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Liu Y, Xiao J, Zhang B, Shelite TR, Su Z, Chang Q, Judy B, Li X, Drelich A, Bei J, Zhou Y, Zheng J, Jin Y, Rossi SL, Tang SJ, Wakamiya M, Saito T, Ksiazek T, Kaphalia B, Gong B. Increased talin-vinculin spatial proximities in livers in response to spotted fever group rickettsial and Ebola virus infections. J Transl Med 2020; 100:1030-1041. [PMID: 32238906 PMCID: PMC7111589 DOI: 10.1038/s41374-020-0420-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 03/12/2020] [Accepted: 03/12/2020] [Indexed: 12/17/2022] Open
Abstract
Talin and vinculin, both actin-cytoskeleton-related proteins, have been documented to participate in establishing bacterial infections, respectively, as the adapter protein to mediate cytoskeleton-driven dynamics of the plasma membrane. However, little is known regarding the potential role of the talin-vinculin complex during spotted fever group rickettsial and Ebola virus infections, two dreadful infectious diseases in humans. Many functional properties of proteins are determined by their participation in protein-protein complexes, in a temporal and/or spatial manner. To resolve the limitation of application in using mouse primary antibodies on archival, multiple formalin-fixed mouse tissue samples, which were collected from experiments requiring high biocontainment, we developed a practical strategic proximity ligation assay (PLA) capable of employing one primary antibody raised in mouse to probe talin-vinculin spatial proximal complex in mouse tissue. We observed an increase of talin-vinculin spatial proximities in the livers of spotted fever Rickettsia australis or Ebola virus-infected mice when compared with mock mice. Furthermore, using EPAC1-knockout mice, we found that deletion of EPAC1 could suppress the formation of spatial proximal complex of talin-vinculin in rickettsial infections. In addition, we observed increased colocalization between spatial proximity of talin-vinculin and filamentous actin-specific phalloidin staining in single survival mouse from an ordinarily lethal dose of rickettsial or Ebola virus infection. These findings may help to delineate a fresh insight into the mechanisms underlying liver specific pathogenesis during infection with spotted fever rickettsia or Ebola virus in the mouse model.
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Affiliation(s)
- Yakun Liu
- 0000 0001 1547 9964grid.176731.5Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Jie Xiao
- 0000 0001 1547 9964grid.176731.5Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Ben Zhang
- 0000 0001 1547 9964grid.176731.5Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Thomas R. Shelite
- 0000 0001 1547 9964grid.176731.5Department of Internal Medicine, Infectious Diseases, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Zhengchen Su
- 0000 0001 1547 9964grid.176731.5Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Qing Chang
- 0000 0001 1547 9964grid.176731.5Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Barbara Judy
- 0000 0001 1547 9964grid.176731.5Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Xiang Li
- 0000 0001 1547 9964grid.176731.5Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Aleksandra Drelich
- 0000 0001 1547 9964grid.176731.5Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Jiani Bei
- 0000 0001 1547 9964grid.176731.5Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555 USA ,0000 0004 0532 1428grid.265231.1Present Address: Life Science Department, Tunghai University, Taichung City, Taiwan
| | - Yixuan Zhou
- 0000 0001 1547 9964grid.176731.5Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555 USA ,0000 0004 0369 1599grid.411525.6Present Address: Department of Cardiovascular Surgery, Changhai Hospital, Shanghai, China
| | - Junying Zheng
- 0000 0001 1547 9964grid.176731.5Department of Neuroscience and Cell Biology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Yang Jin
- 0000 0004 1936 7558grid.189504.1Division of Pulmonary and Critical Care Medicine, Department of Medicine, Boston University Medical Campus, Boston, MA USA
| | - Shannan L. Rossi
- 0000 0001 1547 9964grid.176731.5Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Shao-Jun Tang
- 0000 0001 1547 9964grid.176731.5Department of Neuroscience and Cell Biology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Maki Wakamiya
- 0000 0001 1547 9964grid.176731.5Department of Neurology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Tais Saito
- 0000 0001 1547 9964grid.176731.5Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Thomas Ksiazek
- 0000 0001 1547 9964grid.176731.5Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Bhupendra Kaphalia
- 0000 0001 1547 9964grid.176731.5Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555 USA
| | - Bin Gong
- Department of Pathology, University of Texas Medical Branch, Galveston, TX, 77555, USA.
