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Ryckman M, Gantois N, Dominguez RG, Desramaut J, Li LL, Even G, Audebert C, Devos DP, Chabé M, Certad G, Monchy S, Viscogliosi E. Molecular Identification and Subtype Analysis of Blastocystis sp. Isolates from Wild Mussels ( Mytilus edulis) in Northern France. Microorganisms 2024; 12:710. [PMID: 38674653 PMCID: PMC11051716 DOI: 10.3390/microorganisms12040710] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 03/26/2024] [Accepted: 03/29/2024] [Indexed: 04/28/2024] Open
Abstract
Blastocystis sp. is the most common single-celled eukaryote colonizing the human gastrointestinal tract worldwide. Because of the proven zoonotic potential of this protozoan, sustained research is therefore focused on identifying various reservoirs of transmission to humans, and in particular animal sources. Numerous groups of animals are considered to be such reservoirs due to their handling or consumption. However, some of them, including mollusks, remain underexplored. Therefore, a molecular epidemiological survey conducted in wild mussels was carried out in Northern France (Hauts-de-France region) to evaluate the frequency and subtypes (STs) distribution of Blastocystis sp. in these bivalve mollusks. For this purpose, 100 mussels (Mytilus edulis) were randomly collected in two sampling sites (Wimereux and Dannes) located in the vicinity of Boulogne-sur-Mer. The gills and gastrointestinal tract of each mussel were screened for the presence of Blastocystis sp. by real-time polymerase chain reaction (qPCR) assay followed by direct sequencing of positive PCR products and subtyping through phylogenetic analysis. In parallel, sequences of potential representative Blastocystis sp. isolates that were previously obtained from temporal surveys of seawater samples at marine stations offshore of Wimereux were integrated in the present analysis. By taking into account the qPCR results from all mussels, the overall prevalence of the parasite was shown to reach 62.0%. In total, more than 55% of the positive samples presented mixed infections. In the remaining mussel samples with a single sequence, various STs including ST3, ST7, ST14, ST23, ST26 and ST44 were reported with varying frequencies. Such distribution of STs coupled with the absence of a predominant ST specific to these bivalves strongly suggested that mussels might not be natural hosts of Blastocystis sp. and might rather be carriers of parasite isolates from both human and animal (bovid and birds) waste. These data from mussels together with the molecular identification of isolates from marine stations were subsequently discussed along with the local geographical context in order to clarify the circulation of this protozoan in this area. The identification of human and animal STs of Blastocystis sp. in mussels emphasized the active circulation of this protozoan in mollusks and suggested a significant environmental contamination of fecal origin. This study has provided new insights into the host/carrier range and transmission of Blastocystis sp. and emphasized its potential as an effective sentinel species for water quality and environmental contamination.
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Affiliation(s)
- Manon Ryckman
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019–UMR 9017–CIIL–Centre d’Infection et d’Immunité de Lille, University of Lille, F-59000 Lille, France; (M.R.); (N.G.); (J.D.); (D.P.D.); (M.C.); (G.C.)
- Université du Littoral Côte d’Opale, CNRS, University Lille, UMR 8187, LOG, Laboratoire d’Océanologie et de Géosciences, F-62930 Wimereux, France; (L.-L.L.); (S.M.)
| | - Nausicaa Gantois
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019–UMR 9017–CIIL–Centre d’Infection et d’Immunité de Lille, University of Lille, F-59000 Lille, France; (M.R.); (N.G.); (J.D.); (D.P.D.); (M.C.); (G.C.)
| | - Ruben Garcia Dominguez
- Centro Andaluz de Biología del Desarrollo, CSIC, Universidad Pablo de Olavide, 41013 Sevilla, Spain;
| | - Jeremy Desramaut
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019–UMR 9017–CIIL–Centre d’Infection et d’Immunité de Lille, University of Lille, F-59000 Lille, France; (M.R.); (N.G.); (J.D.); (D.P.D.); (M.C.); (G.C.)
| | - Luen-Luen Li
- Université du Littoral Côte d’Opale, CNRS, University Lille, UMR 8187, LOG, Laboratoire d’Océanologie et de Géosciences, F-62930 Wimereux, France; (L.-L.L.); (S.M.)
| | - Gaël Even
- GD Biotech—Gènes Diffusion, F-59000 Lille, France; (G.E.); (C.A.)
- PEGASE-Biosciences (Plateforme d’Expertises Génomiques Appliquées aux Sciences Expérimentales), Institut Pasteur de Lille, F-59000 Lille, France
| | - Christophe Audebert
- GD Biotech—Gènes Diffusion, F-59000 Lille, France; (G.E.); (C.A.)
- PEGASE-Biosciences (Plateforme d’Expertises Génomiques Appliquées aux Sciences Expérimentales), Institut Pasteur de Lille, F-59000 Lille, France
| | - Damien Paul Devos
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019–UMR 9017–CIIL–Centre d’Infection et d’Immunité de Lille, University of Lille, F-59000 Lille, France; (M.R.); (N.G.); (J.D.); (D.P.D.); (M.C.); (G.C.)
- Centro Andaluz de Biología del Desarrollo, CSIC, Universidad Pablo de Olavide, 41013 Sevilla, Spain;
| | - Magali Chabé
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019–UMR 9017–CIIL–Centre d’Infection et d’Immunité de Lille, University of Lille, F-59000 Lille, France; (M.R.); (N.G.); (J.D.); (D.P.D.); (M.C.); (G.C.)
| | - Gabriela Certad
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019–UMR 9017–CIIL–Centre d’Infection et d’Immunité de Lille, University of Lille, F-59000 Lille, France; (M.R.); (N.G.); (J.D.); (D.P.D.); (M.C.); (G.C.)
- Délégation à la Recherche Clinique et à l’Innovation, Groupement des Hôpitaux de l’Institut Catholique de Lille, F-59000 Lille, France
| | - Sébastien Monchy
- Université du Littoral Côte d’Opale, CNRS, University Lille, UMR 8187, LOG, Laboratoire d’Océanologie et de Géosciences, F-62930 Wimereux, France; (L.-L.L.); (S.M.)
| | - Eric Viscogliosi
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019–UMR 9017–CIIL–Centre d’Infection et d’Immunité de Lille, University of Lille, F-59000 Lille, France; (M.R.); (N.G.); (J.D.); (D.P.D.); (M.C.); (G.C.)
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Certad G, Gantois N, Merlin S, Martel S, Even G, Viscogliosi E, Audebert C, Chabé M. Frequency and Molecular Identification of Cryptosporidium in Adult Prim'Holstein Dairy Cattle Farms in the North of France. Microorganisms 2024; 12:335. [PMID: 38399739 PMCID: PMC10892647 DOI: 10.3390/microorganisms12020335] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 01/25/2024] [Accepted: 02/01/2024] [Indexed: 02/25/2024] Open
Abstract
Cryptosporidium apicomplexan protozoa are ubiquitous intracellular agents affecting humans and animals. In particular, bovine cryptosporidiosis is recognized as endemic worldwide. However, epidemiological investigations remain limited in France regarding the burden of these parasites in cattle. To improve our understanding of the epidemiology of cryptosporidiosis, the main aim of this study was to determine the frequency and the genetic diversity of Cryptosporidium in adult Prim'Holstein dairy cattle farms in the north of France. Fecal specimens were collected from 1454 non-diarrheic and non-pregnant animals (nulli-, primi-, or multiparous) throughout 20 farms in an area of 110 km around Lille. For Cryptosporidium species identification, nested PCR followed by sequence and phylogenetic analyses were used. The overall frequency of Cryptosporidium spp. in-fection was 30.00% (C.I. 95%: 12.83-54.33) in farms and 0.89% (C.I. 95%: 0.498-1.57) at the individual level. In primi- or multiparous cows, only C. andersoni was found. C. ryanae, C. bovis/xiaoi and C. andersoni were detected in heifers. The phylogenetic tree confirmed that analyzed sequences were grouped with known reference sequences reported in dairy cattle. Further studies on the cumulative prevalence, risks factors and pathogenicity are needed to give a more accurate assessment of the impact of Cryptosporidium infection in dairy cattle in France.
