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Klopsch C, Skorska A, Ludwig M, Gaebel R, Lemcke H, Kleiner G, Beyer M, Vollmar B, David R, Steinhoff G. Cardiac Mesenchymal Stem Cells Proliferate Early in the Ischemic Heart. Eur Surg Res 2017; 58:341-353. [PMID: 29073604 DOI: 10.1159/000480730] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 08/28/2017] [Indexed: 12/16/2022]
Abstract
BACKGROUND/PURPOSE Cardiac mesenchymal stem cells (MSCs) could stimulate cell-specific regenerative mechanisms after myocardial infarction (MI) depending on spatial origin, distribution, and niche regulation. We aimed at identifying and isolating tissue-specific cardiac MSCs that could contribute to regeneration. METHODS Following permanent ligation of the left anterior descending coronary artery in rats (n = 16), early cardiac tissues and cardiac mononuclear cells (MNCs) were analyzed by immunohistology, confocal laser scanning microscopy, and flow cytometry, respectively. Early postischemic specific MSCs were purified by fluorescence-activated cell sorting, cultivated under standardized culture conditions, and tested for multipotent differentiation in functional identification kits. RESULTS Cardiac MSC niches were detected intramyocardially in cell clusters after MI and characterized by positive expression for vimentin, CD29, CD44, CD90, CD105, PDGFRα, and DDR2. Following myocardial ischemia, proliferation was induced early and proliferation density was approximately 11% in intramyocardial MSC clusters of the peri-infarction border zone. Cluster sizes increased by 157 and 64% in the peri-infarction and noninfarcted areas of infarcted hearts compared with noninfarcted hearts 24 h following MI, respectively. Coincidentally, flow cytometry analyses illustrated postischemic moderate enrichments of CD45-CD44+ and CD45-DDR2+ cardiac MNCs. We enabled isolation of early postischemic culturable cardiac CD45-CD44+DDR2+ MSCs that demonstrated typical clonogenicity with colony-forming unit-fibroblast formation as well as adipogenic, chondrogenic, and osteogenic differentiation. CONCLUSIONS MI triggered early proliferation in specific cardiac MSC niches that were organized in intramyocardial clusters. Following targeted isolation, early postischemic cardiac CD45-CD44+DDR2+ MSCs exhibited typical characteristics with multipotent differentiation capacity and clonogenic expansion.
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Affiliation(s)
- Christian Klopsch
- Reference and Translation Center for Cardiac Stem Cell Therapy, Rostock University Medical Center, Rostock, Germany.,Department of Cardiac Surgery, Rostock University Medical Center, Rostock, Germany
| | - Anna Skorska
- Reference and Translation Center for Cardiac Stem Cell Therapy, Rostock University Medical Center, Rostock, Germany.,Department of Cardiac Surgery, Rostock University Medical Center, Rostock, Germany
| | - Marion Ludwig
- Reference and Translation Center for Cardiac Stem Cell Therapy, Rostock University Medical Center, Rostock, Germany.,Department of Cardiac Surgery, Rostock University Medical Center, Rostock, Germany
| | - Ralf Gaebel
- Reference and Translation Center for Cardiac Stem Cell Therapy, Rostock University Medical Center, Rostock, Germany.,Department of Cardiac Surgery, Rostock University Medical Center, Rostock, Germany
| | - Heiko Lemcke
- Reference and Translation Center for Cardiac Stem Cell Therapy, Rostock University Medical Center, Rostock, Germany.,Department of Cardiac Surgery, Rostock University Medical Center, Rostock, Germany
| | - Gabriela Kleiner
- Reference and Translation Center for Cardiac Stem Cell Therapy, Rostock University Medical Center, Rostock, Germany.,Department of Cardiac Surgery, Rostock University Medical Center, Rostock, Germany
| | - Martin Beyer
- Reference and Translation Center for Cardiac Stem Cell Therapy, Rostock University Medical Center, Rostock, Germany.,Department of Cardiac Surgery, Rostock University Medical Center, Rostock, Germany
| | - Brigitte Vollmar
- Institute of Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Robert David
- Reference and Translation Center for Cardiac Stem Cell Therapy, Rostock University Medical Center, Rostock, Germany.,Department of Cardiac Surgery, Rostock University Medical Center, Rostock, Germany.,Department Life, Light and Matter, University of Rostock, Rostock, Germany
| | - Gustav Steinhoff
- Reference and Translation Center for Cardiac Stem Cell Therapy, Rostock University Medical Center, Rostock, Germany.,Department of Cardiac Surgery, Rostock University Medical Center, Rostock, Germany.,Department Life, Light and Matter, University of Rostock, Rostock, Germany
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Rohrbeck A, Höltje M, Adolf A, Oms E, Hagemann S, Ahnert-Hilger G, Just I. The Rho ADP-ribosylating C3 exoenzyme binds cells via an Arg-Gly-Asp motif. J Biol Chem 2017; 292:17668-17680. [PMID: 28882889 PMCID: PMC5663871 DOI: 10.1074/jbc.m117.798231] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 08/28/2017] [Indexed: 12/11/2022] Open
Abstract
The Rho ADP-ribosylating C3 exoenzyme (C3bot) is a bacterial protein toxin devoid of a cell-binding or -translocation domain. Nevertheless, C3 can efficiently enter intact cells, including neurons, but the mechanism of C3 binding and uptake is not yet understood. Previously, we identified the intermediate filament vimentin as an extracellular membranous interaction partner of C3. However, uptake of C3 into cells still occurs (although reduced) in the absence of vimentin, indicating involvement of an additional host cell receptor. C3 harbors an Arg–Gly–Asp (RGD) motif, which is the major integrin-binding site, present in a variety of integrin ligands. To check whether the RGD motif of C3 is involved in binding to cells, we performed a competition assay with C3 and RGD peptide or with a monoclonal antibody binding to β1-integrin subunit and binding assays in different cell lines, primary neurons, and synaptosomes with C3-RGD mutants. Here, we report that preincubation of cells with the GRGDNP peptide strongly reduced C3 binding to cells. Moreover, mutation of the RGD motif reduced C3 binding to intact cells and also to recombinant vimentin. Anti-integrin antibodies also lowered the C3 binding to cells. Our results indicate that the RGD motif of C3 is at least one essential C3 motif for binding to host cells and that integrin is an additional receptor for C3 besides vimentin.
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Affiliation(s)
- Astrid Rohrbeck
- From the Institute of Toxicology, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625 Hannover and
| | - Markus Höltje
- the Institute of Integrative Neuroanatomy, Charité-Universitätsmedizin, D-10115 Berlin, Germany
| | - Andrej Adolf
- the Institute of Integrative Neuroanatomy, Charité-Universitätsmedizin, D-10115 Berlin, Germany
| | - Elisabeth Oms
- From the Institute of Toxicology, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625 Hannover and
| | - Sandra Hagemann
- From the Institute of Toxicology, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625 Hannover and
| | - Gudrun Ahnert-Hilger
- the Institute of Integrative Neuroanatomy, Charité-Universitätsmedizin, D-10115 Berlin, Germany
| | - Ingo Just
- From the Institute of Toxicology, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625 Hannover and
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53
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Schäfer G, Graham LM, Lang DM, Blumenthal MJ, Bergant Marušič M, Katz AA. Vimentin Modulates Infectious Internalization of Human Papillomavirus 16 Pseudovirions. J Virol 2017; 91:e00307-17. [PMID: 28566373 PMCID: PMC5533935 DOI: 10.1128/jvi.00307-17] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 05/19/2017] [Indexed: 01/13/2023] Open
Abstract
Human papillomavirus (HPV) infection is the most common viral infection of the reproductive tract, with virtually all cases of cervical cancer being attributable to infection by oncogenic HPVs. However, the exact mechanism and receptors used by HPV to infect epithelial cells are controversial. The current entry model suggests that HPV initially attaches to heparan sulfate proteoglycans (HSPGs) at the cell surface, followed by conformational changes, cleavage by furin convertase, and subsequent transfer of the virus to an as-yet-unidentified high-affinity receptor. In line with this model, we established an in vitro infection system using the HSPG-deficient cell line pgsD677 together with HPV16 pseudovirions (HPV16-PsVs). While pgsD677 cells were nonpermissive for untreated HPV16-PsVs, furin cleavage of the particles led to a substantial increase in infection. Biochemical pulldown assays followed by mass spectrometry analysis showed that furin-precleaved HPV16-PsVs specifically interacted with surface-expressed vimentin on pgsD677 cells. We further demonstrated that both furin-precleaved and uncleaved HPV16-PsVs colocalized with surface-expressed vimentin on pgsD677, HeLa, HaCaT, and NIKS cells, while binding of incoming viral particles to soluble vimentin protein before infection led to a substantial decrease in viral uptake. Interestingly, decreasing cell surface vimentin by small interfering RNA (siRNA) knockdown in HeLa and NIKS cells significantly increased HPV16-PsV infectious internalization, while overexpression of vimentin had the opposite effect. The identification of vimentin as an HPV restriction factor enhances our understanding of the initial steps of HPV-host interaction and may lay the basis for the design of novel antiviral drugs preventing HPV internalization into epithelial cells.IMPORTANCE Despite HPV being a highly prevalent sexually transmitted virus causing significant disease burden worldwide, particularly cancer of the cervix, cell surface events preceding oncogenic HPV internalization are poorly understood. We herein describe the identification of surface-expressed vimentin as a novel molecule not previously implicated in the infectious internalization of HPV16. Contrary to our expectations, vimentin was found to act not as a receptor but rather as a restriction factor dampening the initial steps of HPV16 infection. These results importantly contribute to our current understanding of the molecular events during the infectious internalization of HPV16 and open a new direction in the development of alternative drugs to prevent HPV infection.
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Affiliation(s)
- Georgia Schäfer
- Division of Medical Biochemistry and Structural Biology, Department of Integrative Biomedical Sciences, University of Cape Town, Cape Town, South Africa
- Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
- UCT Receptor Biology Research Unit, University of Cape Town, Cape Town, South Africa
- SA-MRC Gynecology Cancer Research Centre, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Lisa M Graham
- Division of Medical Biochemistry and Structural Biology, Department of Integrative Biomedical Sciences, University of Cape Town, Cape Town, South Africa
- Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
- UCT Receptor Biology Research Unit, University of Cape Town, Cape Town, South Africa
- SA-MRC Gynecology Cancer Research Centre, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Dirk M Lang
- Division of Physiological Sciences, Department of Human Biology, University of Cape Town, Cape Town, South Africa
| | - Melissa J Blumenthal
- Division of Medical Biochemistry and Structural Biology, Department of Integrative Biomedical Sciences, University of Cape Town, Cape Town, South Africa
- Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
- UCT Receptor Biology Research Unit, University of Cape Town, Cape Town, South Africa
- SA-MRC Gynecology Cancer Research Centre, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Martina Bergant Marušič
- Laboratory for Environmental and Life Sciences, University of Nova Gorica, Nova Gorica, Slovenia
| | - Arieh A Katz
- Division of Medical Biochemistry and Structural Biology, Department of Integrative Biomedical Sciences, University of Cape Town, Cape Town, South Africa
- Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
- UCT Receptor Biology Research Unit, University of Cape Town, Cape Town, South Africa
- SA-MRC Gynecology Cancer Research Centre, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
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54
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Mary S, Kulkarni MJ, Mehendale SS, Joshi SR, Giri AP. Differential accumulation of vimentin fragments in preeclamptic placenta. Cytoskeleton (Hoboken) 2017; 74:420-425. [PMID: 28752964 DOI: 10.1002/cm.21390] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 06/02/2017] [Accepted: 07/26/2017] [Indexed: 12/20/2022]
Abstract
Preeclampsia is a pregnancy complication that is the result of abnormal placentation because of inadequate trophoblast invasion into spiral arteries that prevent normal blood flow to the placenta. We report the alteration in vimentin protein proteolysis in placenta of normotensive and preeclamptic women, which is known to have a role in many physiological functions other than its major function in the structural integrity of the cell. Placental proteome from normotensive (n = 25) and preeclamptic pregnancies (n = 25) showed eight differentially accumulated protein spots of vimentin (proteolytic fragments) by two-dimensional electrophoresis. Immunoblots of normotensive and preeclamptic placenta revealed a difference in proteolytic processing of vimentin. In particular, lower molecular weight vimentin fragments of 32 and 20 kDa were 3.3 and 2.6-fold (p < 0.0001) higher, respectively, in preeclampsia compared with normotensive placenta.
