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Sasaki Y, Yoshino N, Okuwa T, Odagiri T, Satoh T, Muraki Y. A mouse monoclonal antibody against influenza C virus attenuates acetaminophen-induced liver injury in mice. Sci Rep 2021; 11:11816. [PMID: 34083649 PMCID: PMC8175586 DOI: 10.1038/s41598-021-91251-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 05/24/2021] [Indexed: 11/09/2022] Open
Abstract
Molecular mimicry is one of the main processes for producing autoantibodies during infections. Although some autoantibodies are associated with autoimmune diseases, the functions of many autoantibodies remain unknown. Previously, we reported that S16, a mouse (BALB/c) monoclonal antibody against the hemagglutinin-esterase fusion glycoprotein of influenza C virus, recognizes host proteins in some species of animals, but we could not succeed in identifying the proteins. In the present study, we found that S16 cross-reacted with acetyl-CoA acyltransferase 2 (ACAA2), which is expressed in the livers of BALB/c mice. ACAA2 was released into the serum after acetaminophen (APAP) administration, and its serum level correlated with serum alanine aminotransferase (ALT) activity. Furthermore, we observed that S16 injected into mice with APAP-induced hepatic injury prompted the formation of an immune complex between S16 and ACAA2 in the serum. The levels of serum ALT (p < 0.01) and necrotic areas in the liver (p < 0.01) were reduced in the S16-injected mice. These results suggest that S16 may have a mitigation function in response to APAP-induced hepatotoxicity. This study shows the therapeutic function of an autoantibody and suggests that an antibody against extracellular ACAA2 might be a candidate for treating APAP-induced hepatic injury.
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Affiliation(s)
- Yutaka Sasaki
- Division of Infectious Diseases and Immunology, Department of Microbiology, School of Medicine, Iwate Medical University, 1-1-1 Idaidori, Yahaba, Iwate, 028-3694, Japan
| | - Naoto Yoshino
- Division of Infectious Diseases and Immunology, Department of Microbiology, School of Medicine, Iwate Medical University, 1-1-1 Idaidori, Yahaba, Iwate, 028-3694, Japan
| | - Takako Okuwa
- Department of Microbiology, Kanazawa Medical University School of Medicine, Ishikawa, Japan
| | - Takashi Odagiri
- Division of Infectious Diseases and Immunology, Department of Microbiology, School of Medicine, Iwate Medical University, 1-1-1 Idaidori, Yahaba, Iwate, 028-3694, Japan
| | - Takashi Satoh
- Department of Pathology, School of Medicine, Iwate Medical University, Iwate, Japan
| | - Yasushi Muraki
- Division of Infectious Diseases and Immunology, Department of Microbiology, School of Medicine, Iwate Medical University, 1-1-1 Idaidori, Yahaba, Iwate, 028-3694, Japan.
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Xu J, Zhou X, Wang J, Li Z, Kong X, Qian J, Hu Y, Fang JY. RhoGAPs attenuate cell proliferation by direct interaction with p53 tetramerization domain. Cell Rep 2013; 3:1526-38. [PMID: 23684608 DOI: 10.1016/j.celrep.2013.04.017] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Revised: 03/13/2013] [Accepted: 04/21/2013] [Indexed: 12/15/2022] Open
Abstract
Many Rho GTPase activation proteins (RhoGAPs) are deleted or downregulated in cancers, but the functional consequences are still unclear. Here, we show that the RhoGAP ArhGAP11A induces cell-cycle arrest and apoptosis by binding to the tumor suppressor p53. The RhoGAP domain of ArhGAP11A binds to the tetramerization domain of p53, but not to its family members p63 or p73. The interaction stabilizes the tetrameric conformation of p53 and enhances its DNA-binding activity, thereby inducing cell-cycle arrest and apoptosis. Upon DNA damage stress, ArhGAP11A accumulates in the nucleus and interacts with p53, whereas knockdown of ArhGAP11A partially blocks p53 transcriptional activity. These findings explain why RhoGAPs are frequently deleted in cancers and suggest that the RhoGAP family sits at the crossroads between the cell-migration and proliferation pathways.