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Affiliation(s)
- Gabriela Certad
- Centre National de la Rrecherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (Inserm), Centre Hospitalier Universitaire de Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d’Infection et d’Immunité de Lille, University of Lille, F-59000 Lille, France; (N.G.); (E.V.); (M.C.)
- Délégation à la Recherche Clinique et à l’Innovation, Groupement des Hôpitaux de l’Institut Catholique de Lille, F-59000 Lille, France
| | - Nausicaa Gantois
- Centre National de la Rrecherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (Inserm), Centre Hospitalier Universitaire de Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d’Infection et d’Immunité de Lille, University of Lille, F-59000 Lille, France; (N.G.); (E.V.); (M.C.)
| | - Sophie Merlin
- GD Biotech-Gènes Diffusion, F-59000 Lille, France; (S.M.); (S.M.); (G.E.); (C.A.)
- PEGASE-Biosciences (Plateforme d’Expertises Génomiques Appliquées aux Sciences Expérimentales), Institut Pasteur de Lille, F-59000 Lille, France
| | - Sophie Martel
- GD Biotech-Gènes Diffusion, F-59000 Lille, France; (S.M.); (S.M.); (G.E.); (C.A.)
- PEGASE-Biosciences (Plateforme d’Expertises Génomiques Appliquées aux Sciences Expérimentales), Institut Pasteur de Lille, F-59000 Lille, France
| | - Gaël Even
- GD Biotech-Gènes Diffusion, F-59000 Lille, France; (S.M.); (S.M.); (G.E.); (C.A.)
- PEGASE-Biosciences (Plateforme d’Expertises Génomiques Appliquées aux Sciences Expérimentales), Institut Pasteur de Lille, F-59000 Lille, France
| | - Eric Viscogliosi
- Centre National de la Rrecherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (Inserm), Centre Hospitalier Universitaire de Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d’Infection et d’Immunité de Lille, University of Lille, F-59000 Lille, France; (N.G.); (E.V.); (M.C.)
| | - Christophe Audebert
- GD Biotech-Gènes Diffusion, F-59000 Lille, France; (S.M.); (S.M.); (G.E.); (C.A.)
- PEGASE-Biosciences (Plateforme d’Expertises Génomiques Appliquées aux Sciences Expérimentales), Institut Pasteur de Lille, F-59000 Lille, France
| | - Magali Chabé
- Centre National de la Rrecherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (Inserm), Centre Hospitalier Universitaire de Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d’Infection et d’Immunité de Lille, University of Lille, F-59000 Lille, France; (N.G.); (E.V.); (M.C.)
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Audebert C, Even G, Vandenabeele N, Mouray A, Chabé M. [A novel strategy taking gut microbiota fingerprints into account for robust and reproducible animal experiments]. Med Sci (Paris) 2023; 39:934-936. [PMID: 38108723 DOI: 10.1051/medsci/2023174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023] Open
Affiliation(s)
- Christophe Audebert
- GD Biotech-Gènes Diffusion, Lille, France - PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | - Gaël Even
- GD Biotech-Gènes Diffusion, Lille, France - PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | - Nicolas Vandenabeele
- Plateforme d'expérimentations et de hautes technologies animales, Institut Pasteur de Lille, Lille, France - Institut Pasteur de Lille, US 41-UAR 2014-PLBS, Université Lille, CNRS, Inserm, CHU Lille, Lille, France
| | - Anthony Mouray
- Plateforme d'expérimentations et de hautes technologies animales, Institut Pasteur de Lille, Lille, France - Institut Pasteur de Lille, US 41-UAR 2014-PLBS, Université Lille, CNRS, Inserm, CHU Lille, Lille, France
| | - Magali Chabé
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017 - Centre d'infection et d'immunité de Lille (CIIL), Lille, France
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Even G, Mouray A, Vandenabeele N, Martel S, Merlin S, Lebrun-Ruer S, Chabé M, Audebert C. Bact-to-Batch: A Microbiota-Based Tool to Determine Optimal Animal Allocation in Experimental Designs. Int J Mol Sci 2023; 24:ijms24097912. [PMID: 37175619 PMCID: PMC10178137 DOI: 10.3390/ijms24097912] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/17/2023] [Accepted: 04/18/2023] [Indexed: 05/15/2023] Open
Abstract
The basis of any animal experimentation begins with the housing of animals that should take into account the need for splitting animals into similar groups. Even if it is generally recommended to use the minimum number of animals necessary to obtain reliable and statistically significant results (3Rs rule), the allocation of animals is currently mostly based on randomness. Since variability in gut microbiota is an important confounding factor in animal experiments, the main objective of this study was to develop a new approach based on 16S rRNA gene sequencing analysis of the gut microbiota of animals participating in an experiment, in order to correctly assign the animals across batches. For this purpose, a pilot study was performed on 20 mouse faecal samples with the aim of establishing two groups of 10 mice as similar as possible in terms of their faecal microbiota fingerprinting assuming that this approach limits future analytical bias and ensures reproducibility. The suggested approach was challenged with previously published data from a third-party study. This new method allows to embrace the unavoidable microbiota variability between animals in order to limit artefacts and to provide an additional assurance for the reproducibility of animal experiments.
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Affiliation(s)
- Gaël Even
- GD Biotech-Gènes Diffusion, F-59000 Lille, France
- PEGASE-Biosciences, Institut Pasteur de Lille, F-59019 Lille, France
| | - Anthony Mouray
- Plateforme d'Expérimentations et de Hautes Technologies Animales, Institut Pasteur de Lille, F-59019 Lille, France
- Institut Pasteur de Lille, US 41-UAR 2014-PLBS, Université Lille, CNRS, Inserm, CHU Lille, F-59000 Lille, France
| | - Nicolas Vandenabeele
- Plateforme d'Expérimentations et de Hautes Technologies Animales, Institut Pasteur de Lille, F-59019 Lille, France
- Institut Pasteur de Lille, US 41-UAR 2014-PLBS, Université Lille, CNRS, Inserm, CHU Lille, F-59000 Lille, France
| | - Sophie Martel
- GD Biotech-Gènes Diffusion, F-59000 Lille, France
- PEGASE-Biosciences, Institut Pasteur de Lille, F-59019 Lille, France
| | - Sophie Merlin
- GD Biotech-Gènes Diffusion, F-59000 Lille, France
- PEGASE-Biosciences, Institut Pasteur de Lille, F-59019 Lille, France
| | - Ségolène Lebrun-Ruer
- GD Biotech-Gènes Diffusion, F-59000 Lille, France
- PEGASE-Biosciences, Institut Pasteur de Lille, F-59019 Lille, France
| | - Magali Chabé
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d'Infection et d'Immunité de Lille, Université de Lille, F-59000 Lille, France
| | - Christophe Audebert
- GD Biotech-Gènes Diffusion, F-59000 Lille, France
- PEGASE-Biosciences, Institut Pasteur de Lille, F-59019 Lille, France
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Van Maele C, Caboche S, Blanchot T, Brisebarre A, Audebert C, Muggeo A, Guillard T. Identification des gènes essentiels in vitro de Pseudomonas aeruginosa OprD mutant résistant aux carbapénèmes. Rev Mal Respir 2023. [DOI: 10.1016/j.rmr.2022.11.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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Van Maele C, Caboche S, Blanchot T, Brisebarre A, Audebert C, Muggeo A, Guillard T. Identification des gènes essentiels in vitro de Pseudomonas aeruginosa OprD mutant résistant aux carbapénèmes. Rev Mal Respir 2022. [DOI: 10.1016/j.rmr.2022.02.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Even G, Lokmer A, Rodrigues J, Audebert C, Viscogliosi E, Ségurel L, Chabé M. Changes in the Human Gut Microbiota Associated With Colonization by Blastocystis sp. and Entamoeba spp. in Non-Industrialized Populations. Front Cell Infect Microbiol 2021; 11:533528. [PMID: 33816323 PMCID: PMC8013780 DOI: 10.3389/fcimb.2021.533528] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 01/29/2021] [Indexed: 01/04/2023] Open
Abstract
Human gut microbial communities are mainly composed of bacteria, but also include fungi, viruses, archaea, and protozoa, whose role in the gut ecosystem has only recently begun to be recognized. For example, humans colonized by Blastocystis (a gut protozoan with controversial pathogenicity) host a more diverse bacterial microbiota than individuals not carrying it, suggesting that its presence may be beneficial for the host. In parallel, the presence of non-pathogenic Entamoeba spp. has been associated with an increased diversity and compositional shifts in the bacterial microbiota of healthy rural individuals in Cameroon. However, Entamoeba and Blastocystis, the two most prevalent human gut protozoa, have never been studied in the same individuals, preventing the study of their interaction. As Blastocystis is one of the few gut protozoa commonly found in industrialized populations, which are otherwise mostly devoid of gut eukaryotes, we need to focus on rural “traditional” populations, who harbor a higher diversity of gut eukaryotes (whether pathogenic or commensal) in order to study protozoa interactions in the gut ecosystem. To this end, we profiled the gut bacterial microbiota of 134 healthy Cameroonian adults using 16S rRNA gene amplicon sequencing data. Entamoeba and Blastocystis presence and co-occurrence pattern in the same individuals were determined using metagenomic shotgun data. We found that, when taking into account both protozoa jointly, Blastocystis was associated with both a higher richness and a higher evenness of the gut bacterial microbiota, while Entamoeba was associated only with a higher richness. We demonstrated a cumulative influence of these protozoa on bacterial microbiome diversity. Furthermore, while the abundance of several common taxa (for example, Ruminococcaceae, Coprococcus and Butyrivibrio) varied according to Blastocystis colonization, only a single Bacteroides amplicon sequence variant was found to be differentially abundant between Entamoeba-negative and Entamoeba-positive samples. Given the specific signature of each protozoan on the gut microbiota and the seemingly stronger association for Blastocystis, our results suggest that Blastocystis and Entamoeba interact with gut bacteria each in its own way, but experimental studies are needed to explore the precise mechanisms of these interactions.
