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Global O-GlcNAcylation changes impact desmin phosphorylation and its partition toward cytoskeleton in C2C12 skeletal muscle cells differentiated into myotubes. Sci Rep 2022; 12:9831. [PMID: 35701470 PMCID: PMC9198038 DOI: 10.1038/s41598-022-14033-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 05/31/2022] [Indexed: 11/09/2022] Open
Abstract
Desmin is the guardian of striated muscle integrity, permitting the maintenance of muscle shape and the efficiency of contractile activity. It is also a key mediator of cell homeostasis and survival. To ensure the fine regulation of skeletal muscle processes, desmin is regulated by post-translational modifications (PTMs). It is more precisely phosphorylated by several kinases connecting desmin to intracellular processes. Desmin is also modified by O-GlcNAcylation, an atypical glycosylation. However, the functional consequence of O-GlcNAcylation on desmin is still unknown, nor its impact on desmin phosphorylation. In a model of C2C12 myotubes, we modulated the global O-GlcNAcylation level, and we determined whether the expression, the PTMs and the partition of desmin toward insoluble material or cytoskeleton were impacted or not. We have demonstrated in the herein paper that O-GlcNAcylation variations led to changes in desmin behaviour. In particular, our data clearly showed that O-GlcNAcylation increase led to a decrease of phosphorylation level on desmin that seems to involve CamKII correlated to a decrease of its partition toward cytoskeleton. Our data showed that phosphorylation/O-GlcNAcylation interplay is highly complex on desmin, supporting that a PTMs signature could occur on desmin to finely regulate its partition (i.e. distribution) with a spatio-temporal regulation.
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2
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Vimentin: Regulation and pathogenesis. Biochimie 2022; 197:96-112. [DOI: 10.1016/j.biochi.2022.02.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 01/11/2022] [Accepted: 02/09/2022] [Indexed: 12/18/2022]
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3
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Liang Y, Li L, Chen Y, Zhang S, Li Z, Xiao J, Wei D. Research Progress on the Role of Intermediate Filament Vimentin in Atherosclerosis. DNA Cell Biol 2021; 40:1495-1502. [PMID: 34931866 DOI: 10.1089/dna.2021.0623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The cytoskeleton is a biopolymer network composed of intermediate filaments, actin, and microtubules, which is the main mechanical structure of cells. Vimentin is an intermediate filament protein that regulates the mechanical and contractile properties of cells, thereby reflecting their mechanical properties. In recent years, the "nonmechanical function" of vimentin inside and outside of cells has attracted extensive attention. The content of vimentin in atherosclerotic plaques is increased, and the serum secretion of vimentin in patients with coronary heart disease is remarkably increased. In this review, the mechanistic and nonmechanistic roles of vimentin in atherosclerosis progression were summarized on the basis of current studies.
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Affiliation(s)
- Yamin Liang
- Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Institute of Cardiovascular Disease, Hengyang Medical College, University of South China, Hengyang, Hunan, China
| | - Lu Li
- Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Institute of Cardiovascular Disease, Hengyang Medical College, University of South China, Hengyang, Hunan, China
| | - Yanmei Chen
- Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Institute of Cardiovascular Disease, Hengyang Medical College, University of South China, Hengyang, Hunan, China
| | - Shulei Zhang
- Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Institute of Cardiovascular Disease, Hengyang Medical College, University of South China, Hengyang, Hunan, China
| | - Zhaozhi Li
- Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Institute of Cardiovascular Disease, Hengyang Medical College, University of South China, Hengyang, Hunan, China
| | - Jinyan Xiao
- YueYang Maternal-Child Medicine Health Hospital Hunan Province Innovative Training Base for Medical Postgraduates, University of China South China and Yueyang Women and Children's Medical Center, Yueyang, Hunan, China
| | - Dangheng Wei
- Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Institute of Cardiovascular Disease, Hengyang Medical College, University of South China, Hengyang, Hunan, China
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Ratnayake WS, Apostolatos CA, Breedy S, Dennison CL, Hill R, Acevedo-Duncan M. Atypical PKCs activate Vimentin to facilitate prostate cancer cell motility and invasion. Cell Adh Migr 2021; 15:37-57. [PMID: 33525953 PMCID: PMC7889213 DOI: 10.1080/19336918.2021.1882782] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Atypical protein kinase C (aPKC) are involved in progression of many human cancers. Vimentin is expressed during epithelial to mesenchymal transition (EMT). Molecular dynamics of Vimentin intermediate filaments (VIFs) play a key role in metastasis. This article is an effort to provide thorough understanding of the relationship between Vimentin and aPKCs . We demonstrate that diminution of aPKCs lead to attenuate prostate cellular metastasis through the downregulation of Vimentin expression. siRNA knocked-down SNAIL1 and PRRX1 reduce aPKC activity along with Vimentin. Results suggest that aPKCs target multiple activation sites (Ser33/39/56) on Vimentin and therefore is essential for VIF dynamics regulation during the metastasis of prostate cancer cells. Understanding the aPKC related molecular mechanisms may provide a novel therapeutic path for prostate carcinoma.
