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Gallo C, Barra G, Saponaro M, Manzo E, Fioretto L, Ziaco M, Nuzzo G, d’Ippolito G, De Palma R, Fontana A. A New Bioassay Platform Design for the Discovery of Small Molecules with Anticancer Immunotherapeutic Activity. Mar Drugs 2020; 18:E604. [PMID: 33260400 PMCID: PMC7760914 DOI: 10.3390/md18120604] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 11/18/2020] [Accepted: 11/26/2020] [Indexed: 12/12/2022] Open
Abstract
Immunotherapy takes advantage of the immune system to prevent, control, and eliminate neoplastic cells. The research in the field has already led to major breakthroughs to treat cancer. In this work, we describe a platform that integrates in vitro bioassays to test the immune response and direct antitumor effects for the preclinical discovery of anticancer candidates. The platform relies on the use of dendritic cells that are professional antigen-presenting cells (APC) able to activate T cells and trigger a primary adaptive immune response. The experimental procedure is based on two phenotypic assays for the selection of chemical leads by both a panel of nine tumor cell lines and growth factor-dependent immature mouse dendritic cells (D1). The positive hits are then validated by a secondary test on human monocyte-derived dendritic cells (MoDCs). The aim of this approach is the selection of potential immunotherapeutic small molecules from natural extracts or chemical libraries.
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Affiliation(s)
- Carmela Gallo
- Bio-Organic Chemistry Unit, CNR-Institute of Biomolecular Chemistry, Via Campi Flegrei 34, 80078 Naples, Italy; (G.B.); (M.S.); (E.M.); (G.N.); (G.d.); (R.D.P.)
| | - Giusi Barra
- Bio-Organic Chemistry Unit, CNR-Institute of Biomolecular Chemistry, Via Campi Flegrei 34, 80078 Naples, Italy; (G.B.); (M.S.); (E.M.); (G.N.); (G.d.); (R.D.P.)
| | - Marisa Saponaro
- Bio-Organic Chemistry Unit, CNR-Institute of Biomolecular Chemistry, Via Campi Flegrei 34, 80078 Naples, Italy; (G.B.); (M.S.); (E.M.); (G.N.); (G.d.); (R.D.P.)
| | - Emiliano Manzo
- Bio-Organic Chemistry Unit, CNR-Institute of Biomolecular Chemistry, Via Campi Flegrei 34, 80078 Naples, Italy; (G.B.); (M.S.); (E.M.); (G.N.); (G.d.); (R.D.P.)
| | - Laura Fioretto
- Consorzio Italbiotec, Via Fantoli, 16/15, 20138 Milan, Italy;
| | - Marcello Ziaco
- BioSearch Srl., Villa Comunale c/o Stazione Zoologica “A.Dohrn”, 80121 Naples, Italy;
| | - Genoveffa Nuzzo
- Bio-Organic Chemistry Unit, CNR-Institute of Biomolecular Chemistry, Via Campi Flegrei 34, 80078 Naples, Italy; (G.B.); (M.S.); (E.M.); (G.N.); (G.d.); (R.D.P.)
| | - Giuliana d’Ippolito
- Bio-Organic Chemistry Unit, CNR-Institute of Biomolecular Chemistry, Via Campi Flegrei 34, 80078 Naples, Italy; (G.B.); (M.S.); (E.M.); (G.N.); (G.d.); (R.D.P.)
| | - Raffaele De Palma
- Bio-Organic Chemistry Unit, CNR-Institute of Biomolecular Chemistry, Via Campi Flegrei 34, 80078 Naples, Italy; (G.B.); (M.S.); (E.M.); (G.N.); (G.d.); (R.D.P.)
- Internal Medicine, Clinical Immunology and Translational Medicine, University of Genova and IRCCS-Hospital S. Martino, 16132 Genova, Italy
| | - Angelo Fontana
- Bio-Organic Chemistry Unit, CNR-Institute of Biomolecular Chemistry, Via Campi Flegrei 34, 80078 Naples, Italy; (G.B.); (M.S.); (E.M.); (G.N.); (G.d.); (R.D.P.)
- Department of Biology, University of Naples Federico II, Via Vicinale Cupa Cintia 21, 80126 Naples, Italy
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Quan Le M, Ye L, Bernasconi V, Carpentier R, Fasquelle F, Lycke N, Staeheli P, Betbeder D. Prevention of influenza virus infection and transmission by intranasal administration of a porous maltodextrin nanoparticle-formulated vaccine. Int J Pharm 2020; 582:119348. [PMID: 32325240 DOI: 10.1016/j.ijpharm.2020.119348] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 03/28/2020] [Accepted: 04/16/2020] [Indexed: 12/17/2022]
Abstract
Influenza vaccines administered intramuscularly exhibit poor mucosal immune responses in the respiratory tract which is the prime site of the infection. Intranasal vaccination is a potential route for vaccine delivery which has been demonstrated effective in inducing protective immune responses in both systemic and mucosal compartments. For this purpose, nanoparticles have been used as antigen delivery systems to improve antigen capture by immune cells. In this paper we demonstrate efficient delivery of viral antigens to airway epithelial cells, macrophages and dendritic cells, using polysaccharide nanoparticles (NPL), leading to a strong protection against influenza virus infection. A formulation combining split Udorn virus antigens with NPL and the mucosal protein adjuvant CTA1-DD was administered intranasally and resulted in an enhanced specific humoral immune response. Furthermore, NPL carrying split Udorn, with or without CTA1-DD, inhibited virus transmission from infected to uninfected naive mice. These results demonstrate that an intranasal delivery system combining NPL, mucosal adjuvant CTA1-DD and split virus antigens confers robust protection against influenza infection and inhibits virus transmission.