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Affiliation(s)
- Jie Xu
- State Key Laboratory for Oncogenes and Related Genes, Division of Gastroenterology and Hepatology, Renji Hospital, Shanghai Institute for Digestive Diseases, Shanghai Jiao-Tong University School of Medicine, Key Laboratory of Gastroenterology & Hepatology, Ministry of Health, 145 Middle Shandong Road, Shanghai 200001, China.
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Belizna C, Lartigue A, Favre J, Gilbert D, Tron F, Lévesque H, Thuillez C, Richard V. Antiphospholipid antibodies induce vascular functional changes in mice: a mechanism of vascular lesions in antiphospholipid syndrome? Lupus 2008; 17:185-94. [DOI: 10.1177/0961203307086931] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Abstract A premature atherosclerosis has been presumed in patients with antiphospholipid syndrome. The potential role of antiphospholipid antibodies in the development of atheroma is rather controversial. In this study, we tested the hypothesis that antiphospholipid antibodies could induce atherosclerosis via vascular functional changes. CD1 mice received one single injection of antiphospholipid monoclonal antibodies derived from male (BXSB × NZW) F1 mice with a lupus-like disease associated with an antiphospholipid syndrome and coronary artery disease. One week later, first-order mesenteric arteries (diameter 220–260 μm) were isolated and mounted on a small-vessel myograph for the measurement of the relaxation responses to acetylcholine or the NO donor nitroprusside after precontraction by phenylephrine. Five out of eight antiphospholipid monoclonal antibodies reduced the response to acetylcholine compared with control mice, and this effect was especially marked with one of them. No change in the response to nitroprusside was observed. The impairment was maintained after 3 weeks of treatment and appeared related to a moderate decrease in NO-mediated responses and a marked decrease in prostanoid-mediated relaxations. These vascular functional changes could be prevented by chronic treatment with statins or aspirin. These data could constitute additional elements supporting a direct pathogenic role of antiphospholipid antibodies. We suggest that a sub-population of these autoantibodies could be responsible for the endothelial dysfunction observed in antiphospholipid syndrome.
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Affiliation(s)
- C Belizna
- INSERM U644 and Institute for Biomedical Research, IFRMP 23, Rouen University Medical School, Rouen Cedex, France; Department of Internal Medicine, Rouen University Hospital, Rouen Cedex, France
| | - A Lartigue
- INSERM U519 and Institute for Biomedical Research, IFRMP 23, Rouen University Medical School, Rouen Cedex, France
| | - J Favre
- INSERM U644 and Institute for Biomedical Research, IFRMP 23, Rouen University Medical School, Rouen Cedex, France
| | - D Gilbert
- INSERM U519 and Institute for Biomedical Research, IFRMP 23, Rouen University Medical School, Rouen Cedex, France
| | - F Tron
- INSERM U519 and Institute for Biomedical Research, IFRMP 23, Rouen University Medical School, Rouen Cedex, France
| | - H Lévesque
- INSERM U644 and Institute for Biomedical Research, IFRMP 23, Rouen University Medical School, Rouen Cedex, France; Department of Internal Medicine, Rouen University Hospital, Rouen Cedex, France
| | - C Thuillez
- INSERM U644 and Institute for Biomedical Research, IFRMP 23, Rouen University Medical School, Rouen Cedex, France
| | - V Richard
- INSERM U644 and Institute for Biomedical Research, IFRMP 23, Rouen University Medical School, Rouen Cedex, France
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Lartigue A, Drouot L, Jouen F, Charlionet R, Tron F, Gilbert D. Association between anti-nucleophosmin and anti-cardiolipin antibodies in (NZW x BXSB)F1 mice and human systemic lupus erythematosus. Arthritis Res Ther 2005; 7:R1394-403. [PMID: 16277692 PMCID: PMC1297587 DOI: 10.1186/ar1838] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2005] [Revised: 08/11/2005] [Accepted: 09/09/2005] [Indexed: 11/10/2022] Open
Abstract
We showed previously that nucleophosmin (NPM), a nucleolar phosphoprotein, is recognized by sera from (NZW x BXSB)F1 (WB) mice, a model of systemic lupus erythematosus (SLE) and anti-phospholipid syndrome. In the present study we analysed the prevalence and kinetics of anti-NPM autoantibodies in WB mice by a solid-phase ELISA with recombinant human (rh) NPM as the antigen and showed that most male WB mouse sera had anti-NPM antibodies that were responsible for their indirect immunofluorescence staining pattern on Hep-2 cells. Anti-NPM antibodies were significantly associated with anti-cardiolipin (aCL) antibodies. This antibody profile mirrored that observed in certain human SLE sera because anti-NPM antibodies were detected in 28% of the sera from patients with SLE and were similarly associated with aCL antibodies. The demonstration that rhNPM bound to cardiolipin (CL) in vitro and increased the CL-binding activity of a WB-derived aCL monoclonal antibody indicates that NPM can interact with CL to form SLE-related immunogenic particles that might be responsible for the concomitant production of anti-NPM and aCL antibodies.
