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Trauchessec M, Hesse AM, Kraut A, Berard Y, Herment L, Fortin T, Bruley C, Ferro M, Manin C. An innovative standard for LC-MS-based HCP profiling and accurate quantity assessment: Application to batch consistency in viral vaccine samples. Proteomics 2021; 21:e2000152. [PMID: 33459490 DOI: 10.1002/pmic.202000152] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 10/10/2020] [Accepted: 12/18/2020] [Indexed: 11/05/2022]
Abstract
Biotherapeutics, molecules produced from biological systems, require rigorous purification steps to remove impurities including host cell proteins (HCPs). Regulatory guidelines require manufacturers to monitor process-related impurities along the purification workflow. Mass spectrometry (MS) has recently been considered as a complementary method to the well-established ELISA for HCPs quantification, since it has the advantage of unambiguously identifying individual HCP. In this study, we developed an innovative standard dedicated to MS-based HCP profiling analysis in order to monitor the consistency of viral vaccine intermediate purification samples. This standard, termed the HCP-PROFILER standard, is composed of a water-soluble bead (READYBEADS technology) which, after being added into the sample, releases unlabeled peptides in controlled amounts. The standard meets three desired criteria: (1) it is composed of multiple peptides, at different concentration levels, allowing construction of a calibration curve covering the dynamic range of HCPs present in the target sample, ensuring quantification accuracy; (2) it demonstrates high batch-to-batch reproducibility, ensuring quantification robustness and consistency over time; and (3) it is easy to use and avoids user-induced analytical biases. In this study, we present the use of the HCP-PROFILER standard for vaccine batches comparison and downstream process performance studies.
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Affiliation(s)
- Mathieu Trauchessec
- ANAQUANT, Villeurbanne, France.,CEA, 17 av. des Martyrs, Grenoble, 38000, France
| | | | | | | | | | | | | | - Myriam Ferro
- CEA, 17 av. des Martyrs, Grenoble, 38000, France
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2
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Lecouturier V, Berry C, Saulnier A, Naville S, Manin C, Girerd-Chambaz Y, Crowe JE, Jackson N, Guy B. Characterization of recombinant yellow fever-dengue vaccine viruses with human monoclonal antibodies targeting key conformational epitopes. Vaccine 2018; 37:4601-4609. [PMID: 29706291 DOI: 10.1016/j.vaccine.2018.04.065] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 09/27/2017] [Revised: 03/27/2018] [Accepted: 04/20/2018] [Indexed: 11/16/2022]
Abstract
The recombinant yellow fever-17D-dengue virus, live, attenuated, tetravalent dengue vaccine (CYD-TDV) is licensed in several dengue-endemic countries. Although the vaccine provides protection against dengue, the level of protection differs by serotype and warrants further investigation. We characterized the antigenic properties of each vaccine virus serotype using highly neutralizing human monoclonal antibodies (hmAbs) that bind quaternary structure-dependent epitopes. Specifically, we monitored the binding of dengue virus-1 (DENV-1; 1F4), DENV-2 (2D22) or DENV-3 (5J7) serotype-specific or DENV-1-4 cross-reactive (1C19) hmAbs to the four chimeric yellow fever-dengue vaccine viruses (CYD-1-4) included in phase III vaccine formulations using a range of biochemical and functional assays (dot blot, ELISA, surface plasmon resonance and plaque reduction neutralization assays). In addition, we used the "classic" live, attenuated DENV-2 vaccine serotype, immature CYD-2 viruses and DENV-2 virus-like particles as control antigens for anti-serotype-2 reactivity. The CYD vaccine serotypes were recognized by each hmAbs with the expected specificity, moreover, surface plasmon resonance indicated a high functional affinity interaction with the CYD serotypes. In addition, the hmAbs provided similar protection against CYD and wild-type dengue viruses in the in vitro neutralization assay. Overall, these findings demonstrate that the four CYD viruses used in clinical trials display key conformational and functional epitopes targeted by serotype-specific and/or cross-reactive neutralizing human antibodies. More specifically, we showed that CYD-2 displays serotype- specific epitopes present only on the mature virus. This indicates that the CYD-TDV has the ability to elicit antibody specificities which are similar to those induced by the wild type DENV. Future investigations will be needed to address the nature of CYD-TDV-induced responses after vaccine administration, and how these laboratory markers relate to vaccine efficacy and safety.
