1
|
Mohamad S, Salim M, Crampes C, Claverol S, Jurdi N, Clofent-Sanchez G, El Hajj Dib I, Jacobin-Valat MJ. Atherosclerosis and recurrent pregnancy losses: Common biomarkers involved? Atherosclerosis 2022. [DOI: 10.1016/j.atherosclerosis.2022.06.377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
2
|
Brevier J, Gerbaud E, Borowczyk C, Grevelinger J, Laroche-Traineau J, Marais S, Jacobin-Valat MJ, Clofent-Sanchez G, Ottones F. Distinct functional phenotypes between major models of foamy macrophages: Consequences and impact in the field of therapeutic research. Atherosclerosis 2022. [DOI: 10.1016/j.atherosclerosis.2022.06.267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
3
|
Hemadou A, Fontayne A, Laroche-Traineau J, Ottones F, Mondon P, Claverol S, Ducasse É, Sanchez S, Mohamad S, Lorenzato C, Duonor-Cerutti M, Clofent-Sanchez G, Jacobin-Valat MJ. In Vivo Human Single-Chain Fragment Variable Phage Display-Assisted Identification of Galectin-3 as a New Biomarker of Atherosclerosis. J Am Heart Assoc 2021; 10:e016287. [PMID: 34569248 PMCID: PMC8649142 DOI: 10.1161/jaha.120.016287] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Background Atherosclerosis is a complex pathology in which dysfunctional endothelium, activated leucocytes, macrophages, and lipid‐laden foam cells are implicated, and in which plaque disruption is driven by many putative actors. This study aimed to identify accurate targetable biomarkers using new in vivo approaches to propose tools for improved diagnosis and treatment. Methods and Results Human scFv (single‐chain fragment variable) selected by in vivo phage display in a rabbit model of atherosclerosis was reformatted as scFv fused to the scFv‐Fc (single‐chain fragment variable fused to the crystallizable fragment of immunoglobulin G format) antibodies. Their reactivity was tested using flow cytometry and immunoassays, and aorta sections from animal models and human carotid and coronary artery specimens. A pool of atherosclerotic proteins from human endarterectomies was co‐immunoprecipitated with the selected scFv‐Fc followed by mass spectrometry for target identification. Near‐infrared fluorescence imaging was performed in Apoe−/− mice after injection of an Alexa Fluor 647–labeled scFv‐Fc‐2c antibody produced in a baculovirus system with 2 additional cysteine residues (ie, 2c) for future coupling to nano‐objects for theranostic applications. One scFv‐Fc clone (P3) displayed the highest cross‐reactivity against atherosclerotic lesion sections (rabbit, mouse, and human) and was chosen for translational development. Mass spectrometry identified galectin‐3, a β‐galactoside‐binding lectin, as the leader target. ELISA and immunofluorescence assays with a commercial anti‐galectin‐3 antibody confirmed this specificity. P3 scFv‐Fc‐2c specifically targeted atherosclerotic plaques in the Apoe−/− mouse model. Conclusions These results provide evidence that the P3 antibody holds great promise for molecular imaging of atherosclerosis and other inflammatory pathologies involving macrophages. Recently, galectin‐3 was proposed as a high‐value biomarker for the assessment of coronary and carotid atherosclerosis.
Collapse
Affiliation(s)
- Audrey Hemadou
- CRMSB (Centre de Resonance Magnétique des Systèmes Biologiques)UMR5536 CNRS (Centre National de Recherche Scientifique)INSB (Institut National des Sciences Biologiques) Bordeaux France
| | - Alexandre Fontayne
- LFB (Laboratoire Français de Fractionnement et de Biotechnologies) Biotechnologies Lille France.,BE4S (Bio-Experts for Success) Croix France
| | - Jeanny Laroche-Traineau
- CRMSB (Centre de Resonance Magnétique des Systèmes Biologiques)UMR5536 CNRS (Centre National de Recherche Scientifique)INSB (Institut National des Sciences Biologiques) Bordeaux France
| | - Florence Ottones
- CRMSB (Centre de Resonance Magnétique des Systèmes Biologiques)UMR5536 CNRS (Centre National de Recherche Scientifique)INSB (Institut National des Sciences Biologiques) Bordeaux France
| | - Philippe Mondon
- LFB (Laboratoire Français de Fractionnement et de Biotechnologies) Biotechnologies Lille France
| | - Stéphane Claverol
- Protéome Pole CGFB (Centre de Génomique Fonctionnelle de Bordeaux) Bordeaux France
| | | | - Stéphane Sanchez
- CRMSB (Centre de Resonance Magnétique des Systèmes Biologiques)UMR5536 CNRS (Centre National de Recherche Scientifique)INSB (Institut National des Sciences Biologiques) Bordeaux France
| | - Sarah Mohamad
- CRMSB (Centre de Resonance Magnétique des Systèmes Biologiques)UMR5536 CNRS (Centre National de Recherche Scientifique)INSB (Institut National des Sciences Biologiques) Bordeaux France
| | - Cyril Lorenzato
- CRMSB (Centre de Resonance Magnétique des Systèmes Biologiques)UMR5536 CNRS (Centre National de Recherche Scientifique)INSB (Institut National des Sciences Biologiques) Bordeaux France
| | | | - Gisèle Clofent-Sanchez
- CRMSB (Centre de Resonance Magnétique des Systèmes Biologiques)UMR5536 CNRS (Centre National de Recherche Scientifique)INSB (Institut National des Sciences Biologiques) Bordeaux France
| | - Marie-Josée Jacobin-Valat
- CRMSB (Centre de Resonance Magnétique des Systèmes Biologiques)UMR5536 CNRS (Centre National de Recherche Scientifique)INSB (Institut National des Sciences Biologiques) Bordeaux France
| |
Collapse
|
4
|
Borowczyk C, Laroche-Traineau J, Grevelinger J, Rossignol A, Jacobin-Valat MJ, Clofent-Sanchez G, Ottones F. The specific optical properties of foamy macrophages may be due to their specific metabolism AND/OR lipid handling. Atherosclerosis 2021. [DOI: 10.1016/j.atherosclerosis.2021.06.325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
5
|
Bonnet S, Prévot G, Mornet S, Jacobin-Valat MJ, Mousli Y, Hemadou A, Duttine M, Trotier A, Sanchez S, Duonor-Cérutti M, Crauste-Manciet S, Clofent-Sanchez G. A Nano-Emulsion Platform Functionalized with a Fully Human scFv-Fc Antibody for Atheroma Targeting: Towards a Theranostic Approach to Atherosclerosis. Int J Mol Sci 2021; 22:ijms22105188. [PMID: 34068875 PMCID: PMC8153629 DOI: 10.3390/ijms22105188] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 05/08/2021] [Accepted: 05/09/2021] [Indexed: 12/12/2022] Open
Abstract
Atherosclerosis is at the onset of the cardiovascular diseases that are among the leading causes of death worldwide. Currently, high-risk plaques, also called vulnerable atheromatous plaques, remain often undiagnosed until the occurrence of severe complications, such as stroke or myocardial infarction. Molecular imaging agents that target high-risk atheromatous lesions could greatly improve the diagnosis of atherosclerosis by identifying sites of high disease activity. Moreover, a "theranostic approach" that combines molecular imaging agents (for diagnosis) and therapeutic molecules would be of great value for the local management of atheromatous plaques. The aim of this study was to develop and characterize an innovative theranostic tool for atherosclerosis. We engineered oil-in-water nano-emulsions (NEs) loaded with superparamagnetic iron oxide (SPIO) nanoparticles for magnetic resonance imaging (MRI) purposes. Dynamic MRI showed that NE-SPIO nanoparticles decorated with a polyethylene glycol (PEG) layer reduced their liver uptake and extended their half-life. Next, the NE-SPIO-PEG formulation was functionalized with a fully human scFv-Fc antibody (P3) recognizing galectin 3, an atherosclerosis biomarker. The P3-functionalized formulation targeted atheromatous plaques, as demonstrated in an immunohistochemistry analyses of mouse aorta and human artery sections and in an Apoe-/- mouse model of atherosclerosis. Moreover, the formulation was loaded with SPIO nanoparticles and/or alpha-tocopherol to be used as a theranostic tool for atherosclerosis imaging (SPIO) and for delivery of drugs that reduce oxidation (here, alpha-tocopherol) in atheromatous plaques. This study paves the way to non-invasive targeted imaging of atherosclerosis and synergistic therapeutic applications.
Collapse
Affiliation(s)
- Samuel Bonnet
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université de Bordeaux, CRMSB, 33076 Bordeaux, France; (M.-J.J.-V.); (A.H.); (A.T.); (S.S.); (G.C.-S.)
- Institut de Chimie de la Matière Condensée, CNRS UMR 5026, Université de Bordeaux, Bordeaux INP, ICMCB, 33600 Pessac, France; (S.M.); (M.D.)
- Correspondence:
| | - Geoffrey Prévot
- ARNA, ARN, Régulations Naturelle et Artificielle, ChemBioPharm, INSERM U1212, CNRS UMR 5320, Université de Bordeaux, 33076 Bordeaux, France; (G.P.); (Y.M.); (S.C.-M.)
| | - Stéphane Mornet
- Institut de Chimie de la Matière Condensée, CNRS UMR 5026, Université de Bordeaux, Bordeaux INP, ICMCB, 33600 Pessac, France; (S.M.); (M.D.)
| | - Marie-Josée Jacobin-Valat
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université de Bordeaux, CRMSB, 33076 Bordeaux, France; (M.-J.J.-V.); (A.H.); (A.T.); (S.S.); (G.C.-S.)
| | - Yannick Mousli
- ARNA, ARN, Régulations Naturelle et Artificielle, ChemBioPharm, INSERM U1212, CNRS UMR 5320, Université de Bordeaux, 33076 Bordeaux, France; (G.P.); (Y.M.); (S.C.-M.)
| | - Audrey Hemadou
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université de Bordeaux, CRMSB, 33076 Bordeaux, France; (M.-J.J.-V.); (A.H.); (A.T.); (S.S.); (G.C.-S.)
| | - Mathieu Duttine
- Institut de Chimie de la Matière Condensée, CNRS UMR 5026, Université de Bordeaux, Bordeaux INP, ICMCB, 33600 Pessac, France; (S.M.); (M.D.)
| | - Aurélien Trotier
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université de Bordeaux, CRMSB, 33076 Bordeaux, France; (M.-J.J.-V.); (A.H.); (A.T.); (S.S.); (G.C.-S.)
| | - Stéphane Sanchez
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université de Bordeaux, CRMSB, 33076 Bordeaux, France; (M.-J.J.-V.); (A.H.); (A.T.); (S.S.); (G.C.-S.)
| | | | - Sylvie Crauste-Manciet
- ARNA, ARN, Régulations Naturelle et Artificielle, ChemBioPharm, INSERM U1212, CNRS UMR 5320, Université de Bordeaux, 33076 Bordeaux, France; (G.P.); (Y.M.); (S.C.-M.)
| | - Gisèle Clofent-Sanchez
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université de Bordeaux, CRMSB, 33076 Bordeaux, France; (M.-J.J.-V.); (A.H.); (A.T.); (S.S.); (G.C.-S.)