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Affiliation(s)
- Sheon Mary
- Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune, Maharashtra, 411008, India
| | - Mahesh J Kulkarni
- Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune, Maharashtra, 411008, India
| | - Savita S Mehendale
- Department of Gynecology, Bharati Vidyapeeth Medical College, Pune, Maharashtra, 411043, India
| | - Sadhana R Joshi
- Department of Nutritional Medicine, Interactive Research School for Health Affairs, Bharati Vidyapeeth University, Pune, Maharashtra, 411043, India
| | - Ashok P Giri
- Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune, Maharashtra, 411008, India
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Tomiyama L, Kamino H, Fukamachi H, Urano T. Precise epitope determination of the anti-vimentin monoclonal antibody V9. Mol Med Rep 2017; 16:3917-3921. [PMID: 28765898 PMCID: PMC5646970 DOI: 10.3892/mmr.2017.7102] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 03/07/2017] [Indexed: 12/26/2022] Open
Abstract
Vimentin is a type III intermediate filament protein that is typically expressed in mesenchymal cells. Overexpression of vimentin is frequently observed in several types of cancer and is often associated with epithelial‑to‑mesenchymal transition. It was recently reported that the serum vimentin level is significantly elevated in colon and liver tumors. Therefore, a more sensitive vimentin detection system may be useful for cancer screening and early detection. The V9 mouse monoclonal antibody (mAb), which recognizes the human vimentin protein, is widely used in routine pathology to identify mesenchymal cells using immunohistochemical analysis. Although it has been suggested that the epitope of the V9 mAb is located within the C‑terminal region of vimentin, the precise amino acid sequence that it recognizes has not yet been identified. In the present study, we constructed several deletion mutants of the vimentin protein and examined their reactivity with the V9 mAb to accurately map its epitope. We confirmed that its epitope resides in the C‑terminal region of vimentin, between amino acids 392‑466. Additionally, cross‑species comparison of amino acid sequence alignment of vimentin, as well as site‑directed mutagenesis, revealed that one residue, the asparagine at position 417, is critical for antibody binding. Using smaller vimentin fragments ranging in length from 9 to 13 residues, each containing this critical asparagine, we determined that the minimal residues required for V9 mAb recognition of human vimentin are the thirteen amino acid residues at positions 411-423 (411ISLPLPNFSSLNL423).
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Affiliation(s)
- Lucia Tomiyama
- Department of Biochemistry, Shimane University Faculty of Medicine, Izumo 693‑8501, Japan
| | - Hiroki Kamino
- Department of Biochemistry, Shimane University Faculty of Medicine, Izumo 693‑8501, Japan
| | - Hiroki Fukamachi
- Department of Biochemistry, Shimane University Faculty of Medicine, Izumo 693‑8501, Japan
| | - Takeshi Urano
- Department of Biochemistry, Shimane University Faculty of Medicine, Izumo 693‑8501, Japan
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56
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Durocher I, Noël C, Lavastre V, Girard D. Evaluation of the in vitro and in vivo proinflammatory activities of gold (+) and gold (-) nanoparticles. Inflamm Res 2017; 66:981-992. [PMID: 28676918 DOI: 10.1007/s00011-017-1078-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 06/22/2017] [Accepted: 06/26/2017] [Indexed: 01/03/2023] Open
Abstract
OBJECTIVE AND DESIGN The aim of this study was to determine potential effects of gold (+) and gold (-) nanoparticles, AuNP(+) and AuNP(-), on neutrophil biology. MATERIAL OR SUBJECTS Freshly isolated human neutrophils were used for the in vitro aspects and CD-1 mice were used in the in vivo murine air pouch model of acute neutrophilic inflammation. TREATMENT Human neutrophils were treated with the indicated concentrations of AuNP(+) or AuNP(-) in vitro and mice received 100 or 500 µg/ml AuNP(+) or AuNP(-) into air pouches. METHODS Cellular uptake of AuNP by neutrophils was confirmed by transmission electron microscopy and the ability of the NP to modulate apoptosis, gelatinase activity, and chemokine production and chemotaxis was determined by cytology, zymography, ELISArray, antibody array, and ELISA and by a micro-chemotaxis chamber, respectively. In vivo, exudates were harvested after 6 h to determine the leukocyte infiltration to detect the production of several cytokines by an antibody array approach and ELISA. One-way analysis of variance was used for statistical analysis. RESULTS AuNP possess proinflammatory activities in vitro and induce mainly a neutrophil influx in vivo, albeit at different degrees. CONCLUSIONS AuNP(+) and AuNP(-) should be added as new candidates into a growing list of NP having proinflammatory activities by themselves.
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Affiliation(s)
- Isabelle Durocher
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, Institut National de la Recherche Scientifique (INRS)-Institut Armand-Frappier, 531 Boulevard des Prairies, Laval, QC, H7V1B7, Canada
| | - Claudie Noël
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, Institut National de la Recherche Scientifique (INRS)-Institut Armand-Frappier, 531 Boulevard des Prairies, Laval, QC, H7V1B7, Canada
| | - Valérie Lavastre
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, Institut National de la Recherche Scientifique (INRS)-Institut Armand-Frappier, 531 Boulevard des Prairies, Laval, QC, H7V1B7, Canada
| | - Denis Girard
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, Institut National de la Recherche Scientifique (INRS)-Institut Armand-Frappier, 531 Boulevard des Prairies, Laval, QC, H7V1B7, Canada.
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Yung S, Yap DYH, Chan TM. Recent advances in the understanding of renal inflammation and fibrosis in lupus nephritis. F1000Res 2017; 6:874. [PMID: 28663794 PMCID: PMC5473406 DOI: 10.12688/f1000research.10445.1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/12/2017] [Indexed: 01/08/2023] Open
Abstract
Lupus nephritis is a potentially reversible cause of severe acute kidney injury and is an important cause of end-stage renal failure in Asians and patients of African or Hispanic descent. It is characterized by aberrant exaggerated innate and adaptive immune responses, autoantibody production and their deposition in the kidney parenchyma, triggering complement activation, activation and proliferation of resident renal cells, and expression of pro-inflammatory and chemotactic molecules leading to the influx of inflammatory cells, all of which culminate in destruction of normal nephrons and their replacement by fibrous tissue. Anti-double-stranded DNA (anti-dsDNA) antibody level correlates with disease activity in most patients. There is evidence that apart from mediating pathogenic processes through the formation of immune complexes, pathogenic anti-dsDNA antibodies can bind to resident renal cells and induce downstream pro-apoptotic, pro-inflammatory, or pro-fibrotic processes or a combination of these. Recent data also highlight the critical role of macrophages in acute and chronic kidney injury. Though clinically effective, current treatments for lupus nephritis encompass non-specific immunosuppression and the anti-inflammatory action of high-dose corticosteroids. The clinical and histological impact of novel biologics targeting pro-inflammatory molecules remains to be investigated. Insight into the underlying mechanisms that induce inflammatory and fibrotic processes in the kidney of lupus nephritis could present opportunities for more specific novel treatment options to improve clinical outcomes while minimizing off-target untoward effects. This review discusses recent advances in the understanding of pathogenic mechanisms leading to inflammation and fibrosis of the kidney in lupus nephritis in the context of established standard-of-care and emerging therapies.
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Affiliation(s)
- Susan Yung
- Department of Medicine, University of Hong Kong, Hong Kong, Hong Kong
| | - Desmond YH Yap
- Department of Medicine, University of Hong Kong, Hong Kong, Hong Kong
| | - Tak Mao Chan
- Department of Medicine, University of Hong Kong, Hong Kong, Hong Kong
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Lopez-Soler RI, Borgia JA, Kanangat S, Fhied CL, Conti DJ, Constantino D, Ata A, Chan R, Wang Z. Anti-vimentin Antibodies Present at the Time of Transplantation May Predict Early Development of Interstitial Fibrosis/Tubular Atrophy. Transplant Proc 2017; 48:2023-33. [PMID: 27569939 DOI: 10.1016/j.transproceed.2016.04.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 04/27/2016] [Indexed: 12/15/2022]
Abstract
BACKGROUND Anti-vimentin (a cytoskeletal protein) autoantibodies in renal transplant recipients have been correlated with interstitial fibrosis/tubular atrophy (IFTA). In this study, we examine the association between pretransplantation anti-vimentin antibodies and the subsequent development of IFTA. METHODS Sera obtained before renal transplantation from 97 transplant recipients were analyzed for the presence of anti-vimentin antibodies via Luminex assays to determine the concentration of anti-vimentin antibodies. Results were correlated with findings of IFTA on biopsy as well as graft function and patient and graft survival. RESULTS In our patient population, 56 of 97 patients were diagnosed by biopsy with IFTA 2.9 (±2.1) years after renal transplantation. Patients with IFTA on biopsy had higher mean concentration of anti-vimentin antibodies when compared to patients without IFTA (32.2 μg/mL [3.97-269.12 μg/mL] vs 14.57 μg/mL [4.71-87.81 μg/mL]). The risk of developing IFTA with a concentration of anti-vimentin antibody >15 μg/mL before transplantation was 1.96 (95% CI = 1.38-2.79, P = .011). Patients with elevated anti-vimentin antibody concentrations (>15 μg/mL) at the time of transplantation also had a higher risk of developing IFTA (81.4% vs 41.2%; P < .05). In addition, graft function was worse at 1, 3, and 5 years posttransplantation in patients with elevated concentrations of pretransplantation anti-vimentin antibody. Although there were more graft losses in the IFTA groups (49.12% vs 25.64%, P = .021) and the IFTA patients loss their grafts earlier (4.3 years vs 3.6 years), there was no statistical difference in graft loss rates. CONCLUSIONS Pretransplantation anti-vimentin antibody concentrations >15 μg/mL may be a risk factor for IFTA.
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Affiliation(s)
- R I Lopez-Soler
- Division of Surgery, Section of Transplantation, Albany Medical Center, Albany, New York.
| | - J A Borgia
- Department of Biochemistry, Rush University Medical Center, Chicago, Illinois; Department of Pathology, Rush University Medical Center, Chicago, Illinois
| | - S Kanangat
- Department of Pathology, Rush University Medical Center, Chicago, Illinois
| | - C L Fhied
- Department of Pathology, Rush University Medical Center, Chicago, Illinois
| | - D J Conti
- Division of Surgery, Section of Transplantation, Albany Medical Center, Albany, New York
| | - D Constantino
- Transplant Immunology Laboratory, Albany Medical College, Albany, New York
| | - A Ata
- Division of Surgery, Section of Transplantation, Albany Medical Center, Albany, New York
| | - R Chan
- Division of Surgery, Section of Transplantation, Albany Medical Center, Albany, New York
| | - Z Wang
- Center For Cardiovascular Sciences, Albany Medical College, Albany, New York
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Senescent cells expose and secrete an oxidized form of membrane-bound vimentin as revealed by a natural polyreactive antibody. Proc Natl Acad Sci U S A 2017; 114:E1668-E1677. [PMID: 28193858 DOI: 10.1073/pnas.1614661114] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Studying the phenomenon of cellular senescence has been hindered by the lack of senescence-specific markers. As such, detection of proteins informally associated with senescence accompanies the use of senescence-associated β-galactosidase as a collection of semiselective markers to monitor the presence of senescent cells. To identify novel biomarkers of senescence, we immunized BALB/c mice with senescent mouse lung fibroblasts and screened for antibodies that recognized senescence-associated cell-surface antigens by FACS analysis and a newly developed cell-based ELISA. The majority of antibodies that we isolated, cloned, and sequenced belonged to the IgM isotype of the innate immune system. In-depth characterization of one of these monoclonal, polyreactive natural antibodies, the IgM clone 9H4, revealed its ability to recognize the intermediate filament vimentin. By using 9H4, we observed that senescent primary human fibroblasts express vimentin on their cell surface, and MS analysis revealed a posttranslational modification on cysteine 328 (C328) by the oxidative adduct malondialdehyde (MDA). Moreover, elevated levels of secreted MDA-modified vimentin were detected in the plasma of aged senescence-accelerated mouse prone 8 mice, which are known to have deregulated reactive oxygen species metabolism and accelerated aging. Based on these findings, we hypothesize that humoral innate immunity may recognize senescent cells by the presence of membrane-bound MDA-vimentin, presumably as part of a senescence eradication mechanism that may become impaired with age and result in senescent cell accumulation.