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Affiliation(s)
- Valerie Lecouturier
- Research & Development, Sanofi Pasteur, Avenue Marcel Merieux, 69280 Marcy l'Etoile, France.
| | - Catherine Berry
- Research & Development, Sanofi Pasteur, Avenue Marcel Merieux, 69280 Marcy l'Etoile, France.
| | - Aure Saulnier
- Research & Development, Sanofi Pasteur, Avenue Marcel Merieux, 69280 Marcy l'Etoile, France.
| | - Sophie Naville
- Research & Development, Sanofi Pasteur, Avenue Marcel Merieux, 69280 Marcy l'Etoile, France.
| | - Catherine Manin
- Research & Development, Sanofi Pasteur, Avenue Marcel Merieux, 69280 Marcy l'Etoile, France.
| | - Yves Girerd-Chambaz
- Research & Development, Sanofi Pasteur, Avenue Marcel Merieux, 69280 Marcy l'Etoile, France.
| | - James E Crowe
- Vanderbilt University Medical Center, Nashville, TN, USA.
| | - Nicholas Jackson
- Research & Development, Sanofi Pasteur, Avenue Marcel Merieux, 69280 Marcy l'Etoile, France.
| | - Bruno Guy
- Research & Development, Sanofi Pasteur, Avenue Marcel Merieux, 69280 Marcy l'Etoile, France.
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3
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Bernier M, Duquesne F, Zemouri N, Akhdar M, Wendremaire P, Tiprez C, Tambat A, Manin C, Renoux MC. [Antibiotic-induced fever, does it really exist ?]. Med Mal Infect 2017; 47:356-360. [PMID: 28673697 DOI: 10.1016/j.medmal.2017.05.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 02/12/2017] [Accepted: 05/24/2017] [Indexed: 10/19/2022]
Affiliation(s)
- M Bernier
- Service de pédiatrie générale, centre hospitalier Perpignan, 20, avenue du Languedoc, 66046 Perpignan, France.
| | - F Duquesne
- Service de pédiatrie générale, centre hospitalier Perpignan, 20, avenue du Languedoc, 66046 Perpignan, France
| | - N Zemouri
- Service de pédiatrie générale, centre hospitalier Perpignan, 20, avenue du Languedoc, 66046 Perpignan, France
| | - M Akhdar
- Service de pédiatrie générale, centre hospitalier Perpignan, 20, avenue du Languedoc, 66046 Perpignan, France
| | - P Wendremaire
- Service de pédiatrie générale, centre hospitalier Perpignan, 20, avenue du Languedoc, 66046 Perpignan, France
| | - C Tiprez
- Service de pédiatrie générale, centre hospitalier Perpignan, 20, avenue du Languedoc, 66046 Perpignan, France
| | - A Tambat
- Service de pédiatrie générale, centre hospitalier Perpignan, 20, avenue du Languedoc, 66046 Perpignan, France
| | - C Manin
- Service de pédiatrie générale, centre hospitalier Perpignan, 20, avenue du Languedoc, 66046 Perpignan, France
| | - M-C Renoux
- Service de pédiatrie générale, centre hospitalier Perpignan, 20, avenue du Languedoc, 66046 Perpignan, France
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Chabaud-Riou M, Moreno N, Guinchard F, Nicolai MC, Niogret-Siohan E, Sève N, Manin C, Guinet-Morlot F, Riou P. G-protein based ELISA as a potency test for rabies vaccines. Biologicals 2017; 46:124-129. [DOI: 10.1016/j.biologicals.2017.02.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 01/27/2017] [Accepted: 02/03/2017] [Indexed: 10/20/2022] Open
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Richert L, Humbert N, Larquet E, Girerd-Chambaz Y, Manin C, Ronzon F, Mély Y. Fluorescence correlation spectroscopy as a sensitive and useful tool for revealing potential overlaps between the epitopes of monoclonal antibodies on viral particles. MAbs 2016; 8:1235-1244. [PMID: 27428887 DOI: 10.1080/19420862.2016.1212148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
Although the enzyme-linked immunosorbent assay (ELISA) is well established for quantitating epitopes on inactivated virions used as vaccines, it is less suited for detecting potential overlaps between the epitopes recognized by different antibodies raised against the virions. We used fluorescent correlation spectroscopy (FCS) to detect the potential overlaps between 3 monoclonal antibodies (mAbs 4B7-1H8-2E10, 1E3-3G4, 4H8-3A12-2D3) selected for their ability to specifically recognize poliovirus type 3. Competition of the Alexa488-labeled mAbs with non-labeled mAbs revealed that mAbs 4B7-1H8-2E10 and 4H8-3A12-2D3 compete strongly for their binding sites on the virions, suggesting an important overlap of their epitopes. This was confirmed by the cryo-electron microscopy (cryo EM) structure of the poliovirus type 3 complexed with the corresponding antigen-binding fragments (Fabs) of the mAbs, which revealed that Fabs 4B7-1H8-2E10 and 4H8-3A12-2D3 epitopes share common amino acids. In contrast, a less efficient competition between mAb 1E3-3G4 and mAb 4H8-3A12-2D3 was observed by FCS, and there was no competition between mAbs 1E3-3G4 and 4B7-1H8-2E10. The Fab 1E3-3G4 epitope was found by cryoEM to be close to but distinct from the epitopes of both Fabs 4H8-3A12-2D3 and 4B7-1H8-2E10. Therefore, the FCS data additionally suggest that mAbs 4H8-3A12-2D3 and 4B7-1H8-2E10 bind in a different orientation to their epitopes, so that only the former sterically clashes with the mAb 1E3-3G4 bound to its epitope. Our results demonstrate that FCS can be a highly sensitive and useful tool for assessing the potential overlap of mAbs on viral particles.