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Affiliation(s)
- Gaël Even
- Gènes Diffusion, Douai, France.,PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | - Ana Lokmer
- UMR7206 Eco-Anthropologie, CNRS-MNHN-Université de Paris, Paris, France
| | - Jules Rodrigues
- UMR7206 Eco-Anthropologie, CNRS-MNHN-Université de Paris, Paris, France
| | - Christophe Audebert
- Gènes Diffusion, Douai, France.,PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | - Eric Viscogliosi
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d'Infection et d'Immunité de Lille, Lille, France
| | - Laure Ségurel
- UMR7206 Eco-Anthropologie, CNRS-MNHN-Université de Paris, Paris, France.,Laboratoire de Biométrie et Biologie Evolutive UMR5558, CNRS - Université Lyon 1, Université de Lyon, Villeurbanne, France
| | - Magali Chabé
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d'Infection et d'Immunité de Lille, Lille, France
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Østergaard AS, Even G, Audebert C. Effects of cold shock and warming rate on boar sperm. Theriogenology 2019. [DOI: 10.1016/j.theriogenology.2019.05.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bello-Gil D, Audebert C, Olivera-Ardid S, Pérez-Cruz M, Even G, Khasbiullina N, Gantois N, Shilova N, Merlin S, Costa C, Bovin N, Mañez R. The Formation of Glycan-Specific Natural Antibodies Repertoire in GalT-KO Mice Is Determined by Gut Microbiota. Front Immunol 2019; 10:342. [PMID: 30891034 PMCID: PMC6411795 DOI: 10.3389/fimmu.2019.00342] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 02/11/2019] [Indexed: 12/19/2022] Open
Abstract
Gut commensal bacteria are known to have a significant role in regulating the innate and adaptive immune homeostasis. Alterations in the intestinal microbial composition have been associated with several disease states, including autoimmune and inflammatory conditions. However, it is not entirely clear how commensal gut microbiota modulate and contribute to the systemic immunity, and whether circulating elements of the host immune system could regulate the microbiome. Thus, we have studied the diversity and abundance of specific taxons in the gut microbiota of inbred GalT-KO mice during 7 months of animal life by metagenetic high-throughput sequencing (16S rRNA gene, variable regions V3-V5). The repertoire of glycan-specific natural antibodies, obtained by printed glycan array technology, was then associated with the microbial diversity for each animal by metagenome-wide association studies (MWAS). Our data show that the orders clostridiales (most abundant), bacteriodales, lactobacillales, and deferribacterales may be associated with the development of the final repertoire of natural anti-glycan antibodies in GalT-KO mice. The main changes in microbiota diversity (month-2 and month-3) were related to important changes in levels and repertoire of natural anti-glycan antibodies in these mice. Additionally, significant positive and negative associations were found between the gut microbiota and the pattern of specific anti-glycan antibodies. Regarding individual features, the gut microbiota and the corresponding repertoire of natural anti-glycan antibodies showed differences among the examined animals. We also found redundancy in different taxa associated with the development of specific anti-glycan antibodies. Differences in microbial diversity did not, therefore, necessarily influence the overall functional output of the gut microbiome of GalT-KO mice. In summary, the repertoire of natural anti-carbohydrate antibodies may be partially determined by the continuous antigenic stimulation produced by the gut bacterial population of each GalT-KO mouse. Small differences in gut microbiota diversity could determine different repertoire and levels of natural anti-glycan antibodies and consequently might induce different immune responses to pathogens or other potential threats.
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Affiliation(s)
- Daniel Bello-Gil
- Infectious Pathology and Transplantation Division, Institut d'Investigació Biomèdica de Bellvitge, Barcelona, Spain
| | - Christophe Audebert
- Genes Diffusion, Douai, France.,PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | - Sara Olivera-Ardid
- Infectious Pathology and Transplantation Division, Institut d'Investigació Biomèdica de Bellvitge, Barcelona, Spain
| | - Magdiel Pérez-Cruz
- CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019-UMR 8204-CIIL-Centre d'Infection et d'Immunité de Lille, Université de Lille, Lille, France
| | - Gaël Even
- Genes Diffusion, Douai, France.,PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | | | - Nausicaa Gantois
- Lille University, CNRS, Inserm, Lille University Hospital, Pasteur Institute of Lille, U1019 -UMR 8204 -CIIL-Centre d'Infection et d'Immunité de Lille, Lille, France
| | - Nadezhda Shilova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Sophie Merlin
- Genes Diffusion, Douai, France.,PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | - Cristina Costa
- Infectious Pathology and Transplantation Division, Institut d'Investigació Biomèdica de Bellvitge, Barcelona, Spain
| | - Nicolai Bovin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Rafael Mañez
- Infectious Pathology and Transplantation Division, Institut d'Investigació Biomèdica de Bellvitge, Barcelona, Spain.,Intensive Care Department, Bellvitge University Hospital, Barcelona, Spain
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Audebert C, Hot D, Caboche S. [Prospects for applications in human health of nanopore-based sequencing]. Med Sci (Paris) 2018; 34:319-325. [PMID: 29658474 DOI: 10.1051/medsci/20183404012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
High throughput sequencing has opened up new clinical opportunities moving towards a medicine of precision. Oncology, infectious diseases or human genomics, many applications have been developed in recent years. The introduction of a third generation of nanopore-based sequencing technology, addressing some of the weaknesses of the previous generation, heralds a new revolution. Portability, real time, long reads and marginal investment costs, these promising new technologies point to a new shift of paradigm. What are the perspectives opened up by nanopores for clinical applications?