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Superficial vimentin mediates DENV-2 infection of vascular endothelial cells. Sci Rep 2016; 6:38372. [PMID: 27910934 PMCID: PMC5133558 DOI: 10.1038/srep38372] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 11/08/2016] [Indexed: 11/25/2022] Open
Abstract
Damage to vascular endothelial cells (VECs) is a critical hallmark of hemorrhagic diseases caused by dengue virus (DENV). However, the precise molecular event involved in DENV binding and infection of VECs has yet to be clarified. In this study, vimentin (55 kDa) was identified to be involved in DENV-2 adsorption into VECs. This protein is located on the surface of VECs and interacts with DENV-2 envelope protein domain III (EDIII). The expression level of the superficial vimentin on VECs was not affected by viral infection or siRNA interference, indicating that the protein exists in a particular mode. Furthermore, the rod domain of the vimentin protein mainly functions in DENV-2 adsorption into VECs. Molecular docking results predicted several residues in vimentin rod and DENV EDIII; these residues may be responsible for cell–virus interactions. We propose that the superficial vimentin could be a novel molecule involved in DENV binding and infection of VECs. DENV EDIII directly interacts with the rod domain of vimentin on the VEC surface and thus mediates the infection.
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61
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Adolf A, Leondaritis G, Rohrbeck A, Eickholt BJ, Just I, Ahnert-Hilger G, Höltje M. The intermediate filament protein vimentin is essential for axonotrophic effects of Clostridium botulinum C3 exoenzyme. J Neurochem 2016; 139:234-244. [PMID: 27419376 DOI: 10.1111/jnc.13739] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 06/24/2016] [Accepted: 07/12/2016] [Indexed: 01/01/2023]
Abstract
The type III intermediate filament protein vimentin was recently identified to mediate binding and uptake of Clostridium botulinum C3 exoenzyme (C3bot) in two cell lines. Here, we used primary neuronal cultures from vimentin knockout (Vim-/- ) mice to study the impact of vimentin on axonal growth and internalization of C3bot. In contrast to wild type, vimentin knockout neurons were insensitive to C3bot. Application of extracellular vimentin to Vim-/- neurons completely restored the growth-promoting effects of C3bot. In line with this uptake of C3bot into Vim-/- neurons was strongly decreased resulting in reduced ADP-ribosylation of RhoA and B as detected by an antibody recognizing selectively ADP-ribosylated RhoA/B. Again, uptake of C3bot into Vim-/- neurons was rescued by addition of extracellular vimentin. In addition, in purified embryonic stem cell-derived motor neurons that are devoid of glial cells C3bot elicited axonotrophic effects confining neuronal vimentin as a binding partner. Primary neuronal cultures from vimentin knockout (KO) mice were used to study the impact of vimentin on axonal growth and internalization of C3bot. In contrast to wild type, vimentin knockout neurons were insensitive to the axonotrophic effects of C3bot. Application of extracellular vimentin (recombinant vimentin) to vimentin KO neurons completely restored the growth-promoting effects of C3bot. In line with this uptake of C3bot into vimentin KO neurons was strongly decreased resulting in reduced ADP-ribosylation of RhoA and B as detected by an antibody recognizing selectively ADP-ribosylated RhoA/B.
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Affiliation(s)
- Andrej Adolf
- Institute of Integrative Neuroanatomy, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - George Leondaritis
- Department of Pharmacology, Medical School, University of Ioannina, Ioannina, Greece
| | - Astrid Rohrbeck
- Institute of Toxicology, Hannover Medical School (MHH), Hannover, Germany
| | - Britta Johanna Eickholt
- Institute of Biochemistry & Neuro Cure Cluster of Excellence, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Ingo Just
- Institute of Toxicology, Hannover Medical School (MHH), Hannover, Germany
| | - Gudrun Ahnert-Hilger
- Institute of Integrative Neuroanatomy, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Markus Höltje
- Institute of Integrative Neuroanatomy, Charité-Universitätsmedizin Berlin, Berlin, Germany.
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Schehr JL, Schultz ZD, Warrick JW, Guckenberger DJ, Pezzi HM, Sperger JM, Heninger E, Saeed A, Leal T, Mattox K, Traynor AM, Campbell TC, Berry SM, Beebe DJ, Lang JM. High Specificity in Circulating Tumor Cell Identification Is Required for Accurate Evaluation of Programmed Death-Ligand 1. PLoS One 2016; 11:e0159397. [PMID: 27459545 PMCID: PMC4961410 DOI: 10.1371/journal.pone.0159397] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 07/02/2016] [Indexed: 12/26/2022] Open
Abstract
Background Expression of programmed-death ligand 1 (PD-L1) in non-small cell lung cancer (NSCLC) is typically evaluated through invasive biopsies; however, recent advances in the identification of circulating tumor cells (CTCs) may be a less invasive method to assay tumor cells for these purposes. These liquid biopsies rely on accurate identification of CTCs from the diverse populations in the blood, where some tumor cells share characteristics with normal blood cells. While many blood cells can be excluded by their high expression of CD45, neutrophils and other immature myeloid subsets have low to absent expression of CD45 and also express PD-L1. Furthermore, cytokeratin is typically used to identify CTCs, but neutrophils may stain non-specifically for intracellular antibodies, including cytokeratin, thus preventing accurate evaluation of PD-L1 expression on tumor cells. This holds even greater significance when evaluating PD-L1 in epithelial cell adhesion molecule (EpCAM) positive and EpCAM negative CTCs (as in epithelial-mesenchymal transition (EMT)). Methods To evaluate the impact of CTC misidentification on PD-L1 evaluation, we utilized CD11b to identify myeloid cells. CTCs were isolated from patients with metastatic NSCLC using EpCAM, MUC1 or Vimentin capture antibodies and exclusion-based sample preparation (ESP) technology. Results Large populations of CD11b+CD45lo cells were identified in buffy coats and stained non-specifically for intracellular antibodies including cytokeratin. The amount of CD11b+ cells misidentified as CTCs varied among patients; accounting for 33–100% of traditionally identified CTCs. Cells captured with vimentin had a higher frequency of CD11b+ cells at 41%, compared to 20% and 18% with MUC1 or EpCAM, respectively. Cells misidentified as CTCs ultimately skewed PD-L1 expression to varying degrees across patient samples. Conclusions Interfering myeloid populations can be differentiated from true CTCs with additional staining criteria, thus improving the specificity of CTC identification and the accuracy of biomarker evaluation.
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Affiliation(s)
- Jennifer L. Schehr
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Zachery D. Schultz
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Jay W. Warrick
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - David J. Guckenberger
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Hannah M. Pezzi
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Jamie M. Sperger
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Erika Heninger
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Anwaar Saeed
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Ticiana Leal
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Kara Mattox
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Anne M. Traynor
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Toby C. Campbell
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Scott M. Berry
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - David J. Beebe
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Joshua M. Lang
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- * E-mail:
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Identification of Vimentin as a Potential Therapeutic Target against HIV Infection. Viruses 2016; 8:v8060098. [PMID: 27314381 PMCID: PMC4926169 DOI: 10.3390/v8060098] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 04/01/2016] [Accepted: 04/06/2016] [Indexed: 12/22/2022] Open
Abstract
A combination of antiviral drugs known as antiretroviral therapy (ART) has shown effectiveness against the human immunodeficiency virus (HIV). ART has markedly decreased mortality and morbidity among HIV-infected patients, having even reduced HIV transmission. However, an important current disadvantage, resistance development, remains to be solved. Hope is focused on developing drugs against cellular targets. This strategy is expected to prevent the emergence of viral resistance. In this study, using a comparative proteomic approach in MT4 cells treated with an anti-HIV leukocyte extract, we identified vimentin, a molecule forming intermediate filaments in the cell, as a possible target against HIV infection. We demonstrated a strong reduction of an HIV-1 based lentivirus expressing the enhanced green fluorescent protein (eGFP) in vimentin knockdown cells, and a noteworthy decrease of HIV-1 capsid protein antigen (CAp24) in those cells using a multiround infectivity assay. Electron micrographs showed changes in the structure of intermediate filaments when MT4 cells were treated with an anti-HIV leukocyte extract. Changes in the structure of intermediate filaments were also observed in vimentin knockdown MT4 cells. A synthetic peptide derived from a cytoskeleton protein showed potent inhibitory activity on HIV-1 infection, and low cytotoxicity. Our data suggest that vimentin can be a suitable target to inhibit HIV-1.
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Abstract
Hutchinson-Gilford progeria syndrome (HGPS) is an extremely rare premature aging disease presenting many features resembling the normal aging process. HGPS patients die before the age of 20 years due to cardiovascular problems and heart failure. HGPS is linked to mutations in the LMNA gene encoding the intermediate filament protein lamin A. Lamin A is a major component of the nuclear lamina, a scaffold structure at the nuclear envelope that defines mechanochemical properties of the nucleus and is involved in chromatin organization and epigenetic regulation. Lamin A is also present in the nuclear interior where it fulfills lamina-independent functions in cell signaling and gene regulation. The most common LMNA mutation linked to HGPS leads to mis-splicing of the LMNA mRNA and produces a mutant lamin A protein called progerin that tightly associates with the inner nuclear membrane and affects the dynamic properties of lamins. Progerin expression impairs many important cellular processes providing insight into potential disease mechanisms. These include changes in mechanosignaling, altered chromatin organization and impaired genome stability, and changes in signaling pathways, leading to impaired regulation of adult stem cells, defective extracellular matrix production and premature cell senescence. In this review, we discuss these pathways and their potential contribution to the disease pathologies as well as therapeutic approaches used in preclinical and clinical tests.
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Affiliation(s)
- Sandra Vidak
- Max F. Perutz Laboratories (MFPL), Department of Medical Biochemistry, Vienna Biocenter (VBC), Medical University Vienna, Dr. Bohr-Gasse 9/3, 1030, Vienna, Austria
| | - Roland Foisner
- Max F. Perutz Laboratories (MFPL), Department of Medical Biochemistry, Vienna Biocenter (VBC), Medical University Vienna, Dr. Bohr-Gasse 9/3, 1030, Vienna, Austria.
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Gold nanoparticles induce apoptosis, endoplasmic reticulum stress events and cleavage of cytoskeletal proteins in human neutrophils. Toxicol In Vitro 2016; 31:12-22. [DOI: 10.1016/j.tiv.2015.11.003] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 09/09/2015] [Accepted: 11/06/2015] [Indexed: 11/17/2022]
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Cui X, Zhang L, Magli AR, Catera R, Yan XJ, Griffin DO, Rothstein TL, Barrientos J, Kolitz JE, Allen SL, Rai KR, Chiorazzi N, Chu CC. Cytoplasmic myosin-exposed apoptotic cells appear with caspase-3 activation and enhance CLL cell viability. Leukemia 2016; 30:74-85. [PMID: 26220042 PMCID: PMC4703467 DOI: 10.1038/leu.2015.204] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 07/20/2015] [Accepted: 07/22/2015] [Indexed: 12/18/2022]
Abstract
The degree of chronic lymphocytic leukemia (CLL) B-cell antigen receptor (BCR) binding to myosin-exposed apoptotic cells (MEACs) correlates with worse patient outcomes, suggesting a link to disease activity. Therefore, we studied MEAC formation and the effects of MEAC binding on CLL cells. In cell line studies, both intrinsic (spontaneous or camptothecin-induced) and extrinsic (FasL- or anti-Fas-induced) apoptosis created a high percent of MEACs over time in a process associated with caspase-3 activation, leading to cytoplasmic myosin cleavage and trafficking to cell membranes. The involvement of common apoptosis pathways suggests that most cells can produce MEACs and indeed CLL cells themselves form MEACs. Consistent with the idea that MEAC formation may be a signal to remove dying cells, we found that natural IgM antibodies bind to MEACs. Functionally, co-culture of MEACs with CLL cells, regardless of immunoglobulin heavy-chain variable region gene mutation status, improved leukemic cell viability. Based on inhibitor studies, this improved viability involved BCR signaling molecules. These results support the hypothesis that stimulation of CLL cells with antigen, such as those on MEACs, promotes CLL cell viability, which in turn could lead to progression to worse disease.