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Affiliation(s)
- Ludovic Richert
- a Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de Strasbourg, Faculté de Pharmacie , Illkirch , France
| | - Nicolas Humbert
- a Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de Strasbourg, Faculté de Pharmacie , Illkirch , France
| | - Eric Larquet
- b Laboratoire d'Enzymologie et Biochimie Structurales (LEBS) UPR 3082 du CNRS, Campus CNRS , Gif-sur-Yvette Cedex , France
| | | | | | | | - Yves Mély
- a Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de Strasbourg, Faculté de Pharmacie , Illkirch , France
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Rougemont B, Simon R, Carrière R, Biarc J, Fonbonne C, Salvador A, Huillet C, Berard Y, Adam O, Manin C, Lemoine J. Absolute quantification of dengue virus serotype 4 chimera vaccine candidate in Vero cell culture by targeted mass spectrometry. Proteomics 2015. [DOI: 10.1002/pmic.201500101] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Blandine Rougemont
- Institut des Sciences Analytiques; UMR 5280 CNRS Université Lyon 1; Université de Lyon; Villeurbanne France
| | - Romain Simon
- Institut des Sciences Analytiques; UMR 5280 CNRS Université Lyon 1; Université de Lyon; Villeurbanne France
| | - Romain Carrière
- Institut des Sciences Analytiques; UMR 5280 CNRS Université Lyon 1; Université de Lyon; Villeurbanne France
| | - Jordane Biarc
- Institut des Sciences Analytiques; UMR 5280 CNRS Université Lyon 1; Université de Lyon; Villeurbanne France
| | - Catherine Fonbonne
- Institut des Sciences Analytiques; UMR 5280 CNRS Université Lyon 1; Université de Lyon; Villeurbanne France
| | - Arnaud Salvador
- Institut des Sciences Analytiques; UMR 5280 CNRS Université Lyon 1; Université de Lyon; Villeurbanne France
| | - Céline Huillet
- Sanofi Pasteur; 1541 av. Marcel Mérieux Marcy l’étoile France
| | - Yves Berard
- Sanofi Pasteur; 1541 av. Marcel Mérieux Marcy l’étoile France
| | - Olivier Adam
- Sanofi Pasteur; 1541 av. Marcel Mérieux Marcy l’étoile France
| | - Catherine Manin
- Sanofi Pasteur; 1541 av. Marcel Mérieux Marcy l’étoile France
| | - Jérôme Lemoine
- Institut des Sciences Analytiques; UMR 5280 CNRS Université Lyon 1; Université de Lyon; Villeurbanne France
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Bannwarth L, Girerd-Chambaz Y, Arteni A, Guigner JM, Ronzon F, Manin C, Vénien-Bryan C. Mapping of the epitopes of poliovirus type 2 in complex with antibodies. Mol Immunol 2015; 67:233-9. [PMID: 26059753 DOI: 10.1016/j.molimm.2015.05.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [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: 12/23/2014] [Revised: 05/12/2015] [Accepted: 05/16/2015] [Indexed: 11/24/2022]
Abstract
The inactivated polio vaccine (IPV) contains poliovirus (PV) samples that belong to serotypes 1, 2 and 3. All three serotypes contain the D-antigen, which induces protective antibodies. The antigenic structure of PVs consists of at least four different antigenic sites and the D-antigen content represents the combined activity of multiple epitopes (Ferguson et al., 1993; Minor, 1990; Minor et al., 1986). The potency of IPV vaccines is determined by measuring the D-antigen content. Several ELISA methods have been developed using polyclonal or monoclonal antibodies (Mabs) in order to quantify the D-antigen content. Characterization of the epitopes recognized by the different Mabs is crucial to map the entire virus surface and ensure the presence of epitopes able to induce neutralizing antibodies. Using a new approach that we developed to study the interaction between monoclonal antibodies and poliovirus type 2, which combines cryo-electron microscopy, image analysis and X-ray crystallography along with identification of exposed amino acids, we have mapped in 3D the epitope sites recognized by three specific Fabs at the surface of poliovirus type 2 (PV2) and characterized precisely the antigenic sites for these Fabs.