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Affiliation(s)
- Minh Quan Le
- Inserm, LIRIC - UMR 995, F-59 000 Lille, France; University of Lille, LIRIC - UMR 995, F-59 000 Lille, France; CHRU of Lille, LIRIC - UMR 995, F-59 000 Lille, France
| | - Liang Ye
- Institute of Virology, University Medical Center Freiburg, Freiburg, Germany
| | - Valentina Bernasconi
- Mucosal Immunobiology and Vaccine Center (MIVAC), Department of Microbiology and Immunology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Rodolphe Carpentier
- Inserm, LIRIC - UMR 995, F-59 000 Lille, France; University of Lille, LIRIC - UMR 995, F-59 000 Lille, France; CHRU of Lille, LIRIC - UMR 995, F-59 000 Lille, France.
| | - François Fasquelle
- Inserm, LIRIC - UMR 995, F-59 000 Lille, France; University of Lille, LIRIC - UMR 995, F-59 000 Lille, France; CHRU of Lille, LIRIC - UMR 995, F-59 000 Lille, France
| | - Nils Lycke
- Mucosal Immunobiology and Vaccine Center (MIVAC), Department of Microbiology and Immunology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Peter Staeheli
- Institute of Virology, University Medical Center Freiburg, Freiburg, Germany
| | - Didier Betbeder
- Inserm, LIRIC - UMR 995, F-59 000 Lille, France; University of Lille, LIRIC - UMR 995, F-59 000 Lille, France; CHRU of Lille, LIRIC - UMR 995, F-59 000 Lille, France; University of Artois, 62300 Lens, France
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3
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Lê MQ, Carpentier R, Lantier I, Ducournau C, Fasquelle F, Dimier-Poisson I, Betbeder D. Protein delivery by porous cationic maltodextrin-based nanoparticles into nasal mucosal cells: Comparison with cationic or anionic nanoparticles. Int J Pharm X 2019; 1:100001. [PMID: 31545856 PMCID: PMC6733295 DOI: 10.1016/j.ijpx.2018.100001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 11/29/2018] [Accepted: 12/06/2018] [Indexed: 12/21/2022] Open
Abstract
Different types of biodegradable nanoparticles (NPs) have been studied as delivery systems for proteins into nasal mucosal cells, especially for vaccine applications. Such a nanocarrier must have the ability to be loaded with proteins and to transport this payload into mucosal cells. However, comparative data on nanoparticles' capacity for protein loading, efficiency of subsequent endocytosis and the quantity of nanocarriers used are either lacking or contradictory, making comparisons and the choice of a best candidate difficult. Here we compared 5 types of nanoparticles with different surface charge (anionic or cationic) and various inner compositions as potential vectors: the NPL (cationic maltodextrin NP with an anionic lipid core), cationic and anionic PLGA (Poly Lactic co-Glycolic Acid) NP, and cationic and anionic liposomes. We first quantified the protein association efficiency and NPL associated the largest amount of ovalbumin, used as a model protein. In vitro, the delivery of fluorescently-labeled ovalbumin into mucosal cells (airway epithelial cells, dendritic cells and macrophages) was assessed by flow cytometry and revealed that the NPL delivered protein to the greatest extent in all 3 different cell lines. Taken together, these data underlined the potential of the porous and cationic maltodextrin-based NPL as efficient protein delivery systems to mucosal cells.
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Affiliation(s)
- Minh Quan Lê
- Inserm, LIRIC – UMR 995, F-59 000 Lille, France
- Univ Lille, LIRIC – UMR 995, F-59 045 Lille, France
- CHRU de Lille, LIRIC – UMR 995, F-59 000 Lille, France
| | - Rodolphe Carpentier
- Inserm, LIRIC – UMR 995, F-59 000 Lille, France
- Univ Lille, LIRIC – UMR 995, F-59 045 Lille, France
- CHRU de Lille, LIRIC – UMR 995, F-59 000 Lille, France
| | | | | | - François Fasquelle
- Inserm, LIRIC – UMR 995, F-59 000 Lille, France
- Univ Lille, LIRIC – UMR 995, F-59 045 Lille, France
- CHRU de Lille, LIRIC – UMR 995, F-59 000 Lille, France
| | | | - Didier Betbeder
- Inserm, LIRIC – UMR 995, F-59 000 Lille, France
- Univ Lille, LIRIC – UMR 995, F-59 045 Lille, France
- CHRU de Lille, LIRIC – UMR 995, F-59 000 Lille, France
- Université d’Artois, 62300 Lens, France
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4
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Débare H, Schmidt J, Moiré N, Ducournau C, Acosta Paguay YD, Schwarz RT, Dimier-Poisson I, Debierre-Grockiego F. In vitro cellular responses to Neospora caninum glycosylphosphatidylinositols depend on the host origin of antigen presenting cells. Cytokine 2019; 119:119-128. [PMID: 30909148 DOI: 10.1016/j.cyto.2019.03.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 03/08/2019] [Accepted: 03/19/2019] [Indexed: 01/12/2023]
Abstract
Neosporosis due to Neospora caninum causes abortions in farm animals such as cattle. No treatment and vaccine exist to fight this disease, responsible for considerable economic losses. It is thus important to better understand the immune responses occurring during the pathogenesis to control them in a global strategy against the parasite. In this context, we studied the roles of N. caninum glycosylphosphatidylinositols (GPIs), glycolipids defined as toxins in the related parasite Plasmodium falciparum. We demonstrated for the first time that GPIs could be excreted in the supernatant of N. caninum culture and trigger cell signalling through the Toll-like receptors 2 and 4. In addition, antibodies specific to N. caninum GPIs were detected in the serum of infected mice. As shown for other protozoan diseases, they could play a role in neutralizing GPIs. N. caninum GPIs were able to induce the production of tumour necrosis factor-α, interleukin(IL)-1β and IL-12 cytokines by murine macrophages and dendritic cells. Furthermore, GPIs significantly reduced expression of major histocompatibility complex (MHC) molecules of class I on murine dendritic cells. In contrast to murine cells, bovine blood mononuclear cells produced increased levels of IFN-γ and IL-10, but reduced levels of IL-12p40 in response to GPIs. On these bovine cells, GPI had the tendency to up-regulate MHC class I, but to down-regulate MHC class II. Altogether, these results suggest that N. caninum GPIs might differentially participate in the responses of antigen presenting cells induced by the whole parasite in mouse models of neosporosis and in the natural cattle host.