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Affiliation(s)
- Xiaoxuan Cui
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY 11030
| | - Lu Zhang
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY 11030
| | - Amanda R. Magli
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY 11030
| | - Rosa Catera
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY 11030
| | - Xiao-Jie Yan
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY 11030
| | - Daniel O. Griffin
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY 11030
| | - Thomas L. Rothstein
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY 11030
- Department of Medicine, Hofstra North Shore-LIJ School of Medicine, Hempstead, NY, 11549
- Department of Molecular Medicine, Hofstra North Shore-LIJ School of Medicine, Hempstead, NY, 11549
| | - Jacqueline Barrientos
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY 11030
- Department of Medicine, North Shore University Hospital and Long Island Jewish Medical Center, North Shore-LIJ Health System, Manhasset, NY 11030 and New Hyde Park, NY 11040
- Department of Medicine, Hofstra North Shore-LIJ School of Medicine, Hempstead, NY, 11549
| | - Jonathan E. Kolitz
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY 11030
- Department of Medicine, North Shore University Hospital and Long Island Jewish Medical Center, North Shore-LIJ Health System, Manhasset, NY 11030 and New Hyde Park, NY 11040
- Department of Medicine, Hofstra North Shore-LIJ School of Medicine, Hempstead, NY, 11549
| | - Steven L. Allen
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY 11030
- Department of Medicine, North Shore University Hospital and Long Island Jewish Medical Center, North Shore-LIJ Health System, Manhasset, NY 11030 and New Hyde Park, NY 11040
- Department of Medicine, Hofstra North Shore-LIJ School of Medicine, Hempstead, NY, 11549
| | - Kanti R. Rai
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY 11030
- Department of Medicine, North Shore University Hospital and Long Island Jewish Medical Center, North Shore-LIJ Health System, Manhasset, NY 11030 and New Hyde Park, NY 11040
- Department of Medicine, Hofstra North Shore-LIJ School of Medicine, Hempstead, NY, 11549
| | - Nicholas Chiorazzi
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY 11030
- Department of Medicine, North Shore University Hospital and Long Island Jewish Medical Center, North Shore-LIJ Health System, Manhasset, NY 11030 and New Hyde Park, NY 11040
- Department of Molecular Medicine, Hofstra North Shore-LIJ School of Medicine, Hempstead, NY, 11549
| | - Charles C. Chu
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY 11030
- Department of Medicine, North Shore University Hospital and Long Island Jewish Medical Center, North Shore-LIJ Health System, Manhasset, NY 11030 and New Hyde Park, NY 11040
- Department of Medicine, Hofstra North Shore-LIJ School of Medicine, Hempstead, NY, 11549
- Department of Molecular Medicine, Hofstra North Shore-LIJ School of Medicine, Hempstead, NY, 11549
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Vallières F, Simard JC, Stafford-Richard T, Girard D. Prolonged cultures of unstimulated human neutrophils lead to the apparition and persistence of rest-in-plate structures (RIPs) recognized by professional phagocytes in vitro and in vivo. Int J Biochem Cell Biol 2015; 69:62-9. [PMID: 26475019 DOI: 10.1016/j.biocel.2015.10.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 10/09/2015] [Accepted: 10/10/2015] [Indexed: 01/13/2023]
Abstract
Polymorphonuclear neutrophil cells (PMNs) are known to spontaneously undergo apoptosis and then eliminated by professional phagocytes to prevent inflammation, a process called efferocytosis. However, when efferocytosis is impaired, PMNs will fall into secondary necrosis. Whether this state can persist for a certain period of time is unclear, since most of the studies investigating secondary necrosis are performed within 24h following induction by a proapoptotic agent. In this study, freshly isolated human PMNs were incubated without addition of exogenous agents in order to force them to undergo apoptosis and then secondary necrosis, an ideal experimental condition to study the behavior of secondary necrotic PMNs in absence of efferocytosis. By monitoring PMN cell morphology over time, we observed that an increasing proportion of cells harbored a ghost-like phenotype. Because these cellular remnants persist in plates for several days, we introduce here the terminology RIPs for 'rest-in-plate' structure. Heating of freshly isolated PMNs for 5min did not lead to the apparition of RIPs over time. In vivo administration of 7-days old RIPs in the murine air pouch model induced a slight inflammation resorbed within 24h. PKH26-stained RIPs were found to be ingested by professional phagocytes in vitro and in vivo in the murine air pouch and peritonitis models. Therefore, aged-PMNs have the potential to become RIPs in absence of efficient efferocytosis. Fortunately RIPs are recognized by professional phagocytes and, therefore, the concept of resolution of inflammation based on elimination of apoptotic and secondary necrotic PMNs could also be applied to RIPs.
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Affiliation(s)
- Francis Vallières
- Laboratoire de Recherche en Inflammation et Physiologie des Granulocytes, Université du Québec, INRS-Institut Armand-Frappier, Laval, Québec, Canada
| | - Jean-Christophe Simard
- Laboratoire de Recherche en Inflammation et Physiologie des Granulocytes, Université du Québec, INRS-Institut Armand-Frappier, Laval, Québec, Canada
| | - Théo Stafford-Richard
- Laboratoire de Recherche en Inflammation et Physiologie des Granulocytes, Université du Québec, INRS-Institut Armand-Frappier, Laval, Québec, Canada
| | - Denis Girard
- Laboratoire de Recherche en Inflammation et Physiologie des Granulocytes, Université du Québec, INRS-Institut Armand-Frappier, Laval, Québec, Canada.
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Altered Traffic of Cardiolipin during Apoptosis: Exposure on the Cell Surface as a Trigger for "Antiphospholipid Antibodies". J Immunol Res 2015; 2015:847985. [PMID: 26491702 PMCID: PMC4603604 DOI: 10.1155/2015/847985] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 09/06/2015] [Indexed: 02/07/2023] Open
Abstract
Apoptosis has been reported to induce changes in the remodelling of membrane lipids; after death receptor engagement, specific changes of lipid composition occur not only at the plasma membrane, but also in intracellular membranes. This paper focuses on one important aspect of apoptotic changes in cellular lipids, namely, the redistribution of the mitochondria-specific phospholipid, cardiolipin (CL). CL predominantly resides in the inner mitochondrial membrane, even if the rapid remodelling of its acyl chains and the subsequent degradation occur in other membrane organelles. After death receptor stimulation, CL appears to concentrate into mitochondrial “raft-like” microdomains at contact sites between inner and outer mitochondrial membranes, leading to local oligomerization of proapoptotic proteins, including Bid. Clustering of Bid in CL-enriched contacts sites is interconnected with pathways of CL remodelling that intersect membrane traffic routes dependent upon actin. In addition, CL association with cytoskeleton protein vimentin was observed. Such novel association also indicated that CL molecules may be expressed at the cell surface following apoptotic stimuli. This observation adds a novel implication of biomedical relevance. The association of CL with vimentin at the cell surface may represent a “new” target antigen in the context of the apoptotic origin of anti-vimentin/CL autoantibodies in Antiphospholipid Syndrome.
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Liz R, Simard JC, Leonardi LBA, Girard D. Silver nanoparticles rapidly induce atypical human neutrophil cell death by a process involving inflammatory caspases and reactive oxygen species and induce neutrophil extracellular traps release upon cell adhesion. Int Immunopharmacol 2015; 28:616-25. [PMID: 26241783 DOI: 10.1016/j.intimp.2015.06.030] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 06/09/2015] [Accepted: 06/24/2015] [Indexed: 01/19/2023]
Abstract
Inflammation is one of the major toxic effects reported in response to in vitro or in vivo nanoparticle (NP) exposure. Among engineered NPs, silver nanoparticles (AgNPs) are very attractive for the development of therapeutic strategies, especially because of their antimicrobial properties. In humans, neutrophils, key players in inflammation, are the most abundant blood leukocytes that spontaneously undergo apoptosis, a central cell death mechanism regulating inflammation. The aim of this study was to evaluate the effect of AgNPs on neutrophil apoptosis. Transmission electronic microscopy reveals that AgNPs rapidly penetrate inside neutrophils. AgNPs induced atypical cell death where the cell volume increased and the cell surface expression of CD16 remained unaltered unlike apoptotic neutrophils where cell shrinkage and loss of CD16 are typically observed. The AgNP-induced atypical cell death is distinct from necrosis and reversed by a pancaspase inhibitor or by inhibitors of the inflammatory caspase-1 and caspase-4. In addition, AgNPs induced IL-1β production inhibited by caspase-1 and caspase-4 inhibitors and also induced caspase-1 activity. Reactive oxygen species (ROS) production was increased by AgNPs and the atypical cell death was inhibited by the antioxidant n-acetylcysteine. Under similar experimental conditions, adhesion of neutrophils leads to neutrophil extracellular trap (NET) release induced by AgNPs. However, this process was not reversed by caspase inhibitors. We conclude that AgNPs rapidly induced an atypical cell death in neutrophils by a mechanism involving caspase-1, -4 and ROS. However, in adherent neutrophils, AgNPs induced NET release and, therefore, are novel agents able to trigger NET release.
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Affiliation(s)
- Rafael Liz
- Laboratoire de recherche en inflammation et physiologie des granulocytes, INRS-Institut Armand-Frappier, Université du Québec, Laval, QC H7V 1B7, Canada
| | - Jean-Christophe Simard
- Laboratoire de recherche en inflammation et physiologie des granulocytes, INRS-Institut Armand-Frappier, Université du Québec, Laval, QC H7V 1B7, Canada
| | - Laurien Bruna Araújo Leonardi
- Laboratoire de recherche en inflammation et physiologie des granulocytes, INRS-Institut Armand-Frappier, Université du Québec, Laval, QC H7V 1B7, Canada
| | - Denis Girard
- Laboratoire de recherche en inflammation et physiologie des granulocytes, INRS-Institut Armand-Frappier, Université du Québec, Laval, QC H7V 1B7, Canada.
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Dave JM, Bayless KJ. Vimentin as an integral regulator of cell adhesion and endothelial sprouting. Microcirculation 2015; 21:333-44. [PMID: 24387004 DOI: 10.1111/micc.12111] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 12/30/2013] [Indexed: 12/11/2022]
Abstract
Angiogenesis is a multistep process that requires intricate changes in cell shape to generate new blood vessels. IF are a large family of proteins that play an important structural and functional role in forming and regulating the cytoskeleton. Vimentin, a major type III intermediate filament protein is expressed in endothelial and other mesenchymal cells. The structure of vimentin is conserved in mammals and shows dynamic expression profiles in various cell types and different developmental stages. Although initial studies with vimentin-deficient mice demonstrated a virtually normal phenotype, subsequent studies have revealed several defects in cell attachment, migration, signaling, neurite extension, and vascularization. Regulation of vimentin is highly complex and is driven by posttranslational modifications such as phosphorylation and cleavage by intracellular proteases. This review discusses various novel functions which are now known to be mediated by vimentin, summarizing structure, regulation and roles of vimentin in cell adhesion, migration, angiogenesis, neurite extension, and cancer. We specifically highlight a pathway involving growth factor-mediated calpain activation, vimentin cleavage, and MT1-MMP membrane translocation that is required for endothelial cell invasion in 3D environments. This pathway may also regulate the analogous processes of neurite extension and tumor cell invasion.