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Affiliation(s)
- Christophe Audebert
- Gènes Diffusion, 3595, route de Tournai, 59501 Douai, France - Pegase-Biosciences, Institut Pasteur de Lille, 1, rue du professeur Calmette, 59019 Lille, France
| | - David Hot
- Univ Lille, CNRS, Inserm, CHU de Lille, Institut Pasteur de Lille, U1019-UMR 8204-CIIL-Centre d'Infection et d'Immunité de Lille, 1, rue du professeur Calmette, F-59000 Lille, France - Pegase-Biosciences, Institut Pasteur de Lille, 1, rue du professeur Calmette, 59019 Lille, France
| | - Ségolène Caboche
- Univ Lille, CNRS, Inserm, CHU de Lille, Institut Pasteur de Lille, U1019-UMR 8204-CIIL-Centre d'Infection et d'Immunité de Lille, 1, rue du professeur Calmette, F-59000 Lille, France - Pegase-Biosciences, Institut Pasteur de Lille, 1, rue du professeur Calmette, 59019 Lille, France
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11
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Caboche S, Even G, Loywick A, Audebert C, Hot D. MICRA: an automatic pipeline for fast characterization of microbial genomes from high-throughput sequencing data. Genome Biol 2017; 18:233. [PMID: 29258574 PMCID: PMC5738152 DOI: 10.1186/s13059-017-1367-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 11/30/2017] [Indexed: 12/15/2022] Open
Abstract
The increase in available sequence data has advanced the field of microbiology; however, making sense of these data without bioinformatics skills is still problematic. We describe MICRA, an automatic pipeline, available as a web interface, for microbial identification and characterization through reads analysis. MICRA uses iterative mapping against reference genomes to identify genes and variations. Additional modules allow prediction of antibiotic susceptibility and resistance and comparing the results of several samples. MICRA is fast, producing few false-positive annotations and variant calls compared to current methods, making it a tool of great interest for fully exploiting sequencing data.
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Affiliation(s)
- Ségolène Caboche
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 8204-CIIL-Centre d'Infection et d'Immunité de Lille, F-59000, Lille, France. .,PEGASE-Biosciences, Institut Pasteur de Lille, 1 Rue du Professeur Calmette, 59019, Lille, France.
| | - Gaël Even
- Genes Diffusion, 3595, Route de Tournai, 59501, Douai, France.,PEGASE-Biosciences, Institut Pasteur de Lille, 1 Rue du Professeur Calmette, 59019, Lille, France
| | - Alexandre Loywick
- Genes Diffusion, 3595, Route de Tournai, 59501, Douai, France.,PEGASE-Biosciences, Institut Pasteur de Lille, 1 Rue du Professeur Calmette, 59019, Lille, France
| | - Christophe Audebert
- Genes Diffusion, 3595, Route de Tournai, 59501, Douai, France.,PEGASE-Biosciences, Institut Pasteur de Lille, 1 Rue du Professeur Calmette, 59019, Lille, France
| | - David Hot
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 8204-CIIL-Centre d'Infection et d'Immunité de Lille, F-59000, Lille, France.,PEGASE-Biosciences, Institut Pasteur de Lille, 1 Rue du Professeur Calmette, 59019, Lille, France
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12
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Siegwald L, Audebert C, Even G, Viscogliosi E, Caboche S, Chabé M. Targeted metagenomic sequencing data of human gut microbiota associated with Blastocystis colonization. Sci Data 2017; 4:170081. [PMID: 28654083 PMCID: PMC5486356 DOI: 10.1038/sdata.2017.81] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 02/24/2017] [Accepted: 05/19/2017] [Indexed: 01/27/2023] Open
Abstract
In the past decade, metagenomics studies have become widespread due to the arrival of second-generation sequencing platforms characterized by low costs, high throughput and short read lengths. Today, although benchtop sequencers are considered to be accurate platforms to deliver data for targeted metagenomics studies, the limiting factor has become the analysis of these data. In a previous paper, we performed an Ion Torrent PGM 16S rDNA gene sequencing of faecal DNAs from 48 Blastocystis-colonized patients and 48 Blastocystis-negative subjects, in order to decipher the impact of this widespread protist on gut microbiota composition and diversity. We report here on the Ion Torrent targeted metagenomic sequencing and analysis of these 96 human faecal samples, and the complete datasets from raw to analysed data. We also provide the key steps of the bioinformatic analyses, from library preparation to data filtering and OTUs tables generation. This data represents a valuable resource for the scientific community, enabling re-processing of these targeted metagenomic datasets through various pipelines and a comparative evaluation of microbiota analysis methods.
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Affiliation(s)
- Léa Siegwald
- GENES DIFFUSION, Douai 59501, France.,PEGASE-Biosciences, Institut Pasteur de Lille, Lille 59019, France.,CRIStAL (UMR CNRS 9189 Université de Lille, Centre de Recherche en Informatique, Signal et Automatique de Lille) &Inria, Villeneuve d'Ascq 59655, France.,Univ. Lille, CNRS, Inserm, CHU de Lille, Institut Pasteur de Lille, U1019-UMR 8204-CIIL-Centre d'Infection et d'Immunité de Lille, Lille 59019, France
| | - Christophe Audebert
- GENES DIFFUSION, Douai 59501, France.,PEGASE-Biosciences, Institut Pasteur de Lille, Lille 59019, France
| | - Gaël Even
- GENES DIFFUSION, Douai 59501, France.,PEGASE-Biosciences, Institut Pasteur de Lille, Lille 59019, France
| | - Eric Viscogliosi
- Univ. Lille, CNRS, Inserm, CHU de Lille, Institut Pasteur de Lille, U1019-UMR 8204-CIIL-Centre d'Infection et d'Immunité de Lille, Lille 59019, France
| | - Ségolène Caboche
- PEGASE-Biosciences, Institut Pasteur de Lille, Lille 59019, France.,Univ. Lille, CNRS, Inserm, CHU de Lille, Institut Pasteur de Lille, U1019-UMR 8204-CIIL-Centre d'Infection et d'Immunité de Lille, Lille 59019, France
| | - Magali Chabé
- Univ. Lille, CNRS, Inserm, CHU de Lille, Institut Pasteur de Lille, U1019-UMR 8204-CIIL-Centre d'Infection et d'Immunité de Lille, Lille 59019, France
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13
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Marsot A, Audebert C, Attolini L, Lacarelle B, Micallef J, Blin O. Population pharmacokinetics model of THC used by pulmonary route in occasional cannabis smokers. J Pharmacol Toxicol Methods 2017; 85:49-54. [DOI: 10.1016/j.vascn.2017.02.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 02/01/2017] [Accepted: 02/02/2017] [Indexed: 12/28/2022]
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14
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Siegwald L, Touzet H, Lemoine Y, Hot D, Audebert C, Caboche S. Assessment of Common and Emerging Bioinformatics Pipelines for Targeted Metagenomics. PLoS One 2017; 12:e0169563. [PMID: 28052134 PMCID: PMC5215245 DOI: 10.1371/journal.pone.0169563] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 12/19/2016] [Indexed: 11/19/2022] Open
Abstract
Targeted metagenomics, also known as metagenetics, is a high-throughput sequencing application focusing on a nucleotide target in a microbiome to describe its taxonomic content. A wide range of bioinformatics pipelines are available to analyze sequencing outputs, and the choice of an appropriate tool is crucial and not trivial. No standard evaluation method exists for estimating the accuracy of a pipeline for targeted metagenomics analyses. This article proposes an evaluation protocol containing real and simulated targeted metagenomics datasets, and adequate metrics allowing us to study the impact of different variables on the biological interpretation of results. This protocol was used to compare six different bioinformatics pipelines in the basic user context: Three common ones (mothur, QIIME and BMP) based on a clustering-first approach and three emerging ones (Kraken, CLARK and One Codex) using an assignment-first approach. This study surprisingly reveals that the effect of sequencing errors has a bigger impact on the results that choosing different amplified regions. Moreover, increasing sequencing throughput increases richness overestimation, even more so for microbiota of high complexity. Finally, the choice of the reference database has a bigger impact on richness estimation for clustering-first pipelines, and on correct taxa identification for assignment-first pipelines. Using emerging assignment-first pipelines is a valid approach for targeted metagenomics analyses, with a quality of results comparable to popular clustering-first pipelines, even with an error-prone sequencing technology like Ion Torrent. However, those pipelines are highly sensitive to the quality of databases and their annotations, which makes clustering-first pipelines still the only reliable approach for studying microbiomes that are not well described.