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Affiliation(s)
- Aurelia Lartigue
- INSERM U519 and Institut Fédératif de Recherche Multidisciplinaire sur les Peptides, Faculté de Médecine et Pharmacie, 22 boulevard Gambetta, 76183 Rouen Cedex, France
| | - Laurent Drouot
- INSERM U519 and Institut Fédératif de Recherche Multidisciplinaire sur les Peptides, Faculté de Médecine et Pharmacie, 22 boulevard Gambetta, 76183 Rouen Cedex, France
| | - Fabienne Jouen
- Laboratoire d'Immunopathologie Clinique et Expérimentale, CHU de Rouen, 1 rue de Germont, 76000, Rouen cedex, France
| | - Roland Charlionet
- INSERM U519 and Institut Fédératif de Recherche Multidisciplinaire sur les Peptides, Faculté de Médecine et Pharmacie, 22 boulevard Gambetta, 76183 Rouen Cedex, France
| | - François Tron
- INSERM U519 and Institut Fédératif de Recherche Multidisciplinaire sur les Peptides, Faculté de Médecine et Pharmacie, 22 boulevard Gambetta, 76183 Rouen Cedex, France
- Laboratoire d'Immunopathologie Clinique et Expérimentale, CHU de Rouen, 1 rue de Germont, 76000, Rouen cedex, France
| | - Danièle Gilbert
- INSERM U519 and Institut Fédératif de Recherche Multidisciplinaire sur les Peptides, Faculté de Médecine et Pharmacie, 22 boulevard Gambetta, 76183 Rouen Cedex, France
- Laboratoire d'Immunopathologie Clinique et Expérimentale, CHU de Rouen, 1 rue de Germont, 76000, Rouen cedex, France
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Machour N, Gilbert D, Vittecoq O, Costa O, Tron F, Charlionet R. Protéomique et auto-anticorps. Med Sci (Paris) 2005; 21:759-64. [PMID: 16115463 DOI: 10.1051/medsci/2005218-9759] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Autoimmune response is diverse. This diversity is thought not to take place at the beginning of the autoimmune process but to occur as the disease evolves. It is mainly the consequence of the so-called epitope-spreading phenomenon and of the cross-reactivity of antibodies. Analysing autoantibody repertoire constitutes a powerful means to understand physiopathological processes at work in various diseases, mainly autoimmune diseases. In particular this analysis opens the way to precisely identify autoantigens and their changes in various pathological situations, and allows providing new biological markers in chronic inflammatory diseases. New methodologies have recently emerged for the analysis of the autoantibody repertoire in a given individual. They propose diagnostic approaches no more related upon few markers but founded upon analysis of global changes of the antibody repertoire. They belong to methodologies called target-oriented proteomics. Their common feature is to isolate autoantigens by means of affinity chromatography based upon antibody/antigen reactions. Autoantibodies to be studied interact with a protein substratum susceptible to include autoantibody targets. These interactions take place on solid macro- or microsurfaces, i.e. membrane filters or chips. Several strategies can be used for locating the specific autoantibody/autoantigen complexes and for identifying behind autoantigens. In this paper three approaches, namely, the recombinant protein chips, the SELDI techniques and the 2-D gel electrophoresis linked to mass spectrometry are described and compared.