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Chézeau L, Kohlstaedt LA, Le Faou A, Cosnier F, Rihn B, Gaté L. Proteomic analysis of bronchoalveolar lavage fluid in rat exposed to TiO 2 nanostructured aerosol by inhalation. J Proteomics 2019; 207:103451. [PMID: 31323425 DOI: 10.1016/j.jprot.2019.103451] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 06/23/2019] [Accepted: 07/15/2019] [Indexed: 12/30/2022]
Abstract
The pulmonary toxicological properties of inhaled titanium dioxide were studied using bronchoalveolar lavage fluid (BALF) cytology and proteomics analyses. Fischer 344 rats were exposed to 10 mg/m3 of TiO2 nanostructured aerosol by nose-only inhalation for 6 h/day, 5 days/week for 4 weeks. Lung samples were collected up to 180 post-exposure days. As previously described, cytological analyses of BALF showed a strong inflammatory response up to 3 post-exposure days, which persisted however, at a lower intensity up to 180 days. In addition, using Multidimensional Protein Identification Technology (MudPIT), we identified a total of 107, 50 and 45 proteins (UniprotKB identifiers) differentially expressed in exposed rats immediately, 3 and 180 days after the end of exposure respectively. Increased levels of inflammatory proteins, members of proteasome, various histones, proteins involved in cytoskeleton organization, were noticed up to 3 days (short-term response). Some of these proteins were linked with Neutrophil Extracellular Trap formation (NETosis). Long-term response was also characterized by a persistent altered expression of proteins up to 180 days. Altogether, these results suggest that exposure to low toxicity low solubility nanomaterials such as TiO2 may induce long-term changes in the pulmonary protein expression pattern of which the physio-pathological consequences are unknown. SIGNIFICANCE: This paper describes in rats, at the pulmonary level, the effects of inhaled nanostructured aerosol of TiO2 on the secreted proteins found in the broncho-alveolar space by comparing the proteomic profile in broncho-alveolar lavage fluid supernatants of control and exposed animals. This work brings new insights about the early events occurring following the end of exposure and suggests the formation of Neutrophil Extracellular Traps (NETosis) that could be interpret as a potential early mechanism of defense against TiO2 nanoparticles. This work also describes the long term effects (180 post-exposure days) of such an exposure and the change in secreted protein expression in the absence of significant histopathological modifications.
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Affiliation(s)
- Laëtitia Chézeau
- Institut National de Recherche et de Sécurité, Rue du Morvan, CS 60027, 54519 Vandœuvre, Cedex, France; EA 3452 CITHEFOR, Université de Lorraine, BP 80403, 54001 Nancy Cedex, France
| | - Lori A Kohlstaedt
- California Institute for Quantitative Biosciences, University of California, Berkeley, CA 94720, United States of America
| | - Alain Le Faou
- EA 3452 CITHEFOR, Université de Lorraine, BP 80403, 54001 Nancy Cedex, France
| | - Frédéric Cosnier
- Institut National de Recherche et de Sécurité, Rue du Morvan, CS 60027, 54519 Vandœuvre, Cedex, France
| | - Bertrand Rihn
- EA 3452 CITHEFOR, Université de Lorraine, BP 80403, 54001 Nancy Cedex, France; Institut Jean-Lamour, UMR 7198 CNRS, Université de Lorraine, 54011 Nancy Cedex, France
| | - Laurent Gaté
- Institut National de Recherche et de Sécurité, Rue du Morvan, CS 60027, 54519 Vandœuvre, Cedex, France.