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Affiliation(s)
| | - Jörg Schmidt
- Institut für Virologie, AG Parasitologie, Philipps-Universität Marburg, 35043 Marburg, Germany
| | | | | | - Yoshuá D Acosta Paguay
- Laboratorio de Virología-inmunología de la carrera de Ingeniería en Biotecnología, Universidad de las Fuerzas Armadas ESPE, 171103 Sangolquí, Ecuador
| | - Ralph T Schwarz
- Institut für Virologie, AG Parasitologie, Philipps-Universität Marburg, 35043 Marburg, Germany; Univ. Lille, CNRS, UMR 8576, Unité de Glycobiologie Structurale et Fonctionnelle, 59655 Villeneuve d'Ascq, France
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5
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de Oliveira PG, Gomes CM, Ávila LR, Ribeiro-Dias F, Leenen PJM, de Oliveira MAP. Dendritic cell line AP284 supports Th17 amplification. Cell Immunol 2019; 337:54-61. [PMID: 30773217 DOI: 10.1016/j.cellimm.2019.02.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/22/2019] [Accepted: 02/08/2019] [Indexed: 12/24/2022]
Abstract
Dendritic cells (DC) have the unique ability to capture microorganisms and activate naive T lymphocytes. Obtaining DC derived from progenitors demands high cost and prolonged cultivation. Different immortalized DC has been isolated but most of them have immature phenotype and depending on growing factors or other stimuli to be used. In this study we characterized the cell line AP284 as a DC. AP284 cells express high levels of CD11b, MHC class II, 33D1 and CD209b. They also express high amounts of CD80 costimulatory molecule and different toll like receptors (TLR). After stimuli with TLR agonist they produce surprising amount of IL-12p40 related to IL-23 formation but not IL-12p70. They are also able to produce IL-6 and favor amplification of a Th17 but not Th1 profile. This DC line may be useful for a better understanding of factors and cellular interactions responsible for the induction of IL-12p40, IL-23 and Th17 generation.
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Affiliation(s)
- Pollyana Guimarães de Oliveira
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Rua 235 S/N, Goiânia, Goiás 74605-050, Brazil
| | - Clayson Moura Gomes
- Pontifícia Universidade Católica de Goiás, Av, Universitária 1069, Setor Universitário, Goiânia, Goiás 74605-010, Brazil
| | - Lucilla Ribeiro Ávila
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Rua 235 S/N, Goiânia, Goiás 74605-050, Brazil; UniCerrado - Centro Universitário de Goiatuba, Rodovia GO320, S/N - Jardim Santa Paula, Goiatuba, Goiás 75600-000, Brazil
| | - Fatima Ribeiro-Dias
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Rua 235 S/N, Goiânia, Goiás 74605-050, Brazil
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6
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Le MQ, Carpentier R, Lantier I, Ducournau C, Dimier-Poisson I, Betbeder D. Residence time and uptake of porous and cationic maltodextrin-based nanoparticles in the nasal mucosa: Comparison with anionic and cationic nanoparticles. Int J Pharm 2018; 550:316-324. [PMID: 30171898 DOI: 10.1016/j.ijpharm.2018.08.054] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 08/23/2018] [Accepted: 08/28/2018] [Indexed: 12/20/2022]
Abstract
Different types of biodegradable nanoparticles (NP) have been studied as nasal mucosa cell delivery systems. These nanoparticles need to strongly interact with mucosa cells to deliver their payload. However, only a few simultaneous comparisons have been made and it is therefore difficult to determine the best candidate. Here we compared 5 types of nanoparticles with different surface charge (anionic or cationic) and various inner compositions as potential vectors: cationic and anionic liposomes, cationic and anionic PLGA (Poly Lactic co-Glycolic Acid) NP and porous and cationic maltodextrin NP (cationic surface with an anionic lipid core: NPL). We first quantified their nasal residence time after nasal administration in mice using in vivo live imaging and NPL showed the longest residence time. In vitro endocytosis on mucosal cells (airway epithelial cells, macrophages and dendritic cells) using labeled nanoparticles were performed by flow cytometry and confocal microscopy. Among the 5 nanoparticles, NPL were taken up to the greatest extent by the 3 different cell lines and the endocytosis mechanisms were characterized. Taken together, we observed that the nanoparticles' cationic surface charge is insufficient to improve mucosal residence time and cellular uptake and that the NPL are the best candidates to interact with airway mucosal cells.