| |
Collapse
|
6
|
Borowczyk C, Laroche-Traineau J, Brevier J, Jacobin-Valat MJ, Marais S, Gerbaud E, Clofent-Sanchez G, Ottones F. Two-photon excited fluorescence (TPEF) may be useful to identify macrophage subsets based on their metabolic activity and cellular responses in atherosclerotic plaques. Atherosclerosis 2020; 309:47-55. [PMID: 32871394 DOI: 10.1016/j.atherosclerosis.2020.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 07/10/2020] [Accepted: 07/16/2020] [Indexed: 11/18/2022]
Abstract
BACKGROUND AND AIMS Atherosclerosis is characterized by the formation of lipid plaques within the arterial wall. In such plaques, the massive and continuous recruitment of circulating monocyte-derived macrophages induces inflammation, leading to plaque destabilization and rupture. Plaque vulnerability is linked to the presence of (i) a large lipid core that contains necrotic, "foamy" macrophages (FMs), (ii) a thin fibrous cap that cannot limit the prothrombotic lipid core, and potentially (iii) an imbalance between inflammatory and immunoregulatory macrophages. These opposite macrophage functions rely on the use of different energy pathways (glycolysis and oxidative phosphorylation, respectively) that may lead to different levels of the auto-fluorescent cofactors nicotinamide adenine dinucleotide (NADH) and flavin adenine dinucleotide (FAD). We hypothesized that high-resolution two-photon excited autofluorescence (TPEF) imaging of these cofactors may be used to monitor the metabolic activity and cellular responses of macrophages in atherosclerotic plaques. METHODS Different models of human FMs were generated by exposure to acetylated or oxidized low-density lipoproteins (LDL), with/without human carotid extract (CE). Their phenotype and optical properties were compared with those of extremely polarized macrophages, inflammatory M1 (MLPS+IFNγ) and immunoregulatory M2 (MIL4+IL13). RESULTS These FM models displayed an intermediate phenotype with low levels of M1 and M2 "specific" markers. Moreover, the NADH and FAD autofluorescence profiles of FMoxLDL ± CE cells were significantly distinct from those of M1 and M2 macrophages. CONCLUSIONS TPEF imaging may be useful to follow the metabolic activity and cellular responses of the different macrophage subtypes present in atherosclerotic plaques in order to detect vulnerable areas.
Collapse
Affiliation(s)
| | | | | | | | | | - Edouard Gerbaud
- Centre de Recherche Cardio Thoracique, INSERM U 1045, Bordeaux, France
| | | | | |
Collapse
|
7
|
Larivière M, Bonnet S, Lorenzato C, Laroche-Traineau J, Ottonès F, Jacobin-Valat MJ, Clofent-Sanchez G. Recent Advances in the Molecular Imaging of Atherosclerosis. Semin Thromb Hemost 2020; 46:563-586. [PMID: 32604420 DOI: 10.1055/s-0039-1701019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Atherosclerosis is the major underlying cause of cardiovascular diseases, the prevalence of which is continuously increasing, thus currently standing as the leading global cause of death. This pathology gradually develops over the course of 50 or more years throughout the life of an individual under the influence of a vast number of factors, both environmental and pathophysiological. This wealth of factors has elicited much research into molecular imaging, with purely diagnostic purposes or with the hope of engineering an efficient theranostic tool. To these ends, diverse nanomaterials with desirable, tunable properties have been explored by different teams, as described in this review.
Collapse
Affiliation(s)
| | - Samuel Bonnet
- Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536, CNRS/Universite de Bordeaux, Bordeaux, France
| | - Cyril Lorenzato
- Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536, CNRS/Universite de Bordeaux, Bordeaux, France
| | - Jeanny Laroche-Traineau
- Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536, CNRS/Universite de Bordeaux, Bordeaux, France
| | - Florence Ottonès
- Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536, CNRS/Universite de Bordeaux, Bordeaux, France
| | - Marie-Josée Jacobin-Valat
- Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536, CNRS/Universite de Bordeaux, Bordeaux, France
| | - Gisèle Clofent-Sanchez
- Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536, CNRS/Universite de Bordeaux, Bordeaux, France
| |
Collapse
|
8
|
Jacobin-Valat M, Hemadou A, Fontayne A, Lorenzato C, Laroche-Traineau J, Mondon P, Claverol S, Ducasse E, Sanchez S, Ottones F, Duonor-Cerutti M, Clofent-Sanchez G. In Vivo Human Scfv Phage Display Assisted Identification Of Galectin-3 As A New Biomarker For Atherosclerosis. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
9
|
Ottones F, Borowczyk C, Laroche-Traineau J, Brevier J, Louradour F, Bouzier-Sore A, Gerbeaud E, Jacobin-Valat M, Clofent-Sanchez G. Autofluorescent Intracellular Nadh And Fad May Be Used As Biomarkers Of The Vulnerability Of The Atheromatous Plaque. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
10
|
Macchi L, Clofent-Sanchez G, Marit G, Bihour C, Durrieu-Jais C, Besse P, Nurden P, Nurden AT. PAICA: A Method for Characterizing Platelet-Associated Antibodies - Its Application to the Study of Idiopathic Thrombocytopenic Purpura and to the Detection of Platelet-bound c7E3. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1650702] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
SummaryIn idiopathic thrombocytopenic purpura (ITP), autoantibodies reacting with antigens on the platelet membrane bring about accelerated platelet destruction. We now report PAICA (“Platelet-Associated IgG Characterization Assay”), a method for detecting autoantibodies bound to specific membrane glycoproteins in total platelet lysates. This monoclonal antibody (MAb) capture assay takes into account the fact that antibodies on circulating platelets may be translocated to internal pools as well as being on the surface. A total of twenty ITP patients were examined by PAICA, and the results compared with those obtained by measuring (i) serum antibodies bound to paraformaldehyde-fixed control platelets by ELISA, (ii) IgG bound to the surface of the patient’s own platelets by flow cytometry (PSIgG), (iii) total platelet-associated IgG (PAIgG) by ELISA and (iv) serum antibodies reacting with control platelets by MAIPA (“Monoclonal Antibody-specific Immobilization of Platelet Antigens”). Of twelve patients with elevated PAIgG, nine had increased PSIgG yet eleven reacted positively in PAICA. Of these, eight possessed antibodies directed against GP Ilb-IIIa, two against GP Ib-IX and one patient possessed antibodies directed against GP Ilb-IIIa and GP Ia-IIa respectively. Only seven of the patients possessed serum antibodies detectable by MAIPA. PAICA was also able to detect platelet-associated c7E3 (the chimeric form of Fab fragments of the MAb 7E3) following its infusion during antithrombotic therapy, when it proved more sensitive over a seven-day period than a MAIPA assay adapted for assessing surface-bound antibody. We propose that PAICA provides added sensitivity to the detection of platelet-associated antibodies in immune thrombocytopenias or following therapy with humanized MAbs.
Collapse
Affiliation(s)
- Laurent Macchi
- The UMR 5533 CNRS, Institut Fédératif “Coeur-Vaisseaux-Thrombose”, Hôpital Cardiologique, Pessac, France
| | - Gisèle Clofent-Sanchez
- The UMR 5533 CNRS, Institut Fédératif “Coeur-Vaisseaux-Thrombose”, Hôpital Cardiologique, Pessac, France
| | - Gérald Marit
- Service des Maladies du Sang, Centre François Magendie, Hôpital du Haut-Lévèque, Pessac, France
| | - Claude Bihour
- The UMR 5533 CNRS, Institut Fédératif “Coeur-Vaisseaux-Thrombose”, Hôpital Cardiologique, Pessac, France
| | | | - Pierre Besse
- Unité de Soins Intensifs, Hôpital Cardiologique, Pessac, France
| | - Paquita Nurden
- The UMR 5533 CNRS, Institut Fédératif “Coeur-Vaisseaux-Thrombose”, Hôpital Cardiologique, Pessac, France
| | - Alan T Nurden
- The UMR 5533 CNRS, Institut Fédératif “Coeur-Vaisseaux-Thrombose”, Hôpital Cardiologique, Pessac, France
| |
Collapse
|
11
|
Pourtau L, Sellal JM, Lacroix R, Poncelet P, Bernus O, Clofent-Sanchez G, Hocini M, Haïssaguerre M, Dignat-George F, Sacher F, Nurden P. Platelet function and microparticle levels in atrial fibrillation: Changes during the acute episode. Int J Cardiol 2018; 243:216-222. [PMID: 28747025 DOI: 10.1016/j.ijcard.2017.03.068] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 03/08/2017] [Accepted: 03/10/2017] [Indexed: 11/24/2022]
Abstract
BACKGROUND Thrombotic risk constitutes a major complication of atrial fibrillation (AF). Platelets and microparticles (MPs) are important for hemostasis and thrombosis, however their participation during AF is not well known. The aim of this study was to characterize platelet function and MPs procoagulant and fibrinolytic activity in AF patients and to determine the effects of an acute-AF episode. METHODS Blood was collected from paroxysmal (21) and persistent (16) AF patients referred for AF catheter ablation. Ten patients in sinus rhythm for 10days were induced in AF allowing comparisons of left atrium samples before and after induction. Platelet aggregation with ADP, TRAP, collagen, and ristocetin was studied. Platelet surface expression of PAR-1, αIIbβ3, GPIb and P-selectin were evaluated by flow cytometry, and MPs-associated procoagulant and fibrinolytic activity levels were determined by functional assays. RESULTS A specific reduction in platelet aggregation to TRAP, activating the thrombin receptor PAR-1, was found in all AF patients. No differences in platelet receptor expression were found. Yet, after acute-induced AF, the platelet response was improved. Furthermore, a significant decrease of left atrium tissue factor-dependent procoagulant activity of MPs was observed. CONCLUSION Acute episodes of AF results in a decrease in MPs-associated tissue factor activity, possibly corresponding to consumption, which in turn favors coagulation and the local production of thrombin. A decreased platelet basal aggregation to TRAP may result from PAR1 desensitization, whereas the improved response after an induced episode of AF suggests activation of coagulation and PAR1 re-sensitization.
Collapse
Affiliation(s)
- Line Pourtau
- IHU Liryc, Electrophysiology and Heart Modeling Institute, fondation Bordeaux Université, 33600, Pessac, France; Univ. Bordeaux, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, 33000 Bordeaux, France; INSERM, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, 33000 Bordeaux, France.
| | - Jean Marc Sellal
- IHU Liryc, Electrophysiology and Heart Modeling Institute, fondation Bordeaux Université, 33600, Pessac, France; Bordeaux University Hospital (CHU), Electrophysiology and Ablation Unit, 33600 Pessac, France; Centre Hospitalier Régional Universitaire (CHRU) de Nancy, département de cardiologie, 54500 Vandœuvre-lès-Nancy, France.
| | - Romaric Lacroix
- VRCM, UMR-S1076, Aix -Marseille Université, INSERM, UFR de Pharmacie, 13385 Marseille, France; Department of Haematology and Vascular Biology, CHU Conception, AP-HM, 13385 Marseille, France.
| | - Philippe Poncelet
- Research & Technology Department, BioCytex, 13010 Marseille, France.
| | - Olivier Bernus
- IHU Liryc, Electrophysiology and Heart Modeling Institute, fondation Bordeaux Université, 33600, Pessac, France; Univ. Bordeaux, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, 33000 Bordeaux, France; INSERM, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, 33000 Bordeaux, France.
| | - Gisèle Clofent-Sanchez
- Univ Bordeaux, CNRS, Centre de Résonance Magnétique des Systèmes Biologiques, U5536, 33076 Bordeaux, France.
| | - Mélèze Hocini
- IHU Liryc, Electrophysiology and Heart Modeling Institute, fondation Bordeaux Université, 33600, Pessac, France; Univ. Bordeaux, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, 33000 Bordeaux, France; INSERM, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, 33000 Bordeaux, France; Bordeaux University Hospital (CHU), Electrophysiology and Ablation Unit, 33600 Pessac, France.