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Ha SH, Kim HK, Anh NTT, Kim N, Ko KS, Rhee BD, Han J. Time-dependent proteomic and genomic alterations in Toll-like receptor-4-activated human chondrocytes: increased expression of lamin A/C and annexins. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2017; 21:531-546. [PMID: 28883757 PMCID: PMC5587603 DOI: 10.4196/kjpp.2017.21.5.531] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 05/04/2017] [Accepted: 05/10/2017] [Indexed: 12/25/2022]
Abstract
Activation of Toll-like receptor-4 (TLR-4) in articular chondrocytes increases the catabolic compartment and leads to matrix degradation during the development of osteoarthritis. In this study, we determined the proteomic and genomic alterations in human chondrocytes during lipopolysaccharide (LPS)-induced inflammation to elucidate the underlying mechanisms and consequences of TLR-4 activation. Human chondrocytes were cultured with LPS for 12, 24, and 36 h to induce TLR-4 activation. The TLR-4-induced inflammatory response was confirmed by real-time PCR analysis of increased interleukin-1 beta (IL-1β), interleukin-6 (IL-6), and tumor necrosis factor alpha (TNF-α) expression levels. In TLR-4-activated chondrocytes, proteomic changes were determined by two-dimensional electrophoresis and matrix-assisted laser desorption/ionization-mass spectroscopy analysis, and genomic changes were determined by microarray and gene ontology analyses. Proteomics analysis identified 26 proteins with significantly altered expression levels; these proteins were related to the cytoskeleton and oxidative stress responses. Gene ontology analysis indicated that LPS treatment altered specific functional pathways including ‘chemotaxis’, ‘hematopoietic organ development’, ‘positive regulation of cell proliferation’, and ‘regulation of cytokine biosynthetic process’. Nine of the 26 identified proteins displayed the same increased expression patterns in both proteomics and genomics analyses. Western blot analysis confirmed the LPS-induced increases in expression levels of lamin A/C and annexins 4/5/6. In conclusion, this study identified the time-dependent genomic, proteomic, and functional pathway alterations that occur in chondrocytes during LPS-induced TLR-4 activation. These results provide valuable new insights into the underlying mechanisms that control the development and progression of osteoarthritis.
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Affiliation(s)
- Seung Hee Ha
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Department of Health Sciences and Technology, BK21 Plus Project Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea.,Department of Health Technology Development, Health Project Management Team, Korea Health Industry Development Institute (KHIDI), Cheongju 28159, Korea
| | - Hyoung Kyu Kim
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Department of Health Sciences and Technology, BK21 Plus Project Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
| | - Nguyen Thi Tuyet Anh
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Department of Health Sciences and Technology, BK21 Plus Project Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
| | - Nari Kim
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Department of Health Sciences and Technology, BK21 Plus Project Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
| | - Kyung Soo Ko
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Department of Health Sciences and Technology, BK21 Plus Project Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
| | - Byoung Doo Rhee
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Department of Health Sciences and Technology, BK21 Plus Project Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
| | - Jin Han
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Department of Health Sciences and Technology, BK21 Plus Project Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
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Méplan C, Johnson IT, Polley ACJ, Cockell S, Bradburn DM, Commane DM, Arasaradnam RP, Mulholland F, Zupanic A, Mathers JC, Hesketh J. Transcriptomics and proteomics show that selenium affects inflammation, cytoskeleton, and cancer pathways in human rectal biopsies. FASEB J 2016; 30:2812-25. [PMID: 27103578 DOI: 10.1096/fj.201600251r] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 04/12/2016] [Indexed: 01/11/2023]
Abstract
Epidemiologic studies highlight the potential role of dietary selenium (Se) in colorectal cancer prevention. Our goal was to elucidate whether expression of factors crucial for colorectal homoeostasis is affected by physiologic differences in Se status. Using transcriptomics and proteomics followed by pathway analysis, we identified pathways affected by Se status in rectal biopsies from 22 healthy adults, including 11 controls with optimal status (mean plasma Se = 1.43 μM) and 11 subjects with suboptimal status (mean plasma Se = 0.86 μM). We observed that 254 genes and 26 proteins implicated in cancer (80%), immune function and inflammatory response (40%), cell growth and proliferation (70%), cellular movement, and cell death (50%) were differentially expressed between the 2 groups. Expression of 69 genes, including selenoproteins W1 and K, which are genes involved in cytoskeleton remodelling and transcription factor NFκB signaling, correlated significantly with Se status. Integrating proteomics and transcriptomics datasets revealed reduced inflammatory and immune responses and cytoskeleton remodelling in the suboptimal Se status group. This is the first study combining omics technologies to describe the impact of differences in Se status on colorectal expression patterns, revealing that suboptimal Se status could alter inflammatory signaling and cytoskeleton in human rectal mucosa and so influence cancer risk.-Méplan, C., Johnson, I. T., Polley, A. C. J., Cockell, S., Bradburn, D. M., Commane, D. M., Arasaradnam, R. P., Mulholland, F., Zupanic, A., Mathers, J. C., Hesketh, J. Transcriptomics and proteomics show that selenium affects inflammation, cytoskeleton, and cancer pathways in human rectal biopsies.