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Affiliation(s)
| | | | - Sloan Breedy
- Department of Chemistry, University of South Florida , Tampa, FL, USA
| | - Clare L Dennison
- Department of Integrative Biology, University of South Florida , Tampa, FL, USA
| | - Robert Hill
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida , Tampa, FL, USA
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Ding I, Ostrowska-Podhorodecka Z, Lee W, Liu RS, Carneiro K, Janmey PA, McCulloch CA. Cooperative roles of PAK1 and filamin A in regulation of vimentin assembly and cell extension formation. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1867:118739. [DOI: 10.1016/j.bbamcr.2020.118739] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 04/30/2020] [Accepted: 05/05/2020] [Indexed: 01/02/2023]
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Vohnoutka RB, Gulvady AC, Goreczny G, Alpha K, Handelman SK, Sexton JZ, Turner CE. The focal adhesion scaffold protein Hic-5 regulates vimentin organization in fibroblasts. Mol Biol Cell 2019; 30:3037-3056. [PMID: 31644368 PMCID: PMC6880880 DOI: 10.1091/mbc.e19-08-0442] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Focal adhesion (FA)-stimulated reorganization of the F-actin cytoskeleton regulates cellular size, shape, and mechanical properties. However, FA cross-talk with the intermediate filament cytoskeleton is poorly understood. Genetic ablation of the FA-associated scaffold protein Hic-5 in mouse cancer-associated fibroblasts (CAFs) promoted a dramatic collapse of the vimentin network, which was rescued following EGFP-Hic-5 expression. Vimentin collapse correlated with a loss of detergent-soluble vimentin filament precursors and decreased vimentin S72/S82 phosphorylation. Additionally, fluorescence recovery after photobleaching analysis indicated impaired vimentin dynamics. Microtubule (MT)-associated EB1 tracking and Western blotting of MT posttranslational modifications indicated no change in MT dynamics that could explain the vimentin collapse. However, pharmacological inhibition of the RhoGTPase Cdc42 in Hic-5 knockout CAFs rescued the vimentin collapse, while pan-formin inhibition with SMIFH2 promoted vimentin collapse in Hic-5 heterozygous CAFs. Our results reveal novel regulation of vimentin organization/dynamics by the FA scaffold protein Hic-5 via modulation of RhoGTPases and downstream formin activity.
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Affiliation(s)
- Rishel B Vohnoutka
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, NY 13210
| | - Anushree C Gulvady
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, NY 13210
| | - Gregory Goreczny
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, NY 13210
| | - Kyle Alpha
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, NY 13210
| | - Samuel K Handelman
- Division of Gastroenterology, Department of Internal Medicine, Michigan Medicine at the University of Michigan, Ann Arbor, MI 48109
| | - Jonathan Z Sexton
- Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109
| | - Christopher E Turner
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, NY 13210
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Src and SHP2 coordinately regulate the dynamics and organization of vimentin filaments during cell migration. Oncogene 2019; 38:4075-4094. [PMID: 30696956 PMCID: PMC6755999 DOI: 10.1038/s41388-019-0705-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Revised: 11/28/2018] [Accepted: 01/04/2019] [Indexed: 12/27/2022]
Abstract
Vimentin intermediate filaments (VIFs), expressed in most mesenchymal and cancer cells, undergo dramatic reorganization during cell migration; however, the mechanism remains obscure. This study demonstrates that upon growth-factor stimulation, Src directly phosphorylates vimentin at Tyr117, leading to VIF disassembly into squiggles and particles at the cell edge during lamellipodia formation. The protein tyrosine phosphatase SHP2 counteracted the Src effects on VIF tyrosine phosphorylation and organization. VIFs formed by vimentin Y117D mutant were more soluble and dynamic than those formed by the wild-type and Y117F mutant. Increased expression of vimentin promoted growth-factor induced lamellipodia formation and cell migration, whereas the mutants suppressed both. The vimentin-induced increase in lamellipodia formation correlated with the activation of Rac and Vav2, with the latter associated with VIFs and recruited to the plasma membrane upon growth-factor stimulation. These results reveal a novel mechanism for regulating VIF dynamics through Src and SHP2 and demonstrate that proper VIF dynamics are important for Rac activation and cell migration.