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Affiliation(s)
| | | | - Ana Arteni
- IMPMC, UMR 7590, CNRS-UPMC-IRD, 75252 Paris, France
| | | | - Frederic Ronzon
- Sanofi Pasteur, 1541 av. Marcel Mérieux, F-69280 Marcy l'étoile, France
| | - Catherine Manin
- Sanofi Pasteur, 1541 av. Marcel Mérieux, F-69280 Marcy l'étoile, France
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8
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Patissier C, Akdhar M, Manin C, Rosellini D, Tambat A, Tiprez C, Wendremaire P, Renoux MC. À propos de 8 cas d’intoxication accidentelle au cannabis chez des nourrissons. Arch Pediatr 2015; 22:43-6. [DOI: 10.1016/j.arcped.2014.10.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Revised: 07/16/2014] [Accepted: 10/21/2014] [Indexed: 11/26/2022]
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9
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Bannwarth L, Girerd-Chambaz Y, Arteni AA, Guigner JM, Lemains J, Ronzon F, Manin C, Vénien-Bryan C. Structural studies of virus-antibody immune complexes (poliovirus type I): Characterization of the epitopes in 3D. Mol Immunol 2014; 63:279-86. [PMID: 25146483 DOI: 10.1016/j.molimm.2014.07.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 07/07/2014] [Accepted: 07/14/2014] [Indexed: 11/20/2022]
Abstract
The inactivated polio vaccine (IPV) contains poliovirus (PVs) samples that belong to serotypes 1, 2 and 3. All three serotypes contain the D-antigen, which induces protective antibodies. The antigenic structure of PVs consists of at least four different antigenic sites and the D-antigen content represents the combined activity of multiple epitopes (Ferguson et al., 1993; Minor, 1990; Minor et al., 1986). The potency of IPV vaccines is determined by measuring the D-antigen content. Several ELISA methods have been developed using polyclonal or monoclonal antibodies (Mabs) in order to quantify the D-antigen content. Characterization of the epitopes recognized by the different Mabs is crucial to map the entire virus surface and ensure the presence of epitopes able to induce neutralizing antibodies. In a new approach, combining cryo-electron microscopy and image analysis with X-ray crystallography data available along with identification of exposed amino acids we have mapped in 3D the epitope sites recognized by five specific Fabs and one Mab and characterized precisely the antigenic sites for these Mabs. We propose this method to be used to map the entire "epitopic" surface of virus.
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Affiliation(s)
| | | | - Ana A Arteni
- IMPMC, UMR 7590, CNRS-UPMC-IRD-MNHN, 75252 Paris, France
| | | | | | - Frédéric Ronzon
- Sanofi Pasteur, 1541 av. Marcel Mérieux, F-69280 Marcy l'étoile, France
| | - Catherine Manin
- Sanofi Pasteur, 1541 av. Marcel Mérieux, F-69280 Marcy l'étoile, France
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10
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Meslin P, Renoux MC, Manin C, Wendremaire P, Rosselini D, Tambat A, Tiprez C, Akhdar M. Une fièvre boutonneuse méditerranéenne chez un nourrisson de 2 mois. Arch Pediatr 2014; 21:772-5. [DOI: 10.1016/j.arcped.2014.04.022] [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] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Revised: 10/31/2013] [Accepted: 04/18/2014] [Indexed: 11/16/2022]
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11
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Greiner VJ, Manin C, Larquet E, Ikhelef N, Gréco F, Naville S, Milhiet PE, Ronzon F, Klymchenko A, Mély Y. Characterization of the structural modifications accompanying the loss of HBsAg particle immunogenicity. Vaccine 2014; 32:1049-54. [DOI: 10.1016/j.vaccine.2014.01.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 12/20/2013] [Accepted: 01/02/2014] [Indexed: 10/25/2022]
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12
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Grélard A, Guichard P, Bonnafous P, Marco S, Lambert O, Manin C, Ronzon F, Dufourc EJ. Hepatitis B subvirus particles display both a fluid bilayer membrane and a strong resistance to freeze drying: a study by solid‐state NMR, light scattering, and cryo‐electron microscopy/tomography. FASEB J 2013; 27:4316-26. [DOI: 10.1096/fj.13-232843] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Axelle Grélard
