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Bergsten E, Mestivier D, Donnadieu F, Pedron T, Barau C, Meda LT, Mettouchi A, Lemichez E, Gorgette O, Chamaillard M, Vaysse A, Volant S, Doukani A, Sansonetti PJ, Sobhani I, Nigro G. Parvimonas micra, an oral pathobiont associated with colorectal cancer, epigenetically reprograms human colonocytes. Gut Microbes 2023; 15:2265138. [PMID: 37842920 PMCID: PMC10580862 DOI: 10.1080/19490976.2023.2265138] [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: 07/27/2023] [Accepted: 09/20/2023] [Indexed: 10/17/2023] Open
Abstract
Recently, an intestinal dysbiotic microbiota with enrichment in oral cavity bacteria has been described in colorectal cancer (CRC) patients. Here, we characterize and investigate one of these oral pathobionts, the Gram-positive anaerobic coccus Parvimonas micra. We identified two phylotypes (A and B) exhibiting different phenotypes and adhesion capabilities. We observed a strong association of phylotype A with CRC, with its higher abundance in feces and in tumoral tissue compared with the normal homologous colonic mucosa, which was associated with a distinct methylation status of patients. By developing an in vitro hypoxic co-culture system of human primary colonic cells with anaerobic bacteria, we show that P. micra phylotype A alters the DNA methylation profile promoters of key tumor-suppressor genes, oncogenes, and genes involved in epithelial-mesenchymal transition. In colonic mucosa of CRC patients carrying P. micra phylotype A, we found similar DNA methylation alterations, together with significant enrichment of differentially expressed genes in pathways involved in inflammation, cell adhesion, and regulation of actin cytoskeleton, providing evidence of P. micra's possible role in the carcinogenic process.
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Affiliation(s)
- Emma Bergsten
- Unité de Pathogénie Microbienne Moléculaire, INSERM U1202, Institut Pasteur, Paris, France
- Équipe universitaire EC2M3-EA7375, Université Paris- Est (UPEC), Créteil, France
| | - Denis Mestivier
- Équipe universitaire EC2M3-EA7375, Université Paris- Est (UPEC), Créteil, France
- Plateforme de Bio-informatique, Institut Mondor de Recherche Biomédicale (IMRB/INSERM U955), Université Paris-Est, Créteil, France
| | - Francoise Donnadieu
- Unité de Pathogénie Microbienne Moléculaire, INSERM U1202, Institut Pasteur, Paris, France
| | - Thierry Pedron
- Unité de Pathogénie Microbienne Moléculaire, INSERM U1202, Institut Pasteur, Paris, France
- Unité Bactériophage, Bactérie, Hôte, Institut Pasteur, Paris, France
| | - Caroline Barau
- Plateforme de Ressources Biologiques, CHU Henri Mondor Assistance Publique Hôpitaux de Paris (APHP), Créteil, France
| | - Landry Tsoumtsa Meda
- Unité des Toxines Bactériennes, Université Paris Cité, CNRS UMR6047, INSERM U1306, Institut Pasteur, Paris, France
| | - Amel Mettouchi
- Unité des Toxines Bactériennes, Université Paris Cité, CNRS UMR6047, INSERM U1306, Institut Pasteur, Paris, France
| | - Emmanuel Lemichez
- Unité des Toxines Bactériennes, Université Paris Cité, CNRS UMR6047, INSERM U1306, Institut Pasteur, Paris, France
| | - Olivier Gorgette
- Plateforme de Bio-Imagerie Ultrastructurale, Institut Pasteur, Université Paris Cité, Paris, France
| | - Mathias Chamaillard
- Laboratory of Cell Physiology, INSERM U1003, University of Lille, Lille, France
| | - Amaury Vaysse
- Bioinformatics and Biostatistics Hub, Institut Pasteur, Université Paris Cité, Paris, France
| | - Stevenn Volant
- Bioinformatics and Biostatistics Hub, Institut Pasteur, Université Paris Cité, Paris, France
| | - Abiba Doukani
- Sorbonne Université, Inserm, Unité Mixte de Service Production et Analyse de données en Sciences de la Vie et en Santé, Paris, France
| | - Philippe J. Sansonetti
- Unité de Pathogénie Microbienne Moléculaire, INSERM U1202, Institut Pasteur, Paris, France
- Chaire de Microbiologie et Maladies Infectieuses, Collège de France, Paris, France
| | - Iradj Sobhani
- Équipe universitaire EC2M3-EA7375, Université Paris- Est (UPEC), Créteil, France
- Service de Gastroentérologie, CHU Henri Mondor Assistance Publique Hôpitaux de Paris (APHP), Créteil, France
| | - Giulia Nigro
- Unité de Pathogénie Microbienne Moléculaire, INSERM U1202, Institut Pasteur, Paris, France
- Microenvironment and Immunity Unit, INSERM U1224, Institut Pasteur, Paris, France
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2
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Uzum Z, Ershov D, Pavia MJ, Mallet A, Gorgette O, Plantard O, Sassera D, Stavru F. Three-dimensional images reveal the impact of the endosymbiont Midichloria mitochondrii on the host mitochondria. Nat Commun 2023; 14:4133. [PMID: 37438329 DOI: 10.1038/s41467-023-39758-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 06/28/2023] [Indexed: 07/14/2023] Open
Abstract
The hard tick, Ixodes ricinus, a main Lyme disease vector, harbors an intracellular bacterial endosymbiont. Midichloria mitochondrii is maternally inherited and resides in the mitochondria of I. ricinus oocytes, but the consequences of this endosymbiosis are not well understood. Here, we provide 3D images of wild-type and aposymbiotic I. ricinus oocytes generated with focused ion beam-scanning electron microscopy. Quantitative image analyses of endosymbionts and oocyte mitochondria at different maturation stages show that the populations of both mitochondrion-associated bacteria and bacterium-hosting mitochondria increase upon vitellogenisation, and that mitochondria can host multiple bacteria in later stages. Three-dimensional reconstructions show symbiosis-dependent morphologies of mitochondria and demonstrate complete M. mitochondrii inclusion inside a mitochondrion. Cytoplasmic endosymbiont located close to mitochondria are not oriented towards the mitochondria, suggesting that bacterial recolonization is unlikely. We further demonstrate individual globular-shaped mitochondria in the wild type oocytes, while aposymbiotic oocytes only contain a mitochondrial network. In summary, our study suggests that M. mitochondrii modulates mitochondrial fragmentation in oogenesis possibly affecting organelle function and ensuring its presence over generations.