| | - Michel Haïssaguerre
- IHU Liryc, Electrophysiology and Heart Modeling Institute, fondation Bordeaux Université, 33600, Pessac, France; Univ. Bordeaux, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, 33000 Bordeaux, France; INSERM, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, 33000 Bordeaux, France; Bordeaux University Hospital (CHU), Electrophysiology and Ablation Unit, 33600 Pessac, France.
| | - Françoise Dignat-George
- VRCM, UMR-S1076, Aix -Marseille Université, INSERM, UFR de Pharmacie, 13385 Marseille, France; Department of Haematology and Vascular Biology, CHU Conception, AP-HM, 13385 Marseille, France.
| | - Frédéric Sacher
- IHU Liryc, Electrophysiology and Heart Modeling Institute, fondation Bordeaux Université, 33600, Pessac, France; Univ. Bordeaux, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, 33000 Bordeaux, France; INSERM, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, 33000 Bordeaux, France; Bordeaux University Hospital (CHU), Electrophysiology and Ablation Unit, 33600 Pessac, France.
| | - Paquita Nurden
- IHU Liryc, Electrophysiology and Heart Modeling Institute, fondation Bordeaux Université, 33600, Pessac, France.
| |
Collapse
|
12
|
Hemadou A, Giudicelli V, Smith ML, Lefranc MP, Duroux P, Kossida S, Heiner C, Hepler NL, Kuijpers J, Groppi A, Korlach J, Mondon P, Ottones F, Jacobin-Valat MJ, Laroche-Traineau J, Clofent-Sanchez G. Pacific Biosciences Sequencing and IMGT/HighV-QUEST Analysis of Full-Length Single Chain Fragment Variable from an In Vivo Selected Phage-Display Combinatorial Library. Front Immunol 2017; 8:1796. [PMID: 29326697 PMCID: PMC5742356 DOI: 10.3389/fimmu.2017.01796] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 11/30/2017] [Indexed: 12/14/2022] Open
Abstract
Phage-display selection of immunoglobulin (IG) or antibody single chain Fragment variable (scFv) from combinatorial libraries is widely used for identifying new antibodies for novel targets. Next-generation sequencing (NGS) has recently emerged as a new method for the high throughput characterization of IG and T cell receptor (TR) immune repertoires both in vivo and in vitro. However, challenges remain for the NGS sequencing of scFv from combinatorial libraries owing to the scFv length (>800 bp) and the presence of two variable domains [variable heavy (VH) and variable light (VL) for IG] associated by a peptide linker in a single chain. Here, we show that single-molecule real-time (SMRT) sequencing with the Pacific Biosciences RS II platform allows for the generation of full-length scFv reads obtained from an in vivo selection of scFv-phages in an animal model of atherosclerosis. We first amplified the DNA of the phagemid inserts from scFv-phages eluted from an aortic section at the third round of the in vivo selection. From this amplified DNA, 450,558 reads were obtained from 15 SMRT cells. Highly accurate circular consensus sequences from these reads were generated, filtered by quality and then analyzed by IMGT/HighV-QUEST with the functionality for scFv. Full-length scFv were identified and characterized in 348,659 reads. Full-length scFv sequencing is an absolute requirement for analyzing the associated VH and VL domains enriched during the in vivo panning rounds. In order to further validate the ability of SMRT sequencing to provide high quality, full-length scFv sequences, we tracked the reads of an scFv-phage clone P3 previously identified by biological assays and Sanger sequencing. Sixty P3 reads showed 100% identity with the full-length scFv of 767 bp, 53 of them covering the whole insert of 977 bp, which encompassed the primer sequences. The remaining seven reads were identical over a shortened length of 939 bp that excludes the vicinity of primers at both ends. Interestingly these reads were obtained from each of the 15 SMRT cells. Thus, the SMRT sequencing method and the IMGT/HighV-QUEST functionality for scFv provides a straightforward protocol for characterization of full-length scFv from combinatorial phage libraries.
Collapse
Affiliation(s)
| | - Véronique Giudicelli
- IMGT®, The International ImMunoGeneTics Information System®, Laboratoire d'ImmunoGénétique Moléculaire, LIGM, Institut de Génétique Humaine, IGH, UMR 9002, CNRS, Montpellier University, Montpellier, France
| | | | - Marie-Paule Lefranc
- IMGT®, The International ImMunoGeneTics Information System®, Laboratoire d'ImmunoGénétique Moléculaire, LIGM, Institut de Génétique Humaine, IGH, UMR 9002, CNRS, Montpellier University, Montpellier, France
| | - Patrice Duroux
- IMGT®, The International ImMunoGeneTics Information System®, Laboratoire d'ImmunoGénétique Moléculaire, LIGM, Institut de Génétique Humaine, IGH, UMR 9002, CNRS, Montpellier University, Montpellier, France
| | - Sofia Kossida
- IMGT®, The International ImMunoGeneTics Information System®, Laboratoire d'ImmunoGénétique Moléculaire, LIGM, Institut de Génétique Humaine, IGH, UMR 9002, CNRS, Montpellier University, Montpellier, France
| | | | | | | | - Alexis Groppi
- Université de Bordeaux, Centre de Bioinformatique de Bordeaux (CBiB), Bordeaux, France
| | | | | | | | | | | | | |
Collapse
|
13
|
Abstract
SummaryAbciximab is an anti-GPIIb-IIIa drug widely used to prevent thrombotic complications during percutaneous coronary intervention. We now report on the immunologic origin of thrombocytopenia developing between 7 and 12 days after the onset of abciximab infusion. Antibodies directed against abciximabcoated platelets were located in 5 patients with delayed thrombocytopenia, just as they were present in a patient whose platelet count fell within a few hours after receiving the drug. Abciximab-dependent IgG antibody was revealed in serum using control platelets in the monoclonal antibody immobilization of platelet antigens assay (MAIPA) performed with SZ22, a MoAb to GPIIb. The presence of IgG antibodies specific for platelets sensitized with abciximab was confirmed by flow cytometry. They were not located in 13 patients receiving abciximab but whose platelet counts remained stable. For three patients, antibodies were transient and their presence related to the extent of the thrombocytopenia. Surprisingly, antibodycontaining plasma from three patients induced abciximabdependent activation and aggregation of normal platelets, a finding confirmed by electron microscopy. Immunogold labeling revealed that abciximab was associated with platelets in the aggregate, suggesting that its inhibitory effect was overcome by the platelet stimulation. In summary, these results show that abciximab-dependent thrombocytopenia can be delayed and potentially prothrombotic.
Collapse
Affiliation(s)
- Paquita Nurden
- IFR4/FR21, Laboratoire d'Hématologie, Hôpital Cardiologique, 33604 Pessac, France.
| | | | | | | | | | | | | |
Collapse
|
14
|
Prévot G, Mornet S, Lorenzato C, Kauss T, Adumeau L, Gaubert A, Baillet J, Barthélémy P, Clofent-Sanchez G, Crauste-Manciet S. Data on iron oxide core oil-in-water nanoemulsions for atherosclerosis imaging. Data Brief 2017; 15:876-881. [PMID: 29159224 PMCID: PMC5675726 DOI: 10.1016/j.dib.2017.10.059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 10/13/2017] [Accepted: 10/23/2017] [Indexed: 11/23/2022] Open
Abstract
The data presented in this article are related to the publication entitled "Iron oxide core oil-in-water nanoemulsion as tracer for atherosclerosis MPI and MRI imaging" (Prévot et al., 2017) [1]. Herein we describe the synthesis and the characteristics of the Superparamagnetic Iron Oxide Nanoparticles (SPION) loaded inside nanoemulsions (NEs). Focus was set on obtaining SPION with narrow size distribution and close to superparamagnetic limit (20 nm) in order to reach a reasonable magnetic signal. Nanoparticles (NPs) of three different sizes were obtained (7, 11 and 18 nm) and characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), diffuse reflectance infrared Fourier transform (DRIFT) and thermogravimetric analysis (TGA). SPION were coated with oleic acid (OA) in order to load them inside the oily core of NEs droplets. SPION loaded NEs were magnetically sorted using MACS® MS Column (Miltenyi Biotec) and iron quantification was performed by UV-spectrometry measurements.
Collapse
Affiliation(s)
- Geoffrey Prévot
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000 Bordeaux, France
| | - Stéphane Mornet
- CNRS, Univ. Bordeaux, ICMCB, UPR 9048, F-33600 Pessac, France
| | - Cyril Lorenzato
- Univ. Bordeaux, CNRS UMR 5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, F-33000 Bordeaux, France
| | - Tina Kauss
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000 Bordeaux, France
| | - Laurent Adumeau
- CNRS, Univ. Bordeaux, ICMCB, UPR 9048, F-33600 Pessac, France
| | - Alexandra Gaubert
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000 Bordeaux, France
| | - Julie Baillet
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000 Bordeaux, France
| | - Philippe Barthélémy
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000 Bordeaux, France
| | - Gisèle Clofent-Sanchez
- Univ. Bordeaux, CNRS UMR 5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, F-33000 Bordeaux, France
| | - Sylvie Crauste-Manciet
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000 Bordeaux, France
| |
Collapse
|
15
|
Clofent-Sanchez G, Coste P, Nurden P, Lajus S, Jais C, Nurden A. Thrombocytopenia after abciximab use results from different mechanisms. Thromb Haemost 2017; 103:651-61. [DOI: 10.1160/th09-08-0603] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2009] [Accepted: 11/22/2009] [Indexed: 11/05/2022]
Abstract
SummaryOur study concerns thrombocytopenia in patients with acute ischaemic coronary artery disease receiving antiplatelet drugs to the αIIbβ3 inte-grin (GPIIb/IIIa). We have screened for drug-dependent antibodies (DDAB) in 18 patients who suffered a fall of > 50% in platelet count (9 patients had a nadir of <50,000 platelets/μl) after receiving abciximab and related results to clinical outcome. Serum or plasma was screened for DDAB using (i) a direct ELISA against purified αIIbβ3, αIIbβ3-abciximab complexes or abciximab alone, (ii) control platelets and flow cytometry and (iii) monoclonal antibody immobilisation of platelet antigens. DDAB were found for 11 patients, with αIIbβ3 ELISA the most sensitive test. Progressive platelet consumption linked with haemoglobin loss and/or use of intra-aortic balloon pumping, another potential cause of a fall in platelet count, was also evaluated. DDAB were identified that recognised αIIbβ3 associated with abciximab and/ or abciximab alone. Screening of both progressive and delayed thrombocytopenia (appearing after 5 to 11 days) suggested that antibodies against abciximab preceded those recognising neo-epitopes on αIIbβ3, with a time-dependent broadening of antibody specificities. Higher titres were seen after second abciximab use. Five antibodies were platelet-activating. In conclusion, the mechanisms responsible for this complication of anti-αIIbβ3 therapy are multiple and often associated with a complex immune response.