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Affiliation(s)
- Jui M Dave
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
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Changes in regulation of human monocyte proteins in response to IgG from patients with antiphospholipid syndrome. Blood 2014; 124:3808-16. [PMID: 25301710 DOI: 10.1182/blood-2014-05-577569] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The effects of immunoglobulin G (IgG) from patients with the antiphospholipid syndrome (APS) upon monocyte activation have not been fully characterized. We carried out a comprehensive proteomic analysis of human monocytes treated with IgG from patients with different manifestations of the APS. Using 2-dimensional differential gel electrophoresis (2D DiGE), 4 of the most significantly regulated proteins (vimentin [VIM], zinc finger CCH domain-containing protein 18, CAP Gly domain-containing linker protein 2, and myeloperoxidase) were differentially regulated in monocytes treated with thrombotic or obstetric APS IgG, compared with healthy control (HC) IgG. These findings were confirmed by comparing monocytes isolated from APS patients and HC. Anti-VIM antibodies (AVAs) were significantly increased in 11 of 27 patients (40.7%) with APS. VIM expression on HC monocytes was stimulated more strongly by APS IgG from patients with higher-avidity serum AVA. We further characterized the proteome of thrombotic APS IgG-treated monocytes using a label-free proteomics technique. Of 12 proteins identified with the most confidence, 2 overlapped with 2D DiGE and many possessed immune response, cytoskeletal, coagulation, and signal transduction functions which are all relevant to APS and may therefore provide potential new therapeutic targets of this disease.
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Abstract
BACKGROUND The role of non-HLA antibodies in rejection is not clear. We investigate whether antibodies to vimentin are made after renal transplantation and if production is associated with interstitial fibrosis and tubular atrophy (IFTA). METHODS In this retrospective study, sera from 70 recipients of renal allografts (40 controls, 30 IFTA) were studied. The biopsy diagnosis of interstitial fibrosis and tubular atrophy (IFTA) was based on random, cause-indicating biopsies. Sera were collected pretransplant and at 3 monthly intervals up to 5 years posttransplant or diagnosis of IFTA and assayed by ELISA for IgM and IgG anti-vimentin antibodies (AVA) and HLA antibodies. RESULTS Mean titers of IgM AVA were higher at every year after transplantation compared with pretransplant for both IFTA and controls groups (P<0.001). There was no difference in the mean level of IgM AVA achieved by IFTA and control groups. The mean pretransplant levels of IgG AVA in the IFTA and control group were 18.2±11.7 and 11.0±8.1, respectively (P=0.001). There was a significant increase between the pretransplant mean levels of IgG AVA and the levels at years 1 to 4 in the IFTA group (years 1-3, P<0.0001, year 4 P=0.003) but not in the controls. There was no significant difference between the numbers of IFTA or control patients achieving a positive value (mean+2SD of pretransplant antibody titers) of IgM AVA (50% versus 37.5%, respectively) or IgG AVA (26.6% versus 12.5%, respectively). There was no association between production of HLA and AVA antibodies. CONCLUSION Posttransplant production of IgM AVA is not associated with IFTA. The production of IgG AVA by a minority of IFTA patients suggests that in some individuals, IgG AVA may be involved in the pathology of IFTA.
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Rohrbeck A, Schröder A, Hagemann S, Pich A, Höltje M, Ahnert-Hilger G, Just I. Vimentin mediates uptake of C3 exoenzyme. PLoS One 2014; 9:e101071. [PMID: 24967582 PMCID: PMC4072758 DOI: 10.1371/journal.pone.0101071] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 06/03/2014] [Indexed: 02/02/2023] Open
Abstract
Clostridium botulinum C3 exoenzyme (C3) selectively inactivates RhoA/B/C GTPases by ADP-ribosylation. Based on this substrate specificity C3 is a well-established tool in cell biology. C3 is taken up by eukaryotic cells although lacking an uptake and translocation domain. Based on different approaches vimentin was identified as membranous C3-interaction partner by mass spectrometry. Vimentin in fact was partly localized at the outer surface of hippocampal HT22 cells and J744A.1 macrophages. Domain analysis identified the rod domain as binding partner of C3. Vimentin was also involved in uptake of C3 as shown by knock down of vimentin in HT22 and J774A.1 cells. The involvement of vimentin in uptake of C3 was further supported by the findings that the vimentin disruptor acrylamide blocked uptake of C3. Vimentin is not only a major organizing element of the intermediate filament network but is also involved in both binding and uptake of C3 exoenzyme.
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Affiliation(s)
- Astrid Rohrbeck
- Institute of Toxicology, Hannover Medical School, Charité-Universitätsmedizin Berlin, Germany
- * E-mail:
| | - Anke Schröder
- Institute of Toxicology, Hannover Medical School, Charité-Universitätsmedizin Berlin, Germany
| | - Sandra Hagemann
- Institute of Toxicology, Hannover Medical School, Charité-Universitätsmedizin Berlin, Germany
| | - Andreas Pich
- Institute of Toxicology, Hannover Medical School, Charité-Universitätsmedizin Berlin, Germany
| | - Markus Höltje
- Center for Anatomy, Functional Cell Biology, Charité-Universitätsmedizin Berlin, Germany
| | - Gudrun Ahnert-Hilger
- Center for Anatomy, Functional Cell Biology, Charité-Universitätsmedizin Berlin, Germany
| | - Ingo Just
- Institute of Toxicology, Hannover Medical School, Charité-Universitätsmedizin Berlin, Germany
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74
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Klein B, Lütz-Meindl U, Kerschbaum HH. From the nucleus to the plasma membrane: translocation of the nuclear proteins histone H3 and lamin B1 in apoptotic microglia. Apoptosis 2014; 19:759-75. [PMID: 24558118 DOI: 10.1007/s10495-014-0970-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Nuclear autoantibodies have been found in patients with autoimmune diseases. One possible source for nuclear antigens are apoptotic cells. However, the mechanism of how apoptotic cells make nuclear factors accessible to the immune system is still elusive. In the present study, we investigated the redistribution of nuclear components after UV irradiation in the microglial cell line BV-2 and in primary mouse microglia at the ultrastructural level. We used transmission electron microscopy-coupled electron energy loss spectroscopy (EELS) to measure phosphorus as an indicator for nucleic acids and immunogold labeling to detect histone H3 and lamin B1 in apoptotic cells. EELS revealed elevated concentrations of phosphorus in nuclear and cytoplasmic condensed chromatin compared to the remaining cytoplasm. Furthermore, immunolabeling of lamin B1 and histone H3 was detected in apoptotic microglia not only in the nucleus, but also in the cytoplasm, and even at the plasma membrane. Confocal images of apoptotic microglia, which were not previously permeabilized, showed patches of histone H3 and lamin B1 labeling at the cell surface. The pan-caspase inhibitor Z-VAD-FMK (carbobenzoxy-valyl-alanyl-aspartyl-[O-methyl]-fluoromethylketone) prevented the occurrence of cytoplasmic condensed chromatin in apoptotic microglia. Our findings indicate that nuclear components leak from the nucleus into the cytoplasm in apoptotic microglia. At least histone H3 and lamin B1 reach the cell surface, this may promote autoreactive processes.
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Affiliation(s)
- Barbara Klein
- Department of Cell Biology, University of Salzburg, Hellbrunnerstraße 34, 5020, Salzburg, Austria,
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75
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Fhied C, Kanangat S, Borgia JA. Development of a bead-based immunoassay to routinely measure vimentin autoantibodies in the clinical setting. J Immunol Methods 2014; 407:9-14. [DOI: 10.1016/j.jim.2014.03.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 03/12/2014] [Accepted: 03/13/2014] [Indexed: 10/25/2022]
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76
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Hsu PC, Liao YF, Lin CL, Lin WH, Liu GY, Hung HC. Vimentin is involved in peptidylarginine deiminase 2-induced apoptosis of activated Jurkat cells. Mol Cells 2014; 37:426-34. [PMID: 24850148 PMCID: PMC4044315 DOI: 10.14348/molcells.2014.2359] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Revised: 04/20/2014] [Accepted: 04/21/2014] [Indexed: 01/27/2023] Open
Abstract
Peptidylarginine deiminase type 2 (PADI2) deiminates (or citrullinates) arginine residues in protein to citrulline residues in a Ca2+-dependent manner, and is found in lymphocytes and macrophages. Vimentin is an intermediate filament protein and a well-known substrate of PADI2. Citrullinated vimentin is found in ionomycin-induced macrophage apoptosis. Citrullinated vimentin is the target of anti-Sa antibodies, which are specific to rheumatoid arthritis, and play a critical role in the pathogenesis of the disease. To investigate the role of PADI2 in apoptosis, we generated a Jurkat cell line that overexpressed the PADI2 transgene from a tetracycline-inducible promoter, and used a combination of 12-O-tetradecanoylphorbol-13-acetate and ionomycin to activate Jurkat cells. We found that PADI2 overexpression reduced the cell viability of activated Jurkat cells in1a dose- and time-dependent manner. The PADI2-overexpressed and -activated Jurkat cells presented typical manifestations of apoptosis, and exhibited greater levels of citrullinated proteins, including citrullinated vimentin. Vimentin overexpression rescued a portion of the cells from apoptosis. In conclusion, PADI2 overexpression induces apoptosis in activated Jurkat cells. Vimentin is involved in PADI2-induced apoptosis. Moreover, PADI2-overexpressed Jurkat cells secreted greater levels of vimentin after activation, and expressed more vimentin on their cell surfaces when undergoing apoptosis. Through artificially highlighting PADI2 and vimentin, we demonstrated that PADI2 and vimentin participate in the apoptotic mechanisms of activated T lymphocytes. The secretion and surface expression of vimentin are possible ways of autoantigen presentation to the immune system.
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Affiliation(s)
- Pei-Chen Hsu
- Department of Life Sciences and Institute of Genomics and Bioinformatics, National Chung-Hsing University, and Agricultural Biotechnology Center (ABC), National Chung Hsing University, Taiwan,
Republic of China
- Department of Medicine, Da-Chien General Hospital, Taiwan,
Republic of China
| | - Ya-Fan Liao
- Department of Applied Chemistry, Chaoyang University of Technology, Taiwan,
Republic of China
| | - Chin-Li Lin
- Institute of Medicine, Chung Shan Medical University
| | - Wen-Hao Lin
- Department of Life Sciences and Institute of Genomics and Bioinformatics, National Chung-Hsing University, and Agricultural Biotechnology Center (ABC), National Chung Hsing University, Taiwan,
Republic of China
| | - Guang-Yaw Liu
- Institute of Microbiology and Immunology, Chung Shan Medical University, and Division of Allergy, Immunology, and Rheumatology, Chung Shan Medical University Hospital, Taiwan,
Republic of China
| | - Hui-Chih Hung
- Department of Life Sciences and Institute of Genomics and Bioinformatics, National Chung-Hsing University, and Agricultural Biotechnology Center (ABC), National Chung Hsing University, Taiwan,
Republic of China
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El Shazly RI, Hussein SA, Raslan HZ, Elgogary AA. Anti-mutated citrullinated vimentin antibodies in rheumatoid arthritis patients: Relation to disease activity and manifestations. EGYPTIAN RHEUMATOLOGIST 2014. [DOI: 10.1016/j.ejr.2013.12.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dhanwani R, Khan M, Lomash V, Rao PVL, Ly H, Parida M. Characterization of chikungunya virus induced host response in a mouse model of viral myositis. PLoS One 2014; 9:e92813. [PMID: 24667237 PMCID: PMC3965460 DOI: 10.1371/journal.pone.0092813] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2013] [Accepted: 02/25/2014] [Indexed: 11/30/2022] Open
Abstract
While a number of studies have documented the persistent presence of chikungunya virus (CHIKV) in muscle tissue with primary fibroblast as the preferable cell target, little is known regarding the alterations that take place in muscle tissue in response to CHIKV infection. Hence, in the present study a permissive mouse model of CHIKV infection was established and characterized in order to understand the pathophysiology of the disease. The two dimensional electrophoresis of muscle proteome performed for differential analysis indicated a drastic reprogramming of the proteins from various classes like stress, inflammation, cytoskeletal, energy and lipid metabolism. The roles of the affected proteins were explained in relation to virus induced myopathy which was further supported by the histopathological and behavioural experiments proving the lack of hind limb coordination and other loco-motor abnormalities in the infected mice. Also, the level of various pro-inflammatory mediators like IL-6, MCP-1, Rantes and TNF-α was significantly elevated in muscles of infected mice. Altogether this comprehensive study of characterizing CHIKV induced mouse myopathy provides many potential targets for further evaluation and biomarker study.