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Affiliation(s)
- Minh Quan Le
- Inserm, LIRIC - UMR 995, F-59 000 Lille, France; Univ Lille, LIRIC - UMR 995, F-59 045 Lille, France; CHRU de Lille, LIRIC - UMR 995, F-59 000 Lille, France
| | - Rodolphe Carpentier
- Inserm, LIRIC - UMR 995, F-59 000 Lille, France; Univ Lille, LIRIC - UMR 995, F-59 045 Lille, France; CHRU de Lille, LIRIC - UMR 995, F-59 000 Lille, France.
| | | | | | | | - Didier Betbeder
- Inserm, LIRIC - UMR 995, F-59 000 Lille, France; Univ Lille, LIRIC - UMR 995, F-59 045 Lille, France; CHRU de Lille, LIRIC - UMR 995, F-59 000 Lille, France; Université d'Artois, 62300 Lens, France
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7
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Pigni M, Ashok D, Stevanin M, Acha-Orbea H. Establishment and Characterization of a Functionally Competent Type 2 Conventional Dendritic Cell Line. Front Immunol 2018; 9:1912. [PMID: 30197645 PMCID: PMC6117413 DOI: 10.3389/fimmu.2018.01912] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 08/02/2018] [Indexed: 12/24/2022] Open
Abstract
Dendritic cells (DCs) are the most potent antigen presenting cells and possess an incomparable ability to activate and instruct T cells, which makes them one of the cornerstones in the regulation of the cross-talk between innate and adaptive immunity. Therefore, a deep understanding of DC biology lays the foundations to describe and to harness the mechanisms that regulate the development of the adaptive response, with clear implications in a vast array of fields such as the study of autoimmune diseases and the development of new vaccines. However, the great difficulty to obtain large quantities of viable non-activated DCs for experimentation have considerably hindered the progress of DC research. Several strategies have been proposed to overcome these limitations by promoting an increase of DC abundance in vivo, by inducing DC development from DC progenitors in vitro and by generating stable DC lines. In the past years, we have described a method to derive immortalized stable DC lines, named MutuDCs, from the spleens of Mushi1 mice, a transgenic mouse strain that express the simian virus 40 Large T-oncogene in the DCs. The comparison of these DC lines with the vast variety of DC subsets described in vivo has shown that all the MutuDC lines that we have generated so far have phenotypic and functional features of type 1 conventional DCs (cDC1s). With the purpose of deriving DC lines with characteristics of type 2 conventional DCs (cDC2s), we bred a new Batf3-/- Mushi1 murine line in which the development of the cDC1 subset is severely defective. The new MutuDC line that we generated from Batf3-/- Mushi1 mice was phenotypically and functionally characterized in this work. Our results demonstrated that all the tested characteristics of this new cell line, including the expression of subset-determining transcription factors, the profile of cytokine production and the ability to present antigens, are comparable with the features of splenic CD4- cDC2s. Therefore, we concluded that our new cell line, that we named CD4- MutuDC2 line, represents a valuable model for the CD4- cDC2 subset.
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Affiliation(s)
| | | | | | - Hans Acha-Orbea
- Department of Biochemistry CIIL, University of Lausanne, Épalinges, Switzerland
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8
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Dégbé M, Debierre-Grockiego F, Tété-Bénissan A, Débare H, Aklikokou K, Dimier-Poisson I, Gbeassor M. Extracts of Tectona grandis and Vernonia amygdalina have anti-Toxoplasma and pro-inflammatory properties in vitro. ACTA ACUST UNITED AC 2018. [PMID: 29533762 PMCID: PMC5849417 DOI: 10.1051/parasite/2018014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Tectona grandis (teak) and Vernonia amygdalina (bitter leaf) are plants used in traditional medicine in West Africa. In this study, we tested ethanolic and hydro-ethanolic extracts of bark and leaves of T. grandis and ethanolic extract of leaves of V. amygdalina for their inhibitory effect on Toxoplasma gondii, a protozoan parasite responsible for toxoplasmosis. Ethanolic extract of V. amygdalina leaves had proportional contents of phenols, tannins, flavonoids, and polysaccharides. This extract presented the highest efficacy against T. gondii, the lowest cytotoxicity to mammalian cells, but moderate anti-oxidant activity compared to other plant extracts. Ethanolic extract of T. grandis bark also had elevated anti-T. gondii activity, low cytotoxicity on mammalian cells, and one of the highest anti-oxidant activities. However, the phytochemical content of this extract was not very different from the hydro-ethanolic extract, which had no anti-T. gondii activity. In addition, ethanolic extract of V. amygdalina leaves, but not of T. grandis bark, significantly increased the production of TNF-α and NO by antigen-presenting cells. Both extracts had the tendency to decrease expression of major histocompatibility complex molecules at the surface of antigen-presenting cells, while they did not modulate the percentage of apoptotic cells. A study of signalling pathways would help to determine the mechanisms of action of these plant extracts.
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Affiliation(s)
- Mlatovi Dégbé
- Laboratoire de Physiologie et de Pharmacologie des Substances Naturelles, Faculté des Sciences, Université de Lomé, B.P. 1515, Lomé 01, Togo
| | | | - Amivi Tété-Bénissan
- Laboratoire de Physiologie et de Pharmacologie des Substances Naturelles, Faculté des Sciences, Université de Lomé, B.P. 1515, Lomé 01, Togo
| | | | - Kodjo Aklikokou
- Laboratoire de Physiologie et de Pharmacologie des Substances Naturelles, Faculté des Sciences, Université de Lomé, B.P. 1515, Lomé 01, Togo
| | | | - Messanvi Gbeassor
- Laboratoire de Physiologie et de Pharmacologie des Substances Naturelles, Faculté des Sciences, Université de Lomé, B.P. 1515, Lomé 01, Togo
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9
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Leithner A, Renkawitz J, De Vries I, Hauschild R, Häcker H, Sixt M. Fast and efficient genetic engineering of hematopoietic precursor cells for the study of dendritic cell migration. Eur J Immunol 2018; 48:1074-1077. [PMID: 29436709 DOI: 10.1002/eji.201747358] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 01/03/2018] [Accepted: 02/01/2018] [Indexed: 12/29/2022]
Abstract
Estrogen inducible Hoxb8 leads to conditional immortalization of hematopoietic precursors. These cells can be cultured and infected with the CRISPR/Cas9 system for genome editing, circumventing resource consuming generation of mouse models. The resultant cells retain their ability to differentiate into migratory dendritic cells.
