting analysis. Vitronectin is a multifunctional glycoprotein involved in the regulation of several pathophysiological processes, including complement-dependent immune response, coagulation, fibrinolysis, pericellular proteolysis, cell attachment, and spreading. The pathophysiological significance of the reduction of plasma vitronectin in MG patients has yet to be fully elucidated. It could be related either to a possible deposition of vitronectin at NMJ to counteract the complement-mediated muscle damage at this level or to a parallel variation of this glycoprotein in the muscle extracellular matrix with secondary induced alteration in clustering of AChRs at NMJ, as it occurs with variation in concentrations of agrin, another extracellular matrix component. The clinical value of measuring plasma vitronectin has yet to be defined. According to present findings, significantly lower plasma values of this glycoprotein might be indicative of an impaired complement-dependent immune response.
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Affiliation(s)
- Antonio Junior Lepedda
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Giovanni Andrea Deiana
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Omar Lobina
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Gabriele Nieddu
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Paola Baldinu
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Pierina De Muro
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Francesca Andreetta
- Diagnostic Laboratory of Neuroimmunolgy, U.O. Neurologia IV, I.R.C.C.S. Fondazione Istituto Neurologico "C. Besta", Milano, Italy
| | - Elia Sechi
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Giannina Arru
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Davide Giacomo Corda
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Gian Pietro Sechi
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
| | - Marilena Formato
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro, Sassari, Italy
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Abstract
The skeletal muscle proteome consists of a large number of diverse protein species with a broad and dynamic concentration range. Since mature skeletal muscles are characterized by a specific combination of contractile cells with differing physiological and biochemical properties, it is essential to determine specific differences in the protein composition of fast, slow, and hybrid fibers. Fluorescence two-dimensional gel electrophoresis (DIGE) is a powerful comparative tool to analyze fiber type-specific differences between fast and slow muscles. In this chapter, the application of the DIGE method for the comparative analysis of different subtypes of skeletal muscles is outlined in detail. A standardized proteomic workflow is described, involving sample preparation, protein extraction, differential fluorescence labeling using a 3-dye system, first-dimension isoelectric focusing, second-dimension slab gel electrophoresis, DIGE image analysis, protein digestion, and mass spectrometry.
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Affiliation(s)
- Kay Ohlendieck
- Department of Biology, Maynooth University, National University of Ireland, Maynooth, Co. Kildare, Ireland.
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Lazaridis K, Baltatzidi V, Trakas N, Koutroumpi E, Karandreas N, Tzartos SJ. Characterization of a reproducible rat EAMG model induced with various human acetylcholine receptor domains. J Neuroimmunol 2017; 303:13-21. [DOI: 10.1016/j.jneuroim.2016.12.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 12/04/2016] [Accepted: 12/05/2016] [Indexed: 01/08/2023]
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Dowling P, Murphy S, Ohlendieck K. Proteomic profiling of muscle fibre type shifting in neuromuscular diseases. Expert Rev Proteomics 2016; 13:783-99. [DOI: 10.1080/14789450.2016.1209416] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Brinkmeier H, Ohlendieck K. Chaperoning heat shock proteins: Proteomic analysis and relevance for normal and dystrophin-deficient muscle. Proteomics Clin Appl 2014; 8:875-95. [DOI: 10.1002/prca.201400015] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 04/24/2014] [Accepted: 05/28/2014] [Indexed: 12/15/2022]
Affiliation(s)
| | - Kay Ohlendieck
- Department of Biology; National University of Ireland; Maynooth Co. Kildare Ireland
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Elf K, Shevchenko G, Nygren I, Larsson L, Bergquist J, Askmark H, Artemenko K. Alterations in muscle proteome of patients diagnosed with amyotrophic lateral sclerosis. J Proteomics 2014; 108:55-64. [PMID: 24846852 DOI: 10.1016/j.jprot.2014.05.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 04/24/2014] [Accepted: 05/11/2014] [Indexed: 12/13/2022]
Abstract
UNLABELLED Amyotrophic lateral sclerosis (ALS) is a motor neuron disease characterized by progressive muscle paralysis. Currently clinical tools for ALS diagnostics do not perform well enough and their improvement is needed. The objective of this study was to identify specific protein alterations related to the development of ALS using tiny muscle biopsies. We applied a shotgun proteomics and quantitative dimethyl labeling in order to analyze the global changes in human skeletal muscle proteome of ALS versus healthy subjects for the first time. 235 proteins were quantified and 11 proteins were found significantly regulated in ALS muscles. These proteins are involved in muscle development and contraction, metabolic processes, enzyme activity, regulation of apoptosis and transport activity. In order to eliminate a risk to confuse ALS with other denervations, muscle biopsies of patients with postpolio syndrome and Charcot-Marie-Tooth disease (negative controls) were compared to those of ALS and controls. Only few proteins significantly regulated in ALS patients compared to controls were affected differently in negative controls. These proteins (BTB and kelch domain-containing protein 10, myosin light chain 3, glycogen debranching enzyme, transitional endoplasmic reticulum ATPase), individually or as a panel, could be selected for estimation of ALS diagnosis and development. BIOLOGICAL SIGNIFICANCE ALS is a devastating neurodegenerative disease, and luckily, very rare: only one to two people out of 100,000 develop ALS yearly. This fact, however, makes studies of ALS very challenging since it is very difficult to collect the representative set of clinical samples and this may take up to several years. In this study we collected the muscle biopsies from 12 ALS patients and compared the ALS muscle proteome against the one from control subjects. We suggested the efficient method for such comprehensive quantitative analysis by LC-MS and performed it for the first time using human ALS material. This gel- and antibody-free method can be widely applied for muscle proteome studies and has been used by us for revealing of the specific protein alterations associated with ALS.
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Affiliation(s)
- Kristin Elf
- Department of Neuroscience, Unit of Neurophysiology, Uppsala University, Uppsala, Sweden
| | - Ganna Shevchenko
- Department of Chemistry-BMC, Analytical Chemistry, Uppsala University, Uppsala, Sweden
| | - Ingela Nygren
- Department of Neuroscience, Unit of Neurology, Uppsala University, Uppsala, Sweden
| | - Lars Larsson
- Department of Neuroscience, Unit of Neurophysiology, Uppsala University, Uppsala, Sweden
| | - Jonas Bergquist
- Department of Chemistry-BMC, Analytical Chemistry, Uppsala University, Uppsala, Sweden
| | - Håkan Askmark
- Department of Neuroscience, Unit of Neurology, Uppsala University, Uppsala, Sweden
| | - Konstantin Artemenko
- Department of Chemistry-BMC, Analytical Chemistry, Uppsala University, Uppsala, Sweden.
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