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Affiliation(s)
- Léa Siegwald
- Gènes Diffusion, Douai, France
- CRIStAL (UMR CNRS 9189 University of Lille, Centre de Recherche en Informatique, Signal et Automatique de Lille) and Inria, Villeneuve d'Ascq, France
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Lille, France
- PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | - Hélène Touzet
- CRIStAL (UMR CNRS 9189 University of Lille, Centre de Recherche en Informatique, Signal et Automatique de Lille) and Inria, Villeneuve d'Ascq, France
| | - Yves Lemoine
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Lille, France
- PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | - David Hot
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Lille, France
- PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | - Christophe Audebert
- Gènes Diffusion, Douai, France
- PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | - Ségolène Caboche
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Lille, France
- PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
- * E-mail:
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15
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Nguyen LDN, Deschaght P, Merlin S, Loywick A, Audebert C, Van Daele S, Viscogliosi E, Vaneechoutte M, Delhaes L. Effects of Propidium Monoazide (PMA) Treatment on Mycobiome and Bacteriome Analysis of Cystic Fibrosis Airways during Exacerbation. PLoS One 2016; 11:e0168860. [PMID: 28030619 PMCID: PMC5193350 DOI: 10.1371/journal.pone.0168860] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 12/07/2016] [Indexed: 02/06/2023] Open
Abstract
Introduction and Purpose Propidium monoazide (PMA)-pretreatment has increasingly been applied to remove the bias from dead or damaged cell artefacts, which could impact the microbiota analysis by high-throughput sequencing. Our study aimed to determine whether a PMA-pretreatment coupled with high-throughput sequencing analysis provides a different picture of the airway mycobiome and bacteriome. Results and Discussion We compared deep-sequencing data of mycobiota and microbiota of 15 sputum samples from 5 cystic fibrosis (CF) patients with and without prior PMA-treatment of the DNA-extracts. PMA-pretreatment had no significant effect on the entire and abundant bacterial community (genera expressed as operational taxonomic units (OTUs) with a relative abundance greater than or equal to 1%), but caused a significant difference in the intermediate community (less than 1%) when analyzing the alpha biodiversity Simpson index (p = 0.03). Regarding PMA impact on the airway mycobiota evaluated for the first time here; no significant differences in alpha diversity indexes between PMA-treated and untreated samples were observed. Regarding beta diversity analysis, the intermediate communities also differed more dramatically than the total and abundant ones when studying both mycobiome and bacteriome. Our results showed that only the intermediate (or low abundance) population diversity is impacted by PMA-treatment, and therefore that abundant taxa are mostly viable during acute exacerbation in CF. Given such a cumbersome protocol (PMA-pretreatment coupled with high-throughput sequencing), we discuss its potential interest within the follow-up of CF patients. Further studies using PMA-pretreatment are warranted to improve our “omic” knowledge of the CF airways.
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Affiliation(s)
- Linh Do Ngoc Nguyen
- Institut Pasteur de Lille, Center for Infection and Immunity of Lille (CIIL), INSERM U1019, CNRS UMR 8204, University of Lille, Lille, France
| | - Pieter Deschaght
- Laboratory for Bacteriology Research, Faculty of Medicine & Health Sciences, Ghent University, Ghent, Belgium
| | - Sophie Merlin
- GenesDiffusion, Douai, France
- PEGASE, Biosciences, Institut Pasteur de Lille, Lille, France
| | - Alexandre Loywick
- GenesDiffusion, Douai, France
- PEGASE, Biosciences, Institut Pasteur de Lille, Lille, France
| | - Christophe Audebert
- GenesDiffusion, Douai, France
- PEGASE, Biosciences, Institut Pasteur de Lille, Lille, France
| | - Sabine Van Daele
- Department of Pediatrics and Genetics, Faculty of Medicine & Health Sciences, Ghent University, Ghent, Belgium
| | - Eric Viscogliosi
- Institut Pasteur de Lille, Center for Infection and Immunity of Lille (CIIL), INSERM U1019, CNRS UMR 8204, University of Lille, Lille, France
| | - Mario Vaneechoutte
- Laboratory for Bacteriology Research, Faculty of Medicine & Health Sciences, Ghent University, Ghent, Belgium
| | - Laurence Delhaes
- Institut Pasteur de Lille, Center for Infection and Immunity of Lille (CIIL), INSERM U1019, CNRS UMR 8204, University of Lille, Lille, France
- Parasitology-Medical Mycology Department, Regional Hospital Center, Faculty of Medicine, Lille, France
- * E-mail:
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Gershman A, Chiang K, Do M, Abbink E, Harbers V, Audebert C, Campana-Salort E, Monforte M, Iyadurai S, Carey L, Heskamp L, Kan H, Heerschap A, Kissel J, Ricci E, Attarian S, Blackburn K, Mendlein J, Ashlock M. A randomized, double-blinded, placebo-controlled, multiple ascending dose study to evaluate the safety, tolerability, pharmacokinetics, immunogenicity, and biological activity of ATYR1940 in adult patients with facioscapulohumeral muscular dystrophy (FSHD). Neuromuscul Disord 2016. [DOI: 10.1016/j.nmd.2016.06.293] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Audebert C, Even G, Cian A, Loywick A, Merlin S, Viscogliosi E, Chabé M. Colonization with the enteric protozoa Blastocystis is associated with increased diversity of human gut bacterial microbiota. Sci Rep 2016; 6:25255. [PMID: 27147260 PMCID: PMC4857090 DOI: 10.1038/srep25255] [Citation(s) in RCA: 174] [Impact Index Per Article: 21.8] [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: 02/24/2016] [Accepted: 04/13/2016] [Indexed: 12/16/2022] Open
Abstract
Alterations in the composition of commensal bacterial populations, a phenomenon known as dysbiosis, are linked to multiple gastrointestinal disorders, such as inflammatory bowel disease and irritable bowel syndrome, or to infections by diverse enteric pathogens. Blastocystis is one of the most common single-celled eukaryotes detected in human faecal samples. However, the clinical significance of this widespread colonization remains unclear, and its pathogenic potential is controversial. To address the issue of Blastocystis pathogenicity, we investigated the impact of colonization by this protist on the composition of the human gut microbiota. For that purpose, we conducted a cross-sectional study including 48 Blastocystis-colonized patients and 48 Blastocystis-free subjects and performed an Ion Torrent 16S rDNA gene sequencing to decipher the Blastocystis-associated gut microbiota. Here, we report a higher bacterial diversity in faecal microbiota of Blastocystis colonized patients, a higher abundance of Clostridia as well as a lower abundance of Enterobacteriaceae. Our results contribute to suggesting that Blastocystis colonization is usually associated with a healthy gut microbiota, rather than with gut dysbiosis generally observed in metabolic or infectious inflammatory diseases of the lower gastrointestinal tract.
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Affiliation(s)
- Christophe Audebert
- GENES DIFFUSION, Douai, France.,PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | - Gaël Even
- GENES DIFFUSION, Douai, France.,PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | - Amandine Cian
- Univ. Lille, CNRS, Inserm, CHU de Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, Lille, France
| | | | - Alexandre Loywick
- GENES DIFFUSION, Douai, France.,PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | - Sophie Merlin
- GENES DIFFUSION, Douai, France.,PEGASE-Biosciences, Institut Pasteur de Lille, Lille, France
| | - Eric Viscogliosi
- Univ. Lille, CNRS, Inserm, CHU de Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, Lille, France
| | - Magali Chabé
- Univ. Lille, CNRS, Inserm, CHU de Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, Lille, France
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Khalife S, Chabé M, Gantois N, Audebert C, Pottier M, Hlais S, Pinçon C, Chassat T, Pierrot C, Khalife J, Aliouat-Denis CM, Aliouat EM. Relationship Between Pneumocystis carinii Burden and the Degree of Host Immunosuppression in an Airborne Transmission Experimental Model. J Eukaryot Microbiol 2015; 63:309-17. [PMID: 26509699 DOI: 10.1111/jeu.12280] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 10/18/2015] [Accepted: 10/21/2015] [Indexed: 12/13/2022]
Abstract
To quantitatively assess the risk of contamination by Pneumocystis depending on the degree of immunosuppression (ID) of the exposed rat hosts, we developed an animal model, where rats went through different doses of dexamethasone. Then, natural and aerial transmission of Pneumocystis carinii occurred during cohousing of the rats undergoing gradual ID levels (receivers) with nude rats developing pneumocystosis (seeders). Following contact between receiver and seeder rats, the P. carinii burden of receiver rats was determined by toluidine blue ortho staining and by qPCR targeting the dhfr monocopy gene of this fungus. In this rat model, the level of circulating CD4(+) and CD8(+) T lymphocytes remained significantly stable and different for each dose of dexamethasone tested, thus reaching the goal of a new stable and gradual ID rat model. In addition, an inverse relationship between the P. carinii burden and the level of circulating CD4(+) or CD8(+) T lymphocytes was evidenced. This rat model may be used to study other opportunistic pathogens or even co-infections in a context of gradual ID.