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Affiliation(s)
- Nadine Machour
- INSERM U.519, Faculté de médecine-pharmacie, 22 boulevard Gambetta, 76183 Rouen Cedex, France
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Abstract
A hallmark of systemic lupus erythematosus (SLE) and related autoimmune diseases such as the antiphospholipid syndrome (APL or Hughes syndrome) is an apparent breakdown in tolerance, the process by which the body distinguishes self from nonself in order to maintain a versatile immune defense while protecting itself from self-annihilation. To some extent, loss of tolerance is a desirable feature of host immunity, and is known to occur in healthy individuals. Optimal tolerance then is probably not an all or nothing phenomenon. Autoimmunity should be seen as a breakdown in homeostasis rather than a completely aberrant kind of immunity. This leads to special considerations in the assessment of potentially toleragenic therapies, in which an attempt is made to re-educate the immune system. LJP 1082 is designed as a polyvalent antigenic structure aimed at crosslinking specific surface immunoglobulin and tolerizing B cells to beta2-glycoprotein I. Issues of antigenic selection and multiplex forces influencing tolerance and immunity may have impact on its optimal development and use in patients.
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Affiliation(s)
- J T Merrill
- Clinical Pharmacology Research Program, Oklahoma Medical Research Foundation, Oklahoma City 73104, USA.
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Thébault S, Gilbert D, Hubert M, Drouot L, Machour N, Lange C, Charlionet R, Tron F. Orderly Pattern of Development of the Autoantibody Response in (New Zealand White × BXSB)F1 Lupus Mice: Characterization of Target Antigens and Antigen Spreading by Two-Dimensional Gel Electrophoresis and Mass Spectrometry. THE JOURNAL OF IMMUNOLOGY 2002; 169:4046-53. [PMID: 12244208 DOI: 10.4049/jimmunol.169.7.4046] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Immunoblots of a two-dimensional PAGE-separated HL-60 cell proteomic map and mass spectrometry were combined to characterize proteins targeted by autoantibodies produced by male (New Zealand White x BXSB)F(1) (WB) mice that develop lupus and anti-phospholipid syndrome. Analysis of sera sequentially obtained from seven individual mice at different ages showed that six proteins, vimentin, heat shock protein 60, UV excision-repair protein RAD23, alpha-enolase, heterogeneous nuclear ribonucleoprotein L, and nucleophosmin, were the targets of the B cell autoimmune response, and that autoantibodies to them were synthesized sequentially in an orderly pattern that recurred in all the male WB mice analyzed: anti-vimentin first and anti-nucleophosmin last, with anti-RAD23 and anti-heat shock protein 60, then anti-alpha-enolase and anti-heterogeneous nuclear ribonucleoprotein L Abs occuring concomitantly. Anti-vimentin reactivity always appeared before anti-cardiolipin and anti-DNA Abs, suggesting that vimentin is the immunogen initiating the autoimmune process. The pattern of HL-60 proteins recognized by female WB sera differed from that of male sera, indicating that the Y chromosome-linked autoimmune acceleration gene is not an accelerator but a strong modifier of the autoimmune response. Thus, 1) combining two-dimensional PAGE and mass spectrometry constitutes a powerful tool to identify the set of Ags bound by autoantibodies present in a single serum and the whole autoantibody pattern of an autoimmune disease; 2) the diversification of the autoimmune response in male WB mice occurs in a predetermined pattern consistent with Ag spreading, and thus provides a useful model to further our understanding of the development of the autoantibody response in lupus.