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Affiliation(s)
- Zerrin Uzum
- Unit Evolutionary Biology of the Microbial Cell, Institut Pasteur; CNRS UMR2001, Paris, France.
| | - Dmitry Ershov
- Image Analysis Hub, Cell Biology and Infection Department, Institut Pasteur, Paris, France
- Bioinformatics and Biostatistics HUB, Department of Computational Biology, Institut Pasteur, USR 3756 CNRS, Paris, France
| | - Michael J Pavia
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Adeline Mallet
- Ultrastructural BioImaging Core Facility, Institut Pasteur, Paris, France
| | - Olivier Gorgette
- Ultrastructural BioImaging Core Facility, Institut Pasteur, Paris, France
| | | | - Davide Sassera
- Department of Biology and Biotechnology, University of Pavia, Pavia, Italy
| | - Fabrizia Stavru
- Unit Evolutionary Biology of the Microbial Cell, Institut Pasteur; CNRS UMR2001, Paris, France
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3
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Bonamy C, Pesnel S, Ben Haddada M, Gorgette O, Schmitt C, Morel AL, Sauvonnet N. Impact of Green Gold Nanoparticle Coating on Internalization, Trafficking, and Efficiency for Photothermal Therapy of Skin Cancer. ACS Omega 2023; 8:4092-4105. [PMID: 36743010 PMCID: PMC9893490 DOI: 10.1021/acsomega.2c07054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 12/29/2022] [Indexed: 06/18/2023]
Abstract
Skin cancer is a global health issue and mainly composed of melanoma and nonmelanoma cancers. For the first clinical proof of concept on humans, we decided to study good prognosis skin cancers, i.e., carcinoma basal cell. In UE, the first-line treatment remains surgical resection, healing most of the tumors, but presents aesthetic disadvantages with a high reoccurrence rate on exposed areas. Moreover, the therapeutic indications could extend to melanoma and metastasis, which is a different medical strategy that could combine this treatment. Indeed, patients with late-stage melanoma are in a therapeutic impasse, despite recent targeted and immunological therapies. Photothermal therapy using gold nanoparticles is the subject of many investigations due to their strong potential to treat cancers by physical, thermal destruction. We developed gold nanoparticles synthesized by green chemistry (gGNPs), using endemic plant extract from Reunion Island, which have previously showed their efficiency at a preclinical stage. Here, we demonstrate that these gGNPs are less cytotoxic than gold nanoparticles synthesized by Turkevich's method. Furthermore, our work describes the optimization of gGNP coating and stabilization, also taking into consideration the gGNP path in cells (endocytosis, intracellular trafficking, and exocytosis), their specificity toward cancerous cells, their cytotoxicity, and their in vivo efficiency. Finally, based on the metabolic switch of cancerous cells overexpressing Glut transporters in skin cancers, we demonstrated that glucose-stabilized gGNP (gGNP@G) enables a quick internalization, fourfold higher in cancerous cells in contrast to healthy cells with no side cytotoxicity, which is particularly relevant to target and treat cancer.
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Affiliation(s)
- Clément Bonamy
- Torskal, 2 rue Maxime Rivière, 97490 Sainte-Clotilde, France
- Group
Intracellular Trafficking and Tissue Homeostasis, Institut Pasteur, Université Paris Cité, 75015 Paris, France
| | - Sabrina Pesnel
- Torskal, 2 rue Maxime Rivière, 97490 Sainte-Clotilde, France
| | | | - Olivier Gorgette
- Ultrastructural
BioImaging, Institut Pasteur, Université
Paris Cité, 75015 Paris, France
| | - Christine Schmitt
- Ultrastructural
BioImaging, Institut Pasteur, Université
Paris Cité, 75015 Paris, France
| | | | - Nathalie Sauvonnet
- Group
Intracellular Trafficking and Tissue Homeostasis, Institut Pasteur, Université Paris Cité, 75015 Paris, France
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4
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Wagner MP, Formaglio P, Gorgette O, Dziekan JM, Huon C, Berneburg I, Rahlfs S, Barale JC, Feinstein SI, Fisher AB, Ménard D, Bozdech Z, Amino R, Touqui L, Chitnis CE. Human peroxiredoxin 6 is essential for malaria parasites and provides a host-based drug target. Cell Rep 2022; 39:110923. [PMID: 35705035 DOI: 10.1016/j.celrep.2022.110923] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 11/29/2021] [Revised: 03/30/2022] [Accepted: 05/17/2022] [Indexed: 11/30/2022] Open
Abstract
The uptake and digestion of host hemoglobin by malaria parasites during blood-stage growth leads to significant oxidative damage of membrane lipids. Repair of lipid peroxidation damage is crucial for parasite survival. Here, we demonstrate that Plasmodium falciparum imports a host antioxidant enzyme, peroxiredoxin 6 (PRDX6), during hemoglobin uptake from the red blood cell cytosol. PRDX6 is a lipid-peroxidation repair enzyme with phospholipase A2 (PLA2) activity. Inhibition of PRDX6 with a PLA2 inhibitor, Darapladib, increases lipid-peroxidation damage in the parasite and disrupts transport of hemoglobin-containing vesicles to the food vacuole, causing parasite death. Furthermore, inhibition of PRDX6 synergistically reduces the survival of artemisinin-resistant parasites following co-treatment of parasite cultures with artemisinin and Darapladib. Thus, PRDX6 is a host-derived drug target for development of antimalarial drugs that could help overcome artemisinin resistance.
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Affiliation(s)
- Matthias Paulus Wagner
- Institut Pasteur, Université de Paris, Malaria Parasite Biology and Vaccines Unit, Paris, France
| | - Pauline Formaglio
- Institut Pasteur, Université de Paris, Malaria Infection and Immunity Unit, Paris, France
| | - Olivier Gorgette
- Institut Pasteur, Department of Cell Biology and Infection, Centre for Innovation and Technological Research, Ultrastructural Bioimaging Unit, Paris, France
| | - Jerzy Michal Dziekan
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Christèle Huon
- Institut Pasteur, Université de Paris, Malaria Parasite Biology and Vaccines Unit, Paris, France
| | - Isabell Berneburg
- Biochemistry and Molecular Biology, Interdisciplinary Research Centre, Justus Liebig University Giessen, Giessen, Germany
| | - Stefan Rahlfs
- Biochemistry and Molecular Biology, Interdisciplinary Research Centre, Justus Liebig University Giessen, Giessen, Germany
| | - Jean-Christophe Barale
- Institut Pasteur, Université de Paris, CNRS UMR 3528, Structural Microbiology Unit, Paris, France; Institut Pasteur, Pasteur International Unit, Pasteur International Network, Malaria Translational Research Unit, Phnom Penh, Cambodia and Paris, France
| | | | - Aron B Fisher
- Peroxitech, Inc., Philadelphia, PA, USA; Institute for Environmental Medicine, Department of Physiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Didier Ménard
- Institut Pasteur, Université de Paris, INSERM U1201, Malaria Genetics and Resistance Unit, Paris, France; Dynamics of Host-Pathogen Interactions, EA 7292, IPPTS, Strasbourg University, Strasbourg, France
| | - Zbynek Bozdech
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Rogerio Amino
- Institut Pasteur, Université de Paris, Malaria Infection and Immunity Unit, Paris, France
| | - Lhousseine Touqui
- Cystic Fibrosis, Physiopathology and Phenogenomics, INSERM Unit 938, Saint-Antoine, Paris, France; Institut Pasteur, Université de Paris, Laboratory of Cystic Fibrosis and Chronic Bronchopathies, Paris, France
| | - Chetan E Chitnis
- Institut Pasteur, Université de Paris, Malaria Parasite Biology and Vaccines Unit, Paris, France.