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Affiliation(s)
- Sara Khalife
- Biology and Diversity of Emerging Eukaryotic Pathogens (BDPEE), Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, F-59000, Lille, France.,Health and Environment Microbiology Laboratory, AZM Center for Research in Biotechnology and its Application, Doctoral School of Sciences and Technology, Lebanese University, Tripoli, Lebanon
| | - Magali Chabé
- Biology and Diversity of Emerging Eukaryotic Pathogens (BDPEE), Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, F-59000, Lille, France.,Department of Parasitology, Faculty of Pharmacy of Lille, Univ. Lille, F-59000, Lille, France
| | - Nausicaa Gantois
- Biology and Diversity of Emerging Eukaryotic Pathogens (BDPEE), Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, F-59000, Lille, France
| | | | - Muriel Pottier
- Biology and Diversity of Emerging Eukaryotic Pathogens (BDPEE), Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, F-59000, Lille, France.,Department of Parasitology, Faculty of Pharmacy of Lille, Univ. Lille, F-59000, Lille, France
| | - Sani Hlais
- Health and Environment Microbiology Laboratory, AZM Center for Research in Biotechnology and its Application, Doctoral School of Sciences and Technology, Lebanese University, Tripoli, Lebanon
| | - Claire Pinçon
- EA2694, Department of Biostatistics, Faculty of Pharmacy of Lille, Univ. Lille, F-59000, Lille, France
| | - Thierry Chassat
- Animal Unit, Pasteur Institute of Lille, F-59000, Lille, France
| | - Christine Pierrot
- Molecular Signaling and the Control of Parasite Growth and Differentiation, Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, F-59000, Lille, France
| | - Jamal Khalife
- Molecular Signaling and the Control of Parasite Growth and Differentiation, Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, F-59000, Lille, France
| | - Cécile-Marie Aliouat-Denis
- Biology and Diversity of Emerging Eukaryotic Pathogens (BDPEE), Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, F-59000, Lille, France.,Department of Parasitology, Faculty of Pharmacy of Lille, Univ. Lille, F-59000, Lille, France
| | - El Moukhtar Aliouat
- Biology and Diversity of Emerging Eukaryotic Pathogens (BDPEE), Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, F-59000, Lille, France.,Department of Parasitology, Faculty of Pharmacy of Lille, Univ. Lille, F-59000, Lille, France.,Molecular Signaling and the Control of Parasite Growth and Differentiation, Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, F-59000, Lille, France
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Ngoc Linh Nguyen D, Deschaght P, Merlin S, Loywick A, Audebert C, Viscogliosi E, Vaneechoutte M, Delhaes L. Intérêt d’un prétraitement par PMA dans l’analyse du microbiote pro- et eucaryotique pulmonaire. J Mycol Med 2015. [DOI: 10.1016/j.mycmed.2015.06.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Nguyen L, Deschaght P, Merlin S, Loywick A, Audebert C, Viscogliosi E, Vaneechoutte M, Delhaes L. 49 Propidium monoazide (PMA) sample pretreatment impacts the abundance of rare populations in high-throughput sequencing analysis of CF lung mycobiome and bacteriome. J Cyst Fibros 2015. [DOI: 10.1016/s1569-1993(15)30226-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
During a pathogen outbreak, the emergency resides in the identification and characterization of the infectious agent. In addition to the traditional phenotypic methods which are still widely used, the molecular biology is nowadays a common approach of clinical microbiology labs and the pathogen can be identified by comparing its molecular fingerprint to a data-bank. High-throughput sequencing should allow overcoming this single identification to exploit the whole information encoded in the pathogen genome. This evolution, supported by an increasing number of proof-of-concept studies, should result in moving from detection through fingerprints to the use of the pathogen whole genome; this forensic profile should allow the adaptation of the treatment to the pathogen specificities. From concept to routine use, many parameters need to be considered to promote high-throughput sequencing as a powerful tool to help physicians and clinicians in microbiological investigations.
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Affiliation(s)
- Christophe Audebert
- Gènes Diffusion, Douai, France - Pegase-Biosciences, Institut Pasteur de Lille, 1, rue du professeur Calmette, 59019 Lille, France
| | - David Hot
- U1019, UMR8204, Université de Lille, France - Pegase-Biosciences, Institut Pasteur de Lille, 1, rue du professeur Calmette, 59019 Lille, France
| | - Yves Lemoine
- FRE3642, Université de Lille, France - Pegase-Biosciences, Institut Pasteur de Lille, 1, rue du professeur Calmette, 59019 Lille, France
| | - Ségolène Caboche
- FRE3642, Université de Lille, France - Pegase-Biosciences, Institut Pasteur de Lille, 1, rue du professeur Calmette, 59019 Lille, France
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Khalife S, Chabe M, Gantois N, Audebert C, Pottier M, Dabboussi F, Hamze M, Hlais S, C.-M. AD, Aliouat E. Étude de la colonisation par Pneumocystis carinii en fonction du degré d’immunodépression dans un modèle naturel de transmission aérienne du microchampignon. J Mycol Med 2014. [DOI: 10.1016/j.mycmed.2014.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Ngoc LND, Dassoneville R, Chabe M, Gantois N, Prevotat A, Perez T, Wallaert B, Audebert C, Goffart A, Viscogliosi E, Delhaes L. Lung mycobiota from patients with cystic fibrosis: Recent updates and links with other microbial communities. J Mycol Med 2014. [DOI: 10.1016/j.mycmed.2014.06.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Chabé M, Khalife S, Gantois N, Even G, Audebert C. An improved single-round PCR leads to rapid and highly sensitive detection of Pneumocystis spp. Med Mycol 2014; 52:841-6. [DOI: 10.1093/mmy/myu032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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25
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Seesao Y, Audebert C, Verrez-Bagnis V, Merlin S, Jérôme M, Viscogliosi E, Dei-Cas E, Aliouat-Denis CM, Gay M. Monitoring of four DNA extraction methods upstream of high-throughput sequencing of Anisakidae nematodes. J Microbiol Methods 2014; 102:69-72. [PMID: 24845469 DOI: 10.1016/j.mimet.2014.05.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 05/09/2014] [Accepted: 05/09/2014] [Indexed: 11/18/2022]
Abstract
Different methods were evaluated to extract DNA from pooled nematodes belonging to Anisakis, Contracaecum, Pseudoterranova and Hysterothylacium genera isolated from edible fish. Pooled DNA extraction is the first and compulsory step to allow the identification of a large number of samples through high-throughput DNA sequencing with drastic time and cost reductions.
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Affiliation(s)
- Y Seesao
- ANSES, Lab. Sécurité des Aliments, Dept Produits de la Pêche et de l'Aquaculture, Boulogne-sur-mer, France; Biologie et Diversité des Pathogènes Eucaryotes Emergents, Institut Pasteur de Lille (IPL), Centre d'Infection et d'Immunité de Lille (CIIL), UMR CNRS 8204, Inserm U1019, Univ. Lille Nord de France, France
| | - C Audebert
- Gènes Diffusion, Douai, France; PEGASE-Biosciences, Institut Pasteur de Lille, France
| | | | - S Merlin
- Gènes Diffusion, Douai, France; PEGASE-Biosciences, Institut Pasteur de Lille, France
| | | | - E Viscogliosi
- Biologie et Diversité des Pathogènes Eucaryotes Emergents, Institut Pasteur de Lille (IPL), Centre d'Infection et d'Immunité de Lille (CIIL), UMR CNRS 8204, Inserm U1019, Univ. Lille Nord de France, France
| | - E Dei-Cas
- Biologie et Diversité des Pathogènes Eucaryotes Emergents, Institut Pasteur de Lille (IPL), Centre d'Infection et d'Immunité de Lille (CIIL), UMR CNRS 8204, Inserm U1019, Univ. Lille Nord de France, France
| | - C M Aliouat-Denis
- Biologie et Diversité des Pathogènes Eucaryotes Emergents, Institut Pasteur de Lille (IPL), Centre d'Infection et d'Immunité de Lille (CIIL), UMR CNRS 8204, Inserm U1019, Univ. Lille Nord de France, France.