Collapse
|
16
|
Prévot G, Duonor-Cérutti M, Larivière M, Laroche-Traineau J, Jacobin-Valat MJ, Barthélémy P, Clofent-Sanchez G, Crauste-Manciet S. Data on atherosclerosis specific antibody conjugation to nanoemulsions. Data Brief 2017; 15:824-827. [PMID: 29159220 PMCID: PMC5676083 DOI: 10.1016/j.dib.2017.10.058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 10/13/2017] [Accepted: 10/23/2017] [Indexed: 11/18/2022] Open
Abstract
This article present data related to the publication entitled “Iron oxide core oil-in-water nanoemulsion as tracer for atherosclerosis MPI and MRI imaging” (Prévot et al., 2017) [1]. Herein we describe the engineering in the baculovirus-insect cell system and purification processes of the human scFv-Fc TEG4-2C antibody, specific of platelets within the atheroma plaque. For molecular targeting purpose, atheroma specific antibody was conjugated to nanoemulsions (NEs) using a heterobifunctional linker (DSPE-PEG-maleimide). Atheroma labelling was assayed by immunochemistry on arterial sections from rabbits.
Collapse
Affiliation(s)
- Geoffrey Prévot
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000 Bordeaux, France
| | | | - Mélusine Larivière
- Univ. Bordeaux, CNRS UMR 5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, F-33000 Bordeaux, France
| | - Jeanny Laroche-Traineau
- Univ. Bordeaux, CNRS UMR 5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, F-33000 Bordeaux, France
| | - Marie Josée Jacobin-Valat
- Univ. Bordeaux, CNRS UMR 5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, F-33000 Bordeaux, France
| | - Philippe Barthélémy
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000 Bordeaux, France
| | - Gisèle Clofent-Sanchez
- Univ. Bordeaux, CNRS UMR 5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, F-33000 Bordeaux, France
| | - Sylvie Crauste-Manciet
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000 Bordeaux, France
| |
Collapse
|
17
|
Prévot G, Kauss T, Lorenzato C, Gaubert A, Larivière M, Baillet J, Laroche-Traineau J, Jacobin-Valat MJ, Adumeau L, Mornet S, Barthélémy P, Duonor-Cérutti M, Clofent-Sanchez G, Crauste-Manciet S. Iron oxide core oil-in-water nanoemulsion as tracer for atherosclerosis MPI and MRI imaging. Int J Pharm 2017; 532:669-676. [PMID: 28899764 DOI: 10.1016/j.ijpharm.2017.09.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 09/04/2017] [Accepted: 09/05/2017] [Indexed: 12/20/2022]
Abstract
PURPOSE For early atherosclerosis imaging, magnetic oil-in-water nanoemulsion (NE) decorated with atheroma specific monoclonal antibody was designed for Magnetic Particle Imaging (MPI) and Magnetic Resonance Imaging (MRI). MPI is an emerging technique based on direct mapping of superparamagnetic nanoparticles which may advantageously complement MRI. METHODS NE oily droplets were loaded with superparamagnetic iron oxide nanoparticles of 7, 11 and 18nm and biofunctionalized with atheroma specific scFv-Fc TEG4-2C antibody. RESULTS Inclusion of nanoparticles inside NE did not change the hydrodynamic diameter of the oil droplets, close to 180nm, nor the polydispersity. The droplets were negatively charged (ζ=-30mV). In vitro MPI signal was assessed by Magnetic Particle Spectroscopy (MPS). NE displayed MRI and MPS signals confirming its potential as new contrast agent. NE MPS signal increase with NPs size close to the gold standard (Resovist). In MRI, NE displayed R2* transversal relaxivity of 45.45, 96.04 and 218.81mM-1s-1 for 7, 11 and 18nm respectively. NE selectively bind atheroma plaque both in vitro and ex vivo in animal models of atherosclerosis. CONCLUSION Magnetic NE showed reasonable MRI/MPS signals and a significant labelling of the atheroma plaque. These preliminary results support that NE platform could selectively image atherosclerosis.
Collapse
Affiliation(s)
- Geoffrey Prévot
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000, Bordeaux, France
| | - Tina Kauss
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000, Bordeaux, France
| | - Cyril Lorenzato
- Univ. Bordeaux, CNRS UMR 5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, F-33000, Bordeaux, France
| | - Alexandra Gaubert
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000, Bordeaux, France
| | - Mélusine Larivière
- Univ. Bordeaux, CNRS UMR 5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, F-33000, Bordeaux, France
| | - Julie Baillet
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000, Bordeaux, France
| | - Jeanny Laroche-Traineau
- Univ. Bordeaux, CNRS UMR 5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, F-33000, Bordeaux, France
| | - Marie Josée Jacobin-Valat
- Univ. Bordeaux, CNRS UMR 5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, F-33000, Bordeaux, France
| | - Laurent Adumeau
- CNRS, Univ. Bordeaux, ICMCB, UPR 9048, F-33600, Pessac, France
| | - Stéphane Mornet
- CNRS, Univ. Bordeaux, ICMCB, UPR 9048, F-33600, Pessac, France
| | - Philippe Barthélémy
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000, Bordeaux, France
| | | | - Gisèle Clofent-Sanchez
- Univ. Bordeaux, CNRS UMR 5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, F-33000, Bordeaux, France
| | - Sylvie Crauste-Manciet
- Univ. Bordeaux, INSERM, U1212, CNRS UMR 5320, ARNA, ARN: Régulations Naturelle et Artificielle, ChemBioPharm, F-33000, Bordeaux, France.
| |
Collapse
|
18
|
Vallet-Courbin A, Larivière M, Hocquellet A, Hemadou A, Parimala SN, Laroche-Traineau J, Santarelli X, Clofent-Sanchez G, Jacobin-Valat MJ, Noubhani A. A Recombinant Human Anti-Platelet scFv Antibody Produced in Pichia pastoris for Atheroma Targeting. PLoS One 2017; 12:e0170305. [PMID: 28125612 PMCID: PMC5268420 DOI: 10.1371/journal.pone.0170305] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 01/03/2017] [Indexed: 11/18/2022] Open
Abstract
Cells of the innate and adaptive immune system are key factors in the progression of atherosclerotic plaque, leading to plaque instability and rupture, potentially resulting in acute atherothrombotic events such as coronary artery disease, cerebrovascular disease and peripheral arterial disease. Here, we describe the cloning, expression, purification, and immunoreactivity assessment of a recombinant single-chain variable fragment (scFv) derived from a human anti-αIIbβ3 antibody (HuAb) selected to target atheromatous lesions for the presence of platelets. Indeed, platelets within atheroma plaques have been shown to play a role in inflammation, in platelet-leucocyte aggregates and in thrombi formation and might thus be considered relevant biomarkers of atherosclerotic progression. The DNA sequence that encodes the anti-αIIbβ3 TEG4 scFv previously obtained from a phage-display selection on activated platelets, was inserted into the eukaryote vector (pPICZαA) in fusion with a tag sequence encoding 2 cysteines useable for specific probes grafting experiments. The recombinant protein was expressed at high yields in Pichia pastoris (30 mg/L culture). The advantage of P. pastoris as an expression system is the production and secretion of recombinant proteins in the supernatant, ruling out the difficulties encountered when scFv are produced in the cytoplasm of bacteria (low yield, low solubility and reduced affinity). The improved conditions allowed for the recovery of highly purified and biologically active scFv fragments ready to be grafted in a site-directed way to nanoparticles for the imaging of atherosclerotic plaques involving inflammatory processes and thus at high risk of instability.
Collapse
Affiliation(s)
| | - Mélusine Larivière
- Centre de Résonance Magnétique de Systèmes Biologiques, Centre Nationale de Recherche Scientifique et Université de Bordeaux, Bordeaux, France
| | | | - Audrey Hemadou
- Centre de Résonance Magnétique de Systèmes Biologiques, Centre Nationale de Recherche Scientifique et Université de Bordeaux, Bordeaux, France
| | | | - Jeanny Laroche-Traineau
- Centre de Résonance Magnétique de Systèmes Biologiques, Centre Nationale de Recherche Scientifique et Université de Bordeaux, Bordeaux, France
| | | | - Gisèle Clofent-Sanchez
- Centre de Résonance Magnétique de Systèmes Biologiques, Centre Nationale de Recherche Scientifique et Université de Bordeaux, Bordeaux, France
| | - Marie-Josée Jacobin-Valat
- Centre de Résonance Magnétique de Systèmes Biologiques, Centre Nationale de Recherche Scientifique et Université de Bordeaux, Bordeaux, France
| | | |
Collapse
|
19
|
Oumzil K, Ramin MA, Lorenzato C, Hémadou A, Laroche J, Jacobin-Valat MJ, Mornet S, Roy CE, Kauss T, Gaudin K, Clofent-Sanchez G, Barthélémy P. Solid Lipid Nanoparticles for Image-Guided Therapy of Atherosclerosis. Bioconjug Chem 2016; 27:569-75. [PMID: 26751997 DOI: 10.1021/acs.bioconjchem.5b00590] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Although the application of nanotechnologies to atherosclerosis remains a young field, novel strategies are needed to address this public health issue. In this context, the magnetic resonance imaging (MRI) approach has been gradually investigated in order to enable image-guided treatments. In this contribution, we report a new approach based on nucleoside-lipids allowing the synthesis of solid lipid nanoparticles (SLN) loaded with iron oxide particles and therapeutic agents. The insertion of nucleoside-lipids allows the formation of stable SLNs loaded with prostacycline (PGI2) able to inhibit platelet aggregation. The new SLNs feature better relaxivity properties in comparison to the clinically used contrast agent Feridex, indicating that SLNs are suitable for image-guided therapy.
Collapse
Affiliation(s)
- Khalid Oumzil
- University of Bordeaux, ARNA laboratory , F-33000 Bordeaux, France.,INSERM, U869, ARNA laboratory , F-33000 Bordeaux, France
| | - Michael A Ramin
- University of Bordeaux, ARNA laboratory , F-33000 Bordeaux, France.,INSERM, U869, ARNA laboratory , F-33000 Bordeaux, France
| | - Cyril Lorenzato
- CRMSB Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536, CNRS, University of Bordeaux , F-33076 Bordeaux, France
| | - Audrey Hémadou
- CRMSB Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536, CNRS, University of Bordeaux , F-33076 Bordeaux, France
| | - Jeanny Laroche
- CRMSB Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536, CNRS, University of Bordeaux , F-33076 Bordeaux, France
| | - Marie Josée Jacobin-Valat
- CRMSB Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536, CNRS, University of Bordeaux , F-33076 Bordeaux, France
| | - Stephane Mornet
- Institut de Chimie de la Matière Condensée de Bordeaux, ICMCB UPR CNRS 9048, University of Bordeaux , F-33608 Pessac, France
| | - Claude-Eric Roy
- University of Bordeaux, ARNA laboratory , F-33000 Bordeaux, France.,INSERM, U869, ARNA laboratory , F-33000 Bordeaux, France
| | - Tina Kauss
- University of Bordeaux, ARNA laboratory , F-33000 Bordeaux, France.,INSERM, U869, ARNA laboratory , F-33000 Bordeaux, France
| | - Karen Gaudin
- University of Bordeaux, ARNA laboratory , F-33000 Bordeaux, France.,INSERM, U869, ARNA laboratory , F-33000 Bordeaux, France
| | - Gisèle Clofent-Sanchez
- CRMSB Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536, CNRS, University of Bordeaux , F-33076 Bordeaux, France
| | - Philippe Barthélémy
- University of Bordeaux, ARNA laboratory , F-33000 Bordeaux, France.,INSERM, U869, ARNA laboratory , F-33000 Bordeaux, France
| |
Collapse
|
20
|
Jacobin-Valat MJ, Laroche-Traineau J, Larivière M, Mornet S, Sanchez S, Biran M, Lebaron C, Boudon J, Lacomme S, Cérutti M, Clofent-Sanchez G. Nanoparticles functionalised with an anti-platelet human antibody for in vivo detection of atherosclerotic plaque by magnetic resonance imaging. Nanomedicine 2015; 11:927-37. [PMID: 25684334 DOI: 10.1016/j.nano.2014.12.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 11/29/2014] [Accepted: 12/04/2014] [Indexed: 10/24/2022]
Abstract
UNLABELLED Atherosclerosis is an inflammatory disease associated with the formation of atheroma plaques likely to rupture in which platelets are involved both in atherogenesis and atherothrombosis. The rupture is linked to the molecular composition of vulnerable plaques, causing acute cardiovascular events. In this study we propose an original targeted contrast agent for molecular imaging of atherosclerosis. Versatile USPIO (VUSPIO) nanoparticles, enhancing contrast in MR imaging, were functionalised with a recombinant human IgG4 antibody, rIgG4 TEG4, targeting human activated platelets. The maintenance of immunoreactivity of the targeted VUSPIO against platelets was confirmed in vitro by flow cytometry, transmission electronic and optical microscopy. In the atherosclerotic ApoE(-/-) mouse model, high-resolution ex vivo MRI demonstrated the selective binding of TEG4-VUSPIO on atheroma plaques. It is noteworthy that the rationale for targeting platelets within atherosclerotic lesions is highlighted by our targeted contrast agent using a human anti-αIIbβ3 antibody as a targeting moiety. FROM THE CLINICAL EDITOR Current clinical assessment of atherosclerotic plagues is suboptimal. The authors in the article designed functionalized superparamagnetic iron oxide nanoparticles with TEG4, a recombinant human antibody, to target activated platelets. By using MRI, these nanoparticles can be utilized to study the process of atheroma pathogenesis.