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Goel RK, Paczkowska M, Reimand J, Napper S, Lukong KE. Phosphoproteomics Analysis Identifies Novel Candidate Substrates of the Nonreceptor Tyrosine Kinase, Src- related Kinase Lacking C-terminal Regulatory Tyrosine and N-terminal Myristoylation Sites (SRMS). Mol Cell Proteomics 2018; 17:925-947. [PMID: 29496907 DOI: 10.1074/mcp.ra118.000643] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Indexed: 01/23/2023] Open
Abstract
SRMS (Src-related kinase lacking C-terminal regulatory tyrosine and N-terminal myristoylation sites), also known as PTK 70 (Protein tyrosine kinase 70), is a non-receptor tyrosine kinase that belongs to the BRK family of kinases (BFKs). To date less is known about the cellular role of SRMS primarily because of the unidentified substrates or signaling intermediates regulated by the kinase. In this study, we used phosphotyrosine antibody-based immunoaffinity purification in large-scale label-free quantitative phosphoproteomics to identify novel candidate substrates of SRMS. Our analyses led to the identification of 1258 tyrosine-phosphorylated peptides which mapped to 663 phosphoproteins, exclusively from SRMS-expressing cells. DOK1, a previously characterized SRMS substrate, was also identified in our analyses. Functional enrichment analyses revealed that the candidate SRMS substrates were enriched in various biological processes including protein ubiquitination, mitotic cell cycle, energy metabolism and RNA processing, as well as Wnt and TNF signaling. Analyses of the sequence surrounding the phospho-sites in these proteins revealed novel candidate SRMS consensus substrate motifs. We utilized customized high-throughput peptide arrays to validate a subset of the candidate SRMS substrates identified in our MS-based analyses. Finally, we independently validated Vimentin and Sam68, as bona fide SRMS substrates through in vitro and in vivo assays. Overall, our study identified a number of novel and biologically relevant SRMS candidate substrates, which suggests the involvement of the kinase in a vast array of unexplored cellular functions.
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Affiliation(s)
- Raghuveera Kumar Goel
- From the ‡Department of Biochemistry, College of Medicine, 107 Wiggins Road, University of Saskatchewan, Saskatoon S7N 5E5, Saskatchewan, Canada
| | - Marta Paczkowska
- §Computational Biology Program, Ontario Institute for Cancer Research, 661 University Ave Suite 510, Toronto M5G 0A3, Ontario, Canada
| | - Jüri Reimand
- §Computational Biology Program, Ontario Institute for Cancer Research, 661 University Ave Suite 510, Toronto M5G 0A3, Ontario, Canada.,¶Department of Medical Biophysics, University of Toronto, 101 College Street Suite 15-701, Toronto M5G 1L7, Ontario, Canada
| | - Scott Napper
- From the ‡Department of Biochemistry, College of Medicine, 107 Wiggins Road, University of Saskatchewan, Saskatoon S7N 5E5, Saskatchewan, Canada.,‖Vaccine and Infectious Disease Organization - International Vaccine Centre (VIDO-InterVac), 120 Veterinary Road, University of Saskatchewan, Saskatoon S7N 5E3, Saskatchewan, Canada
| | - Kiven Erique Lukong
- From the ‡Department of Biochemistry, College of Medicine, 107 Wiggins Road, University of Saskatchewan, Saskatoon S7N 5E5, Saskatchewan, Canada;
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Lautwein T, Lerch S, Schäfer D, Schmidt ER. The serine/threonine kinase 33 is present and expressed in palaeognath birds but has become a unitary pseudogene in neognaths about 100 million years ago. BMC Genomics 2015. [PMID: 26199010 PMCID: PMC4509753 DOI: 10.1186/s12864-015-1769-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Background Serine/threonine kinase 33 (STK33) has been shown to be conserved across all major vertebrate classes including reptiles, mammals, amphibians and fish, suggesting its importance within vertebrates. It has been shown to phosphorylate vimentin and might play a role in spermatogenesis and organ ontogenesis. In this study we analyzed the genomic locus and expression of stk33 in the class Aves, using a combination of large scale next generation sequencing data analysis and traditional PCR. Results Within the subclass Palaeognathae we analyzed the white-throated tinamou (Tinamus guttatus), the African ostrich (Struthio camelus) and the emu (Dromaius novaehollandiae). For the African ostrich we were able to generate a 62,778 bp long genomic contig and an mRNA sequence that encodes a protein showing highly significant similarity to STK33 proteins from other vertebrates. The emu has been shown to encode and transcribe a functional STK33 as well. For the white-throated tinamou we were able to identify 13 exons by sequence comparison encoding a protein similar to STK33 as well. In contrast, in all 28 neognath birds analyzed, we could not find evidence for the existence of a functional copy of stk33 or its expression. In the genomes of these 28 bird species, we found only remnants of the stk33 locus carrying several large genomic deletions, leading to the loss of multiple exons. The remaining exons have acquired various indels and premature stop codons. Conclusions We were able to elucidate and describe the genomic structure and the transcription of a functional stk33 gene within the subclass Palaeognathae, but we could only find degenerate remnants of stk33 in all neognath birds analyzed. This led us to the conclusion that stk33 became a unitary pseudogene in the evolutionary history of the class Aves at the paleognath-neognath branch point during the late cretaceous period about 100 million years ago. We hypothesize that the pseudogenization of stk33 might have become fixed in neognaths due to either genetic redundancy or a non-orthologous gene displacement and present potential candidate genes for such an incident. Electronic supplementary material The online version of this article (doi:10.1186/s12864-015-1769-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Tobias Lautwein
- Institute for Molecular Genetics, Johannes Gutenberg University Mainz, Johann-Joachim-Becherweg 32, 55128, Mainz, Germany.