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Affiliation(s)
- Alexander Leithner
- Institute of Science and Technology Austria, Am Campus 1, Klosterneuburg, Austria
| | - Joerg Renkawitz
- Institute of Science and Technology Austria, Am Campus 1, Klosterneuburg, Austria
| | - Ingrid De Vries
- Institute of Science and Technology Austria, Am Campus 1, Klosterneuburg, Austria
| | - Robert Hauschild
- Institute of Science and Technology Austria, Am Campus 1, Klosterneuburg, Austria
| | - Hans Häcker
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Michael Sixt
- Institute of Science and Technology Austria, Am Campus 1, Klosterneuburg, Austria
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10
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Bragazzi Cunha J, Wobus CE. Select membrane proteins modulate MNV-1 infection of macrophages and dendritic cells in a cell type-specific manner. Virus Res 2016; 222:64-70. [PMID: 27264433 DOI: 10.1016/j.virusres.2016.06.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 05/31/2016] [Accepted: 06/01/2016] [Indexed: 10/21/2022]
Abstract
Noroviruses cause gastroenteritis in humans and other animals, are shed in the feces, and spread through the fecal-oral route. Host cellular expression of attachment and entry receptors for noroviruses is thought to be a key determinant of cell tropism and the strict species-specificity. However, to date, only carbohydrates have been identified as attachment receptors for noroviruses. Thus, we investigated whether host cellular proteins play a role during the early steps of norovirus infection. We used murine norovirus (MNV) as a representative norovirus, since MNV grows well in tissue culture and is a frequently used model to study basic aspects of norovirus biology. Virus overlay protein binding assay followed by tandem mass spectrometry analysis was performed in two permissive cell lines, RAW264.7 (murine macrophages) and SRDC (murine dendritic cells) to identify four cellular membrane proteins as candidates. Loss-of-function studies revealed that CD36 and CD44 promoted MNV-1 binding to primary dendritic cells, while CD98 heavy chain (CD98) and transferrin receptor 1 (TfRc) facilitated MNV-1 binding to RAW 264.7 cells. Furthermore, the VP1 protruding domain of MNV-1 interacted directly with the extracellular domains of recombinant murine CD36, CD98 and TfRc by ELISA. Additionally, MNV-1 infection of RAW 264.7 cells was enhanced by soluble rCD98 extracellular domain. These studies demonstrate that multiple membrane proteins can promote efficient MNV-1 infection in a cell type-specific manner. Future studies are needed to determine the molecular mechanisms by which each of these proteins affect the MNV-1 infectious cycle.
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Affiliation(s)
- Juliana Bragazzi Cunha
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48109-5620, USA
| | - Christiane E Wobus
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48109-5620, USA.
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11
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Pigni M, Ashok D, Acha-Orbea H. Derivation and Utilization of Functional CD8(+) Dendritic Cell Lines. Methods Mol Biol 2016; 1423:39-49. [PMID: 27142007 DOI: 10.1007/978-1-4939-3606-9_3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
It is notoriously difficult to obtain large quantities of non-activated dendritic cells ex vivo. For this reason, we produced and characterized a mouse model expressing the large T oncogene under the CD11c promoter (Mushi mice), in which CD8α(+) dendritic cells transform after 4 months. We derived a variety of stable cell lines from these primary lines. These cell lines reproducibly share with freshly isolated dendritic cells most surface markers, mRNA and protein expression, and all tested biological functions. Cell lines can be derived from various strains and knockout mice and can be easily transduced with lentiviruses. In this article, we describe the derivation, culture, and lentiviral transduction of these dendritic cell lines.
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Affiliation(s)
- Matteo Pigni
- Department of Biochemistry CIIL, University of Lausanne, Chemin des Boveresses 155, CH-1066, Epalinges, Switzerland
| | - Devika Ashok
- Department of Biochemistry CIIL, University of Lausanne, Chemin des Boveresses 155, CH-1066, Epalinges, Switzerland
| | - Hans Acha-Orbea
- Department of Biochemistry CIIL, University of Lausanne, Chemin des Boveresses 155, CH-1066, Epalinges, Switzerland.
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12
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Hargadon KM. Murine and Human Model Systems for the Study of Dendritic Cell Immunobiology. Int Rev Immunol 2014; 35:85-115. [DOI: 10.3109/08830185.2014.952413] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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13
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Hwang S, Alhatlani B, Arias A, Caddy SL, Christodoulou C, Cunha JB, Emmott E, Gonzalez-Hernandez M, Kolawole A, Lu J, Rippinger C, Sorgeloos F, Thorne L, Vashist S, Goodfellow I, Wobus CE. Murine norovirus: propagation, quantification, and genetic manipulation. ACTA ACUST UNITED AC 2014; 33:15K.2.1-61. [PMID: 24789596 DOI: 10.1002/9780471729259.mc15k02s33] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Murine norovirus (MNV) is a positive-sense, plus-stranded RNA virus in the Caliciviridae family. It is the most common pathogen in biomedical research colonies. MNV is also related to the human noroviruses, which cause the majority of nonbacterial gastroenteritis worldwide. Like the human noroviruses, MNV is an enteric virus that replicates in the intestine and is transmitted by the fecal-oral route. MNV replicates in murine macrophages and dendritic cells in cells in culture and in the murine host. This virus is often used to study mechanisms in norovirus biology, because human noroviruses are refractory to growth in cell culture. MNV combines the availability of a cell culture and reverse genetics system with the ability to study infection in the native host. Herein, we describe a panel of techniques that are commonly used to study MNV biology.