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Affiliation(s)
- Sandrine Thébault
- Institut de la Santé et de la Recherche Médicale Unité 519, Faculté de Médecine et de Pharmacie, Hôpital Charles-Nicolle, Rouen, France
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Saulot V, Vittecoq O, Charlionet R, Fardellone P, Lange C, Marvin L, Machour N, Le Loët X, Gilbert D, Tron F. Presence of autoantibodies to the glycolytic enzyme alpha-enolase in sera from patients with early rheumatoid arthritis. ARTHRITIS AND RHEUMATISM 2002; 46:1196-201. [PMID: 12115223 DOI: 10.1002/art.10252] [Citation(s) in RCA: 129] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To identify a new autoantigen/autoantibody population in rheumatoid arthritis (RA) sera. METHODS Following a population-based recruitment effort, 255 patients with very early arthritis (median disease duration 4 months) were studied using different clinical, biologic, and radiologic assessments. After a followup period of 1 year, patients were classified as having RA (n = 145), non-RA rheumatic diseases (n = 70), and undifferentiated arthritis (n = 40). Patients' sera were analyzed by one-dimensional (1D) and 2D Western blotting. The recognized 50-kd protein was analyzed by matrix-assisted laser desorption ionization-time-of-flight (MALDI-TOF) mass spectrometry (MS). RA serum reactivities were evaluated against the recombinant protein synthesized by an in vitro coupled transcription-translation system. RESULTS On 1D Western blots, 36 of the 145 RA sera bound to a 50-kd polypeptide. On 2D Western blots, anti-50-kd+ RA sera recognized a triplet of isoelectric point 6.5-7.0 and a molecular mass of 50 kd. The 3 spots of the triplet were analyzed by MALDI-TOF MS and were shown to correspond to human alpha-enolase. A goat anti-enolase antiserum, which recognized a band comigrating with the 50-kd antigen on 1D Western blots, gave a labeling pattern on 2D Western blots similar to that observed with anti-50-kd+ RA sera. Among the 36 RA sera that identified alpha-enolase in protein maps, only 8 recognized the recombinant (unmodified) alpha-enolase. The specificity of anti-alpha -enolase antibodies for RA was 97.1%. Half of the anti-alpha -enolase-positive RA patients were negative for both rheumatoid factor and antifilaggrin antibodies. The presence of anti-alpha-enolase antibodies was the greatest predictive factor of radiologic progression in the first 66 RA patients included. CONCLUSION Autoantibodies to alpha-enolase, an enzyme of the glycolytic pathway, are present in the sera of patients with very early RA and have potential diagnostic and prognostic value for RA.
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Affiliation(s)
- Vincent Saulot
- Institut National de la Santé et de la Recherche Médicale, Rouen, France
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Vilain S, Cosette P, Charlionet R, Hubert M, Lange C, Junter GA, Jouenne T. Substituting Coomassie Brilliant Blue for bromophenol blue in two-dimensional electrophoresis buffers improves the resolution of focusing patterns. Electrophoresis 2001; 22:4368-74. [PMID: 11824604 DOI: 10.1002/1522-2683(200112)22:20<4368::aid-elps4368>3.0.co;2-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In a new area of postgenomics challenges, the optimization of protein identification has become a central goal in microbiochemistry. In this work, we demonstrate that the substitution of Coomassie Brilliant Blue for bromophenol blue in two-dimensional electrophoresis (2-DE) buffers improves the focusing of whole proteins from Pseudomonas aeruginosa. This improvement of focusing concerns more particularly basic proteins. This enhancement may be attributed to a better transfer from the first to the second dimension, which probably highlights an increase in the solubility of proteins in the IPG strips. Hence, the use of an efficient tracking dye in the 2-DE buffers may enlarge protein recovery on proteome maps.
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Affiliation(s)
- S Vilain
- UMR 6522 CNRS, Faculté des Sciences de Rouen, Mont-Saint-Aignan, France
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Current awareness. JOURNAL OF MASS SPECTROMETRY : JMS 2000; 35:1363-1374. [PMID: 11114097 DOI: 10.1002/1096-9888(200011)35:11<1363::aid-jms984>3.0.co;2-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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