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5
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Robinot R, Hubert M, de Melo GD, Lazarini F, Bruel T, Smith N, Levallois S, Larrous F, Fernandes J, Gellenoncourt S, Rigaud S, Gorgette O, Thouvenot C, Trébeau C, Mallet A, Duménil G, Gobaa S, Etournay R, Lledo PM, Lecuit M, Bourhy H, Duffy D, Michel V, Schwartz O, Chakrabarti LA. SARS-CoV-2 infection induces the dedifferentiation of multiciliated cells and impairs mucociliary clearance. Nat Commun 2021; 12:4354. [PMID: 34272374 PMCID: PMC8285531 DOI: 10.1038/s41467-021-24521-x] [Citation(s) in RCA: 122] [Impact Index Per Article: 40.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 06/21/2021] [Indexed: 01/08/2023] Open
Abstract
Understanding how SARS-CoV-2 spreads within the respiratory tract is important to define the parameters controlling the severity of COVID-19. Here we examine the functional and structural consequences of SARS-CoV-2 infection in a reconstructed human bronchial epithelium model. SARS-CoV-2 replication causes a transient decrease in epithelial barrier function and disruption of tight junctions, though viral particle crossing remains limited. Rather, SARS-CoV-2 replication leads to a rapid loss of the ciliary layer, characterized at the ultrastructural level by axoneme loss and misorientation of remaining basal bodies. Downregulation of the master regulator of ciliogenesis Foxj1 occurs prior to extensive cilia loss, implicating this transcription factor in the dedifferentiation of ciliated cells. Motile cilia function is compromised by SARS-CoV-2 infection, as measured in a mucociliary clearance assay. Epithelial defense mechanisms, including basal cell mobilization and interferon-lambda induction, ramp up only after the initiation of cilia damage. Analysis of SARS-CoV-2 infection in Syrian hamsters further demonstrates the loss of motile cilia in vivo. This study identifies cilia damage as a pathogenic mechanism that could facilitate SARS-CoV-2 spread to the deeper lung parenchyma.
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Grants
- Institut Pasteur
- This work was supported by : Institut Pasteur TASK FORCE SARS COV2 (TROPICORO and COROCHIP projects), DIM ELICIT Region Ile-de-France, and Agence Nationale de Recherche sur le SIDA et les Maladies Infectieuses Emergentes (ANRS; project 19052) (L.A.C.); the Vaccine Research Institute (ANR-10-LABX-77), ANRS, Labex IBEID (ANR-10-LABX-62-IBEID), the French National Research Agency (ANR; projects “TIMTAMDEN” ANR-14-CE14-0029, “CHIKV-Viro-Immuno” ANR-14-CE14-0015-01), the Gilead HIV cure program, ANR/Fondation pour la Recherche Médicale (FRM) Flash Covid PROTEO-SARS-CoV-2 and IDISCOVR (O.S.); Institut Pasteur TASK FORCE SARS COV2 and ANR Flash Covid CoVarImm (D.D.); Institut Pasteur TASK FORCE SARS COV2 (Neuro-Covid project) (H.B.). The Lledo lab is supported by the life insurance company "AG2R-La-Mondiale". The UtechS Photonic BioImaging (Imagopole) and the UtechS Ultrastructural BioImaging (UBI) are supported by the ANR (France BioImaging; ANR-10–INSB–04; Investments for the Future). R.R. is the recipient of a Sidaction fellowship, N.S. of a Pasteur-Roux-Cantarini fellowship, and St.G. of a MESR/Ecole Doctorale B3MI, Université de Paris fellowship. S.L. is supported by FRM (fellowship ECO201906009119) and by “Ecole Doctorale FIRE – Programme Bettencourt”.
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Affiliation(s)
- Rémy Robinot
- Virus & Immunity Unit, Department of Virology, Institut Pasteur, Paris, France
- UMR 3569 CNRS, Paris, France
| | - Mathieu Hubert
- Virus & Immunity Unit, Department of Virology, Institut Pasteur, Paris, France
- UMR 3569 CNRS, Paris, France
| | | | - Françoise Lazarini
- Perception and Memory Unit, Institut Pasteur, Paris, France
- UMR 3571 CNRS, Paris, France
| | - Timothée Bruel
- Virus & Immunity Unit, Department of Virology, Institut Pasteur, Paris, France
- UMR 3569 CNRS, Paris, France
| | - Nikaïa Smith
- Translational Immunology Lab, Department of Immunology, Institut Pasteur, Paris, France
| | - Sylvain Levallois
- Biology of Infection Unit, Institut Pasteur, Paris, France
- INSERM U1117, Paris, France
| | - Florence Larrous
- Lyssavirus Epidemiology and Neuropathology Unit, Institut Pasteur, Paris, France
| | - Julien Fernandes
- UtechS Photonics BioImaging, C2RT, Institut Pasteur, Paris, France
| | - Stacy Gellenoncourt
- Virus & Immunity Unit, Department of Virology, Institut Pasteur, Paris, France
- UMR 3569 CNRS, Paris, France
| | | | - Olivier Gorgette
- UtechS Ultrastructural BioImaging UBI, C2RT, Institut Pasteur, Paris, France
| | - Catherine Thouvenot
- UtechS Ultrastructural BioImaging UBI, C2RT, Institut Pasteur, Paris, France
| | - Céline Trébeau
- Institut de l'Audition, Institut Pasteur, INSERM, Paris, France
| | - Adeline Mallet
- UtechS Ultrastructural BioImaging UBI, C2RT, Institut Pasteur, Paris, France
| | - Guillaume Duménil
- UtechS Ultrastructural BioImaging UBI, C2RT, Institut Pasteur, Paris, France
| | - Samy Gobaa
- Biomaterials and Microfluidics Core Facility, Institut Pasteur, Paris, France
| | | | - Pierre-Marie Lledo
- Perception and Memory Unit, Institut Pasteur, Paris, France
- UMR 3571 CNRS, Paris, France
| | - Marc Lecuit
- Biology of Infection Unit, Institut Pasteur, Paris, France
- INSERM U1117, Paris, France
- Université de Paris, Necker-Enfants Malades University Hospital, Division of Infectious Diseases and Tropical Medicine, APHP, Institut Imagine, Paris, France
| | - Hervé Bourhy
- Lyssavirus Epidemiology and Neuropathology Unit, Institut Pasteur, Paris, France
| | - Darragh Duffy
- Translational Immunology Lab, Department of Immunology, Institut Pasteur, Paris, France
| | - Vincent Michel
- Institut de l'Audition, Institut Pasteur, INSERM, Paris, France.
| | - Olivier Schwartz
- Virus & Immunity Unit, Department of Virology, Institut Pasteur, Paris, France.