| | - M Gay
- ANSES, Lab. Sécurité des Aliments, Dept Produits de la Pêche et de l'Aquaculture, Boulogne-sur-mer, France
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26
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Benamrouz S, Conseil V, Chabé M, Praet M, Audebert C, Blervaque R, Guyot K, Gazzola S, Mouray A, Chassat T, Delaire B, Goetinck N, Gantois N, Osman M, Slomianny C, Dehennaut V, Lefebvre T, Viscogliosi E, Cuvelier C, Dei-Cas E, Creusy C, Certad G. Cryptosporidium parvum-induced ileo-caecal adenocarcinoma and Wnt signaling in a mouse model. Dis Model Mech 2014; 7:693-700. [PMID: 24652769 PMCID: PMC4036476 DOI: 10.1242/dmm.013292] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Cryptosporidium species are apicomplexan protozoans that are found worldwide. These parasites constitute a large risk to human and animal health. They cause self-limited diarrhea in immunocompetent hosts and a life-threatening disease in immunocompromised hosts. Interestingly, Cryptosporidium parvum has been related to digestive carcinogenesis in humans. Consistent with a potential tumorigenic role of this parasite, in an original reproducible animal model of chronic cryptosporidiosis based on dexamethasone-treated or untreated adult SCID mice, we formerly reported that C. parvum (strains of animal and human origin) is able to induce digestive adenocarcinoma even in infections induced with very low inoculum. The aim of this study was to further characterize this animal model and to explore metabolic pathways potentially involved in the development of C. parvum-induced ileo-caecal oncogenesis. We searched for alterations in genes or proteins commonly involved in cell cycle, differentiation or cell migration, such as β-catenin, Apc, E-cadherin, Kras and p53. After infection of animals with C. parvum we demonstrated immunohistochemical abnormal localization of Wnt signaling pathway components and p53. Mutations in the selected loci of studied genes were not found after high-throughput sequencing. Furthermore, alterations in the ultrastructure of adherens junctions of the ileo-caecal neoplastic epithelia of C. parvum-infected mice were recorded using transmission electron microscopy. In conclusion, we found for the first time that the Wnt signaling pathway, and particularly the cytoskeleton network, seems to be pivotal for the development of the C. parvum-induced neoplastic process and cell migration of transformed cells. Furthermore, this model is a valuable tool in understanding the host-pathogen interactions associated with the intricate infection process of this parasite, which is able to modulate host cytoskeleton activities and several host-cell biological processes and remains a significant cause of infection worldwide.
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Affiliation(s)
- Sadia Benamrouz
- Ecologie et biodiversité, Faculté Libre des Sciences et Technologies de Lille, Université Catholique de Lille, Université Lille Nord de France, 59020 Lille, France. Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France
| | - Valerie Conseil
- Ecologie et biodiversité, Faculté Libre des Sciences et Technologies de Lille, Université Catholique de Lille, Université Lille Nord de France, 59020 Lille, France. Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France
| | - Magali Chabé
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France. Faculté de Pharmacie, Université Lille Nord de France, 59021 Lille, France
| | - Marleen Praet
- Academic Department of Pathology, Ghent University, 9000 Ghent, Belgium
| | - Christophe Audebert
- PEGASE-Biosciences, Institut Pasteur de Lille, F-59021 Lille, France. Gene Diffusion, 59501 Douai, France
| | - Renaud Blervaque
- PEGASE-Biosciences, Institut Pasteur de Lille, F-59021 Lille, France. Transcriptomic and Applied Genomic (TAG), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8404, Université Lille Nord de France, 59021 Lille, France
| | - Karine Guyot
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France
| | - Sophie Gazzola
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France
| | - Anthony Mouray
- Plateforme d'Expérimentations et de Hautes Technologies Animales, Institut Pasteur de Lille, 59021 Lille, France
| | - Thierry Chassat
- Plateforme d'Expérimentations et de Hautes Technologies Animales, Institut Pasteur de Lille, 59021 Lille, France
| | - Baptiste Delaire
- Service d'Anatomie et de Cytologie Pathologiques, Groupe Hospitalier de l'Université Catholique de Lille, 59020 Lille, France
| | - Nathalie Goetinck
- Centre Hospitalier Régional et Universitaire de Lille, Université Lille Nord de France, 59000 Lille, France
| | - Nausicaa Gantois
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France
| | - Marwan Osman
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France. Centre AZM pour la Recherche en Biotechnologie et ses Applications, Laboratoire Microbiologie, Santé et Environnement, Université Libanaise, Tripoli, Lebanon
| | - Christian Slomianny
- Inserm U1003, Laboratoire de Physiologie Cellulaire, Université Lille 1, 59655 Villeneuve d'Ascq CEDEX, France
| | - Vanessa Dehennaut
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR CNRS 8576, IFR 147, Université Lille1, 59650 Villeneuve d'Ascq, France
| | - Tony Lefebvre
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR CNRS 8576, IFR 147, Université Lille1, 59650 Villeneuve d'Ascq, France
| | - Eric Viscogliosi
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France
| | - Claude Cuvelier
- Academic Department of Pathology, Ghent University, 9000 Ghent, Belgium
| | - Eduardo Dei-Cas
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France. Centre Hospitalier Régional et Universitaire de Lille, Université Lille Nord de France, 59000 Lille, France
| | - Colette Creusy
- Service d'Anatomie et de Cytologie Pathologiques, Groupe Hospitalier de l'Université Catholique de Lille, 59020 Lille, France
| | - Gabriela Certad
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France.
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Rey M, Micallef J, Audebert C, Blin O. Effets des agonistes dopaminergiques sur la somnolence chez le sujet sain. Neurophysiol Clin 2002. [DOI: 10.1016/s0987-7053(02)00315-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Van de Walle JP, Panagides D, Fourcade L, Audebert C, Touze JE, Bory M. [Vagal syncope in young adults: specificity of the tilt-table test]. Presse Med 1995; 24:885-8. [PMID: 7638127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
OBJECTIVE The head-up tilt test has been used for more than 10 years to reproduce vagal lipothymia. The criteria for a positive test and specificity are however still lacking. METHOD Thirty male volunteers, age 18 to 35 years, with no past history of lipothymia nor any signs of hypervagotonicity at physical examination, on fasting blood samples or on exercise tests with sudden interruption and Holter recording were selected for the study. Two head-up tilt tests at 60 degrees for 45 minutes were conducted, one with no presensitivisation and the other with a bolus of isoproterenol (2, 4, 6 and 8 micrograms) starting 30 minutes after the beginning of the test. Blood pressure was measured throughout the test. RESULTS The systolic blood pressure curves showed drops of more than 30 mmHg accompanied by spontaneously resolving clinical signs in 6 of the 30 subjects during the non-sensitized tests and in 14 out of 30 during the sensitized tests. A symptomatic drop in systolic blood pressure of more than 30 mmHg compared to the moment before the malaise accompanied by clinical signs which did not resolve within 1 minute and required returning to the supine position occurred in one volunteer during a non-sensibilized test. This same type of reaction was observed in 4 volunteers during sensitized tests, three times after an isoproterenol bolus. CONCLUSION Taking this later manifestation as the criteria for a positive head-up tilt test, the specificity of the non-sensitized and isoproterenol-sensitized tests in the young adult are 96.7 and 86.7% respectively. These findings must be considered with caution since there is no proof that these young men with no past history of hypervagotonicity but a positive head-up tilt test may be one day confronted with a situation generating a vagal reaction.
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Lacarelle B, Blin O, Audebert C, Auquier P, Karsenty H, Horriere F, Durand A. The quinolone, flumequine, has no effect on theophylline pharmacokinetics. Eur J Clin Pharmacol 1994; 46:477-8. [PMID: 7957547 DOI: 10.1007/bf00191915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The kinetics of a single i.v. dose of theophylline given either alone or with flumequine was studied in eight healthy volunteers. No statistically significant differences were observed in the pharmacokinetic parameters of theophylline (volume of distribution, elimination half-life, AUC, plasma clearance) following the two treatments. Pretreatment for 5 days with oral flumequine (400 mg, three times daily) had no significant effect on the disposition of a single i.v. dose of theophylline in healthy volunteers.