Collapse
Affiliation(s)
- Marie-Josée Jacobin-Valat
- CNRS, UMR5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, Université Bordeaux, Bordeaux, France; Plateforme Technologique et d'Innovation Biomédicale, Pessac, France
| | - Jeanny Laroche-Traineau
- CNRS, UMR5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, Université Bordeaux, Bordeaux, France; Plateforme Technologique et d'Innovation Biomédicale, Pessac, France
| | - Mélusine Larivière
- CNRS, UMR5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, Université Bordeaux, Bordeaux, France; Plateforme Technologique et d'Innovation Biomédicale, Pessac, France
| | - Stéphane Mornet
- CNRS, UPR9048, Université de Bordeaux, Institut de Chimie de la Matière Condensée de Bordeaux, Pessac, France
| | - Stéphane Sanchez
- CNRS, UMR5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, Université Bordeaux, Bordeaux, France; Plateforme Technologique et d'Innovation Biomédicale, Pessac, France
| | - Marc Biran
- CNRS, UMR5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, Université Bordeaux, Bordeaux, France
| | - Caroline Lebaron
- CNRS, UPS3044, "Baculovirus et thérapie", St Christol-Les-Alez, France
| | - Julien Boudon
- CNRS, UPR9048, Université de Bordeaux, Institut de Chimie de la Matière Condensée de Bordeaux, Pessac, France
| | - Sabrina Lacomme
- Bordeaux Imaging Center, Université Bordeaux, Bordeaux, France
| | - Martine Cérutti
- CNRS, UPS3044, "Baculovirus et thérapie", St Christol-Les-Alez, France
| | - Gisèle Clofent-Sanchez
- CNRS, UMR5536, CRMSB, Centre de Résonance Magnétique des Systèmes Biologiques, Université Bordeaux, Bordeaux, France; Plateforme Technologique et d'Innovation Biomédicale, Pessac, France.
| |
Collapse
|
21
|
Clofent-Sanchez G, Jacobin-Valat MJ, Laroche-Traineau J. Erratum to “The growing interest of fibrin imaging in atherosclerosis” [Atherosclerosis 222 (1) (2012) 22–25]. Atherosclerosis 2012. [DOI: 10.1016/j.atherosclerosis.2012.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
22
|
Clofent-Sanchez G, Jacobin-Valat MJ, Laroche-Traineau J. The growing interest of fibrin imaging in atherosclerosis. Atherosclerosis 2012; 222:22-5. [DOI: 10.1016/j.atherosclerosis.2012.01.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Accepted: 01/23/2012] [Indexed: 12/19/2022]
|
23
|
Deramchia K, Jacobin-Valat MJ, Vallet A, Bazin H, Santarelli X, Sanchez S, Dos Santos P, Franconi JM, Claverol S, Bonetto S, Clofent-Sanchez G. In vivo phage display to identify new human antibody fragments homing to atherosclerotic endothelial and subendothelial tissues [corrected]. Am J Pathol 2012; 180:2576-89. [PMID: 22521648 DOI: 10.1016/j.ajpath.2012.02.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 02/04/2012] [Accepted: 02/14/2012] [Indexed: 12/24/2022]
Abstract
In vivo phage display selection is a powerful strategy for directly identifying agents that target the vasculature of normal or diseased tissues in living animals. We describe here a new in vivo biopanning strategy in which a human phage single-chain antibody (scFv) library was injected into high-fat diet-fed ApoE(-/-) mice. Extracellular and internalized phage scFvs were selectively recovered from atherosclerotic vascular endothelium and subjacent tissues. After three successive biopanning rounds, a panel of six clones with distinct gene sequences was isolated. Four scFvs produced and purified in soluble form were shown to interact in vitro with a rabbit atheromatous protein extract by time-resolved fluorescence resonance energy transfer and to target the endothelial cell surface and inflamed intima-related regions of rabbit and human tissue sections ex vivo. These new scFvs selected in a mouse model recognized both rabbit and human tissue, underlying the interspecies similarities of the recognized epitopes. By combining immunoprecipitation and mass spectrometry, one of the selected scFvs was shown to recognize carbonic anhydrase II, an up-regulated enzyme involved in resorption of ectopic calcification. These results show that in vivo biopanning selection in hypercholesterolemic animals makes it possible to identify both scFvs homing to atherosclerotic endothelial and subendothelial tissues, and lesion-associated biomarkers. Such scFvs offer promising opportunities in the field of molecular targeting for the treatment of atherosclerosis.
Collapse
Affiliation(s)
- Kamel Deramchia
- Magnetic Resonance Center of Biological Systems, UMR 5536, National Center for Scientific Research, Bordeaux Segalen University, Bordeaux, France
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Jacobin-Valat MJ, Deramchia K, Mornet S, Hagemeyer CE, Bonetto S, Robert R, Biran M, Massot P, Miraux S, Sanchez S, Bouzier-Sore AK, Franconi JM, Duguet E, Clofent-Sanchez G. MRI of inducible P-selectin expression in human activated platelets involved in the early stages of atherosclerosis. NMR Biomed 2011; 24:413-424. [PMID: 21192086 DOI: 10.1002/nbm.1606] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Revised: 07/02/2010] [Accepted: 07/26/2010] [Indexed: 05/30/2023]
Abstract
The noninvasive imaging of atherosclerotic plaques at an early stage of atherogenesis remains a major challenge for the evaluation of the pathologic state of patients at high risk of acute coronary syndromes. Recent studies have emphasized the importance of platelet-endothelial cell interactions in atherosclerosis-prone arteries at early stages, and the prominent role of P-selectin in the initial loose contact between platelets and diseased vessel walls. A specific MR contrast agent was developed here for the targeting, with high affinity, of P-selectin expressed in large amounts on activated platelets and endothelial cells. For this purpose, PEGylated dextran/iron oxide nanoparticles [PEG, poly(ethylene glycol)], named versatile ultrasmall superparamagnetic iron oxide (VUSPIO) particles, labeled with rhodamine were coupled to an anti-human P-selectin antibody (VH10). Flow cytometry and microscopy experiments on human activated platelets were highly correlated with MRI (performed at 4.7 and 0.2 T), with a 50% signal decrease in T(2) and T(1) values corresponding to the strong labeling of activated vs resting platelets. The number of 1000 VH10-VUSPIO nanoparticles attained per activated platelet appeared to be optimal for the detection of hypo- and hyper-signals in the platelet pellet on T(2) - and T(1) -weighted MRI. Furthermore, in vivo imaging of atherosclerotic plaques in ApoE mice at 4.7 T showed a spatial resolution adapted to the imaging of intimal thickening and a hypo-signal at 4.7 T, as a result of the accumulation of VH10-VUSPIO nanoparticles in the plaque. Our work provides support for the further assessment of the use of VH10-VUSPIO nanoparticles as a promising imaging modality able to identify the early stages of atherosclerosis with regard to the pertinence of both the target and the antibody-conjugated contrast agent used.
Collapse
|
25
|
Bouzier-Sore AK, Ribot E, Bouchaud V, Miraux S, Duguet E, Mornet S, Clofent-Sanchez G, Franconi JM, Voisin P. Nanoparticle phagocytosis and cellular stress: involvement in cellular imaging and in gene therapy against glioma. NMR Biomed 2010; 23:88-96. [PMID: 19795366 DOI: 10.1002/nbm.1434] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In gene therapy against glioma, targeting tumoral tissue is not an easy task. We used the tumor infiltrating property of microglia in this study. These cells are well adapted to this therapy since they can phagocyte nanoparticles and allow their visualization by MRI. Indeed, while many studies have used transfected microglia containing a suicide gene and other internalized nanoparticles to visualize microglia, none have combined both approaches during gene therapy. Microglia cells were transfected with the TK-GFP gene under the control of the HSP(70) promoter. First, the possible cellular stress induced by nanoparticle internalization was checked to avoid a non-specific activation of the suicide gene. Then, MR images were obtained on tubes containing microglia loaded with superparamagnetic nanoparticles (VUSPIO) to characterize their MR properties, as well as their potential to track cells in vivo. VUSPIO were efficiently internalized by microglia, were found non-toxic and their internalization did not induce any cellular stress. VUSPIO relaxivity r(2) was 224 mM(-1).s(-1). Such results could generate a very high contrast between loaded and unloaded cells on T(2)-weighted images. The intracellular presence of VUSPIO does not prevent suicide gene activity, since TK is expressed in vitro and functional in vivo. It allows MRI detection of gene modified macrophages during cell therapy strategies.
Collapse
|
26
|
Clofent-Sanchez G, Harizi H, Nurden A, Coste P, Jais C, Nurden P. A case of profound and prolonged tirofiban-induced thrombocytopenia and its correction by intravenous immunoglobulin G. J Thromb Haemost 2007; 5:1068-70. [PMID: 17461936 DOI: 10.1111/j.1538-7836.2007.02440.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
27
|
Robert R, Jacobin-Valat MJ, Daret D, Miraux S, Nurden AT, Franconi JM, Clofent-Sanchez G. Identification of human scFvs targeting atherosclerotic lesions: selection by single round in vivo phage display. J Biol Chem 2006; 281:40135-43. [PMID: 17068330 DOI: 10.1074/jbc.m609344200] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Our aim was to investigate by in vivo biopanning the lesions developed early in atherosclerosis and identify human antibodies that home to diseased regions. We have designed a two-step approach for a rapid isolation of human Monoclonal phage-display single-chain antibodies (MoPhabs) reactive with proteins found in lesions developed in an animal model of atherosclerosis. After a single round of in vivo biopanning, the MoPhabs were eluted from diseased sections of rabbit aorta identified by histology and NMR microscopy. MoPhabs expressed in situ were selected by subtractive colony filter screening for their capacity to recognize atherosclerotic but not normal aorta. MoPhabs selected by our method predominantly bind atherosclerotic lesions. Two of them, B3.3G and B3.GER, produced as scFv fragments, recognized an epitope present on the surface in early atherosclerotic lesions and within the intimal thickness in more complex plaques. These human MoPhabs homed to atherosclerotic lesions in ApoE(-/-) mice after in vivo injection. A protein of approximately 56 kDa recognized by B3.3G was affinity-purified and identified by mass spectrometry analysis as vitronectin. This is the first time that single round in vivo biopanning has been used to select human antibodies as candidates for diagnostic imaging and for obtaining insight into targets displayed in atherosclerotic plaques.