- Institute of Chemistry and Biology of Membranes and NanoobjectsUniversity of BordeauxChemistry and Biology of Membranes and Nanoobjects (CBMN)Unité Mixte de Recherche (UMR) 5248PessacFrance
- Institute of Chemistry and Biology of Membranes and NanoobjectsCentre National de la Recherche Scientifique (CNRS)CBMNUMR5248PessacFrance
| | - Paul Guichard
- Institut CurieCentre de RechercheOrsayFrance
- Institut National de la Santé et de la Recherche Médicale (INSERM)U759OrsayFrance
| | - Pierre Bonnafous
- Institute of Chemistry and Biology of Membranes and NanoobjectsUniversity of BordeauxChemistry and Biology of Membranes and Nanoobjects (CBMN)Unité Mixte de Recherche (UMR) 5248PessacFrance
- Institute of Chemistry and Biology of Membranes and NanoobjectsCentre National de la Recherche Scientifique (CNRS)CBMNUMR5248PessacFrance
| | - Sergio Marco
- Institut CurieCentre de RechercheOrsayFrance
- Institut National de la Santé et de la Recherche Médicale (INSERM)U759OrsayFrance
| | - Olivier Lambert
- Institute of Chemistry and Biology of Membranes and NanoobjectsUniversity of BordeauxChemistry and Biology of Membranes and Nanoobjects (CBMN)Unité Mixte de Recherche (UMR) 5248PessacFrance
- Institute of Chemistry and Biology of Membranes and NanoobjectsCentre National de la Recherche Scientifique (CNRS)CBMNUMR5248PessacFrance
| | | | | | - Erick J. Dufourc
- Institute of Chemistry and Biology of Membranes and NanoobjectsUniversity of BordeauxChemistry and Biology of Membranes and Nanoobjects (CBMN)Unité Mixte de Recherche (UMR) 5248PessacFrance
- Institut CurieCentre de RechercheOrsayFrance
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Manin C, Naville S, Gueugnon M, Dupuy M, Bravo de Alba Y, Adam O. Method for the simultaneous assay of the different poliovirus types using surface plasmon resonance technology. Vaccine 2013; 31:1034-9. [DOI: 10.1016/j.vaccine.2012.12.046] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 11/19/2012] [Accepted: 12/15/2012] [Indexed: 01/12/2023]
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14
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Moreno N, Chevalier M, Ronzon F, Manin C, Dupuy M, Krell T, Rieu JP. Unbinding forces of single pertussis toxin-antibody complexes measured by atomic force spectroscopy correlate with their dissociation rates determined by surface plasmon resonance. J Mol Recognit 2012; 24:1105-14. [PMID: 22038817 DOI: 10.1002/jmr.1159] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
An inactivated form of pertussis toxin (PTX) is the primary component of currently available acellular vaccines against Bordetella pertussis, the causative agent of whooping cough. The PTX analyzed here is purified at industrial scale and is subsequently inactivated using glutaraldehyde. The influence of this treatment on antibody recognition is of crucial importance and is analyzed in this study. Surface plasmon resonance (SPR) experiments using PTX and its inactivated form (toxoid) with 10 different monoclonal antibodies were conducted. PTX was found to recognize the antibodies with an average affinity of 1.34 ± 0.50 nM, and chemical inactivation caused only a modest decrease in affinity by a factor of approximately 4.5. However, glutaraldehyde treatment had contrary effects on the kinetic association constant k(a) and the dissociation constant k(d) . A significant reduction in k(a) was observed, whereas the dissociation of the toxoid from the bound antibody occurred slower than PTX. These data indicate that the chemical inactivation of PTX not only reduces the velocity of antibody recognition but also stabilizes the interaction with antibodies as shown by a reduction in k(d) . The same interactions were also studied by dynamic force spectroscopy (DFS). Data reveal a correlation between the k(d) values determined by SPR and the mean unbinding force as measured by DFS. The unbinding forces of one complex were determined as a function of the loading rate to directly estimate the k(d) value. Several interactions were impossible to be analyzed using SPR because of ultratight binding. Using DFS, the unbinding forces of these interactions were determined, which in turn could be used to estimate k(d) values. The use of DFS as a technique to study ultratight binding is discussed.