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Affiliation(s)
- Seungmin Hwang
- Department of Pathology, University of Chicago, Chicago, Illinois
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14
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Pavot V, Rochereau N, Primard C, Genin C, Perouzel E, Lioux T, Paul S, Verrier B. Encapsulation of Nod1 and Nod2 receptor ligands into poly(lactic acid) nanoparticles potentiates their immune properties. J Control Release 2013; 167:60-7. [DOI: 10.1016/j.jconrel.2013.01.015] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 01/09/2013] [Accepted: 01/10/2013] [Indexed: 01/01/2023]
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15
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Quéré P, Pierre J, Hoang MD, Esnault E, Domenech J, Sibille P, Dimier-Poisson I. Presence of dendritic cells in chicken spleen cell preparations and their functional interaction with the parasite Toxoplasma gondii. Vet Immunol Immunopathol 2013; 153:57-69. [PMID: 23477930 DOI: 10.1016/j.vetimm.2013.02.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 01/18/2013] [Accepted: 02/06/2013] [Indexed: 10/27/2022]
Abstract
Toxoplasmosis is a worldwide epizootic disease of mammals. Chickens, albeit being less susceptible, can be contaminated in free-range flocks and may have an important role in parasite transmission. Plastic adherence selection of chicken spleen cells enriched 8F2+ (putative chicken CD11c) MHC II+ cells of the myeloid type; however, we did not succeed to separate dendritic cells from macrophages using their feature to become loosely adherent after culture as in mammals. Still we clearly identified dendritic-like cells being morphologically distinguishable from macrophages in the KUL01 (macrophage marker) negative fraction, exhibiting responsiveness to LPS and parasite extracts by developing characteristic cellular protrusions as well as a minor phagocytic incorporation of dead parasites. Live T. gondii tachyzoites were able to invade the two different types of myeloid adherent cells, to replicate, and to induce an overall decrease in the expression of MHC II and co-stimulatory molecules, CD80 and CD40. Our data indicate that dendritic cells in addition to macrophages may have a role in hiding viable replicating T. gondii tachyzoites from the immune system and in shuttling them to different organs in the chicken as previously described for different Apicomplexa infecting mammals.
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Affiliation(s)
- Pascale Quéré
- INRA, UMR1282 Infectiologie et Santé Publique, Equipe PIA, 37380 Nouzilly, France.
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16
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Fuertes Marraco SA, Grosjean F, Duval A, Rosa M, Lavanchy C, Ashok D, Haller S, Otten LA, Steiner QG, Descombes P, Luber CA, Meissner F, Mann M, Szeles L, Reith W, Acha-Orbea H. Novel murine dendritic cell lines: a powerful auxiliary tool for dendritic cell research. Front Immunol 2012; 3:331. [PMID: 23162549 PMCID: PMC3491238 DOI: 10.3389/fimmu.2012.00331] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Accepted: 10/18/2012] [Indexed: 11/13/2022] Open
Abstract
Research in vitro facilitates discovery, screening, and pilot experiments, often preceding research in vivo. Several technical difficulties render Dendritic Cell (DC) research particularly challenging, including the low frequency of DC in vivo, thorough isolation requirements, and the vulnerability of DC ex vivo. Critically, there is not as yet a widely accepted human or murine DC line and in vitro systems of DC research are limited. In this study, we report the generation of new murine DC lines, named MutuDC, originating from cultures of splenic CD8α conventional DC (cDC) tumors. By direct comparison to normal WT splenic cDC subsets, we describe the phenotypic and functional features of the MutuDC lines and show that they have retained all the major features of their natural counterpart in vivo, the splenic CD8α cDC. These features include expression of surface markers Clec9A, DEC205, and CD24, positive response to TLR3 and TLR9 but not TLR7 stimuli, secretion of cytokines, and chemokines upon activation, as well as cross-presentation capacity. In addition to the close resemblance to normal splenic CD8α cDC, a major advantage is the ease of derivation and maintenance of the MutuDC lines, using standard culture medium and conditions, importantly without adding supplementary growth factors or maturation-inducing stimuli to the medium. Furthermore, genetically modified MutuDC lines have been successfully obtained either by lentiviral transduction or by culture of DC tumors originating from genetically modified mice. In view of the current lack of stable and functional DC lines, these novel murine DC lines have the potential to serve as an important auxiliary tool for DC research.
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Affiliation(s)
- Silvia A Fuertes Marraco
- Department of Biochemistry, Center of Immunity and Infection Lausanne, University of Lausanne Epalinges, Switzerland
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17
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Dion S, Germon S, Guiton R, Ducournau C, Dimier-Poisson I. Functional activation of T cells by dendritic cells and macrophages exposed to the intracellular parasite Neospora caninum. Int J Parasitol 2011; 41:685-95. [PMID: 21329692 DOI: 10.1016/j.ijpara.2011.01.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 01/05/2011] [Accepted: 01/18/2011] [Indexed: 11/18/2022]
Abstract
Neospora caninum is an intracellular protozoan pathogen that causes abortion in cattle. We studied how the interaction between murine conventional dendritic cells or macrophages and N. caninum influences the generation of cell-mediated immunity against the parasite. We first explored the invasion and survival ability of N. caninum in dendritic cells and macrophages. We observed that protozoa rapidly invaded and proliferated into these two cell populations. We then investigated how Neospora-exposed macrophages or dendritic cells distinguish between viable and non-viable (heat-killed tachyzoites and antigenic extract) parasites. Viable tachyzoites and antigenic extract, but not killed parasites, altered the phenotype of immature dendritic cells. Dendritic cells infected with viable parasites down-regulated the expression of MHC-II, CD40, CD80 and CD86 whereas dendritic cells exposed to N. caninum antigenic extract up-regulated the expression of MHC-II and CD40 and down-regulated CD80 and CD86 expression. Moreover, only viable tachyzoites and antigenic extract induced IL-12 synthesis by dendritic cells. MHC-II expression was up-regulated and CD86 expression was down-regulated at the surface of macrophages, regardless of the parasitic form was encountered. However, IL-12 secretion by macrophages was only observed under conditions using viable and heat-killed parasite. We then analysed how macrophages and dendritic cells were involved in inducing T-cell responses. T lymphocyte IFN-γ-secretion in correlation with IL-12 production occurred after interactions between T cells and dendritic cells exposed to viable tachyzoites or antigenic extract. By contrast, for macrophages IFN-γ production was IL-12-independent and only occurred after interactions between T cells and macrophages exposed to antigenic extract. Thus, N. caninum-induced activation of murine dendritic cells, but not that of macrophages, was associated with T cell IFN-γ production after IL-12 secretion.