- UMR 3569 CNRS, Paris, France.
- Vaccine Research Institute, Créteil, France.
| | - Lisa A Chakrabarti
- Virus & Immunity Unit, Department of Virology, Institut Pasteur, Paris, France.
- UMR 3569 CNRS, Paris, France.
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6
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Clain E, Sinigaglia L, Koishi AC, Gorgette O, Gadea G, Viranaicken W, Krejbich-Trotot P, Mavingui P, Desprès P, Nunes Duarte Dos Santos C, Guiraud P, Jouvenet N, El Kalamouni C. Extract from Aphloia theiformis, an edible indigenous plant from Reunion Island, impairs Zika virus attachment to the host cell surface. Sci Rep 2018; 8:10856. [PMID: 30022045 PMCID: PMC6052117 DOI: 10.1038/s41598-018-29183-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [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: 02/28/2018] [Accepted: 07/06/2018] [Indexed: 01/05/2023] Open
Abstract
The mosquito-borne Zika virus (ZIKV) belongs to the flavivirus genus of the Flaviviridae family. Contemporary epidemic strains of ZIKV are associated with congenital malformations in infants, including microcephaly, as well as Guillain-Barré syndrome in adults. A risk of human-to-human transmission of ZIKV is also well documented. A worldwide research effort has been undertaken to identify safe and effective strategies to prevent or treat ZIKV infection. We show here that extract from Aphloia theiformis, an edible endemic plant from Indian Ocean islands, exerts a potent antiviral effect against ZIKV strains of African and Asian lineages, including epidemic strains. The antiviral effect of A. theiformis extract was extended to clinical isolates of dengue virus (DENV) of the four serotypes in human hepatocytes. A. theiformis inhibited virus entry in host cells by acting directly on viral particles, thus impairing their attachment to the cell surface. Electron microscopic observations revealed that organization of ZIKV particles was severely affected by A. theiformis. We propose a model of antiviral action for A. theiformis against flaviviruses that highlights the potential of medicinal plants as promising sources of naturally-derived antiviral compounds to prevent ZIKV and DENV infections.
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Affiliation(s)
- Elodie Clain
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France
| | - Laura Sinigaglia
- UMR CNRS 3569, Viral Genomics and Vaccination Unit, Pasteur Institute, 75724, Paris, France
| | - Andrea Cristine Koishi
- Laboratorio de Virologia Molecular, Instituto Carlos Chagas, ICC/FIOCRUZ/PR, Curitiba, Parana, Brazil
| | - Olivier Gorgette
- Ultrastructural BioImaging (UTechsUBI), Pasteur Institute, 75724, Paris, France
| | - Gilles Gadea
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France
| | - Wildriss Viranaicken
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France
| | - Pascale Krejbich-Trotot
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France
| | - Patrick Mavingui
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France
| | - Philippe Desprès
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France
| | | | - Pascale Guiraud
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France
| | - Nolwenn Jouvenet
- UMR CNRS 3569, Viral Genomics and Vaccination Unit, Pasteur Institute, 75724, Paris, France
| | - Chaker El Kalamouni
- Université de La Réunion, UM134 Processus Infectieux Insulaire Tropical (PIMIT), INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490, Sainte, Clotilde, France.
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7
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Gehre L, Gorgette O, Perrinet S, Prevost MC, Ducatez M, Giebel AM, Nelson DE, Ball SG, Subtil A. Sequestration of host metabolism by an intracellular pathogen. eLife 2016; 5:e12552. [PMID: 26981769 PMCID: PMC4829429 DOI: 10.7554/elife.12552] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 03/15/2016] [Indexed: 01/22/2023] Open
Abstract
For intracellular pathogens, residence in a vacuole provides a shelter against cytosolic host defense to the cost of limited access to nutrients. The human pathogen Chlamydia trachomatis grows in a glycogen-rich vacuole. How this large polymer accumulates there is unknown. We reveal that host glycogen stores shift to the vacuole through two pathways: bulk uptake from the cytoplasmic pool, and de novo synthesis. We provide evidence that bacterial glycogen metabolism enzymes are secreted into the vacuole lumen through type 3 secretion. Our data bring strong support to the following scenario: bacteria co-opt the host transporter SLC35D2 to import UDP-glucose into the vacuole, where it serves as substrate for de novo glycogen synthesis, through a remarkable adaptation of the bacterial glycogen synthase. Based on these findings we propose that parasitophorous vacuoles not only offer protection but also provide a microorganism-controlled metabolically active compartment essential for redirecting host resources to the pathogens.