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Affiliation(s)
- Rekha Dhanwani
- Department of Virology, Defence Research & Development Establishment (DRDE), Gwalior, India
| | - Mohsin Khan
- Department of Virology, Defence Research & Development Establishment (DRDE), Gwalior, India
| | - Vinay Lomash
- Department of Pharmacology and Toxicology, Defence Research & Development Establishment (DRDE), Gwalior, India
| | | | - Hinh Ly
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Twin Cities, Saint Paul, Minnestoa, United States of America
| | - Manmohan Parida
- Department of Virology, Defence Research & Development Establishment (DRDE), Gwalior, India
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Song M, San H, Anderson SA, Cannon RO, Orlic D. Shear stress-induced mechanotransduction protein deregulation and vasculopathy in a mouse model of progeria. Stem Cell Res Ther 2014; 5:41. [PMID: 24661531 PMCID: PMC4055145 DOI: 10.1186/scrt429] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Accepted: 03/14/2014] [Indexed: 01/24/2023] Open
Abstract
Introduction A mouse model of progeria derived by insertion of the human mutant LMNA gene (mLMNA), producing mutant lamin A, shows loss of smooth muscle cells in the media of the ascending aorta. We hypothesized that high shear stress, in the presence of mutant lamin A, induces this vasculopathy and tried to define the molecular and cellular basis for aortic vasculopathy. Methods Ascending and descending aortas from wild type (WT) and mLMNA+ mice were compared using proteomics, Western blots, PCR and immunostaining. To determine whether high fluidic shear stress, known to occur in the ascending aorta, contributed to the vasculopathy, we exposed descending aortas of mLMNA+ mice, with no apparent vasculopathy, to 75 dynes/cm2 shear stress for 30 minutes using a microfluidic system. Results When the mice were one year of age, expression of several mechanotransduction proteins in the ascending aorta, including vimentin, decreased in mLMNA+ mice but no decrease occurred in the descending aorta. High fluidic shear stress produced a significant reduction in vimentin of mLMNA+ mice but not in similarly treated WT mice. Conclusions The occurrence of mutant lamin A and high shear stress correlate with a reduction in the level of mechanotransduction proteins in smooth muscle cells of the media. Reduction of these proteins may contribute over time to development of vasculopathy in the ascending aorta in progeria syndrome.
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Platelet adhesion involves a novel interaction between vimentin and von Willebrand factor under high shear stress. Blood 2014; 123:2715-21. [PMID: 24642750 DOI: 10.1182/blood-2013-10-530428] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The interaction between platelet receptor glycoprotein Ibα and the A1 domain of von Willebrand factor (VWF) mediates tethering/translocation of platelets to sites of vascular injury. Unexpectedly, we observed platelets translocating over A1A2A3 domains protein slower than on A1 domain at high shear stress. This observation suggests an additional interaction between A domains and an adhesive receptor. We investigated vimentin because we have data showing the interaction of vimentin with the A2 domain of VWF. Moreover, vimentin is expressed on the platelet surface. This novel interaction was analyzed by using purified VWF, recombinant proteins, anti-vimentin antibodies, parallel flow chamber adhesion assays, flow cytometry, and vimentin-deficient murine platelets. The active form of VWF bound to vimentin, and the purified A2 domain blocked that binding. The interaction of a gain-of-function A1A2A3 mutant with platelet was reduced using anti-vimentin antibody. Platelet adhesion to wild-type (WT) A1A2A3 protein, collagen, and fibrin(ogen) was inhibited (32-75%) by anti-vimentin antibody under high shear stress. Compared with WT mice, platelets from vimentin-deficient mice had a reduced flow-dependent adhesion to both collagen and purified murine VWF. Last, the vimentin knockout mice had a prolonged tail bleeding time. The results describe that platelet vimentin engages VWF during platelet adhesion under high shear stress.
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81
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Butler GS, Overall CM. Matrix metalloproteinase processing of signaling molecules to regulate inflammation. Periodontol 2000 2013; 63:123-48. [DOI: 10.1111/prd.12035] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/19/2013] [Indexed: 12/12/2022]
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82
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Hugwil AV. The meaning of the anti-cancer antibody CLN-IgG (Pritumumab) generated by human × human hybridoma technology against the cyto-skeletal protein, vimentin, in the course of the treatment of malignancy. Med Hypotheses 2013; 81:489-95. [PMID: 23856243 DOI: 10.1016/j.mehy.2013.05.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Accepted: 05/26/2013] [Indexed: 12/13/2022]
Abstract
Cancer stem cells in a tumor mass form a very small subpopulation ranging from below 0.1% in a brain tumor but they have the crucial ability to become malignant. The goal of cancer therapy has been the total killing of tumor cells. However we should clarify that most of all tumor cells are differentiated cancer cells. Thus the elimination of 99.9% of tumor cells under histological criteria cannot ensure the cancer will be cured. Rather cancer cell biologists should turn their attention to reprogramming cancer stem cells to normal stem cells by which malignancy recuperates normal organogenesis from the aspect of the dichotomy of cancer stem cell. The cue points underlying the reverse cancer stem cell at blastogenesis in inflammation site is depending upon cell-to-cell recognition of the tumor-niche cells. Normalization of tumor-niche promises to lead cancer stem cell into normal stem cell owing to autonomous healing mechanisms that reside in the self-defense mechanisms in immunity and the cell competition mechanisms in the wound healing of the tissue cells. Among the cyto-skeletal proteins, vimentin becomes a target of self-restoration of cancer stem cell by means of immune surveillance. A human monoclonal antibody, CLN-IgG recognizes vimentin expressing on the cell surface of the malignant tumor. Since vimentin network resides in the cytoplasm connecting the plasma membrane with chromatin assembly in the nucleus, it is highly likely vimentin plays an important role in up-regulation and down-regulation through signal transduction between certain membrane receptors and gene expression with respect to the transformation of the cell. Aberrant arrangement of vimentin undergoes malignancy accompanied by epithelial-mesenchymal-transition relating to the aberrant apoptotic cellular behavior in the tumor-niche. Restraint of the aberrant expression of vimentin on the plasma membrane of the malignant cell evokes a pertinent signal transduction pathway for healing that is an indication there must be a reverse path that reprograms cancer stem cells to normal organogenesis.
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Affiliation(s)
- Albert V Hugwil
- HIHIMSA Foundation, 603 Seagaze Dr. Unit 949, Oceanside, CA 92054, USA.
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83
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Rose ML. Role of anti-vimentin antibodies in allograft rejection. Hum Immunol 2013; 74:1459-62. [PMID: 23777935 PMCID: PMC3820003 DOI: 10.1016/j.humimm.2013.06.006] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 05/10/2013] [Accepted: 06/07/2013] [Indexed: 11/27/2022]
Abstract
Production of anti-vimentin antibodies (AVA) after solid organ transplantation are common. Although classically thought to be expressed mainly within the cytosol, recent evidence demonstrates that extracellular or cell surface expression of vimentin is not unusual. This review examines the evidence to assess whether AVA contribute to allograft pathology. Clinical studies suggest that AVA are associated with cardiac allograft vasculopathy in heart transplant recipients. Studies in non-human primates confirm that production of AVA after renal and heart transplantation are not inhibited by Cyclosporine. Experimental studies have demonstrated that mice pre-immunised with vimentin undergo accelerated acute rejection and vascular intimal occlusion of cardiac allografts. Adoptive transfer of hyperimmune sera containing AVA into B-cell-knock-out mice caused accelerated rejection of allografted hearts, this is clear evidence that antibodies to vimentin accelerate rejection. AVA act in concert with the alloimmune response and AVA do not damage syngeneic or native heart allografts. Confocal microscopy of allografted organs in vimentin immunised mice shows extensive expression of vimentin on endothelial cells, apoptotic leukocytes and platelet/leukocyte conjugates, co-localising with C4d. One explanation for the ability of AVA to accelerate rejection would be fixation of complement within the graft and subsequent pro-inflammatory effects; there may also be interactions with platelets within the vasculature.
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Affiliation(s)
- Marlene L Rose
- National Heart and Lung Institute, Imperial College, Harefield Hospital, Harefield, Middlesex UB9 6JH, UK.
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Marco M, Fortin C, Fulop T. Membrane-type matrix metalloproteinases: key mediators of leukocyte function. J Leukoc Biol 2013; 94:237-46. [PMID: 23695309 DOI: 10.1189/jlb.0612267] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Leukocytes are major cellular effectors of the immune response. To accomplish this task, these cells display a vast arsenal of proteinases, among which, members of the MMP family are especially important. Leukocytes express several members of the MMP family, including secreted- and membrane-anchored MT- MMPs, which synergistically orchestrate an appropriate proteolytic reaction that ultimately modulates immunological responses. The MT-MMP subfamily comprises TM- and GPI-anchored proteinases, which are targeted to well-defined membrane microdomains and exhibit different substrate specificities. Whereas much information exists on the biological roles of secreted MMPs in leukocytes, the roles of MT-MMPs remain relatively obscure. This review summarizes the current knowledge on the expression of MT-MMPs in leukocyte and their contribution to the immune responses and to pathological conditions.
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Affiliation(s)
- Marta Marco
- Departamento de Bioquímica Clínica Facultad de Química, Gral. Flores 2124, Universidad de la República, Montevideo, Uruguay CP 11800.
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Thiagarajan PS, Yakubenko VP, Elsori DH, Yadav SP, Willard B, Tan CD, Rodriguez ER, Febbraio M, Cathcart MK. Vimentin is an endogenous ligand for the pattern recognition receptor Dectin-1. Cardiovasc Res 2013; 99:494-504. [PMID: 23674515 DOI: 10.1093/cvr/cvt117] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
AIMS Atherosclerosis is a chronic inflammatory disorder of cholesterol deposition in monocyte-derived macrophages (MDM) within the arterial wall leading to impingement on the lumen of the vessel. In atherosclerotic lesions, MDM are the primary source of NADPH oxidase-derived superoxide anion (O₂⁻) inducing low-density lipoprotein (LDL) oxidation leading to their unregulated uptake of oxidized LDL and foam cell formation. We recently discovered that zymosan potently activates monocyte NADPH oxidase via the non-toll pattern recognition receptor (PRR), Dectin-1. Other PRRs bind endogenous human ligands, yet no such ligands have been identified for Dectin-1. Our hypothesis was that inflammation generates endogenous ligands for Dectin-1 that activate O₂⁻ production and thereby contributes to atherogenesis. METHODS AND RESULTS Human: anti-zymosan antibodies were used to identify similar, cross-reactive epitopes in human atherosclerotic tissue extracts. Immunoblot analysis revealed consistent antibody reactive protein bands on one- and two-dimensional gel electrophoreses. Vimentin was identified by mass spectrometry in the immunoreactive bands across different tissue samples. Direct binding of vimentin to Dectin-1 was observed using BIACORE. Further data revealed that vimentin induces O₂⁻ production by human monocytes. Analysis of human atherosclerotic lesions revealed that vimentin was detected extracellularly in the necrotic core and in areas of active inflammation. Vimentin also co-localized with Dectin-1 in macrophage-rich regions where O₂⁻ is produced. CONCLUSION We conclude that vimentin is an endogenous, activating ligand for Dectin-1. Its presence in areas of artery wall inflammation and O₂⁻ production suggests that vimentin activates Dectin-1 and contributes to the oxidation of lipids and cholesterol accumulation in atherosclerosis.