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Affiliation(s)
- Sarah Dion
- Université François-Rabelais de Tours, INRA, UMR 0483 Université-INRA d'Immunologie Parasitaire, Vaccinologie et Biothérapie Anti-Infectieuse, IFR des Agents Transmissibles et Infectiologie, UFR de Pharmacie, Tours, France
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18
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GUITON R, ZAGANI R, DIMIER-POISSON I. Major role for CD8+T cells in the protection againstToxoplasma gondiifollowing dendritic cell vaccination. Parasite Immunol 2009; 31:631-40. [DOI: 10.1111/j.1365-3024.2009.01146.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Aline F, Brand D, Pierre J, Roingeard P, Séverine M, Verrier B, Dimier-Poisson I. Dendritic cells loaded with HIV-1 p24 proteins adsorbed on surfactant-free anionic PLA nanoparticles induce enhanced cellular immune responses against HIV-1 after vaccination. Vaccine 2009; 27:5284-91. [PMID: 19450633 DOI: 10.1016/j.vaccine.2009.05.028] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2009] [Revised: 05/06/2009] [Accepted: 05/10/2009] [Indexed: 01/07/2023]
Abstract
Biodegradable nanoparticles with surface adsorbed antigens represent a promising method for in vivo delivery of vaccines targeting a wide range of infectious diseases or cancers. We investigated the feasibility of loading dendritic cells with a vaccine antigen, HIV p24 protein, on the surface of surfactant-free anionic (d,l-lactic acid, PLA) nanoparticles. The p24 protein had a high affinity for the nanoparticles and the antigenicity and immunogenicity of the p24 protein on the nanoparticle was well preserved after immunization. p24-coated nanoparticles were efficiently taken up by mouse dendritic cells (DCs), inducing DC maturation by increasing MHC-I, MHC-II, CD40, CD80 and CD86 surface expression and secreting IL-12 (p70) and IL-4. We evaluated the ability of DCs pulsed with p24-coated nanoparticles to elicit an optimal humoral and cellular immune response in the blood and intestine. DCs pulsed with p24-nanoparticles induced high seric and mucosal antibody production and elicited strong systemic and local lymproliferative responses, correlated with a Th1/Th2-type response, and systemic CTL responses in mice. Thus, DCs pulsed with antigen-loaded PLA nanoparticles may provide a novel delivery tool for cell therapy vaccination against chronic infectious diseases.
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Affiliation(s)
- Fleur Aline
- Université François Rabelais Tours, INRA, UMR 0483 Université-INRA d'Immunologie Parasitaire et Vaccinologie, Biothérapies anti-infectieuses, IFR agents transmissibles en Infectiologie; UFR des Sciences Pharmaceutiques, 37200 Tours, France
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20
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Perry JW, Taube S, Wobus CE. Murine norovirus-1 entry into permissive macrophages and dendritic cells is pH-independent. Virus Res 2009; 143:125-9. [PMID: 19463729 DOI: 10.1016/j.virusres.2009.03.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Revised: 02/26/2009] [Accepted: 03/02/2009] [Indexed: 10/21/2022]
Abstract
Murine norovirus (MNV) is a recently discovered mouse pathogen. Unlike the fastidious human noroviruses that cause the overwhelming majority of non-bacterial gastroenteritis worldwide, MNV readily infects cells in culture. Its replication in primary murine macrophages and dendritic cells and their derived cell lines allows the study of norovirus cell entry for the first time. In this study we determined the role of pH during MNV-1 infection since the low pH environment of endosomes often triggers uncoating of viruses. We demonstrated that MNV-1 viral titers by plaque assay and expression of the non-structural protein VPg by immunofluorescence were not affected by pH in cultured and primary macrophages and dendritic cells in the presence of two known endosome acidification inhibitors, bafilomycin A1 and chloroquine. These data indicate that MNV-1 enters permissive cells in a pH-independent manner.
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Affiliation(s)
- Jeffrey W Perry
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48109-5620, United States
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21
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Beauvillain C, Juste MO, Dion S, Pierre J, Dimier-Poisson I. Exosomes are an effective vaccine against congenital toxoplasmosis in mice. Vaccine 2009; 27:1750-7. [DOI: 10.1016/j.vaccine.2009.01.022] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2008] [Revised: 01/02/2009] [Accepted: 01/11/2009] [Indexed: 12/31/2022]
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22
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Cellular and molecular physiopathology of congenital toxoplasmosis: the dual role of IFN-gamma. Parasitology 2008; 134:1895-902. [PMID: 17958925 DOI: 10.1017/s0031182007000200] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Toxoplasma gondii is one of the few pathogens that can cross the placenta. Frequency and severity of transmission vary with gestational age. While the control of acquired toxoplasmosis is already well explored, the control of materno-foetal transmission of the parasite remains almost unknown. This is partly due to the lack of an animal model to study this process. This review summarises the studies which have been undertaken and shows that the mouse is a valuable model despite obvious differences to the human case. The paramount role of the cellular immune response has been shown by several experiments. However, IFN-gamma has a dual role in this process. While its beneficial effects in the control of toxoplasmosis are well known, it also seems to have transmission-enhancing effects and can also directly harm the developing foetus. The ultimate goal of these studies is to develop a vaccine which protects both mother and foetus. Therefore, it is useful to study the mechanisms of natural resistance against transmission during a secondary infection. In this setting, the process is more complicated, involving both cellular and also humoral components of the immune system. In summary, even if the whole process is far from being elucidated, important insights have been gained so far which will help us to undertake rational vaccine research.