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Affiliation(s)
- Catherine Méplan
- Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle-upon-Tyne, United Kingdom; School of Biomedical Sciences, Newcastle University, Newcastle-upon-Tyne, United Kingdom; Human Nutrition Research Centre, Newcastle University, Newcastle-upon-Tyne, United Kingdom; The Medical School, Newcastle University, Newcastle-upon-Tyne, United Kingdom;
| | - Ian T Johnson
- Institute of Food Research, Norwich Research Park, Norwich, United Kingdom
| | - Abigael C J Polley
- Institute of Food Research, Norwich Research Park, Norwich, United Kingdom
| | - Simon Cockell
- Bioinformatics Support Unit, Newcastle University, Newcastle-upon-Tyne, United Kingdom
| | | | - Daniel M Commane
- Human Nutrition Research Centre, Newcastle University, Newcastle-upon-Tyne, United Kingdom
| | - Ramesh P Arasaradnam
- School of Biomedical Sciences, Newcastle University, Newcastle-upon-Tyne, United Kingdom; Wansbeck General Hospital, Ashingon, United Kingdom; and **Institute of Cellular Medicine, Newcastle University, Newcastle-upon-Tyne, United Kingdom
| | - Francis Mulholland
- Institute of Food Research, Norwich Research Park, Norwich, United Kingdom
| | - Anze Zupanic
- Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle-upon-Tyne, United Kingdom
| | - John C Mathers
- Human Nutrition Research Centre, Newcastle University, Newcastle-upon-Tyne, United Kingdom; **Institute of Cellular Medicine, Newcastle University, Newcastle-upon-Tyne, United Kingdom
| | - John Hesketh
- Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle-upon-Tyne, United Kingdom; Human Nutrition Research Centre, Newcastle University, Newcastle-upon-Tyne, United Kingdom; The Medical School, Newcastle University, Newcastle-upon-Tyne, United Kingdom
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5
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MA XIAOYAN, YANG FAN, YANG SHULI, RASUL AZHAR, LI TING, LIU LIANLIAN, KONG MIN, GUO DONGMEI, MA TONGHUI. Number and distribution of myofibroblasts and α-smooth muscle actin expression levels in fetal membranes with and without gestational complications. Mol Med Rep 2015; 12:2784-92. [DOI: 10.3892/mmr.2015.3719] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 11/07/2014] [Indexed: 11/05/2022] Open
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6
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KONG MIN, LIU LIANLIAN, YI FEI, KHAN MUHAMMAD, RASUL AZHAR, YANG FAN, MA XIAOYAN, MA TONGHUI. Prevalence of infarct and villous clumps, and the expression of α-smooth muscle actin in the placental basal plate in severe preeclampsia. Mol Med Rep 2013; 8:1067-73. [DOI: 10.3892/mmr.2013.1651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Accepted: 07/08/2013] [Indexed: 11/05/2022] Open
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Proteomic identification of endothelial cell surface proteins isolated from the hepatic portal vein of mice infected with Schistosoma bovis. J Proteomics 2012; 77:129-43. [DOI: 10.1016/j.jprot.2012.07.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Revised: 07/10/2012] [Accepted: 07/10/2012] [Indexed: 11/22/2022]
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8
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Moisan E, Girard D. Cell surface expression of intermediate filament proteins vimentin and lamin B1 in human neutrophil spontaneous apoptosis. J Leukoc Biol 2006; 79:489-98. [PMID: 16365157 DOI: 10.1189/jlb.0405190] [Citation(s) in RCA: 132] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Neutrophils represent an important source of autoantigens for antineutrophil cytoplasmic antibody associated with vasculitis. To date, two cytoskeletal proteins, vinculin and vimentin, have been reported to be expressed on the cell surfaces of activated macrophages, platelets, and apoptotic T lymphocytes. However, such cell surface expression has never been studied in human neutrophils. As we recently demonstrated that different cytoskeletal proteins were cleaved in apoptotic neutrophils, we hypothesized that some of these were expressed on