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Affiliation(s)
- Praveena S Thiagarajan
- Department of Cellular and Molecular Medicine, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Ave, Cleveland, OH 44195, USA
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Cha SC, Qin H, Kannan S, Rawal S, Watkins LS, Baio FE, Wu W, Ong J, Wei J, Kwak B, Kim S, Popescu MS, Paick DS, Kim K, Luong A, Davis RE, Schroeder HW, Kwak LW, Neelapu SS. Nonstereotyped lymphoma B cell receptors recognize vimentin as a shared autoantigen. THE JOURNAL OF IMMUNOLOGY 2013; 190:4887-98. [PMID: 23536634 DOI: 10.4049/jimmunol.1300179] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Ag activation of the BCR may play a role in the pathogenesis of human follicular lymphoma (FL) and other B cell malignancies. However, the nature of the Ag(s) recognized by tumor BCRs has not been well studied. In this study, we used unbiased approaches to demonstrate that 42 (19.35%) of 217 tested FL Igs recognized vimentin as a shared autoantigen. The epitope was localized to the N-terminal region of vimentin for all vimentin-reactive tumor Igs. We confirmed specific binding to vimentin by using recombinant vimentin and by performing competitive inhibition studies. Furthermore, using indirect immunofluorescence staining, we showed that the vimentin-reactive tumor Igs colocalized with an anti-vimentin mAb in HEp-2 cells. The reactivity to N-terminal vimentin of IgG FL Igs was significantly higher than that of IgM FL Igs (30.4 versus 10%; p = 0.0022). However, vimentin-reactive FL Igs did not share CDR3 motifs and were not homologous. Vimentin was expressed in the T cell-rich regions of FL, suggesting that vimentin is available for binding with tumor BCRs within the tumor microenvironment. Vimentin was also frequently recognized by mantle cell lymphoma and multiple myeloma Igs. Our results demonstrate that vimentin is a shared autoantigen recognized by nonstereotyped FL BCRs and by the Igs of mantle cell lymphoma and multiple myeloma and suggest that vimentin may play a role in the pathogenesis of multiple B cell malignancies. These findings may lead to a better understanding of the biology and natural history of FL and other B cell malignancies.
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Affiliation(s)
- Soung-Chul Cha
- Division of Cancer Medicine, Department of Lymphoma and Myeloma, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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Nayfe R, Uthman I, Aoun J, Saad Aldin E, Merashli M, Khamashta MA. Seronegative antiphospholipid syndrome. Rheumatology (Oxford) 2013; 52:1358-67. [PMID: 23502076 DOI: 10.1093/rheumatology/ket126] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
APS is an autoimmune disease that leads to arterial and/or venous thrombosis, recurrent pregnancy loss and persistently positive aPLs. Patients with clinical manifestations highly suggestive of APS but persistently negative conventional aPLs are classified as having seronegative APS. Ongoing research has revealed the existence of non-criteria antibodies proposed to be relevant to APS and that can be potentially included in the disease's classification criteria. We present a literature review on the most promising antibodies of this heterogeneous aPL family, which includes antibodies to a zwitterionic phospholipid, namely phosphatidylethanolamine, phospholipid-binding plasma proteins, phospholipid-protein complexes and anionic phospholipids other than cardiolipin. Although these molecules can increase the diagnostic yield of APS, their clinical relevance is still debatable and needs to be confirmed by interlaboratory efforts toward standardizing diagnostic tools, in addition to experimental data and larger longitudinal studies.
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Affiliation(s)
- Rabih Nayfe
- Department of Internal Medicine, American University of Beirut Medical Center, PO Box 11-0236, Riad El-Solh, Beirut 1107 2020, Lebanon
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Simon M, Simard J, Girard D. Viscum album agglutinin-I (VAA-I) increases cell surface expression of cytoskeletal proteins in apoptotic human neutrophils. Hum Exp Toxicol 2012; 32:1097-106. [DOI: 10.1177/0960327112468910] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Viscum album agglutinin-I (VAA-I) is a plant lectin, which possesses anti-inflammatory properties, including the ability to induce neutrophil apoptosis by a mechanism that is not completely understood. Among the three actin-binding membrane-anchoring proteins ezrin/radixin/moesin (ERM), neutrophils are known to express ezrin and moesin. The behavior of these proteins in apoptotic neutrophils is not well established. In the present study, the expression and localization of ezrin and moesin by Western blot and immunofluorescence revealed a clear degradation and relocalization of both the proteins during VAA-I-induced apoptosis. Also, flow cytometry analysis revealed that VAA-I markedly and significantly induced the cell surface expression of ezrin and moesin and this was reversed when cells were pretreated with the Syk inhibitor piceatannol. The expression of ezrin and moesin on the cell surface of apoptotic neutrophils may represent a mechanism responsible for the appearance of autoantibodies directed against ERM proteins, which have been found in the serum of patients suffering from autoimmune diseases. Therefore, the ability of VAA-I to increase cell surface expression of cytoskeletal proteins in apoptotic neutrophils provides important insight into a possible toxic mechanism of this plant lectin and this has to be considered for its potential utilization for in vivo treatment.
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Affiliation(s)
- M.M. Simon
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Institut Armand-Frappier, Laval, QC, Canada
| | - J.C. Simard
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Institut Armand-Frappier, Laval, QC, Canada
| | - D. Girard
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Institut Armand-Frappier, Laval, QC, Canada
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Bilalic S, Michlmayr A, Gruber V, Buchberger E, Burghuber C, Böhmig GA, Oehler R. Lymphocyte activation induces cell surface expression of an immunogenic vimentin isoform. Transpl Immunol 2012; 27:101-6. [DOI: 10.1016/j.trim.2012.06.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 06/11/2012] [Accepted: 06/11/2012] [Indexed: 01/15/2023]
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Fan LY, He DY, Wang Q, Zong M, Zhang H, Yang L, Sun LS. Citrullinated vimentin stimulates proliferation, pro-inflammatory cytokine secretion, and PADI4 and RANKL expression of fibroblast-like synoviocytes in rheumatoid arthritis. Scand J Rheumatol 2012; 41:354-8. [PMID: 22765310 DOI: 10.3109/03009742.2012.670263] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES We aimed to investigate the possible effects of vimentin (Vim) and citrullinated Vim (cVim) on proliferation capacity, pro-inflammatory cytokine secretion, and the expression of peptidylarginine deiminase type 4 (PADI4) and receptor activator of nuclear factor kappa B ligand (RANKL) in cultured fibroblast-like synoviocytes (FLSs) from rheumatoid arthritis (RA) and osteoarthritis (OA) patients. METHOD Human native Vim was citrullinated with rabbit PAD in vitro and detected using a Western blot assay with anti-modified citrulline antibody (anti-MC Ab). FLSs from RA or OA synovial samples were stimulated with Vim or cVim. Cell proliferation capacity was determined using the Celltiter 96 AQueous cell proliferation assay. The concentrations of tumour necrosis factor (TNF)-α, interleukin (IL)-1, and IL-17 were measured by enzyme-linked immunosorbent assay (ELISA). The expression of PADI4 and RANKL was measured by real-time polymerase chain reaction (RT-PCR) and a Western blot assay. RESULTS Our Western blot assay with anti-MC Ab indicated that the amount of cVim increased significantly after Vim had been incubated with rabbit PAD in vitro. The proliferation capacity and secretion of TNF-α and IL-1 were significantly enhanced in the FLSs of RA patients when treated with cVim. However, when treated with Vim, an inhibitory effect on the proliferation capacity was noted in the FLSs from RA and also from OA patients. cVim significantly increased the expression of PADI4 and RANKL in the FLSs from RA patients. CONCLUSION cVim seems to have remarkable biological effects on RA as confirmed by the stimulation of proliferation capacity, pro-inflammatory cytokine secretion, and PADI4 and RANKL expression in the FLSs of RA patients.
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Affiliation(s)
- L Y Fan
- Department of Clinical Laboratory, Shanghai East Hospital, School of Medicine, Tong Ji University, 150 Ji Mo Road, Shanghai, China.
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91
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Activation of human neutrophils by the anti-inflammatory mediator Esenbeckia leiocarpa leads to atypical apoptosis. Mediators Inflamm 2012; 2012:198382. [PMID: 22649276 PMCID: PMC3356978 DOI: 10.1155/2012/198382] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 02/20/2012] [Accepted: 02/23/2012] [Indexed: 01/08/2023] Open
Abstract
Despite the fact that Esenbeckia leiocarpa, a Brazilian plant, possesses potential anti-inflammatory properties, its effect in neutrophils, key players in inflammation, has never been investigated. In this study, a crude hydroalcoholic extract (CHE) was used to evaluate the potential toxic or agonistic effect of E. leiocarpa in human neutrophils. At a noncytotoxic concentration of 500 μg/mL, CHE increased actin polymerization and cell signaling events, especially p38 MAPK. Its modulatory activity on neutrophil cell apoptosis was investigated by cytology and by flow cytometry and, although CHE increased the apoptotic rate (by cytology) and increased annexin-V binding, it did not, unexpectedly, increase CD16 shedding. CHE increased the degradation of the cytoskeletal proteins gelsolin and paxillin but, surprisingly, not of vimentin. The proapoptotic activity of CHE was reversed by a pan-caspase inhibitor but not by a p38 inhibitor. We conclude that CHE is a novel human neutrophil agonist that induces apoptosis by a caspase-dependent and p38-independent mechanism in an atypical fashion based on its lack of effect on CD16 shedding and vimentin degradation. Since the resolution of inflammation occurs by elimination of apoptotic neutrophils, the ability of CHE to induce neutrophil apoptosis correlates well with its anti-inflammatory properties, as previously reported.
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92
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Plummer EM, Thomas D, Destito G, Shriver LP, Manchester M. Interaction of cowpea mosaic virus nanoparticles with surface vimentin and inflammatory cells in atherosclerotic lesions. Nanomedicine (Lond) 2012; 7:877-88. [PMID: 22394183 DOI: 10.2217/nnm.11.185] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
AIMS Detection of atherosclerosis has generally been limited to the late stages of development, after cardiovascular symptoms present or a clinical event occurs. One possibility for early detection is the use of functionalized nanoparticles. The aim of this study was the early imaging of atherosclerosis using nanoparticles with a natural affinity for inflammatory cells in the lesion. MATERIALS & METHODS We investigated uptake of cowpea mosaic virus by macrophages and foam cells in vitro and correlated this with vimentin expression. We also examined the ability of cowpea mosaic virus to interact with atherosclerotic lesions in a murine model of atherosclerosis. RESULTS & CONCLUSION We found that uptake of cowpea mosaic virus is increased in areas of atherosclerotic lesion. This correlated with increased surface vimentin in the lesion compared with nonlesion vasculature. In conclusion, cowpea mosaic virus and its vimentin-binding region holds potential for use as a targeting ligand for early atherosclerotic lesions, and as a probe for detecting upregulation of surface vimentin during inflammation.
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Affiliation(s)
- Emily M Plummer
- University of California, San Diego, Skaggs School of Pharmacy, La Jolla, CA 92093-0749, USA
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93
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Starr AE, Bellac CL, Dufour A, Goebeler V, Overall CM. Biochemical characterization and N-terminomics analysis of leukolysin, the membrane-type 6 matrix metalloprotease (MMP25): chemokine and vimentin cleavages enhance cell migration and macrophage phagocytic activities. J Biol Chem 2012; 287:13382-95. [PMID: 22367194 PMCID: PMC3339980 DOI: 10.1074/jbc.m111.314179] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The neutrophil-specific protease membrane-type 6 matrix metalloproteinase (MT6-MMP)/MMP-25/leukolysin is implicated in multiple sclerosis and cancer yet remains poorly characterized. To characterize the biological roles of MT6-MMP, it is critical to identify its substrates for which only seven are currently known. Here, we biochemically characterized MT6-MMP, profiled its tissue inhibitor of metalloproteinase inhibitory spectrum, performed degradomics analyses, and screened 26 chemokines for cleavage using matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry. MT6-MMP processes seven each of the CXC and CC chemokine subfamilies. Notably, cleavage of the neutrophil chemoattractant CXCL5 activates the chemokine, thereby increasing its agonist activity, indicating a feed-forward mechanism for neutrophil recruitment. Likewise, cleavage also activated CCL15 and CCL23 to increase monocyte recruitment. Utilizing the proteomics approach proteomic identification of cleavage site specificity (PICS), we identified 286 peptidic cleavage sites spanning from P6 to P6′ from which an unusual glutamate preference in P1 was identified. The degradomics screen terminal amine isotopic labeling of substrates (TAILS), which enriches for neo-N-terminal peptides of cleaved substrates, was used to identify 58 new native substrates in fibroblast secretomes after incubation with MT6-MMP. Vimentin, cystatin C, galectin-1, IGFBP-7, and secreted protein, acidic and rich in cysteine (SPARC) were among those substrates we biochemically confirmed. An extracellular “moonlighting” form of vimentin is a chemoattractant for THP-1 cells, but MT6-MMP cleavage abolished monocyte recruitment. Unexpectedly, the MT6-MMP-cleaved vimentin potently stimulated phagocytosis, which was not a property of the full-length protein. Hence, MT6-MMP regulates neutrophil and monocyte chemotaxis and by generating “eat-me” signals upon vimentin cleavage potentially increases phagocytic removal of neutrophils to resolve inflammation.