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Beauvillain C, Ruiz S, Guiton R, Bout D, Dimier-Poisson I. A vaccine based on exosomes secreted by a dendritic cell line confers protection against T. gondii infection in syngeneic and allogeneic mice. Microbes Infect 2007; 9:1614-22. [PMID: 17905628 DOI: 10.1016/j.micinf.2007.07.002] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2006] [Revised: 06/29/2007] [Accepted: 07/07/2007] [Indexed: 01/05/2023]
Abstract
Our results show that exosomes secreted by SRDC pulsed in vitro with Toxoplasma gondii-derived antigens (Exo-TAg) induced protective responses against infection with the parasite in both syngeneic and allogeneic mice. After oral infection, syngeneic CBA/J mice exhibited significantly fewer cysts in their brains and allogeneic C57BL/6 mice survived. This protection was associated with strong humoral responses in vivo in serum from both CBA/J and C57BL/6 mice, and with high levels of anti-TAg IgA antibodies in intestinal secretions from CBA/J mice alone. Furthermore, strong cellular responses in vivo were observed in both mouse models. Cellular proliferation was associated with cytokines production by spleen and mesenteric lymph node cells. The results presented here show that exosomes are nucleic acid free vesicles that are able to induce immune responses correlated with protection against parasitic infections in both syngeneic and allogeneic mice. They could constitute an efficient tool for use in vaccination and antitumor strategies based on exosomes.
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Affiliation(s)
- Céline Beauvillain
- Université François-Rabelais, INRA, UMR 0483 Université-INRA d'Immunologie Parasitaire et Vaccinologie, IFR des Agents Transmissibles et Infectiologie, UFR des Sciences Pharmaceutiques, Tours, France.
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24
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Auray G, Lacroix-Lamandé S, Mancassola R, Dimier-Poisson I, Laurent F. Involvement of intestinal epithelial cells in dendritic cell recruitment during C. parvum infection. Microbes Infect 2007; 9:574-82. [PMID: 17395519 DOI: 10.1016/j.micinf.2007.01.026] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2006] [Revised: 01/25/2007] [Accepted: 01/25/2007] [Indexed: 11/20/2022]
Abstract
Dendritic cells (DCs) play a key role in activating and orientating immune responses. Little is currently known about DC recruitment during Cryptosporidium parvum infection. In the intestine, epithelial cells act as sensors, providing the first signals in response to infection by enteric pathogens. We analyzed the contribution of these cells to the recruitment of DCs during cryptosporidiosis. We found that intestinal epithelial cells produced a broad range of DC-attracting chemokines in vitro in response to C. parvum infection. The supernatant of the infected cells induced the migration of both bone marrow-derived DCs (BMDC) and the SRDC lymphoid dendritic cell line. Chemokine neutralization abolished DC migration in these assays. We next analyzed chemokine mRNA expression in the mucosa of C. parvum-infected neonatal mice and recruitment of the various subsets of DCs. Myeloid (CD11c+ CD11b+) and double-negative DCs (CD11c+ CD11b- CD8alpha-) were the main subsets recruited in the ileum during C. parvum infection, via a mechanism involving IFNgamma. DCs were also recruited and activated in the draining lymph nodes during C. parvum infection, as shown by the upregulation of expression of MHC II and of the costimulation molecules CD40 and CD86.
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Affiliation(s)
- Gaël Auray
- Laboratoire Contrôle et Immunologie des Maladies Entériques du Nouveau-né, UR1282 Infectiologie Animale et Santé Publique IASP, INRA de Tours, F-37380 Nouzilly, France
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25
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Aline F, Brand D, Bout D, Pierre J, Fouquenet D, Verrier B, Dimier-Poisson I. Generation of specific Th1 and CD8+ T-cell responses by immunization with mouse CD8+ dendritic cells loaded with HIV-1 viral lysate or envelope glycoproteins. Microbes Infect 2007; 9:536-43. [PMID: 17350307 DOI: 10.1016/j.micinf.2007.01.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2006] [Revised: 01/22/2007] [Accepted: 01/22/2007] [Indexed: 11/27/2022]
Abstract
Immunization with antigen-pulsed dendritic cells (DCs) can be used to elicit optimal immune responses. We developed the SRDC cell line, with a morphology, phenotype and activity similar to mouse splenic CD4(-)CD8alpha(+)CD205(+)CD11b(-) dendritic cells, which induce a polarized Th1 immune response. We evaluated the ability of SRDCs pulsed with HIV-1 viral lysate, oligomeric soluble gp140 or capsid p24 to induce specific antibody and T-cell responses in CBA/J mice. Immunization with all loaded SRDCs elicited antibody responses against the antigens tested. However, only HIV-1 viral lysate and gp140-pulsed SRDCs elicited specific CD4(+) and CD8(+) T-cell responses. These findings demonstrate the value of well characterized DC lines for optimizing the antigen-loading mixture, according to the DC population targeted. Our data suggest that splenic DCs pulsed with complex antigens, such as HIV-1 viral lysate or oligomeric soluble gp140, could be used as vaccines, eliciting strong primary Th1-polarized and humoral immune responses against HIV proteins in vivo.
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Affiliation(s)
- Fleur Aline
- Université François Rabelais, INRA, UMR 0483 Université-INRA d'Immunologie Parasitaire et Vaccinologie, IFR Agents transmissibles en Infectiologie, UFR des Sciences Pharmaceutiques, 31 avenue Monge, 37200 Tours, France
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