| | - Steffen Lerch
- Institute for Molecular Genetics, Johannes Gutenberg University Mainz, Johann-Joachim-Becherweg 32, 55128, Mainz, Germany. .,Departement of Neurology, University Medical Center, Johannes Gutenberg-University Mainz, Langenbeckstr.1, 55131, Mainz, Germany.
| | - Daniel Schäfer
- Institute for Molecular Genetics, Johannes Gutenberg University Mainz, Johann-Joachim-Becherweg 32, 55128, Mainz, Germany. .,Departement of Pediatric Oncology, Hematology and Clinical Immunology, University Children's Hospital, Medical Faculty, Heinrich Heine University, Moorenstr. 5, 40225, Düsseldorf, Germany.
| | - Erwin R Schmidt
- Institute for Molecular Genetics, Johannes Gutenberg University Mainz, Johann-Joachim-Becherweg 32, 55128, Mainz, Germany.
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Satelli A, Li S. Vimentin in cancer and its potential as a molecular target for cancer therapy. Cell Mol Life Sci 2011; 68:3033-46. [PMID: 21637948 PMCID: PMC3162105 DOI: 10.1007/s00018-011-0735-1] [Citation(s) in RCA: 1042] [Impact Index Per Article: 80.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Revised: 05/12/2011] [Accepted: 05/16/2011] [Indexed: 02/06/2023]
Abstract
Vimentin, a major constituent of the intermediate filament family of proteins, is ubiquitously expressed in normal mesenchymal cells and is known to maintain cellular integrity and provide resistance against stress. Vimentin is overexpressed in various epithelial cancers, including prostate cancer, gastrointestinal tumors, tumors of the central nervous system, breast cancer, malignant melanoma, and lung cancer. Vimentin's overexpression in cancer correlates well with accelerated tumor growth, invasion, and poor prognosis; however, the role of vimentin in cancer progression remains obscure. In recent years, vimentin has been recognized as a marker for epithelial-mesenchymal transition (EMT). Although EMT is associated with several tumorigenic events, vimentin's role in the underlying events mediating these processes remains unknown. By virtue of its overexpression in cancer and its association with tumor growth and metastasis, vimentin serves as an attractive potential target for cancer therapy; however, more research would be crucial to evaluate its specific role in cancer. Our recent discovery of a vimentin-binding mini-peptide has generated further impetus for vimentin-targeted tumor-specific therapy. Furthermore, research directed toward elucidating the role of vimentin in various signaling pathways would reveal new approaches for the development of therapeutic agents. This review summarizes the expression and functions of vimentin in various types of cancer and suggests some directions toward future cancer therapy utilizing vimentin as a potential molecular target.