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Affiliation(s)
- Lena Gehre
- Unité de Biologie cellulaire de l'infection microbienne, Institut Pasteur, Paris, France.,CNRS UMR3691, Paris, France
| | - Olivier Gorgette
- Plate-forme de Microscopie Ultrastructurale, Imagopole, Institut Pasteur, Paris, France
| | - Stéphanie Perrinet
- Unité de Biologie cellulaire de l'infection microbienne, Institut Pasteur, Paris, France.,CNRS UMR3691, Paris, France
| | | | - Mathieu Ducatez
- Unité de Glycobiologie Structurale et Fonctionnelle - CNRS UMR8576, Université de Lille, Lille, France
| | - Amanda M Giebel
- Department of Biology, Indiana University Bloomington, Bloomington, United States
| | - David E Nelson
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, United States
| | - Steven G Ball
- Unité de Glycobiologie Structurale et Fonctionnelle - CNRS UMR8576, Université de Lille, Lille, France
| | - Agathe Subtil
- Unité de Biologie cellulaire de l'infection microbienne, Institut Pasteur, Paris, France.,CNRS UMR3691, Paris, France
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8
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Moine E, Denevault-Sabourin C, Debierre-Grockiego F, Silpa L, Gorgette O, Barale JC, Jacquiet P, Brossier F, Gueiffier A, Dimier-Poisson I, Enguehard-Gueiffier C. A small-molecule cell-based screen led to the identification of biphenylimidazoazines with highly potent and broad-spectrum anti-apicomplexan activity. Eur J Med Chem 2014; 89:386-400. [PMID: 25462254 DOI: 10.1016/j.ejmech.2014.10.057] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [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: 05/26/2014] [Revised: 10/17/2014] [Accepted: 10/18/2014] [Indexed: 10/24/2022]
Abstract
An in vitro screening of the anti-apicomplexan activity of 51 compounds, stemming from our chemical library and from chemical synthesis, was performed. As a study model, we used Toxoplasma gondii (T. gondii), expressing β-galactosidase for the colorimetric assessment of drug activity on parasites cultivated in vitro. This approach allowed the validation of a new series of molecules with a biphenylimidazoazine scaffold as inhibitors of T. gondii growth in vitro. Hence, 8 molecules significantly inhibited intracellular replication of T. gondii in vitro, with EC50 < 1 μM, while being non-toxic for human fibroblasts at these concentrations. Most attractive candidates were then selected for further biological investigations on other apicomplexan parasites (Neospora caninum, Besnoitia besnoiti, Eimeria tenella and Plasmodium falciparum). Finally, two compounds were able to inhibit growth of four different apicomplexans with EC50 in the submicromolar to nanomolar range, for each parasite. These data, including the broad anti-parasite spectrum of these inhibitors, define a new generation of potential anti-parasite compounds of wide interest, including for veterinary application. Studies realized on E. tenella suggest that these molecules act during the intracellular development steps of the parasite. Further experiments should be done to identify the molecular target(s) of these compounds.
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Affiliation(s)
- Espérance Moine
- UMR INRA 1282 Infectiologie et Santé Publique, Recherche et Innovation en Chimie Médicinale, University François Rabelais of Tours, F-37200 Tours, France; UMR INRA 1282 Infectiologie et Santé Publique, Immunologie Parasitaire, Vaccinologie et Bio-thérapie Anti-infectieuse, University François Rabelais of Tours, F-37200 Tours, France
| | - Caroline Denevault-Sabourin
- UMR INRA 1282 Infectiologie et Santé Publique, Recherche et Innovation en Chimie Médicinale, University François Rabelais of Tours, F-37200 Tours, France.
| | - Françoise Debierre-Grockiego
- UMR INRA 1282 Infectiologie et Santé Publique, Immunologie Parasitaire, Vaccinologie et Bio-thérapie Anti-infectieuse, University François Rabelais of Tours, F-37200 Tours, France
| | - Laurence Silpa
- UMR INRA 1282 Infectiologie et Santé Publique, Recherche et Innovation en Chimie Médicinale, University François Rabelais of Tours, F-37200 Tours, France; UMR INRA 1282 Infectiologie et Santé Publique, Apicomplexes et Immunité des Muqueuses, INRA, F-37380 Nouzilly, France
| | - Olivier Gorgette
- Institut Pasteur, Unité d'Immunologie Moléculaire des Parasites, Département de Parasitologie et de Mycologie, F-75015 Paris, France
| | - Jean-Christophe Barale
- Institut Pasteur, Unité d'Immunologie Moléculaire des Parasites, Département de Parasitologie et de Mycologie, F-75015 Paris, France
| | - Philippe Jacquiet
- UMR 1225 INRA-National Veterinary School of Toulouse, Interactions hôtes-agents pathogènes, F-31076 Toulouse, France
| | - Fabien Brossier
- UMR INRA 1282 Infectiologie et Santé Publique, Apicomplexes et Immunité des Muqueuses, INRA, F-37380 Nouzilly, France
| | - Alain Gueiffier
- UMR INRA 1282 Infectiologie et Santé Publique, Recherche et Innovation en Chimie Médicinale, University François Rabelais of Tours, F-37200 Tours, France
| | - Isabelle Dimier-Poisson
- UMR INRA 1282 Infectiologie et Santé Publique, Immunologie Parasitaire, Vaccinologie et Bio-thérapie Anti-infectieuse, University François Rabelais of Tours, F-37200 Tours, France
| | - Cécile Enguehard-Gueiffier
- UMR INRA 1282 Infectiologie et Santé Publique, Recherche et Innovation en Chimie Médicinale, University François Rabelais of Tours, F-37200 Tours, France
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9
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Jacob D, Ruffie C, Dubois M, Combredet C, Amino R, Formaglio P, Gorgette O, Pehau-Arnaudet G, Guery C, Puijalon O, Barale JC, Ménard R, Tangy F, Sala M. Whole Pichia pastoris yeast expressing measles virus nucleoprotein as a production and delivery system to multimerize Plasmodium antigens. PLoS One 2014; 9:e86658. [PMID: 24475165 PMCID: PMC3903550 DOI: 10.1371/journal.pone.0086658] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Accepted: 12/11/2013] [Indexed: 12/13/2022] Open
Abstract
Yeasts are largely used as bioreactors for vaccine production. Usually, antigens are produced in yeast then purified and mixed with adjuvants before immunization. However, the purification costs and the safety concerns recently raised by the use of new adjuvants argue for alternative strategies. To this end, the use of whole yeast as both production and delivery system appears attractive. Here, we evaluated Pichia pastoris yeast as an alternative vaccine production and delivery system for the circumsporozoite protein (CS) of Plasmodium, the etiologic agent of malaria. The CS protein from Plasmodium berghei (Pb) was selected given the availability of the stringent C57Bl/6 mouse model of infection by Pb sporozoites, allowing the evaluation of vaccine efficacy in vivo. PbCS was multimerized by fusion to the measles virus (MV) nucleoprotein (N) known to auto-assemble in yeast in large-size ribonucleoprotein rods (RNPs). Expressed in P. pastoris, the N-PbCS protein generated highly multimeric and heterogenic RNPs bearing PbCS on their surface. Electron microscopy and immunofluorescence analyses revealed the shape of these RNPs and their localization in peripheral cytoplasmic inclusions. Subcutaneous immunization of C57Bl/6 mice with heat-inactivated whole P. pastoris expressing N-PbCS RNPs provided significant reduction of parasitemia after intradermal challenge with a high dose of parasites. Thus, in the absence of accessory adjuvants, a very low amount of PbCS expressed in whole yeast significantly decreased clinical damages associated with Pb infection in a highly stringent challenge model, providing a proof of concept of the intrinsic adjuvancy of this vaccine strategy. In addition to PbCS multimerization, the N protein contributed by itself to parasitemia delay and long-term mice survival. In the future, mixtures of whole recombinant yeasts expressing relevant Plasmodium antigens would provide a multivalent formulation applicable for antigen combination screening and possibly for large-scale production, distribution and delivery of a malaria vaccine in developing countries.