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Affiliation(s)
- Amanda E Starr
- Centre for Blood Research, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
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94
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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: 1064] [Impact Index Per Article: 81.8] [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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95
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Liang JJ, Yu CY, Liao CL, Lin YL. Vimentin binding is critical for infection by the virulent strain of Japanese encephalitis virus. Cell Microbiol 2011; 13:1358-70. [PMID: 21707907 DOI: 10.1111/j.1462-5822.2011.01624.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Japanese encephalitis virus (JEV), a mosquito-borne flavivirus, causes acute encephalitis with high mortality in humans. We used a pair of virulent (RP-9) and attenuated (RP-2ms) variants of JEV to pull down the cell surface molecules bound with JEV particle; their identities were revealed by LC-MS/MS analysis. One major protein bound with RP-9 and weakly with RP-2ms was identified as the intermediate filament protein vimentin. Infection of RP-9 but not that of RP-2ms was blocked by anti-vimentin antibodies and by recombinant-expressed vimentin proteins. Knockdown of vimentin expression reduced the levels of viral binding and viral production of RP-9, but not that of RP-2ms. The different vimentin dependency for JEV infection could be attributed to the major structural envelope protein, as the recombinant RP-9 with an E-E138K mutation became resistant to anti-vimentin blockage. Furthermore, RP-2ms mainly depended on cell surface glycosaminoglycans for viral binding and it became vimentin-dependent only when binding to glycosaminoglycans was blocked. Thus, we suggest that vimentin contributes to virulent JEV infection and might be a new target to intervene in this deadly infection.
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Affiliation(s)
- Jian-Jong Liang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
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96
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Cutrera J, Dibra D, Xia X, Hasan A, Reed S, Li S. Discovery of a linear peptide for improving tumor targeting of gene products and treatment of distal tumors by IL-12 gene therapy. Mol Ther 2011; 19:1468-77. [PMID: 21386825 DOI: 10.1038/mt.2011.38] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Like many effective therapeutics, interleukin-12 (IL-12) therapy often causes side effects. Tumor targeted delivery may improve the efficacy and decrease the toxicity of systemic IL-12 treatments. In this study, a novel targeting approach was investigated. A secreted alkaline phosphatase (SEAP) reporter gene-based screening process was used to identify a mini-peptide which can be produced in vivo to target gene products to tumors. The coding region for the best peptide was inserted into an IL-12 gene to determine the antitumor efficacy. Affinity chromatography, mass spectrometry analysis, and binding studies were used to identify a receptor for this peptide. We discovered that the linear peptide VNTANST increased the tumor accumulation of the reporter gene products in five independent tumor models including one human xenogeneic model. The product from VNTANST-IL-12 fusion gene therapy increased accumulation of IL-12 in the tumor environment, and in three tumor models, VNTANST-IL-12 gene therapy inhibited distal tumor growth. In a spontaneous lung metastasis model, inhibition of metastatic tumor growth was improved compared to wild-type IL-12 gene therapy, and in a squamous cell carcinoma model, toxic liver lesions were reduced. The receptor for VNTANST was identified as vimentin. These results show the promise of using VNTANST to improve IL-12 treatments.
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Affiliation(s)
- Jeffry Cutrera
- Department of Pediatrics, MD Anderson Cancer Center, Houston, Texas, USA
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97
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Steinmetz NF, Cho CF, Ablack A, Lewis JD, Manchester M. Cowpea mosaic virus nanoparticles target surface vimentin on cancer cells. Nanomedicine (Lond) 2011; 6:351-64. [PMID: 21385137 PMCID: PMC3436905 DOI: 10.2217/nnm.10.136] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AIMS Vimentin, a type III intermediate filament, is upregulated during epithelial-mesenchymal transition and tumor progression. Vimentin is surface-expressed on cells involved in inflammation; the function remains unknown. We investigated the expression of surface vimentin on cancer cells and evaluated targeting nanoparticles to tumors exploiting vimentin. MATERIALS & METHODS Cowpea mosaic virus nanoparticles that interact with surface vimentin were used as probes. Tumor homing was tested using the chick chorioallantoic membrane model with human tumor xenografts. RESULTS & DISCUSSION Surface vimentin levels varied during cell cycle and among the cell lines tested. Surface vimentin expression correlated with cowpea mosaic virus uptake, underscoring the utility of cowpea mosaic virus to detect invasive cancer cells. Targeting to tumor xenografts was observed; homing was based on the enhanced permeability and retention effect. Our data provide novel insights into the role of surface vimentin in cancer and targeting nanoparticles in vivo.
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Affiliation(s)
- Nicole F Steinmetz
- Department for Cell Biology, Center for Integrative Molecular Biosciences, The Scripps Research Institute, La Jolla, CA, USA
- Department of Biomedical Engineering, Case Center for Imaging Research, Case Western Reserve University, Cleveland, OH, USA
| | - Choi-Fong Cho
- Translational Prostate Cancer Research Group, London Regional Cancer Program, London, ON, Canada
- Department of Medical Biophysics, University of Western Ontario, London, ON, Canada
| | - Amber Ablack
- Translational Prostate Cancer Research Group, London Regional Cancer Program, London, ON, Canada
| | - John D Lewis
- Translational Prostate Cancer Research Group, London Regional Cancer Program, London, ON, Canada
- Department of Medical Biophysics, University of Western Ontario, London, ON, Canada
| | - Marianne Manchester
- Department for Cell Biology, Center for Integrative Molecular Biosciences, The Scripps Research Institute, La Jolla, CA, USA
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98
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Che X, Chi F, Wang L, Jong TD, Wu CH, Wang X, Huang SH. Involvement of IbeA in meningitic Escherichia coli K1-induced polymorphonuclear leukocyte transmigration across brain endothelial cells. Brain Pathol 2010; 21:389-404. [PMID: 21083634 DOI: 10.1111/j.1750-3639.2010.00463.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Transmigration of neutrophil [polymorphonuclear neutrophil (PMN)] across the blood-brain barrier (BBB) is a critical event in the pathogenesis of bacterial meningitis. We have shown that IbeA is able to induce meningitic Escherichia coli invasion of brain microvascular endothelial cells (BMECs), which constitutes the BBB. In this report, we provide evidence that IbeA and its receptor, vimentin, play a key role in E. coli-induced PMN transmigration across BMEC. In vitro and in vivo studies indicated that the ibeA-deletion mutant ZD1 was significantly less active in stimulating PMN transmigration than the parent strain E44. ZD1 was fully complemented by the ibeA gene and its product. E. coli-induced PMN transmigration was markedly inhibited by withaferin A, a dual inhibitor of vimentin and proteasome. These cellular effects were significantly stimulated and blocked by overexpression of vimentin and its head domain deletion mutant in human BMEC, respectively. Our studies further demonstrated that IbeA-induced PMN migration was blocked by bortezomib, a proteasomal inhibitor and correlated with upregulation of endothelial ICAM-1 and CD44 expression through proteasomal regulation of NFκB activity. Taken together, our data suggested that IbeA and vimentin contribute to E. coli K1-stimulated PMN transendothelial migration that is correlated with upregulation of adhesion molecule expression at the BBB.
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Affiliation(s)
- Xiaojuan Che
- Saban Research Institute of Childrens Hospital Los Angeles, Department of Pediatrics, University of Southern California, Los Angeles, CA 90027, USA
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99
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Mellgren RL. A plasma membrane wound proteome: reversible externalization of intracellular proteins following reparable mechanical damage. J Biol Chem 2010; 285:36597-607. [PMID: 20810652 DOI: 10.1074/jbc.m110.110015] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Cells in mechanically active tissues undergo constant plasma membrane damage that must be repaired to allow survival. To identify wound-associated proteins, a cell-impermeant, thiol-reactive biotinylation reagent was used to label and subsequently isolate intracellular proteins that become exposed on the surface of cultured cells after plasma membrane damage induced by scraping from substratum or crushing with glass beads. Scrape-damaged cells survived injury and were capable of forming viable colonies. Proteins that were exposed to the cell surface were degraded or internalized a few seconds to several minutes after damage, except for vimentin, which was detectable on the cell surface for at least an hour after injury. Seven major biotinylated protein bands were identified on SDS-PAGE gels. Mass spectrometric studies identified cytoskeletal proteins (caldesmon-1 and vimentin), endoplasmic reticulum proteins (ERp57, ERp5, and HSP47), and nuclear proteins (lamin C, heterogeneous nuclear ribonucleoprotein F, and nucleophosmin-1) as major proteins exposed after injury. Although caldesmon was a major wound-associated protein in calpain small subunit knock-out fibroblasts, it was rapidly degraded in wild-type cells, probably by calpains. Lamin C exposure after wounding was most likely the consequence of nuclear envelope damage. These studies document major intracellular proteins associated with the cell surface of reversibly damaged somatic cells. The studies also show that externalization of some proteins reported to have physiologic or pathologic roles on the cell surface can occur in cells undergoing plasma membrane damage and subsequent repair.
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Affiliation(s)
- Ronald L Mellgren
- Department of Physiology and Pharmacology, University of Toledo College of Medicine, Toledo, Ohio 43614-2598, USA.
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100
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Mahesh B, Leong HS, Nair KS, McCormack A, Sarathchandra P, Rose ML. Autoimmunity to vimentin potentiates graft vasculopathy in murine cardiac allografts. Transplantation 2010; 90:4-13. [PMID: 20463646 DOI: 10.1097/tp.0b013e3181dfa694] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND There is increasing evidence for a role for autoimmunity in transplant rejection. It has previously been shown that autoantibodies to vimentin (Vim) accelerate acute rejection of murine cardiac allografts. We have investigated whether autoimmunity to Vim contributes to development of cardiac allograft vasculopathy (CAV). METHODS Two well-established minor mismatch murine models of CAV were used, transplantation of 129/sv hearts into T-cell-depleted C57Bl/6 (B6) recipients and transplantation of FVB hearts into nonimmunosuppressed DBA/1 recipients. Recipients were immunized with recombinant mouse Vim in complete Freunds adjuvant, and controls received hen egg lysozyme 2 weeks before transplantation. T cell and antibody responses to Vim were assessed by ELISPOT and ELISA, respectively. CAV within transplanted hearts was assessed by quantitative morphometry of occluded vessels, presence of smooth muscle cells, deposition of C3d, and confocal microscopy. RESULTS Allografts were harvested from B6 recipients at days 30 and 45 and from DBA/1 recipients at days 18 and 35. At all days, there was significantly more intimal occlusion of arteries of Vim -immunized mice than controls. There was significantly more smooth muscle cell alpha actin in vessels from Vim-immunized mice, and more C3d deposited in hearts from Vim-immunized mice. Confocal microscopy demonstrated colocalization of Vim with C3d on endothelial cells, leukocytes, and platelets in allogeneic but not syngeneic hearts. Serum from Vim-immunized mice, but not controls, caused platelet/leukocyte conjugation when added to mouse leukocytes. CONCLUSION The autoimmune response to Vim accelerates CAV progression in these minor-mismatched models.
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Affiliation(s)
- Balakrishnan Mahesh
- National Heart and Lung Institute, Imperial College, Heart Science Centre, Harefield Hospital, Harefield, United Kingdom
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