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Affiliation(s)
- Arun Satelli
- Department of Pediatrics, Unit 853, The University of Texas MD Anderson Cancer Center, 1515 Holocombe Blvd, Houston, TX 77030 USA
| | - Shulin Li
- Department of Pediatrics, Unit 853, The University of Texas MD Anderson Cancer Center, 1515 Holocombe Blvd, Houston, TX 77030 USA
- UTMD, Graduate School of Biomedical Science, Houston, TX 77030 USA
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Zhao X, Kang B, Lu C, Liu S, Wang H, Yang X, Chen Y, Jiang B, Zhang J, Lu Y, Zhi F. Evaluation of p38 MAPK pathway as a molecular signature in ulcerative colitis. J Proteome Res 2011; 10:2216-25. [PMID: 21428429 DOI: 10.1021/pr100969w] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Early diagnosis and treatment of ulcerative colitis (UC) is clinically challenging. To overcome this problem, we explored the interrelated multiplex signaling pathway to identify molecular signatures in UC by using integrated strategy in proteomics. Intestinal mucosa of 12 UC cases and 12 normal controls underwent comparative proteomic analysis. A total of 26 unique differential proteins were identified, including 12 up-regulated and 14 down-regulated in UC group. A differential protein cluster, consisting of 11 proteins involved in p38 mitogen-activated protein kinase (MAPK) pathway, was deduced and validated by Western blot. Furthermore, three proteins elicited from the protein cluster, phosphorylated p38, MAWBP and galectin-3, as a molecular signature, were analyzed by immunohistochemistry on 118 UC and normal samples. Increased expression of P-p38 and down-regulated MAWBP and/or galectin-3 were detected in UC compared to normal samples (p < 0.001). This signature correlated with disease progression of UC (p < 0.01), and classified UC risk with high sensitivity (94.83 ± 2.91%) and specificity (98.33 ± 1.65%). In addition, P38 MAPK pathway modulated the expression of the protein clusters in macrophage cell line as evidenced by the alteration with specific inhibitor SB203580. These results indicate that molecular signature of P38 MAPK pathway might be a potential biomarker for evaluating UC risk.
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Affiliation(s)
- Xinmei Zhao
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
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12
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Bouamrani A, Ramus C, Gay E, Pelletier L, Cubizolles M, Brugière S, Wion D, Berger F, Issartel JP. Increased phosphorylation of vimentin in noninfiltrative meningiomas. PLoS One 2010; 5:e9238. [PMID: 20169076 PMCID: PMC2821924 DOI: 10.1371/journal.pone.0009238] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2009] [Accepted: 01/24/2010] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Tissue invasion or tissue infiltration are clinical behaviors of a poor-prognosis subset of meningiomas. We carried out proteomic analyses of tissue extracts to discover new markers to accurately distinguish between infiltrative and noninfiltrative meningiomas. METHODOLOGY/PRINCIPAL FINDINGS Protein lysates of 64 different tissue samples (including two brain-invasive and 32 infiltrative tumors) were submitted to SELDI-TOF mass spectrometric analysis. Mass profiles were used to build up both unsupervised and supervised hierarchical clustering. One marker was found at high levels in noninvasive and noninfiltrative tumors and appeared to be a discriminative marker for clustering infiltrative and/or invasive meningiomas versus noninvasive meningiomas in two distinct subsets. Sensitivity and specificity were 86.7% and 100%, respectively. This marker was purified and identified as a multiphosphorylated form of vimentin, a cytoskeletal protein expressed in meningiomas. CONCLUSIONS/SIGNIFICANCE Specific forms of vimentin can be surrogate molecular indicators of the invasive/infiltrative phenotype in tumors.
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Affiliation(s)
- Ali Bouamrani
- Grenoble Institut des Neurosciences, INSERM U836, Université Joseph Fourier, Grenoble, France
| | - Claire Ramus
- Grenoble Institut des Neurosciences, INSERM U836, Université Joseph Fourier, Grenoble, France
| | - Emmanuel Gay
- Department of Neurosurgery and Pathology, Centre Hospitalier Universitaire, Grenoble, France
| | - Laurent Pelletier
- Grenoble Institut des Neurosciences, INSERM U836, Université Joseph Fourier, Grenoble, France
| | | | | | - Didier Wion
- Grenoble Institut des Neurosciences, INSERM U836, Université Joseph Fourier, Grenoble, France
| | - François Berger
- Grenoble Institut des Neurosciences, INSERM U836, Université Joseph Fourier, Grenoble, France
| | - Jean-Paul Issartel
- Grenoble Institut des Neurosciences, INSERM U836, Université Joseph Fourier, Grenoble, France
- Centre National de la Recherche Scientifique (CNRS), Grenoble, France