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Affiliation(s)
- Daria Jacob
- Institut Pasteur, Viral Genomics and Vaccination Unit, Paris, France
- CNRS, URA3015, Paris, France
| | - Claude Ruffie
- Institut Pasteur, Viral Genomics and Vaccination Unit, Paris, France
- CNRS, URA3015, Paris, France
| | - Myriam Dubois
- Institut Pasteur, Viral Genomics and Vaccination Unit, Paris, France
- CNRS, URA3015, Paris, France
| | - Chantal Combredet
- Institut Pasteur, Viral Genomics and Vaccination Unit, Paris, France
- CNRS, URA3015, Paris, France
| | - Rogerio Amino
- Institut Pasteur, Malaria Biology and Genetics Unit, Paris, France
| | | | - Olivier Gorgette
- Institut Pasteur, Molecular Immunology of Parasites Unit, Paris, France
- CNRS, URA2581, Paris, France
- Institut Pasteur, Malaria Biology and Genetics Unit, Team Malaria Targets and Drug Development, Paris, France
| | | | - Charline Guery
- Institut Pasteur, Viral Genomics and Vaccination Unit, Paris, France
- CNRS, URA3015, Paris, France
| | - Odile Puijalon
- Institut Pasteur, Molecular Immunology of Parasites Unit, Paris, France
- CNRS, URA2581, Paris, France
| | - Jean-Christophe Barale
- Institut Pasteur, Molecular Immunology of Parasites Unit, Paris, France
- CNRS, URA2581, Paris, France
- Institut Pasteur, Malaria Biology and Genetics Unit, Team Malaria Targets and Drug Development, Paris, France
| | - Robert Ménard
- Institut Pasteur, Malaria Biology and Genetics Unit, Paris, France
| | - Frédéric Tangy
- Institut Pasteur, Viral Genomics and Vaccination Unit, Paris, France
- CNRS, URA3015, Paris, France
| | - Monica Sala
- Institut Pasteur, Viral Genomics and Vaccination Unit, Paris, France
- CNRS, URA3015, Paris, France
- * E-mail:
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10
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Tawk L, Lacroix C, Gueirard P, Kent R, Gorgette O, Thiberge S, Mercereau-Puijalon O, Ménard R, Barale JC. A key role for Plasmodium subtilisin-like SUB1 protease in egress of malaria parasites from host hepatocytes. J Biol Chem 2013; 288:33336-46. [PMID: 24089525 DOI: 10.1074/jbc.m113.513234] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [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: 12/14/2022] Open
Abstract
In their mammalian host, Plasmodium parasites have two obligatory intracellular development phases, first in hepatocytes and subsequently in erythrocytes. Both involve an orchestrated process of invasion into and egress from host cells. The Plasmodium SUB1 protease plays a dual role at the blood stage by enabling egress of the progeny merozoites from the infected erythrocyte and priming merozoites for subsequent erythrocyte invasion. Here, using conditional mutagenesis in P. berghei, we show that SUB1 plays an essential role at the hepatic stage. Stage-specific sub1 invalidation during prehepatocytic development showed that SUB1-deficient parasites failed to rupture the parasitophorous vacuole membrane and to egress from hepatocytes. Furthermore, mechanically released parasites were not adequately primed and failed to establish a blood stage infection in vivo. The critical involvement of SUB1 in both pre-erythrocytic and erythrocytic developmental phases qualifies SUB1 as an attractive multistage target for prophylactic and therapeutic anti-Plasmodium intervention strategies.
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Affiliation(s)
- Lina Tawk
- From the Institut Pasteur, Unité d'Immunologie Moléculaire des Parasites, Département de Parasitologie et de Mycologie, F-75015 Paris, France
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11
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Bouillon A, Giganti D, Benedet C, Gorgette O, Pêtres S, Crublet E, Girard-Blanc C, Witkowski B, Ménard D, Nilges M, Mercereau-Puijalon O, Stoven V, Barale JC. In Silico screening on the three-dimensional model of the Plasmodium vivax SUB1 protease leads to the validation of a novel anti-parasite compound. J Biol Chem 2013; 288:18561-73. [PMID: 23653352 PMCID: PMC3689996 DOI: 10.1074/jbc.m113.456764] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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: 01/30/2013] [Revised: 04/03/2013] [Indexed: 12/12/2022] Open
Abstract
Widespread drug resistance calls for the urgent development of new antimalarials that target novel steps in the life cycle of Plasmodium falciparum and Plasmodium vivax. The essential subtilisin-like serine protease SUB1 of Plasmodium merozoites plays a dual role in egress from and invasion into host erythrocytes. It belongs to a new generation of attractive drug targets against which specific potent inhibitors are actively searched. We characterize here the P. vivax SUB1 enzyme and show that it displays a typical auto-processing pattern and apical localization in P. vivax merozoites. To search for small PvSUB1 inhibitors, we took advantage of the similarity of SUB1 with bacterial subtilisins and generated P. vivax SUB1 three-dimensional models. The structure-based virtual screening of a large commercial chemical compounds library identified 306 virtual best hits, of which 37 were experimentally confirmed inhibitors and 5 had Ki values of <50 μM for PvSUB1. Interestingly, they belong to different chemical families. The most promising competitive inhibitor of PvSUB1 (compound 2) was equally active on PfSUB1 and displayed anti-P. falciparum and Plasmodium berghei activity in vitro and in vivo, respectively. Compound 2 inhibited the endogenous PfSUB1 as illustrated by the inhibited maturation of its natural substrate PfSERA5 and inhibited parasite egress and subsequent erythrocyte invasion. These data indicate that the strategy of in silico screening of three-dimensional models to select for virtual inhibitors combined with stringent biological validation successfully identified several inhibitors of the PvSUB1 enzyme. The most promising hit proved to be a potent cross-inhibitor of PlasmodiumSUB1, laying the groundwork for the development of a globally active small compound antimalarial.