Collapse
Affiliation(s)
- Rémy Robert
- Résonance Magnétique des Systèmes Biologiques, Centre National Recherche Scientifique (CNRS), UMR 5536, Université Bordeaux 2 Victor Ségalen, 146 rue Léo Saignat, 33076 Bordeaux, France.
| | | | | | | | | | | | | |
Collapse
|
28
|
Robert R, Clofent-Sanchez G, Hocquellet A, Jacobin-Valat MJ, Daret D, Noubhani AM, Santarelli X. Large-scale production, bacterial localization assessment and immobilized metal affinity chromatography purification of a human single-chain Fv antibody against alphaIIb-beta3 integrin. Int J Biol Macromol 2006; 39:51-9. [PMID: 16620955 DOI: 10.1016/j.ijbiomac.2006.01.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2005] [Revised: 01/18/2006] [Accepted: 01/18/2006] [Indexed: 11/28/2022]
Abstract
Our objective was to investigate the Escherichia coli localization (such as supernatant, cytoplasm and inclusion bodies) of an anti-alphaIIb-beta3 (alphaIIbbeta3) scFv fragment referred to as scFv[EBB3] produced in batch fermentation. Immobilized metal affinity chromatography (IMAC) purification was performed on supernatant using expanded bed absorbed technology (EBA) and on sonicated cells in native conditions over an immobilized copper-ion affinity column. Inclusion bodies were solubilized before IMAC purification and the refolding procedure was performed on the column. The majority of scFv[EBB3] were present as inclusion bodies (55%), whereas 36% were found in the cytoplasm and only 9% secreted in the supernatant. The scFv activity was assessed by enzyme-linked immunosorbent assay (ELISA), flow cytometry and immunohistochemistry analyses performed on a thrombus induced in vivo on an atherosclerotic rabbit model.
Collapse
Affiliation(s)
- R Robert
- CNRS UMR 5536, RMSB Résonance Magnétique des Systèmes Biologiques, Université Victor Ségalen, Bât. 4a, 146 rue Léo Saignat, 33076 Bordeaux, France.
| | | | | | | | | | | | | |
Collapse
|
29
|
Robert R, Noubhani AM, Jacobin MJ, Santarelli X, Clofent-Sanchez G. Improvement in production and purification bioprocesses of bacterially expressed anti-alphaIIbbeta3 human single-chain FV antibodies. J Chromatogr B Analyt Technol Biomed Life Sci 2005; 818:43-51. [PMID: 15722043 DOI: 10.1016/j.jchromb.2004.10.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2004] [Accepted: 10/07/2004] [Indexed: 11/26/2022]
Abstract
Production of anti-alphaIIbbeta3 (anti-alphaIIbbeta3)-binding single-chain FV (scFv) fragments obtained from combinatorial libraries of IgG human antibodies is of broad interest for imaging and treatment of acute coronary syndromes. The objective of our work was to design an optimized production of one selected anti-alphaIIbbeta3-binding scFv fragment for subsequent in vivo animal studies. Fed-batch fermentation was initiated with 2TY media supplemented with 0.1 M glucose. This growing batch culture was used as a starting point for further fed-batch induction, in which a media without glucose containing 1 mM IPTG and 0.4 M saccharose was continuously added. Subsequent purification was performed on the whole cell extract in native conditions over an immobilized copper-ion affinity column. The improved conditions allowed the recovery of 5 mg of highly purified scFv fragments as determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The bioactivity of the scFv fragments was further monitored by ELISA, cytometric and immunohistochemical methods.
Collapse
Affiliation(s)
- R Robert
- CNRS UMR 5536 Résonance Magnétique des Systèmes Biologiques (RMSB), Université Victor Segalen Bordeaux 2, Bât. 4a, 146 rue Léo Saignat, 33076 Bordeaux Cedex, France
| | | | | | | | | |
Collapse
|
30
|
Jacobin MJ, Santarelli X, Laroche-Traineau J, Clofent-Sanchez G. Production of a human monoclonal IgM directed against human cardiac myosin in a hollow-fiber bioreactor for membrane anion exchange chromatography one-step purification. Hum Antibodies 2004; 13:69-79. [PMID: 15598987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
Purification of human IgM monoclonal antibodies (MAbs) has proved to be difficult. Since IgM Mabs tend to bind strongly to a variety of resin support surfaces, the number of chromatographic steps used in the purification of these biomolecules should be minimized. Here we describe procedures developed for the optimal production and purification of the human monoclonal IgM B7, which specifically binds to the myosin heavy chain of human ventricular myocardium. This property makes this antibody potentially useful for the diagnosis of myocardial necrosis. Several chromatographic techniques were evaluated (size exclusion, ion exchange, affinity chromatography). The best results were obtained with anion exchange membrane chromatography using Sartobind Q15 (98% purity, 30% recovery). IgM production was improved by the hollow fiber technology which permitted the use of serum-reduced medium and an increase in antibody concentration to an average production of 300-400 microg/ml, compared to 20 microg/ml in flask culture. Several flow-rates were also evaluated, the optimal being 20 ml/minute for 30% of recovery. Importantly, the purified IgM molecule was able to bind to human myosin in ELISA and Western-blotting, thus allowing the IgM to be kept intact for further radiolabeling.
Collapse
|
31
|
Jacobin MJ, Robert R, Pouns O, Laroche-Traineau J, Nurden A, Peter K, Little M, Clofent-Sanchez G. Improving selection of αIIbβ3-binding phage antibodies with increased reactivity derived from immunized donors. Clin Immunol 2003; 108:199-210. [PMID: 14499243 DOI: 10.1016/s1521-6616(03)00143-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Although many studies of the immune response in polytransfused Glanzmann thrombasthenia (GT) patients and in autoimmune thrombocytopenic purpura (AITP) have demonstrated the frequent development of Abs directed against the alphaIIbbeta3 integrin, little is known about the induced anti-alphaIIbbeta3 autoantibodies at the molecular level. Phage display is a powerful technology for selecting and engineering mAbs expressed on the surface of filamentous bacteriophage. Combinatorial libraries of single-chain IgG were constructed from splenocytes from two patients with AITP and one patient with GT. In a previous study, activated platelets or alphaIIbbeta3-expressing CHO cells selection was performed to isolate human IgG anti-alphaIIbbeta3 binding fragments using combinatorial libraries created from the B cells of a GT and an AITP patient. However, we have experienced practical problems such as enrichment of truncated antibodies during selection. We decided to test prolonged treatments with elution agents after screening on the purified form of the alphaIIbbeta3 integrin activated with the RGD peptide. We obtained a higher percentage of clones with full-size antibody fragments as well as an enrichment of more specific alphaIIbbeta3-binding phage-Abs. Some of them, recognizing the activated form of the integrin, would be interesting to further study as potential diagnostic or therapeutic agents in acute coronary syndromes. Sequencing of selected phage-Abs revealed that they used different VH and VL genes with, for the majority of them, a high level of extensive hypermutations in the complementarity determining regions, indicating the diversity of the antigen-driven immune response that occurred in GT and AITP patients.
Collapse
Affiliation(s)
- M J Jacobin
- CNRS UMR 5533, Hôpital Cardiologique, Avenue de Magellan, 33604 Pessac, France
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Jacobin MJ, Laroche-Traineau J, Little M, Keller A, Peter K, Welschof M, Nurden A, Clofent-Sanchez G. Human IgG monoclonal anti-alpha(IIb)beta(3)-binding fragments derived from immunized donors using phage display. J Immunol 2002; 168:2035-45. [PMID: 11823541 DOI: 10.4049/jimmunol.168.4.2035] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Previous studies of the immune response in polytransfused Glanzmann thrombasthenia (GT) patients and in autoimmune thrombocytopenic purpura (AITP) have relied on serum analysis and have shown the frequent development of Abs directed against the alpha(IIb)beta(3) integrin. However, little is known about the molecular diversity of the humoral immune response to alpha(IIb)beta(3) due to the paucity of mAbs issuing from these pathologies. We have isolated human IgG anti-alpha(IIb)beta(3) binding fragments using combinatorial libraries of single-chain IgG created from the B cells of a GT and an AITP patient, both with serum Abs. Ab screening was performed using activated platelets or activated alpha(IIb)beta(3)-expressing Chinese hamster ovary cells. Sequencing of selected phage Abs showed that a broad selection of genes from virtually all V gene families had been used, indicating the diversity of the immune response. About one-half of the V(H) and V(L) segments of our IgG anti-alpha(IIb)beta(3) fragments displayed extensive hypermutations in the complementarity-determining region, supporting the idea that an Ag-driven immune response was occurring in both patients. The H chain complementarity-determining region 3 analysis of phage Abs revealed motifs other than the well-known RGD and KQAGDV integrin-binding sequences. To our knowledge, our study is the first to illustrate multiple human IgG anti-alpha(IIb)beta(3) reactivities and structural variations linked to the anti-platelet human immune response. Human alpha(IIb)beta(3) Abs preferentially directed against the activated form of the integrin were further characterized because platelet alpha(IIb)beta(3) inhibitors are potential therapeutic reagents for treating acute coronary syndromes. Currently available alpha(IIb)beta(3) antagonists do not specifically recognize the activated form of the integrin.
Collapse
Affiliation(s)
- Marie-Josée Jacobin
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 5533, Hopital Cardiologique, Pessac, France
| | | | | | | | | | | | | | | |
Collapse
|
33
|
Dabadie M, Valli N, Jacobin MJ, Laroche-Traineau J, Barat JL, Ducassou D, Nurden AT, Clofent-Sanchez G. Characterisation, cloning and sequencing of a conformation-dependent monoclonal antibody to the alphaIIbbeta3 integrin: interest for use in thrombus detection. Platelets 2001; 12:395-405. [PMID: 11674856 DOI: 10.1080/09537100120071031] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
The detection of newly formed thrombi is of primary importance in clinical medicine. The activated platelet is a potential target for the localization of thrombotic lesions in arteries. The integrin alpha(IIb)beta(3) membrane changes conformation upon activation. A novel anti-alpha(IIb)beta(3) monoclonal antibody (MAb), XIIF9, is described which recognizes an epitope whose expression was enhanced by activation. Radioiodinated XIIF9 bound to a single class of sites on the beta(3) subunit, with 13600 +/- 2000 molecules bound per unstimulated platelet and a K(d) of 34.5 nM. Platelets stimulated with 0.5 U/ml of thrombin bound 66000 +/- 4000 molecules/cell (K(d) = 51.6 nM). Moreover, XIIF9 binding to unstimulated platelets could be increased 4-fold by treatment of the alpha(IIb)beta(3) complex with 5 mM EDTA. Thus, XIIF9 recognized an epitope on the beta(3) subunit whose accessibility was increased upon thrombin activation or EDTA treatment. Sequence analysis of the gene segment encoding the XIIF9 heavy chain revealed interesting motifs shared with cyclic CX6-7C anti-alpha(IIb)beta(3) peptides or with AC7, a published MAb specific for activated alpha(IIb)beta(3). In vivo experiments in atherosclerotic rabbits followed by immunohistological analysis, revealed a specific binding of XIIF9 on platelets engaged in thrombus formation, demonstrating real clinical potential for such MAbs in imaging.