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Affiliation(s)
- B Lacarelle
- Centre de Pharmacologie Clinique et d'Evaluations Thérapeutiques, CHU Timone Adultes, Marseille, France
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31
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Blin O, Mestre D, Paut O, Vercher JL, Audebert C. GABA-ergic control of visual perception in healthy volunteers: effects of midazolam, a benzodiazepine, on spatio-temporal contrast sensitivity. Br J Clin Pharmacol 1993; 36:117-24. [PMID: 8398579 PMCID: PMC1364574 DOI: 10.1111/j.1365-2125.1993.tb04206.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
1. We studied the effects of midazolam (MDZ), a benzodiazepine, on spatio-temporal contrast sensitivity, choice reaction time, and mood visual analogue scales in healthy volunteers. 2. Eight extensively trained, healthy volunteers were included in a placebo-controlled cross-over double-blind trial of MDZ (0.15 mg kg-1). Treatments were injected intramuscularly and evaluations were performed before and 0.5, 1, 2, 3 and 4 h after drug administration. Spatio-temporal contrast sensitivity was measured using a micro-computer with appropriate software. Stimuli were vertical gratings with adjustable contrast, with spatial frequencies of 0.25, 1 and 4 cpd. Four conditions of temporal modulation were used: the grating was either static or drifting laterally with temporal frequencies of 1, 3 and 9 Hz. 3. An analysis of variance was performed on the data. As compared with placebo, MDZ induced an increase in choice reaction time and sedation (as assessed on visual analogue scales). From 0.5-4 h after the injection, MDZ produced an overall decrease in visual sensitivity, as compared with placebo. More specifically, MDZ preferentially affected medium to high spatial frequencies and low temporal frequencies. Several non-exclusive hypotheses may account for the results: 1) an increase in the size of the receptive fields, 2) a preferential effect on the visual parvocellular pathways which mediate the sensitivity to high spatial and low temporal frequencies.
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Affiliation(s)
- O Blin
- Pharmacologie Médicale et Clinique and CPCET, CHU Timone, Marseille, France
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32
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Audebert C, Blin O, Monjanel-Mouterde S, Auquier P, Pedarriosse AM, Dingemanse J, Durand A, Cano JP. Influence of food on the tyramine pressor effect during chronic moclobemide treatment of healthy volunteers. Eur J Clin Pharmacol 1992; 43:507-12. [PMID: 1483487 DOI: 10.1007/bf02285092] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
An open study was carried out to examine the effect of moclobemide, a new antidepressant reversible inhibitor of MAO-A, on the pressor response induced by oral tyramine added to meals of different lipid and protein composition, and to correlate the blood pressure increase in the tyramine test with that obtained during an exercise test. Eight healthy volunteers of both sexes participated in the study. A tyramine sensitivity and an exercise test were performed beforehand. Subjects were included if, under fasting condition, their systolic blood pressure (SBP) increased by more than 30 mmHg after administration of 400 or 600 mg tyramine. Exercise tests were performed to determine the grade of effort that corresponded to a rise in SBP of 30 mmHg. Subjects received moclobemide 600 mg/d. Starting on Day 7, each subject consumed a standardized meal (52 g lipids, 43 g proteins, 86 g carbohydrates) just before taking moclobemide. Tyramine was added to these meals in daily increasing doses of 50, 100, 150...mg until an increase in SBP > or = 30 mmHg was obtained. On moclobemide treatment, an average dose of 250 mg tyramine (range 150-400 mg) increased SBP by 36.6 mmHg. The time to reach peak SBP was longer (175 min) than in the fasting condition before the trial (40.6 min).(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- C Audebert
- Centre de Pharmacologie Clinique et d'Evaluations Therapeutiques, Marseille, France
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33
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Le Luyer B, Menager V, Audebert C, Le Roux P, Briquet MT, Boulloche J. [Inflammatory joint disease as a manifestation of Toxocara canis larva migrans]. Ann Pediatr (Paris) 1990; 37:445-8. [PMID: 2256639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We report a case of migrating joint involvement occurring as the first manifestation of Toxocara canis larva migrans. We also reviewed the literature on joint disease caused by parasitic infections. Diagnostic criteria are described. We suggest that an immunoallergic mechanism is involved. Furthermore, the therapeutic trial with thiabendazole contributed usefully to the diagnosis in our patient.
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Affiliation(s)
- B Le Luyer
- Département de Pédiatrie, Centre Hospitalier du Havre
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34
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Panagides D, Amabile G, Deharo JC, Audebert C, Djiane P, Bory M. [Late potentials in patients with hypertension]. Arch Mal Coeur Vaiss 1990; 83:1165-8. [PMID: 2148074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
UNLABELLED The presence of late potentials (LP) is considered as the evidence of an anatomical and electrophysiological condition which can give rise to life threatening ventricular arrhythmias. The aim of this work has been to study the incidence of LP in the setting of hypertension and to study their relation to ventricular hypertrophy on one hand and to ventricular arrhythmias on the other. Our study was conducted in 45 hypertensive patients (mean age +/- SD = 53 +/- 12). None of them had clinical evidences of a coronaropathy and only 5 had never been treated. For every patient we carried out a signal averaged electrocardiogram to detect LP, an echocardiogram to determine the myocardial mass index and 48 hours Holter monitoring to record ventricular arrhythmias filed according to the Lown classification. RESULTS LP have been found in 13 patients. The following table summaries relations between LP, ventricular arrhythmias and myocardial hypertrophy: [table: see text] CONCLUSION LP are frequently found in hypertensive patients (29%); their incidence is not higher in patients with left ventricular hypertrophy although they more frequently have serious ventricular arrhythmias; the severity of ventricular arrhythmias is not correlated with the presence of LP.
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Affiliation(s)
- D Panagides
- Service de cardiologie, CHU Timone, Marseille
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35
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Leroy D, Dompmartin A, Lorier E, Leport Y, Audebert C. Photosensitivity induced by fenofibrate. Photodermatol Photoimmunol Photomed 1990; 7:136-7. [PMID: 2081120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- D Leroy
- Department of Dermatology of Caen, France
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36
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Audebert C. Treatment of mucoid cysts of fingers and toes by injection of sclerosant. Dermatol Clin 1989; 7:179-81. [PMID: 2920462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Mucoid cysts of the fingers and toes may be cured by injection of a sclerosant such as sodium tetradecyl sulfate. Easy to perform and inexpensive, this technique appears to be without complications. Most patients are cured after a single injection. Very few need a second or third injection. Relapses are uncommon.
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Affiliation(s)
- C Audebert
- Unité de Dermatologie, Centre Hospitalier, Le Havre, France
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37
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Leroy D, Dompmartin A, Lauret P, Boullie MC, Audebert C. Allergic contact dermatitis to Bryozoa and photosensitivity. Photodermatol 1988; 5:227-9. [PMID: 2906119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- D Leroy
- Department of Dermatology of Caen, France
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Kellershohn C, Audebert C, Fortier D, Rimbert J, Hubert C. A Mössbauer spectrometry study of iron in hepatic and splenic tissues. Preliminary results. ACTA ACUST UNITED AC 1980. [DOI: 10.1051/rphysap:019800015060117500] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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40
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Audebert C, Lamoureux P. [Professional eczema of trawlermen by contact with bryozoaires in the "baie de scine" (first French cases 1975-1977) (author's transl)]. Ann Dermatol Venereol 1978; 105:187-92. [PMID: 150246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Since 1972 in the "Baie de Seine" trawlermen have been affected with a particular eczema of hands and forearms. It is caused by repeated contact with a bryozoaire, Alcyonidium gelatinosum and patch-tests are positive. A survey of 120 trawlermen in Le Havre has shown 13 cases.
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41
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Audebert C. [A simple treatment for ichthyosis: occlusive propylen glycol dressings]. Ann Dermatol Venereol 1977; 104:423-4. [PMID: 921175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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