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Affiliation(s)
- Anthony Bouillon
- From the Institut Pasteur, Unité d'Immunologie Moléculaire des Parasites, Département de Parasitologie et de Mycologie, F-75015 Paris, France
- CNRS, URA2581, F-75015 Paris, France
| | - David Giganti
- the Institut Pasteur, Unité de Bioinformatique Structurale, Département de Biologie Structurale et Chimie, F-75015 Paris, France
- CNRS, UMR3258, F-75015 Paris, France
| | - Christophe Benedet
- the Pasteur Institute of Cambodia, Malaria Molecular Epidemiology Unit, Phnom Penh, Cambodia
| | - Olivier Gorgette
- From the Institut Pasteur, Unité d'Immunologie Moléculaire des Parasites, Département de Parasitologie et de Mycologie, F-75015 Paris, France
- CNRS, URA2581, F-75015 Paris, France
| | - Stéphane Pêtres
- the Institut Pasteur, Proteopole, Département de Biologie Structurale et Chimie, F-75015 Paris, France
| | - Elodie Crublet
- the Institut Pasteur, Proteopole, Département de Biologie Structurale et Chimie, F-75015 Paris, France
| | - Christine Girard-Blanc
- the Institut Pasteur, Proteopole, Département de Biologie Structurale et Chimie, F-75015 Paris, France
| | - Benoit Witkowski
- the Pasteur Institute of Cambodia, Malaria Molecular Epidemiology Unit, Phnom Penh, Cambodia
| | - Didier Ménard
- the Pasteur Institute of Cambodia, Malaria Molecular Epidemiology Unit, Phnom Penh, Cambodia
| | - Michael Nilges
- the Institut Pasteur, Unité de Bioinformatique Structurale, Département de Biologie Structurale et Chimie, F-75015 Paris, France
- CNRS, UMR3258, F-75015 Paris, France
| | - Odile Mercereau-Puijalon
- From the Institut Pasteur, Unité d'Immunologie Moléculaire des Parasites, Département de Parasitologie et de Mycologie, F-75015 Paris, France
- CNRS, URA2581, F-75015 Paris, France
| | - Véronique Stoven
- the Center for Computational Biology, Mines-ParisTech, Fontainebleau F-77300 France, and
- the Institut Curie, INSERM U900, F-75248 Paris, France
| | - Jean-Christophe Barale
- From the Institut Pasteur, Unité d'Immunologie Moléculaire des Parasites, Département de Parasitologie et de Mycologie, F-75015 Paris, France
- CNRS, URA2581, F-75015 Paris, France
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12
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Bastianelli G, Bouillon A, Nguyen C, Crublet E, Pêtres S, Gorgette O, Le-Nguyen D, Barale JC, Nilges M. Computational reverse-engineering of a spider-venom derived peptide active against Plasmodium falciparum SUB1. PLoS One 2011; 6:e21812. [PMID: 21818266 PMCID: PMC3144881 DOI: 10.1371/journal.pone.0021812] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2010] [Accepted: 06/13/2011] [Indexed: 12/02/2022] Open
Abstract
Background Psalmopeotoxin I (PcFK1), a protein of 33 aminoacids derived from the venom of the spider Psalmopoeus Cambridgei, is able to inhibit the growth of Plasmodium falciparum malaria parasites with an IC in the low micromolar range. PcFK1 was proposed to act as an ion channel inhibitor, although experimental validation of this mechanism is lacking. The surface loops of PcFK1 have some sequence similarity with the parasite protein sequences cleaved by PfSUB1, a subtilisin-like protease essential for egress of Plasmodium falciparum merozoites and invasion into erythrocytes. As PfSUB1 has emerged as an interesting drug target, we explored the hypothesis that PcFK1 targeted PfSUB1 enzymatic activity. Findings Molecular modeling and docking calculations showed that one loop could interact with the binding site of PfSUB1. The calculated free energy of binding averaged −5.01 kcal/mol, corresponding to a predicted low-medium micromolar constant of inhibition. PcFK1 inhibited the enzymatic activity of the recombinant PfSUB1 enzyme and the in vitro P.falciparum culture in a range compatible with our bioinformatics analysis. Using contact analysis and free energy decomposition we propose that residues A14 and Q15 are important in the interaction with PfSUB1. Conclusions Our computational reverse engineering supported the hypothesis that PcFK1 targeted PfSUB1, and this was confirmed by experimental evidence showing that PcFK1 inhibits PfSUB1 enzymatic activity. This outlines the usefulness of advanced bioinformatics tools to predict the function of a protein structure. The structural features of PcFK1 represent an interesting protein scaffold for future protein engineering.
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Affiliation(s)
- Giacomo Bastianelli
- Unité de Bioinformatique Structurale, Département de Biologie Structurale et Chimie, Paris, France
- CNRS, URA2185, Paris, France
| | - Anthony Bouillon
- Unité d'Immunologie Moleculaires des Parasites, Département de Parasitologie et de Mycologie, Paris, France
- CNRS, URA2581, Paris, France
| | | | - Elodie Crublet
- Institut Pasteur, Plate-Forme 5 - Production de Protéines Recombinantes et d'Anticorps, Paris, France
| | - Stéphane Pêtres
- Institut Pasteur, Plate-Forme 5 - Production de Protéines Recombinantes et d'Anticorps, Paris, France
| | - Olivier Gorgette
- Unité d'Immunologie Moleculaires des Parasites, Département de Parasitologie et de Mycologie, Paris, France
- CNRS, URA2581, Paris, France
| | | | - Jean-Christophe Barale
- Unité d'Immunologie Moleculaires des Parasites, Département de Parasitologie et de Mycologie, Paris, France
- CNRS, URA2581, Paris, France
| | - Michael Nilges
- Unité de Bioinformatique Structurale, Département de Biologie Structurale et Chimie, Paris, France
- CNRS, URA2185, Paris, France
- * E-mail:
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13
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Soulard V, Roland J, Gorgette O, Barbier E, Cazenave PA, Pied S. An early burst of IFN-gamma induced by the pre-erythrocytic stage favours Plasmodium yoelii parasitaemia in B6 mice. Malar J 2009; 8:128. [PMID: 19508725 PMCID: PMC2699347 DOI: 10.1186/1475-2875-8-128] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [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: 01/16/2009] [Accepted: 06/09/2009] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND In murine models of malaria, an early proinflammatory response has been associated with the resolution of blood-stage infection. To dissect the protective immune mechanism that allow the control of parasitaemia, the early immune response of C57BL/6 mice induced during a non-lethal plasmodial infection was analysed. METHODS Mice were infected with Plasmodium yoelii 265BY sporozoites, the natural invasive form of the parasite, in order to complete its full life cycle. The concentrations of three proinflammatory cytokines in the sera of mice were determined by ELISA at different time points of infection. The contribution of the liver and the spleen to this cytokinic response was evaluated and the cytokine-producing lymphocytes were identified by flow cytometry. The physiological relevance of these results was tested by monitoring parasitaemia in genetically deficient C57BL/6 mice or wild-type mice treated with anti-cytokine neutralizing antibody. Finally, the cytokinic response in sera of mice infected with parasitized-RBCs was analysed. RESULTS The early immune response of C57BL/6 mice to sporozoite-induced malaria is characterized by a peak of IFN-gamma in the serum at day 5 of infection and splenic CD4 T lymphocytes are the major producer of this cytokine at this time point. Somewhat unexpected, the parasitaemia is significantly lower in P. yoelii-infected mice in the absence of IFN-gamma. More precisely, at early time points of infection, IFN-gamma favours parasitaemia, whereas helping to clear efficiently the blood-stage parasites at later time points. Interestingly, the early IFN-gamma burst is induced by the pre-erythrocytic stage. CONCLUSION These results challenge the current view regarding the role of IFN-gamma on the control of parasite growth since they show that IFN-gamma is not an essential mediator of protection in P. yoelii-infected C57BL/6 mice. Moreover, the mice parasitaemia is more efficiently controlled in the absence of an early IFN-gamma production, suggesting that this cytokine promotes parasite's growth. Finally, this early burst of IFN-gamma is induced by the pre-erythrocytic stage, showing the impact of this stage on the immune response taking place during the subsequent erythrocytic stage.