Collapse
Affiliation(s)
- M Dabadie
- Equipe Imagerie Médical EA 1699, Laboratoire de Biophysique, Université de Bordeaux II, 146 Rue Léo-Saignat, 33076 Bordeaux, France.
| | | | | | | | | | | | | | | |
Collapse
|
34
|
Laroche-Traineau J, Biard-Piechaczyk M, Jacobin MJ, Chagnaud JL, Pau B, Nurden A, Clofent-Sanchez G. Analysis of VH and VL genes of a monospecific human anti-myosin antibody produced by a B cell from the primary repertoire. Hum Antibodies 2000; 9:177-88. [PMID: 10690632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Epstein-Barr virus (EBV) transformation of B lymphocytes from a Glanzmann's thrombasthenia patient with a serum antibody to the integrin alpha IIb beta 3, led to the immortalization of a B cell secreting a monospecific IgM monochonal antibody (MAb), B7, reactive with platelet myosin. Analysis of B7 V genes revealed minimally mutated sequences: the immortalized B cell issued from the primary repertoire, with no evidence of an in vivo selection by myosin. The V genes were here compared with sequences of human MAbs available on databases to more clearly understand the monospecificity of the B7 MAb. B7 V genes were closely identical to rearranged V genes in clones with self-specificities, often secreting polyreactive antibodies. In contrast, B7 is an unmutated monoreactive human MAb able to recognize myosin with a high avidity. Comparison of the CDR3H sequence with that of MAbs in databases supports a central role for the CDR3H subdomain in determining monospecificity. Our results suggest the existence of a monospecific autoreactive B cell compartment, besides the well-known polyspecific one, susceptible to be the template of pathogenic autoreactivity, characterized by antibodies of high affinity and specificity.
Collapse
|
35
|
Laroche-Traineau J, Clofent-Sanchez G, Santarelli X. Three-step purification of bacterially expressed human single-chain Fv antibodies for clinical applications. J Chromatogr B Biomed Sci Appl 2000; 737:107-17. [PMID: 10681047 DOI: 10.1016/s0378-4347(99)00441-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We have obtained a cell line which secretes a human monoclonal IgM (B7) reacting with the myosin heavy chain of human heart. We have constructed single-chain fragments (scFv) of B7. The scFv may be useful for the imaging of myocardial necrosis after myocarditis, cardiac drug toxicosis or graft rejection. The aim of our work was to purify the scFv for immunoscintigraphy. We describe several purification steps including immobilized metal affinity chromatography (IMAC), anti-c-myc monoclonal antibody affinity chromatography, size-exclusion chromatography with Superdex 75 HR 10/30 and ion-exchange chromatography (mini Q TM 30Q).
Collapse
Affiliation(s)
- J Laroche-Traineau
- Laboratoire de Pathologie Cellulaire de l'Hémostase, CNRS, UMR 5533, Hôpital du Haut-Lévêque, Pessac, France
| | | | | |
Collapse
|
36
|
Laroche-Traineau J, Jacobin MJ, Biard-Piechaczyk M, Vuillemin L, Chagnaud JL, Pau B, Nurden AT, Clofent-Sanchez G. Analysis of the V genes coding for a monospecific human antibody to myosin and functional expression of single chain Fv fragments. FEBS Lett 1999; 460:86-92. [PMID: 10571066 DOI: 10.1016/s0014-5793(99)01308-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
A monospecific human IgM monoclonal antibody (mAb), reactive with myosin from human heart, has been obtained by EBV transformation. This mAb may have a diagnostic potential in the imaging of myocardial necrosis. However, owing to the fact that the molecular mass of an IgM is 900 kDa, a poor diffusion and a slow penetration inside necrotic myocytes could reduce its capacity for scintigraphic detection. In order to alleviate these problems, we constructed the scFv by cloning the VH and VL domains into the pHOG21 vector. Analysis of the V genes proved an unmutated configuration showing that the immortalized B cell issued from the primary IgM repertoire. The expression product in Escherichia coli was a 35 kDa scFv fragment with the antigen-binding specificity of the parental mAb.
Collapse
|
37
|
Viallard JF, Pellegrin JL, Vergnes C, Borel-Derlon A, Clofent-Sanchez G, Nurden AT, Leng B, Nurden P. Three cases of acquired von Willebrand disease associated with systemic lupus erythematosus. Br J Haematol 1999. [DOI: 10.1111/j.1365-2141.1999.01360.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
38
|
Viallard JF, Pellegrin JL, Vergnes C, Borel-Derlon A, Clofent-Sanchez G, Nurden AT, Leng B, Nurden P. Three cases of acquired von Willebrand disease associated with systemic lupus erythematosus. Br J Haematol 1999; 105:532-7. [PMID: 10233433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Acquired von Willebrand disease associated with systemic lupus erythematosus (SLE) has been detected in three middle-aged women. In each case the first clinical manifestation was a bleeding syndrome. Plasma levels of von Willebrand factor (VWF) and ristocetin-induced platelet agglutination were as found in type 1 von Willebrand disease for the first patient, type 3 for the second patient, and type 2 for the third patient. Intraplatelet levels of VWF were normal for all three patients. In all cases a mixture of patient's plasma with normal plasma resulted in inhibition of ristocetin-induced binding of VWF to normal platelets. Intravenous immunoglobulin given to patients 2 and 3 corrected the plasma VWF level of the second patient but not that of the third. Therapy with corticosteroids was partially beneficial for patient 3 and patient 2. For patient 2, the severity of the cutaneous lesions also led to the use of cyclophosphamide, and this therapy resulted in total correction of VWF levels. Our observations confirm previous reports of acquired von Willebrand syndrome associated with SLE and show heterogeneity both in the phenotypic form and in the response to treatment.
Collapse
Affiliation(s)
- J F Viallard
- Clinique de Médecine Interne et Maladies Infectieuses, Hôpital Haut-Lévêque, Pessac, France
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Santarelli X, Domergue F, Clofent-Sanchez G, Dabadie M, Grissely R, Cassagne C. Characterization and application of new macroporous membrane ion exchangers. J Chromatogr B Biomed Sci Appl 1998; 706:13-22. [PMID: 9544803 DOI: 10.1016/s0378-4347(97)00532-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A new ready-to-use unit for high-performance membrane chromatography has been characterized. Its dynamic capacity, resolving power and protein recovery were measured at different flow-rates. The binding capacity was 0.5-2 mg/cm2 with a 95% recovery at 10 ml/min irrespective of the protein concentration up to 10 mg/ml. For very-high flow-rates (50 and 100 ml/min) the recovery was 90% and 70%. At these flow-rates, the maximum back-pressure was about 0.1 MPa and was independent of the filtration area. By increasing the filtration area, a proportional capacity increase was obtained, indicating an easy scale-up. High flow-rates had only a slight effect on resolution. This new adsorber was able to purify IgM from supernatant of cell culture of a human hybridoma in less than 8 min with a high degree of purity (95%).
Collapse
Affiliation(s)
- X Santarelli
- Ecole Supérieure de Technologie des Biomolécules de Bordeaux, Université Victor Ségalen Bordeaux 2, France
| | | | | | | | | | | |
Collapse
|
40
|
Macchi L, Nurden P, Marit G, Bihour C, Clofent-Sanchez G, Combrié R, Nurden AT. Autoimmune thrombocytopenic purpura (AITP) and acquired thrombasthenia due to autoantibodies to GP IIb-IIIa in a patient with an unusual platelet membrane glycoprotein composition. Am J Hematol 1998; 57:164-75. [PMID: 9462551 DOI: 10.1002/(sici)1096-8652(199802)57:2<164::aid-ajh13>3.0.co;2-c] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The subject (E.B.) is a 63-year-old woman with autoimmune thrombocytopenic purpura (AITP) who was first examined some 6 years ago with symptoms of epistaxis and gum bleeding, severe thrombocytopenia, and large platelets. Her serum tested positively with control platelets in the MAIPA assay performed using monoclonal antibodies (MoAb) to glycoprotein (GP) IIIa (XIIF9, Y2/51), yet was negative in the presence of MoAbs to GP IIb (SZ 22) or to the GP IIb-IIIa complex (AP2, P2). The patient's platelets failed to aggregate with all agonists tested except for ristocetin. IgG isolated from the patient's serum inhibited ADP-induced aggregation of control platelets. Unexpectedly, flow cytometry showed an altered expression of membrane glycoproteins on the patient's platelets. Levels of GP Ib-IX were much higher than previously located by us in platelets. In contrast, the expression of GP IIb-IIIa was about half that seen with control subjects. When Western blotting was performed, a striking finding was a strong band of 250 kDa recognized by a series of MoAbs to GP Ib alpha in addition to the band in the normal position of GP Ib alpha. Finally, ADP-stimulated (E.B.) platelets failed to express activation-dependent epitopes on GP IIb-IIIa as recognized by PAC-1, AP6, or F26 and additionally gave a reduced P-selectin expression after thrombin addition. In conclusion, we present a novel patient with a severely perturbed platelet function where an altered membrane GP profile is associated with the presence of an autoantibody recognizing a complex-dependent determinant on GP IIb-IIIa and inhibitory of platelet aggregation.
Collapse
Affiliation(s)
- L Macchi
- UMR 5533 CNRS, Hôpital Cardiologique, Pessac, France
| | | | | | | | | | | | | |
Collapse
|
41
|
Macchi L, Rispal P, Clofent-Sanchez G, Pellegrin JL, Nurden P, Leng B, Nurden AT. Anti-platelet antibodies in patients with systemic lupus erythematosus and the primary antiphospholipid antibody syndrome: their relationship with the observed thrombocytopenia. Br J Haematol 1997; 98:336-41. [PMID: 9266930 DOI: 10.1046/j.1365-2141.1997.2243038.x] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The role of antiphospholipid antibodies in the pathogenesis of the thrombocytopenia observed during primary antiphospholipid antibody syndrome (APAS) and systemic lupus erythematosus (SLE) remains controversial. We have used the MAIPA test to examine the frequency and specificity of anti-platelet antibodies directed against the major platelet membrane glycoproteins (GP IIb-IIIa, GP Ib-IX, GP Ia-IIa and GP IV) in patients where SLE and APAS were associated or not with thrombocytopenia. Results were compared with a series of 26 ITP patients, 46% of whom were shown to possess anti-platelet antibodies directed against one or more of the platelet surface glycoproteins. When APAS was associated with thrombocytopenia, 7/10 patients possessed antibodies against GP IIb-IIIa and/or GP Ib-IX. For SLE patients with thrombocytopenia, 6/10 patients were shown to have antiplatelet antibodies against GP IIb-IIIa, GP Ib-IX or GP IV. In contrast, for APAS (n=11) and SLE patients (n=11) without thrombocytopenia, only one patient had an antibody directed against GP IIb-IIIa and one patient had an antibody to GP IV. Our results suggest that antibodies directed against major platelet membrane glycoproteins may play a role in the thrombocytopenia that is seen during SLE and APAS.