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Affiliation(s)
- Nadège Moreno
- Sanofi Pasteur, Bâtiment X3, 1541 avenue Marcel Mérieux, 69280, Marcy l'Etoile, France
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15
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Milhiet PE, Dosset P, Godefroy C, Le Grimellec C, Guigner JM, Larquet E, Ronzon F, Manin C. Nanoscale topography of hepatitis B antigen particles by atomic force microscopy. Biochimie 2010; 93:254-9. [PMID: 20887766 DOI: 10.1016/j.biochi.2010.09.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2010] [Accepted: 09/21/2010] [Indexed: 10/19/2022]
Abstract
Hepatitis B virus envelope is mainly composed of three forms of the same protein expressed from different start codons of the same open reading frame. The smaller form named S protein corresponds to the C-terminal common region and represents about 80% of the envelope proteins. It is mainly referred as hepatitis B virus surface antigen (HBsAg). Over expressed in the host cell, this protein can be produced as spherical and tubular self-organized particles. Highly immunogenic, these particles are used in licensed hepatitis B vaccines. In this study we have combined transmission electron microscopy and atomic force microscopy to determine the shape and size of HBsAg particles produced from the yeast Hansenula polymorpha. Tapping mode atomic force microscopy in liquid allows structural details of the surface to be delineated with a resolution in the nanometer range. Particles were decorated by closely packed spike-like structures protruding from particle surface. Protrusions appeared uniformly distributed at the surface and an average number of 75 protrusions per particle were calculated. Importantly, we demonstrated that proteins mainly contribute to the topography of the protrusions.
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16
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Greiner VJ, Egelé C, Oncul S, Ronzon F, Manin C, Klymchenko A, Mély Y. Characterization of the lipid and protein organization in HBsAg viral particles by steady-state and time-resolved fluorescence spectroscopy. Biochimie 2010; 92:994-1002. [DOI: 10.1016/j.biochi.2010.04.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2010] [Accepted: 04/19/2010] [Indexed: 11/26/2022]
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17
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Guy B, Krell T, Sanchez V, Kennel A, Manin C, Sodoyer R. Do Th1 or Th2 sequence motifs exist in proteins? Identification of amphipatic immunomodulatory domains in Helicobacter pylori catalase. Immunol Lett 2005; 96:261-75. [PMID: 15585332 DOI: 10.1016/j.imlet.2004.09.011] [Citation(s) in RCA: 15] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2004] [Revised: 08/24/2004] [Accepted: 09/06/2004] [Indexed: 11/22/2022]
Abstract
The reasons why some proteins induce a particular type of T helper (Th) response are of fundamental importance but only partially understood. In the present study, amphipatic sequence motifs were identified in N- and C-terminal domains of Helicobacter pylori (Hp) catalase, which are linked to the induction of Th1 or Th2 immune responses, respectively. Alignment of these motifs with other proteins known to induce either Th1 or Th2 responses has lead to the identification of Th1 and Th2 consensus motifs, termed modulotopes. Their immunomodulatory potential was demonstrated by immunisation experiments using recombinant proteins comprising the C-terminal domain of catalase fused with one or several modulotopes and by co-immunisations of C- or N-terminal catalase domains with peptides containing these motifs. In addition to these in vivo data, in vitro assays using Limulus extracts suggested that modulotopes might interfere with responses triggered by danger signals such as LPS. Th1 and Th2 modulotopes are characterised by a specific hydrophobic/hydrophilic pattern, which might be the structural determinant for their activity. Our data suggest that Th1 and/or Th2 motifs may generally exist on proteins, thus offering the possibility of a rational modulation of the immune response.
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Affiliation(s)
- Bruno Guy
- Research Department, Aventis Pasteur, Campus Merieux, 69280 Marcy l'Etoile, France.