the cell surface of apoptotic neutrophils. Herein, we found that among vinculin, paxillin, gelsolin, vimentin, lamin B1, alpha-tubulin, and beta-tubulin, only the two intermediate filament (INFIL) proteins, vimentin and lamin B1, are expressed on the cell surface of 24-h aged neutrophils [spontaneous apoptosis (SA)]. By monitoring intracellular expression of vimentin and lamin B1 during SA, we found that these two proteins were cleaved and that such cleavage was reversed by the pan caspase inhibitor N-benzyloxy-carbonyl-V-A-D-O-methylfluoromethyl ketone (z-VAD-fmk). When neutrophil apoptosis was delayed or suppressed by lipopolysaccharide or the cytokines granulocyte-colony stimulating factor (G-CSF), granulocyte macrophage (GM)-CSF, or interleukin-4, the loss of intracellular expression of vimentin and lamin B1 was prevented. The INFIL proteins were absent from the cell surface when neutrophil apoptosis was delayed. Addition of z-VAD-fmk significantly decreased the cell surface expression of vimentin and lamin B1 during SA. This study provides the first evidence that apoptotic neutrophils express cytoskeletal proteins on their surface, opening the possibility that these cells may participate in the development of autoantibodies directed against cytoskeletal proteins, a condition frequently reported in several inflammatory diseases.
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Affiliation(s)
- Eliane Moisan
- INRS-Institut Armand-Frappier, Université du Québec, Canada
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9
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Abstract
OBJECTIVES Cytokeratins are a major constituent of the cytoskeleton in eukaryotic cells and are vital for the maintenance of cell structure and function. Identification of increased levels of IgA antibodies to these intracellular structures has prompted increasing interest in the potential role between the gut and the immune system in the pathogenesis of inflammatory arthritis. This review examines the salient features of cytokeratin (CK) antibodies that are relevant to inflammatory arthropathies and discusses the meaning and potential applications of these findings in the context of the different arthropathies. METHODS Review of the literature on antibodies to cytokeratins in inflammatory arthropathies, using MEDLINE and the key words (cyto)keratin and arthritis. The studies were interpreted and critiqued. RESULTS Increased levels of IgA antibodies to CK-18 and epidermal keratins have been shown by enzyme-linked immunosorbent assay (ELISA) in rheumatoid arthritis and psoriatic arthritis. Levels were not increased in osteoarthritis or reactive arthritis. CONCLUSIONS CK-18 is present within endothelial cells lining synovial blood vessels in patients with various rheumatic conditions, including rheumatoid arthritis, as well as in normal controls. Damage to synovial endothelial cells may lead to increased production of antibodies to CK-18. The CK antibody response is independent of the polyclonal immunoglobulin expansion typical of RA and is not specific for RA because an increased IgA response to CK-18 also has been shown in psoriasis and in psoriatic arthritis. Damage to synovial endothelial cells does not explain the increased autoantibody production in other conditions such as psoriasis. In this condition, damage to epithelial tissues in other regions of the body (e.g, skin, gut, kidney) may lead to production of keratin antibodies that recognize epitopes common to all CK, including CK-18. The reason for an elevated IgA anti-CK response rather than an IgG or IgM response is not clear. It cannot be explained by a general increase in serum IgA levels. Most of the conditions in which raised levels of these antibodies were found have been associated to different degrees with abnormalities of the gut mucosa or mucosal immune system. It appears that the nature of autoantibodies to CK-18 is probably natural rather than pathogenic. Currently there are no data on the source of the IgA antibodies to cytokeratins (i.e., mucosal or central immune system). Indeed, it may depend on the disease.