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Barberis L, Pasquali C, Bertschy-Meier D, Cuccurullo A, Costa C, Ambrogio C, Vilbois F, Chiarle R, Wymann M, Altruda F, Rommel C, Hirsch E. Leukocyte transmigration is modulated by chemokine-mediated PI3Kγ-dependent phosphorylation of vimentin. Eur J Immunol 2009; 39:1136-46. [DOI: 10.1002/eji.200838884] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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14
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Pittenger JT, Hess JF, Budamagunta MS, Voss JC, FitzGerald PG. Identification of phosphorylation-induced changes in vimentin intermediate filaments by site-directed spin labeling and electron paramagnetic resonance. Biochemistry 2008; 47:10863-70. [PMID: 18803396 PMCID: PMC2656440 DOI: 10.1021/bi801137m] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Phosphorylation drives the disassembly of the vimentin intermediate filament (IF) cytoskeleton at mitosis. Chromatographic analysis has suggested that phosphorylation produces a soluble vimentin tetramer, but little has been determined about the structural changes that are caused by phosphorylation or the structure of the resulting tetramer. In this study, site-directed spin labeling and electron paramagnetic resonance (SDSL-EPR) were used to examine the structural changes resulting from protein kinase A phosphorylation of vimentin IFs in vitro. EPR spectra suggest that the tetrameric species resulting from phosphorylation is the A11 configuration. EPR spectra also establish that the greatest degree of structural change was found in the linker 2 and the C-terminal half of the rod domain, despite the fact that most phosphorylation occurs in the N-terminal head domain. The phosphorylation-induced changes notably affected the proposed "trigger sequences" located in the linker 2 region, which have been hypothesized to mediate the induction of coiled-coil formation. These data are the first to document specific changes in IF structure resulting from a physiologic regulatory mechanism and provide further evidence, also generated by SDSL-EPR, that the linker regions play a key role in IF structure and regulation of assembly/disassembly.
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Affiliation(s)
- Josh T. Pittenger
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, CA 95616
| | - John F. Hess
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, CA 95616
| | - Madhu S. Budamagunta
- Department of Biochemistry and Molecular Medicine, School of Medicine, University of California, Davis, CA 95616
| | - John C. Voss
- Department of Biochemistry and Molecular Medicine, School of Medicine, University of California, Davis, CA 95616
| | - Paul G. FitzGerald
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, CA 95616
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15
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Höllrigl A, Hofner M, Stary M, Weitzer G. Differentiation of cardiomyocytes requires functional serine residues within the amino-terminal domain of desmin. Differentiation 2007; 75:616-26. [PMID: 17381546 PMCID: PMC7615843 DOI: 10.1111/j.1432-0436.2007.00163.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Desmin contributes to the stability of the myocardium and its amino-terminal domain influences intermediate filament formation and interacts with a variety of proteins and DNAs. Specific serine residues located in this domain are reversibly phosphorylated in a cell cycle and developmental stage-dependent manner as has been demonstrated also for other cytoplasmic type III intermediate filament proteins. Although absence of desmin apparently does not affect cardiomyogenesis, homozygous deletion of the amino-terminal domain of desmin severely inhibited in vitro cardiomyogenesis. To demonstrate the significance of phosphorylation of this domain in cardiomyogenic commitment and differentiation, we inhibited phosphorylation of serine residues 6, 7, and 8 by mutation to alanine, and investigated early cardiomyogenesis in heterozygous embryoid bodies. As control, serine residues 31 and 32, which are not phosphorylated by kinases mutating serine residues 6, 7, and 8, were mutated to alanine in a second set. Desmin(S6,7,8A) interfered with cardiomyogenesis and myofibrillogenesis in a dominant negative fashion, whereas desmin(S31,32A) produced only a mild phenotype. Desmin(S6,7,8A) led to the down-regulation of the transcription factor genes brachyury, goosecoid, nkx2.5, and mef2C and increased apoptosis of presumptive mesoderm and differentiating cardiomyocytes. Surviving cardiomyocytes which were few in number had no myofibrils. Demonstration that some but not any mutant desmin interfered with the very beginning of cardiomyogenesis suggests an important function of temporarily phosphorylated serine residues 6, 7, and 8 in the amino-terminal domain of desmin in cardiomyogenic commitment and differentiation.