Collapse
Affiliation(s)
- L Macchi
- UMR 5533 CNRS, Hôpital Cardiologique, Pessac, France
| | | | | | | | | | | | | |
Collapse
|
42
|
Clofent-Sanchez G, Laroche-Trainean J, Lucas S, Rispal P, Pellegrin JL, Nurden P, Nurden A. Incidence of anti-mouse antibodies in thrombocytopenic patients with autoimmune disorders. Hum Antibodies 1997; 8:50-9. [PMID: 9289388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Idiopathic thrombotycopenic purpura (ITP) is an autoimmune disorder in which circulating autoantibodies react with target antigens on the platelet membrane. In order to identify the autoimmune response in ITP, two MAIPA (Monoclonal Antibody (MAb) Immobilization of Platelet Antigen) assays (MAIPA I and MAIPA II) were performed on sera from thrombocytopenic patients. In the classic MAIPA assay (MAIPA I), control platelets were incubated simultaneously with human serum and a mouse MAb to a platelet glycoprotein. In MAIPA II, the control platelets were incubated first with the human serum and then, after washing, with the selected mouse MAb. A positive MAIPA I test but a negative MAIPA II has been shown to result from the presence of serum antibodies recognizing mouse MAb to platelet glycoproteins used in the assay. We compared the frequency of such 'anti-mouse' antibodies in patients with thrombocytopenia associated or not with other autoimmune states and in healthy donors with a normal platelet count. Statistically significant differences were found in the incidence of anti-mouse antibodies between patients and healthy donors. Furthermore, the identity of the targeted mouse MAbs varied in sera from the patients. The detected anti-mouse antibodies may include anti-idiotypic antibodies produced against cross-reactive idiotypes shared by human and mouse anti-platelet antibodies.
Collapse
MESH Headings
- Adolescent
- Adult
- Aged
- Anemia, Hemolytic, Autoimmune/complications
- Anemia, Hemolytic, Autoimmune/immunology
- Animals
- Antibodies, Anti-Idiotypic/immunology
- Antibodies, Heterophile/blood
- Antibodies, Heterophile/immunology
- Antibodies, Monoclonal/immunology
- Antibody Specificity
- Antigens, Human Platelet/immunology
- Antiphospholipid Syndrome/complications
- Antiphospholipid Syndrome/immunology
- Arthritis, Rheumatoid/complications
- Arthritis, Rheumatoid/immunology
- Autoantibodies/blood
- Autoantibodies/immunology
- Autoimmune Diseases/blood
- Autoimmune Diseases/immunology
- Blood Platelets/immunology
- Cross Reactions
- Female
- Humans
- Liver Cirrhosis, Biliary/complications
- Liver Cirrhosis, Biliary/immunology
- Lupus Erythematosus, Systemic/complications
- Lupus Erythematosus, Systemic/immunology
- Male
- Mice/immunology
- Middle Aged
- Platelet Membrane Glycoproteins/immunology
- Purpura, Thrombocytopenic, Idiopathic/blood
- Purpura, Thrombocytopenic, Idiopathic/immunology
- Thrombocytopenia/blood
- Thrombocytopenia/immunology
- Thyroiditis, Autoimmune/complications
- Thyroiditis, Autoimmune/immunology
Collapse
Affiliation(s)
- G Clofent-Sanchez
- UMR 5533 CNRS, Hôpital Cardiologique du Haut Lévéque, Pessac, France
| | | | | | | | | | | | | |
Collapse
|
43
|
Macchi L, Clofent-Sanchez G, Marit G, Bihour C, Durrieu-Jais C, Besse P, Nurden P, Nurden AT. PAICA: a method for characterizing platelet-associated antibodies--its application to the study of idiopathic thrombocytopenic purpura and to the detection of platelet-bound c7E3. Thromb Haemost 1996; 76:1020-9. [PMID: 8972027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In idiopathic thrombocytopenic purpura (ITP), autoantibodies reacting with antigens on the platelet membrane bring about accelerated platelet destruction. We now report PAICA ("Platelet-Associated IgG Characterization Assay"), a method for detecting autoantibodies bound to specific membrane glycoproteins in total platelet lysates. This monoclonal antibody (MAb) capture assay takes into account the fact that antibodies on circulating platelets may be translocated to internal pools as well as being on the surface. A total of twenty ITP patients were examined by PAICA, and the results compared with those obtained by measuring (i) serum antibodies bound to paraformaldehyde-fixed control platelets by ELISA, (ii) IgG bound to the surface of the patient's own platelets by flow cytometry (PSIgG), (iii) total platelet-associated IgG (PAIgG) by ELISA and (iv) serum antibodies reacting with control platelets by MAIPA ("Monoclonal Antibody-specific Immobilization of Platelet Antigens"). Of twelve patients with elevated PAIgG, nine had increased PSIgG yet eleven reacted positively in PAICA. Of these, eight possessed antibodies directed against GP IIb-IIIa, two against GP Ib-IX and one patient possessed antibodies directed against GP IIb-IIIa and GP Ia-IIa respectively. Only seven of the patients possessed serum antibodies detectable by MAIPA. PAICA was also able to detect platelet-associated c7E3 (the chimeric form of Fab fragments of the MAb 7E3) following its infusion during antithrombotic therapy, when it proved more sensitive over a seven-day period than a MAIPA assay adapted for assessing surface-bound antibody. We propose that PAICA provides added sensitivity to the detection of platelet-associated antibodies in immune thrombocytopenias or following therapy with humanized MAbs.
Collapse
Affiliation(s)
- L Macchi
- UMR 5533 CNRS, Institut Fédératif, Coeur-Vaisseaux-Thrombose, Hôpital Cardiologique, Pessac, France
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Clofent-Sanchez G, Lucas S, Laroche-Traineau J, Rispal P, Pellegrin JL, Nurden P, Nurden A. Autoantibodies and anti-mouse antibodies in thrombocytopenic patients as assessed by different MAIPA assays. Br J Haematol 1996; 95:153-60. [PMID: 8857954 DOI: 10.1046/j.1365-2141.1996.d01-1888.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Two MAIPA (monoclonal antibody [MAb] immobilization of platelet antigen) assays were performed to determine (a) autoantibodies to platelet glycoproteins (GP) and (b) serum antibodies recognizing mouse MAbs used in the assay. In MAIPA I, control platelets were incubated simultaneously with human serum and a mouse MAb to a platelet glycoprotein (GP IIb-IIIa, Ib-IX, Ia-IIa, IV and p24). In MAIPA II, the control platelets were incubated first with the human serum and then, after washing, with the selected mouse MAb. A series of 25 patients with autoimmune thrombocytopenic purpura (ATP) associated or not with other autoimmune states were examined. Autoantibodies (both MAIPA I and MAIPA II positive) or anti-mouse Abs (MAIPA I positive and MAIPA II negative) were frequent in both groups of patients. Statistically significant differences existed in the incidence of anti-mouse Abs between patients (56.5%) and healthy donors (10%). This suggests that their production may be related to thrombocytopenias associated with autoimmune disease. We speculate that the presence of anti-mouse antibodies could reflect an abnormality in the immunological modulation of the idiotypic network.
Collapse
|
45
|
Laroche-Traineau J, Macchi L, Marit G, Nurden P, Nurden AT, Clofent-Sanchez G. A close spatial relationship between GP IIb-IIIa complexes and CD9 antigen as demonstrated by the MAIPA technique. Platelets 1996; 7:303-11. [PMID: 21043666 DOI: 10.3109/09537109609023593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CD9 is a well-defined component of the platelet plasma membrane and has a copy number almost equivalent to that of glycoprotein (GP) IIb-IIIa complexes, the aggregation receptor on platelets. It has an apparent molecular mass of 24 kD and is otherwise known as p24. Stimulation of p24 by monoclonal antibodies (MAb) induces platelet aggregation and granule release, involves FcγRII, and is mainly mediated through the stimulation of phospholipase C. In accordance with a signalling function, p24 has been reported to associate with small GTP-binding proteins and to GP IIb-IIIa complexes upon activation. We now report further evidence of a strong relationship between p24 and GP IIb-IIIa in platelets. Using the MAIPA (monoclonal antibody immobilization of platelet antigens) assay in the screening of human antibodies to platelet glycoproteins, we found that GP IIb-IIIa-antibody complexes were almost invariably associated with p24 in the harvested detergent-soluble fraction of platelet lysates. Thus, associated human antibodies were detected following the targeting of either GP IIb-IIIa or p24 by monospecific murine monoclonal antibodies (MAbs). This is a point to bear in mind when assessing for antibodies to p24 or GP IIb-IIIa in immune thrombocytopenias.
Collapse
|
46
|
Clofent-Sanchez G, Laroche-Traineau J, Bermudes H, Lucas S, Nurden P, Nurden A. A patient with autoimmune thrombocytopenic purpura demonstrating serum antibodies reactive with mouse cross-reactive idiotypes. Clin Immunol Immunopathol 1995; 77:271-81. [PMID: 7586737 DOI: 10.1006/clin.1995.1153] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Autoimmune thrombocytopenic purpura (ATP) is a syndrome of destructive thrombocytopenia due to platelet-binding antibodies. We report the case of a young woman (C.V.) who has a history of chronic ATP with severe but transient bouts of thrombocytopenia. Using the classic monoclonal antibody (MAb) immobilization of platelet antigens (MAIPA) assay to screen serum antibody specificity, results were strongly positive with MAbs to glycoproteins (GPs) Ib-IX, Ia-IIa, IV, and p24, but weakly positive or negative for GP IIb-IIIa. In contrast, a two-step incubation assay (MAIPA II), in which platelets were incubated sequentially with C.V. serum and the murine MAb, gave negative results for all GPs. Affinity chromatography performed using Bx-1, a MAb to GP Ib, showed that the patient's serum contained antibodies to determinants expressed by mouse immunoglobulins. These were present on Fab fragments on Bx-1. A survey of sera from other patients with thrombocytopenia of immune origin revealed that antibodies reactive with selected idiotypes of mouse MAbs were not infrequent and raises the question of their role in the thrombocytopenia.
Collapse
Affiliation(s)
- G Clofent-Sanchez
- URA 1464 CNRS, Pathologie Cellulaire de l'Hémostase, Hôpital Cardiologique, Pessac, France
| | | | | | | | | | | |
Collapse
|
47
|
Laroche-Traineau J, Clofent-Sanchez G, Daret D, Bonnaud E, Barat JL, Ducassou D, Nurden AT. A human monoclonal antibody obtained from EBV-transformed B cells with specificity for myosin. Br J Haematol 1995; 91:951-62. [PMID: 8547148 DOI: 10.1111/j.1365-2141.1995.tb05419.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
We describe the preparation of a stable human lymphoblastoid cell line obtained during ex vivo studies in which peripheral blood lymphocytes of a Glanzmann's thrombasthenia patient were transformed with Epstein-Barr virus. Somatic hybrids secreted an IgM monoclonal antibody (B7) that reacted with the myosin heavy chain of human platelets by immunoblotting. Flow cytometry showed that B7 barely recognized unstimulated intact platelets, but bound abundantly after permeabilization of fixed cells with Triton X-100. The reactivity of the antibody on thin sections of human myocardium and aorta was studied by immunohistochemistry. B7 specifically stained myosin of myocytes, but there was no labelling of aortic smooth muscle cells. The epitope was conserved in cardiac or skeletal myosin prepared from pig or rabbit. Measurement of the dissociation constant in a competitive ELISA showed that B7 bound with high affinity (10(-8) M). Purified Fab fragments retained their ability to bind to myosin, suggesting that B7 may be useful in the imaging of myocardial necrosis after myocardial infarction, myocarditis, cardiac drug toxicosis or graft rejection. This work also shows that EBV transformation of B cells may uncover naturally occurring autoantibodies which under normal circumstances are inhibited by the immune surveillance system.
Collapse
|