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Affiliation(s)
- A A Borg
- Gwent Rheumatology Service, Nevill Hall Hospital, Monmouthshire, South Wales, United Kingdom
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10
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De Clerck LS, Mertens AV, De Gendt CM, Bridts CH, Stevens WJ. Actin polymerisation in neutrophils of rheumatoid arthritis patients in relation to treatment with non-steroidal anti-inflammatory drugs. Clin Chim Acta 1997; 261:19-25. [PMID: 9187501 DOI: 10.1016/s0009-8981(96)06505-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
There is evidence that neutrophil functions such as chemotaxis and oxygen radical formation are disturbed in rheumatoid arthritis (RA). Medication might also influence these functions. Cyclic formation and depolymerisation of actin microfilaments is crucial in cell motility, but this phenomenon has not been studied in RA. The aim of this study was to investigate basal and dynamic (formyl-methionyl-leucyl-phenylalanine (fMLP)-induced) neutrophil actin polymerisation in ten RA patients (a) during therapy with non-steroidal anti-inflammatory drugs (NSAIDS) and (b) after stopping NSAIDS> The results were compared with those of ten age-matched controls. Basal F-actin content in RA patients with NSAIDS was significantly lower than in RA patients without NSAIDS and controls: 35.5 (25.0-49.0), 50.5 (27.0-75.0) and 52.5 (32.0-85.0), respectively. Conversely, upon stimulation with fMLP, the actin polymerisation curve of RA patients with NSAIDS was higher than for RA patients without NSAIDS and controls. These results suggest that, in RA, the effects orf NSAIDS on neutrophil functions might be related to changes in the actin polymerisation-depolymerisation cycle.
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Affiliation(s)
- L S De Clerck
- Department of Immunology, Allergology and Rheumatology, University of Antwerpen, Belgium
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11
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Hidalgo MA, Sarathchandra P, Fryer PR, Fuller BJ, Green CJ. Scanning electron microscopic changes in morphology of pulmonary endothelium in rat lung isografts following hypothermic ischaemic storage and transplantation. Int J Exp Pathol 1995; 76:339-51. [PMID: 7488548 PMCID: PMC1997191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Endothelial monolayer integrity is a critical factor limiting vascular permeability of solid organs in transplantation. Several in vitro, ex vivo and in vivo studies suggest that damage to endothelial cells (EC) due to hypothermia and ischaemia-reperfusion injury causes morphological and functional damage to the endothelium leading to parenchymal oedema and haemorrhage. Aiming to study morphological changes to arterial pulmonary EC subjected to transplantation procedures, random scanning electron micrographs of vascular endothelium of rat lungs were taken. Forty-eight rat lungs were hypothermically stored for 48 or 72 hours in two different preservation solutions and studied either at the end of the cold storage period, or 5 min, 24 h or 4 weeks following transplantation. After 5 minutes of revascularization, micrographs showed EC shape variations, bleb formation and cell retraction with intercellular gap formation. Twenty-four hours after transplantation loss of monolayer continuity was widely extended. Four weeks of revascularization resulted in either well preserved specimens with nearly normal endothelium, or badly preserved arteries with fibrotic degeneration of the luminal vessel wall. The morphological disruptions found in this study help to explain the alterations in permeability control and vascular dysfunction observed in lung transplantation.
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Affiliation(s)
- M A Hidalgo
- Department of Surgical Research, Northwick Park Institute for Medical Research, Harrow, Middlesex, UK
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12
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Claesson R, Johansson E, Carlsson J. Oxygen-dependent modulation of release and activity of polymorphonuclear leukocyte granule products. ORAL MICROBIOLOGY AND IMMUNOLOGY 1994; 9:81-7. [PMID: 8008434 DOI: 10.1111/j.1399-302x.1994.tb00039.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Polymorphonuclear leukocytes are important in the defense against the anaerobic microflora of infected gingival pockets. One part of this defense is release of antibacterial granule products by polymorphonuclear leukocytes into the pockets. The aim of the present study was to compare the efficiency of polymorphonuclear leukocytes in releasing granule products under aerobic and anaerobic conditions. Polymorphonuclear leukocytes were exposed to serum-opsonized zymosan under aerobic and anaerobic conditions. The levels of released granule products were determined by combining measurements of activity with enzyme-linked immunosorbent assays. The level of released elastase was twice as high in anaerobic as in aerobic reaction mixtures. A similar difference was not detected for myeloperoxidase. However, myeloperoxidase was inactivated after its release under aerobic conditions. The release of lactoferrin was an efficient under aerobic as under anaerobic conditions. The effect of aerobic conditions on the release of elastase and the inactivation of myeloperoxidase could be ascribed to oxidants formed in the myeloperoxidase-H2O2-chloride system. Also, the activity of the released cytoplasmic enzyme lactate dehydrogenase was inactivated by oxidants formed in the myeloperoxidase-H2O2-chloride system. These findings suggest that, in the anaerobic environment of the gingival pocket, elastase and possibly also other azurophilic granule products are released in higher amounts than under fully oxygenated conditions. In this environment, the released products may also escape inactivation by the myeloperoxidase-H2O2-chloride system.