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Affiliation(s)
- Valérie Soulard
- Unité d'Immunophysiopathologie Infectieuse, Centre National de la Recherche Scientifique (CNRS) URA 1961, Université Paris VI, Institut Pasteur, Paris, France.
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14
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Vigário AM, Gorgette O, Dujardin HC, Cruz T, Cazenave PA, Six A, Bandeira A, Pied S. Regulatory CD4+ CD25+ Foxp3+ T cells expand during experimental Plasmodium infection but do not prevent cerebral malaria. Int J Parasitol 2007; 37:963-73. [PMID: 17350019 DOI: 10.1016/j.ijpara.2007.01.004] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [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: 10/04/2006] [Revised: 01/04/2007] [Accepted: 01/05/2007] [Indexed: 12/13/2022]
Abstract
Pathogenic CD8+ T cells are implicated in the physiopathological mechanisms leading to experimental cerebral malaria (CM) in Plasmodium berghei ANKA (PbA) infected mice. Therefore, we hypothesised that in CM susceptible mice the neuropathology could be, at least in part, the result of an inefficient control of pathogenic effector T cells by CD4+ CD25+ Treg cells. Remarkably, the number of CD4+ CD25high T cells expressing Foxp3 increased in the spleen during the course of infection. These cells displayed an activated phenotype and consistent with that, CD4+ CD25high Treg cells isolated from PbA-infected mice showed an enhanced regulatory activity in vitro. Surprisingly, these cells do not migrate to the brain at the time of neurological symptoms as the conventional CD4+ T cells do. CM was not exacerbated in anti-CD25 treated mice when infected with PbA one month after treatment, even if splenic CD8+ T cells expressing CD69 increased in these mice. Taken together, these results show that P. berghei infection leads to an increase of the number of splenic CD4+ CD25high Treg cells exhibiting in vitro suppressive function, but they do not seem to be involved in vivo in the protection against CM.
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15
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Gorgette O, Existe A, Boubou MI, Bagot S, Guénet JL, Mazier D, Cazenave PA, Pied S. Deletion of T cells bearing the V beta8.1 T-cell receptor following mouse mammary tumor virus 7 integration confers resistance to murine cerebral malaria. Infect Immun 2002; 70:3701-6. [PMID: 12065512 PMCID: PMC128078 DOI: 10.1128/iai.70.7.3701-3706.2002] [Citation(s) in RCA: 10] [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] [Received: 10/30/2001] [Revised: 01/24/2002] [Accepted: 03/25/2002] [Indexed: 11/20/2022] Open
Abstract
Plasmodium berghei ANKA induces a fatal neurological syndrome known as cerebral malaria (CM) in susceptible mice. Host genetic elements are among the key factors determining susceptibility or resistance to CM. Analysis of mice of the same H-2 haplotype revealed that mouse mammary tumor virus 7 (MTV-7) integration into chromosome 1 is one of the key factors associated with resistance to neurological disease during P. berghei ANKA infection. We investigated this phenomenon by infecting a series of recombinant inbred mice (CXD2), derived from BALB/c (susceptible to CM) and DBA/2 (resistant to CM) mice, with P. berghei ANKA. We observed differences in susceptibility to CM induced by this Plasmodium strain. Mice with the MTV-7 sequence in their genome were resistant to CM, whereas those without integration of this gene were susceptible. Thus, an integrated proviral open reading frame or similar genomic sequences may confer protection against neuropathogenesis during malaria, at least in mice.
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MESH Headings
- Animals
- Disease Models, Animal
- Female
- Immunity, Innate/genetics
- Immunity, Innate/immunology
- Malaria, Cerebral/genetics
- Malaria, Cerebral/immunology
- Male
- Mammary Tumor Virus, Mouse/genetics
- Mice
- Mice, Inbred BALB C
- Mice, Inbred DBA
- Mice, Mutant Strains
- Plasmodium berghei/immunology
- Receptors, Antigen, T-Cell, alpha-beta/immunology
- T-Lymphocytes/immunology
- Virus Integration/genetics
- Virus Integration/immunology
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Affiliation(s)
- Olivier Gorgette
- Unité d'Immunophysiopathologie Infectieuse, CNRS URA 1961, Département d'Immunologie, Institut Pasteur, 75724 Paris Cedex 15, France
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16
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Bagot S, Idrissa Boubou M, Campino S, Behrschmidt C, Gorgette O, Guénet JL, Penha-Gonçalves C, Mazier D, Pied S, Cazenave PA. Susceptibility to experimental cerebral malaria induced by Plasmodium berghei ANKA in inbred mouse strains recently derived from wild stock. Infect Immun 2002; 70:2049-56. [PMID: 11895970 PMCID: PMC127853 DOI: 10.1128/iai.70.4.2049-2056.2002] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [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: 11/20/2022] Open
Abstract
The neurological syndrome caused by Plasmodium berghei ANKA in rodents partially mimics the human disease. Several rodent models of cerebral malaria (CM) exist for the study of the mechanisms that cause the disease. However, since common laboratory mouse strains have limited gene pools, the role of their phenotypic variations causing CM is restricted. This constitutes an obstacle for efficient genetic analysis relating to the pathogenesis of malaria. Most common laboratory mouse strains are susceptible to CM, and the same major histocompatibility complex (MHC) haplotype may exhibit different levels of susceptibility. We analyzed the influence of the MHC haplotype on overcoming CM by using MHC congenic mice with C57BL/10 and C3H backgrounds. No correlation was found between MHC molecules and the development of CM. New wild-derived mouse strains with wide genetic polymorphisms were then used to find new models of resistance to CM. Six of the twelve strains tested were resistant to CM. For two of them, F(1) progeny and backcrosses performed with the reference strain C57BL/6 showed a high level of heterogeneity in the number and characteristics of the genetic factors associated with resistance to CM.
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Affiliation(s)
- S Bagot
- Unité d'Immunophysiopathologie Infectieuse, CNRS URA 1961, LEA14C, and Université Pierre et Marie Curie, Institut Pasteur, 75724 Paris Cedex 15, France
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