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Affiliation(s)
- Alexandra Höllrigl
- Max F. Perutz Laboratories, Department of Medical Biochemistry, Medical University of Vienna, Dr. Bohrgasse 9, A1030 Vienna, Austria
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16
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Zamoner A, Barreto KP, Filho DW, Sell F, Woehl VM, Guma FCR, Silva FRMB, Pessoa-Pureur R. Hyperthyroidism in the developing rat testis is associated with oxidative stress and hyperphosphorylated vimentin accumulation. Mol Cell Endocrinol 2007; 267:116-26. [PMID: 17306450 DOI: 10.1016/j.mce.2007.01.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2006] [Revised: 01/06/2007] [Accepted: 01/09/2007] [Indexed: 12/20/2022]
Abstract
Hyperthyroidism was induced in rats and somatic indices and metabolic parameters were analyzed in testis. In addition, the morphological analysis evidenced testes maturation and intense protein synthesis and processing, supporting the enhancement in vimentin synthesis in hyperthyroid testis. Furthermore, vimentin phosphorylation was increased, indicating an accumulation of phosphorylated vimentin associated to the cytoskeleton, which could be a consequence of the extracellular-regulated kinase (ERK) activation regulating the cytoskeleton. Biomarkers of oxidative stress demonstrated an increased basal metabolic rate measured by tissue oxygen consumption, as well as, increased TBARS levels. In addition, the enzymatic and non-enzymatic antioxidant defences appeared to respond according to the augmented oxygen consumption. We observed decreased total glutathione levels, with enhancement of reduced glutathione, whereas most of the antioxidant enzyme activities were induced. Otherwise, superoxide dismutase activity was inhibited. These results support the idea that an increase in mitochondrial ROS generation, underlying cellular oxidative damage, is a side effect of hyperthyroid-induced biochemical changes by which rat testis increase their metabolic capacity.
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Affiliation(s)
- Ariane Zamoner
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Porto Alegre, RS, Brazil
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17
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Zamoner A, Corbelini PF, Funchal C, Menegaz D, Silva FRMB, Pessoa-Pureur R. Involvement of calcium-dependent mechanisms in T3-induced phosphorylation of vimentin of immature rat testis. Life Sci 2005; 77:3321-35. [PMID: 15985269 DOI: 10.1016/j.lfs.2005.05.042] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2004] [Accepted: 05/09/2005] [Indexed: 11/29/2022]
Abstract
Thyroid hormones have been shown to act at extra nuclear sites, inducing target cell responses by several mechanisms, frequently involving intracellular calcium concentration. It has also been reported that cytoskeletal proteins are a target for thyroid and steroid hormones and cytoskeletal rearrangements are observed during hormone-induced differentiation and development of rat testes. However, little is known about the effect of 3,5,3'-triiodo-L-thyronine (T3) on the intermediate filament (IF) vimentin in rat testes. In this study we investigated the immunocontent and in vitro phosphorylation of vimentin in the cytoskeletal fraction of immature rat testes after a short-term in vitro treatment with T3. Gonads were incubated with or without T3 and 32P orthophosphate for 30 min and the intermediate filament-enriched cytoskeletal fraction was extracted in a high salt Triton-containing buffer. Vimentin immunoreactivity was analyzed by immunoblotting and the in vitro 32P incorporation into this protein was measured. Results showed that 1 microM T3 was able to increase the vimentin immunoreactivity and in vitro phosphorylation in the cytoskeletal fraction without altering total vimentin immunocontent in immature rat testes. Besides, these effects were independent of active protein synthesis. The involvement of Ca2+-mediated mechanisms in vimentin phosphorylation was evident when specific channel blockers (verapamil and nifedipine) or chelating agents (EGTA and BAPTA) were added during pre-incubation and incubation of the testes with T3. The effect of T3 was prevented when Ca2+ influx was blocked or intracellular Ca2+ was chelated. These results demonstrate a rapid nongenomic Ca2+-dependent action of T3 in phosphorylating vimentin in immature rat testes.
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Affiliation(s)
- Ariane Zamoner
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2600 anexo CEP 90035-003 Porto Alegre RS Brazil
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18
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Ermakova S, Choi BY, Choi HS, Kang BS, Bode AM, Dong Z. The intermediate filament protein vimentin is a new target for epigallocatechin gallate. J Biol Chem 2005; 280:16882-90. [PMID: 15713670 DOI: 10.1074/jbc.m414185200] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Epigallocatechin gallate (EGCG) is the major active polyphenol in green tea. Protein interaction with EGCG is a critical step in the effects of EGCG on the regulation of various key proteins involved in signal transduction. We have identified a novel molecular target of EGCG using affinity chromatography, two-dimensional electrophoresis, and mass spectrometry for protein identification. Spots of interest were identified as the intermediate filament, vimentin. The identification was confirmed by Western blot analysis using an anti-vimentin antibody. Experiments using a pull-down assay with [3H]EGCG demonstrate binding of EGCG to vimentin with a Kd of 3.3 nm. EGCG inhibited phosphorylation of vimentin at serines 50 and 55 and phosphorylation of vimentin by cyclin-dependent kinase 2 and cAMP-dependent protein kinase. EGCG specifically inhibits cell proliferation by binding to vimentin. Because vimentin is important for maintaining cellular functions and is essential in maintaining the structure and mechanical integration of the cellular space, the inhibitory effect of EGCG on vimentin may further explain its anti-tumor-promoting effect.