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Krell T, Manin C, Nicolaï MC, Pierre-Justin C, Bérard Y, Brass O, Gérentes L, Leung-Tack P, Chevalier M. Characterization of different strains of poliovirus and influenza virus by differential scanning calorimetry. Biotechnol Appl Biochem 2005; 41:241-6. [PMID: 15377284 DOI: 10.1042/ba20040113] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [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: 11/17/2022]
Abstract
Vaccines against poliomyelitis and influenza contain inactivated forms of poliovirus and influenza virus. These antigens are generated on an industrial scale from the purified active viruses that have been analysed in this study by DSC (differential scanning calorimetry). Multiple unfolding transitions are seen for influenza virus A/New Caledonia/20/99 (H1N1), A/Panama/2007/99 (H3N2) and B/Shangdong/7/97. These data, combined with previously reported data on other influenza viruses, indicates that each influenza virus strain has a characteristic unfolding behaviour. Only minor changes were seen in the thermogram of betaPL (beta-propiolactone)-inactivated influenza virus, which is consistent with the proposition that betaPL reacts mainly with the nucleotide fraction of the virus. We demonstrate that a peak annotation of the thermogram of the native virus is possible using bromelain-treated virus and virosomes. At pH 1.5-2.5, poliovirus of type I unfolds in a single unfolding event with respective Tm (midpoint of protein unfolding transition) values between 34 and 45 degrees C. At pH 2, polioviruses of type II unfold equally in a single event, but, compared with the type I virus, with a Tm value increased by 3.7 degrees C. At neutral pH, the DSC thermogram of type I poliovirus was very 'noisy'. Data obtained offer the possibility of precisely characterizing and identifying different viral strains.
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Affiliation(s)
- Tino Krell
- Aventis Pasteur, 1541 avenue Marcel Mérieux, 69280 Marcy l'Etoile, France
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Schauder S, Penna L, Ritton A, Manin C, Parker F, Renauld-Mongénie G. Proteomics analysis by two-dimensional differential gel electrophoresis reveals the lack of a broad response of Neisseria meningitidis to in vitro-produced AI-2. J Bacteriol 2005; 187:392-5. [PMID: 15601725 PMCID: PMC538835 DOI: 10.1128/jb.187.1.392-395.2005] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [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: 11/20/2022] Open
Abstract
To investigate the effect of the autoinducer AI-2 on protein expression in Neisseria meningitidis, a luxS mutant of strain MC58 was grown in the presence and absence of in vitro-produced AI-2, and differential protein expression was assessed by two-dimensional differential gel electrophoresis. N. meningitidis did not show a global response to AI-2 signaling activity.
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Affiliation(s)
- Stephan Schauder
- Research Department, Microbiology, Aventis Pasteur, 1541 avenue Marcel Mérieux, 69280 Marcy l'Etoile, France
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Barban V, Fraysse-Corgier S, Paranhos-Baccala G, Petit M, Manin C, Berard Y, Prince AM, Mandrand B, Meulien P. Identification of a human epitope in hepatitis C virus (HCV) core protein using a molecularly cloned antibody repertoire from a non-symptomatic, anti-HCV-positive patient. J Gen Virol 2000; 81:461-9. [PMID: 10644845 DOI: 10.1099/0022-1317-81-2-461] [Citation(s) in RCA: 14] [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] [Indexed: 12/26/2022] Open
Abstract
Healthy carriers of hepatitis C virus (HCV) infection exhibit a specific antibody response against all HCV antigens, which could play a role in disease control. Generation of panels of human antibodies may permit a thorough characterization of this response and further identify particular antibodies with potential clinical value. To this effect, we have established a human phage-display antibody library from a patient exhibiting a high antibody response against HCV antigens and no clinical symptoms of disease. This library was screened against a recombinant core antigen [amino acids (aa) 1-119] produced in E. coli. Two recombinant Fab-carrying phages (rFabCs) were isolated and characterized. Both rFabC3 and rFabC14 recognize aa 1-48 on core antigen, but rFabC14 is competed out by a synthetic peptide, C(2-20) (aa 1-20), at much lower concentrations than rFabC3. In order to identify more precisely the recognition sites of these antibodies, we produced soluble forms of the rFabs (sFabs), and used them to pan a random phage-display peptide library. A single peptide sequence, QLITKPL, was identified with sFabC3, while two equally represented sequences, HAFPHLH and SAPSSKN, were isolated using sFabC14. The QLITKPL sequence was partially localized between aa 8 and 14 of core protein, but no clear homology was found for the two sFabC14 peptides. However, we confirmed the specificity of these peptides by competition experiments with sFabC14.
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Affiliation(s)
- V Barban
- Research Department, Pasteur Mérieux Connaught, 69290 Marcy l'Etoile, France.
