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Deckert V, Lemaire S, Ripoll PJ, de Barros JPP, Labbé J, Borgne CCL, Turquois V, Maquart G, Larose D, Desroche N, Ménétrier F, Le Guern N, Lebrun LJ, Desrumaux C, Gautier T, Grober J, Thomas C, Masson D, Houdebine LM, Lagrost L. Recombinant human plasma phospholipid transfer protein (PLTP) to prevent bacterial growth and to treat sepsis. Sci Rep 2017; 7:3053. [PMID: 28596518 PMCID: PMC5465182 DOI: 10.1038/s41598-017-03285-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 04/25/2017] [Indexed: 12/19/2022] Open
Abstract
Although plasma phospholipid transfer protein (PLTP) has been mainly studied in the context of atherosclerosis, it shares homology with proteins involved in innate immunity. Here, we produced active recombinant human PLTP (rhPLTP) in the milk of new lines of transgenic rabbits. We successfully used rhPLTP as an exogenous therapeutic protein to treat endotoxemia and sepsis. In mouse models with injections of purified lipopolysaccharides or with polymicrobial infection, we demonstrated that rhPLTP prevented bacterial growth and detoxified LPS. In further support of the antimicrobial effect of PLTP, PLTP-knocked out mice were found to be less able than wild-type mice to fight against sepsis. To our knowledge, the production of rhPLTP to counter infection and to reduce endotoxemia and its harmful consequences is reported here for the first time. This paves the way for a novel strategy to satisfy long-felt, but unmet needs to prevent and treat sepsis.
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Affiliation(s)
- Valérie Deckert
- INSERM LNC, UMR1231, Dijon, France.,University Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.,LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France
| | - Stéphanie Lemaire
- INSERM LNC, UMR1231, Dijon, France.,University Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.,LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France.,University Hospital of Dijon, Dijon, France
| | | | - Jean-Paul Pais de Barros
- INSERM LNC, UMR1231, Dijon, France.,University Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.,LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France
| | - Jérôme Labbé
- INSERM LNC, UMR1231, Dijon, France.,University Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.,LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France
| | | | | | - Guillaume Maquart
- INSERM LNC, UMR1231, Dijon, France.,University Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.,LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France
| | | | | | - Franck Ménétrier
- CNRS UMR6265, INRA UMR1324, Centre des Sciences du Goût et de l'Alimentation, F-21000, Dijon, France
| | - Naig Le Guern
- INSERM LNC, UMR1231, Dijon, France.,University Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.,LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France
| | - Lorène J Lebrun
- INSERM LNC, UMR1231, Dijon, France.,University Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.,LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France.,AgroSup Dijon, Dijon, France
| | - Catherine Desrumaux
- LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France.,INSERM U1198, University Montpellier, Montpellier, France
| | - Thomas Gautier
- INSERM LNC, UMR1231, Dijon, France.,University Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.,LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France
| | - Jacques Grober
- INSERM LNC, UMR1231, Dijon, France.,University Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.,LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France.,AgroSup Dijon, Dijon, France
| | - Charles Thomas
- INSERM LNC, UMR1231, Dijon, France.,University Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.,LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France
| | - David Masson
- INSERM LNC, UMR1231, Dijon, France.,University Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.,LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France.,University Hospital of Dijon, Dijon, France
| | | | - Laurent Lagrost
- INSERM LNC, UMR1231, Dijon, France. .,University Bourgogne Franche-Comté, LNC UMR1231, Dijon, France. .,LipSTIC LabEx, Fondation de Coopération Scientifique Bourgogne Franche-Comté, Dijon, France. .,University Hospital of Dijon, Dijon, France.
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Gao X, Jayaraman S, Gursky O. Mild oxidation promotes and advanced oxidation impairs remodeling of human high-density lipoprotein in vitro. J Mol Biol 2007; 376:997-1007. [PMID: 18190928 DOI: 10.1016/j.jmb.2007.12.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2007] [Revised: 12/12/2007] [Accepted: 12/12/2007] [Indexed: 01/10/2023]
Abstract
High-density lipoproteins (HDLs) prevent atherosclerosis by removing cholesterol from macrophages and by exerting antioxidant and anti-inflammatory effects. Oxidation is thought to impair HDL functions, yet certain oxidative modifications may be advantageous; thus, mild oxidation reportedly enhances cell cholesterol uptake by HDL whereas extensive oxidation impairs it. To elucidate the underlying energetic and structural basis, we analyzed the effects of copper and hypochlorite (which preferentially oxidize lipids and proteins, respectively) on thermal stability of plasma spherical HDL. Circular dichroism, light scattering, calorimetry, gel electrophoresis, and electron microscopy showed that mild oxidation destabilizes HDL and accelerates protein dissociation and lipoprotein fusion, while extensive oxidation inhibits these reactions; this inhibition correlates with massive protein cross-linking and with lipolysis. We propose that mild oxidation lowers kinetic barriers for HDL remodeling due to diminished apolipoprotein affinity for lipids resulting from oxidation of methionine and aromatic residues in apolipoproteins A-I and A-II followed by protein cross-linking into dimers and/or trimers. In contrast, advanced oxidation inhibits protein dissociation and HDL fusion due to lipid redistribution from core to surface upon lipolysis and to massive protein cross-linking. Our results help reconcile the apparent controversy in the studies of oxidized HDL and suggest that mild oxidation may benefit HDL functions.
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Affiliation(s)
- Xuan Gao
- Department of Physiology and Biophysics, W329, Boston University School of Medicine, 715 Albany Street, Boston, MA 02118, USA
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