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MESH Headings
- Amino Acid Sequence
- Animals
- Anticarcinogenic Agents/pharmacology
- Antineoplastic Agents/pharmacology
- Blotting, Western
- Catechin/analogs & derivatives
- Catechin/chemistry
- Cell Line
- Cell Proliferation
- Chromatography, Affinity
- Cyclic AMP-Dependent Protein Kinases/chemistry
- Dose-Response Relationship, Drug
- Electrophoresis, Gel, Two-Dimensional
- Flavonoids/chemistry
- Genetic Vectors
- Glutathione Transferase/metabolism
- Humans
- Immunoprecipitation
- Inhibitory Concentration 50
- Kinetics
- Mice
- Microscopy, Fluorescence
- Models, Chemical
- Molecular Sequence Data
- Peptides/chemistry
- Phenols/chemistry
- Phosphorylation
- Polyphenols
- Protein Binding
- Protein Structure, Tertiary
- RNA, Small Interfering/metabolism
- Serine/chemistry
- Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
- Time Factors
- Vimentin/chemistry
- Vimentin/metabolism
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Affiliation(s)
- Svetlana Ermakova
- Hormel Institute, University of Minnesota, Austin, Minnesota 55912, USA
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19
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Herrmann H, Aebi U. Intermediate filaments: molecular structure, assembly mechanism, and integration into functionally distinct intracellular Scaffolds. Annu Rev Biochem 2004; 73:749-89. [PMID: 15189158 DOI: 10.1146/annurev.biochem.73.011303.073823] [Citation(s) in RCA: 506] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The superfamily of intermediate filament (IF) proteins contains at least 65 distinct proteins in man, which all assemble into approximately 10 nm wide filaments and are principal structural elements both in the nucleus and the cytoplasm with essential scaffolding functions in metazoan cells. At present, we have only circumstantial evidence of how the highly divergent primary sequences of IF proteins lead to the formation of seemingly similar polymers and how this correlates with their function in individual cells and tissues. Point mutations in IF proteins, particularly in lamins, have been demonstrated to lead to severe, inheritable multi-systemic diseases, thus underlining their importance at several functional levels. Recent structural work has now begun to shed some light onto the complex fine tuning of structure and function in these fibrous, coiled coil forming multidomain proteins and their contribution to cellular physiology and gene regulation.
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Affiliation(s)
- Harald Herrmann
- Department of Cell Biology, German Cancer Research Center, D-69120 Heidelberg, Germany.
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20
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Chrestensen CA, Schroeder MJ, Shabanowitz J, Hunt DF, Pelo JW, Worthington MT, Sturgill TW. MAPKAP kinase 2 phosphorylates tristetraprolin on in vivo sites including Ser178, a site required for 14-3-3 binding. J Biol Chem 2003; 279:10176-84. [PMID: 14688255 DOI: 10.1074/jbc.m310486200] [Citation(s) in RCA: 226] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
MAPKAP kinase 2 (MK2) is required for tumor necrosis factor synthesis. Tristetraprolin (TTP) binds to the 3'-untranslated region of tumor necrosis factor mRNA and regulates its fate. We identified in vitro and in vivo phosphorylation sites in TTP using nanoflow high pressure liquid chromatography microelectrospray ionization tandem mass spectrometry and novel methods for direct digestion of TTP bound to affinity matrices (GSH-beads or anti-Myc linked to magnetic beads). MK2Delta3B, activated in Escherichia coli by p38alpha, phosphorylates TTP in vitro at major sites Ser(52) and Ser(178) (>10-fold in abundance) as well as at several minor sites that were detected after enriching for phosphopeptides with immobilized metal affinity chromatography. MK2 phosphorylation of TTP creates a functional 14-3-3 binding site. In cells, TTP was phosphorylated at Ser(52), Ser(178), Thr(250), and Ser(316) and at SP sites in a cluster (Ser(80)/Ser(82)/Ser(85)). Anisomycin treatment of NIH 3T3 cells increased phosphorylation of Ser(52) and Ser(178). Overexpression of MK2 sufficed to increase phosphorylation of Ser(52) and Ser(178) but not Ser(80)/Ser(82)/Ser(85) or Thr(250). Thus, Ser(52) and Ser(178) are putative MK2 sites in vivo. Identified phosphosite(s) may be biologic switches controlling mRNA stability and translation.
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Affiliation(s)
- Carol A Chrestensen
- Department of Pharmacology, University of Virginia Health Sciences Center, Charlottesville 22908, USA
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