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Affiliation(s)
- R Claesson
- Department of Oral Microbiology, University of Umeå, Sweden
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13
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French PW, Penny R, Yang JL. A confocal microscopy study of anticytoskeletal antibody activity in patients with connective tissue disease. CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY 1994; 1:71-7. [PMID: 7496926 PMCID: PMC368199 DOI: 10.1128/cdli.1.1.71-77.1994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The significance of the presence of antibodies to cytoskeleton proteins in patients with connective tissue diseases is not clear, as there is a high level of these antibodies in healthy controls. In an attempt to improve the visualization of the immunofluorescence binding pattern of autoantibodies to cytoskeletal structures in cultured fibroblasts, we have used confocal microscopy. Of the 256 serum samples tested, 155 (61%) WERE reactive with cytoplasmic structures. These reactive samples could be divided into seven patterns of binding, as determined by double-blind examination of single-section confocal images. While confirming the results of previous immunofluorescence studies which have shown that autoantibodies that bind to filamentous structures in the cytoplasm of cultured cells are common in patients with connective tissue diseases, we were able to identify three patterns of cytoskeletal binding which may be useful as an adjunct to other tests for the diagnosis of some connective tissue diseases, in particular systemic sclerosis (scleroderma) and rheumatoid arthritis/Sjogren's syndrome. None of the seven patterns was exclusive to a particular disease. We conclude that confocal microscopy may be of limited use as an adjunct to other serological assays in the diagnosis of some forms of connective tissue disease.
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Affiliation(s)
- P W French
- Centre for Immunology, St. Vincent's Hospital, New South Wales, Australia
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Wattiaux-De Coninck S, Wattiaux R. Ischemic effects on the structure and function of the plasma membrane. Subcell Biochem 1994; 22:361-402. [PMID: 8146887 DOI: 10.1007/978-1-4615-2401-4_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- S Wattiaux-De Coninck
- Laboratoire de Chimie Physiologique, Facultés Universitaires Notre-Dame de la Paix, Namur, Belgium
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Borg AA, Dawes PT, Mattey DL. Increased levels of IgA antibodies to cytokeratin-18 and epidermal keratin in rheumatoid arthritis. ARTHRITIS AND RHEUMATISM 1993; 36:229-33. [PMID: 7679272 DOI: 10.1002/art.1780360214] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
OBJECTIVE To investigate whether levels of antibodies to cytokeratin-18 (CK-18) and epidermal keratin (EPK) were raised in patients with rheumatoid arthritis (RA). METHODS We measured antibodies to CK-18 and EPK in patients with RA and in patients with osteoarthritis (OA), as well as in normal control subjects by means of an enzyme-linked immunosorbent assay. RESULTS IgA antibodies to both CK-18 and EPK were significantly increased in patients with RA compared with the controls and with patients with OA (P < 0.0001). No difference was noted in the levels of IgG or IgM antibodies to CK-18 or EPK between controls and patients with OA or RA. CONCLUSION Raised levels of IgA autoantibody to CK-18 and EPK may reflect damage to cytokeratin-containing cells (e.g., in synovial endothelium) and could be a useful disease marker in RA.
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Affiliation(s)
- A A Borg
- Staffordshire Rheumatology Centre, Stoke-On-Trent, United Kingdom
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