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Manin C, Shareek F, Morosoli R, Kluepfel D. Purification and characterization of an alpha-L-arabinofuranosidase from Streptomyces lividans 66 and DNA sequence of the gene (abfA). Biochem J 1994; 302 ( Pt 2):443-9. [PMID: 8092996 PMCID: PMC1137248 DOI: 10.1042/bj3020443] [Citation(s) in RCA: 34] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The gene encoding an alpha-L-arabinofuranosidase (abfA) was homologously cloned in Streptomyces lividans and its DNA sequence was determined. The enzyme was purified from the cytoplasm of the hyperproducing clone S. lividans IAF116. Its M(r) was estimated by gel filtration and found to be approx. 380,000. Since SDS/PAGE indicated a native protein of M(r) 69,000, it can be concluded that the native protein consists of several subunits of that size. The pI value was 4.6. The kinetic constants determined with p-nitrophenyl alpha-L-arabinofuranoside as substrate were a Vmax of 180 units/mg of protein and a Km of 0.6 mM. The specific activity of the purified enzyme on this substrate was 153 units/mg of protein. Optimal enzyme activity was obtained at 60 degrees C and pH 6.0. The enzyme cleaved p-nitrophenyl alpha-L-arabinofuranoside, but had no activity on a variety of other p-nitrophenyl glycosides, except on p-nitrophenyl beta-D-xylopyranoside. The enzyme showed no activity on oat-spelts (Avena sativa) xylan or arabinogalactan, but acted on beet (Beta) arabinan or arabinoxylan. Hydrolysis occurred on arabino-oligoxylosides obtained from oat-splets xylan after digestion with xylanases. Since S. lividans normally does not secrete arabinofuranosidase, this enzyme may play a role in the assimilation of arabinose moieties from arabinose-containing xylo-oligosaccharides generated by beta-xylosidases or xylanases.
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Affiliation(s)
- C Manin
- Centre de recherche en microbiologie appliquée, Institut Armand-Frappier, Université du Québec, Laval-des-Rapides
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Moreau A, Roberge M, Manin C, Shareck F, Kluepfel D, Morosoli R. Identification of two acidic residues involved in the catalysis of xylanase A from Streptomyces lividans. Biochem J 1994; 302 ( Pt 1):291-5. [PMID: 7915112 PMCID: PMC1137222 DOI: 10.1042/bj3020291] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [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: 01/27/2023]
Abstract
On the basis of similarities between known xylanase sequences of the F family, three invariant acidic residues of xylanase A from Streptomyces lividans were investigated. Site-directed-mutagenesis experiments were carried out in Escherichia coli after engineering the xylanase A gene to allow its expression. Replacement of Glu-128 or Glu-236 by their isosteric form (Gln) completely abolished enzyme activity with xylan and p-nitrophenyl beta-D-cellobioside, indicating that the two substrates are hydrolysed at the same site. These two amino acids probably represent the catalytic residues. Immunological studies, which showed that the two mutants retained the same epitopes, indicate that the lack of activity is the result of the mutation rather than misfolding of the protein. Mutation D124E did not affect the kinetic parameters with xylan as substrate, but D124N reduced the Km 16-fold and the Vmax. 14-fold when compared with the wild-type enzyme. The mutations had a more pronounced effect with p-nitrophenyl beta-D-cellobioside as the substrate. Mutation D124E increased the Km and decreased the Vmax. 5-fold each, while D124N reduced the Km 4.5-fold and the Vmax. 75-fold. The mutations had no effect on the cleavage mode of xylopentaose.
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Affiliation(s)
- A Moreau
- Centre de Recherche en Microbiologie Appliquée, Institut Armand-Frappier, Laval, Québec, Canada
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Fouchet P, Manin C, Richard H, Frelat G, Barbotin JN. Flow cytometry studies of recombinant Escherichia coli in batch and continuous cultures: DNA and RNA contents; light-scatter parameters. Appl Microbiol Biotechnol 1994; 41:584-90. [PMID: 7519864 DOI: 10.1007/bf00178494] [Citation(s) in RCA: 10] [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] [Indexed: 01/25/2023]
Abstract
Flow cytometry has been used to study the contents of macromolecular compounds and light-scatter parameters in batch and continuous cultures of a recombinant Escherichia coli strain that forms protein inclusion bodies. Changes in relative DNA and RNA contents and cell mass as estimated by forward-angle light scatter were detected and tightly correlated in batch culture. In addition, heterogeneity of wide-angle light scatter (WALS), which we related to the presence of cellular inclusion bodies, was observed. In contrast, the relative RNA content and cell mass did not change during continuous culture, and homogeneity of WALS was found. In addition, unexpected changes in relative DNA content were observed after 67 h of culture, indicating a change in bacterial physiology.
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Affiliation(s)
- P Fouchet
- Département de Pathologie et Toxicologie Expérimentales, Centre d'Etudes Nucléaires de Fontenay aux Roses, France
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