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Selle A, Brosseau C, Dijk W, Duval A, Bouchaud G, Rousseaux A, Bruneau A, Cherbuy C, Mariadassou M, Cariou V, Barbarot S, Bodinier M. Prebiotic Supplementation During Gestation Induces a Tolerogenic Environment and a Protective Microbiota in Offspring Mitigating Food Allergy. Front Immunol 2022; 12:745535. [PMID: 35069524 PMCID: PMC8769244 DOI: 10.3389/fimmu.2021.745535] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [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: 07/22/2021] [Accepted: 10/29/2021] [Indexed: 12/17/2022] Open
Abstract
Food allergy is associated with alterations in the gut microbiota, epithelial barrier, and immune tolerance. These dysfunctions are observed within the first months of life, indicating that early intervention is crucial for disease prevention. Preventive nutritional strategies with prebiotics are an attractive option, as prebiotics such as galacto-oligosaccharides and inulin can promote tolerance, epithelial barrier reinforcement, and gut microbiota modulation. Nonetheless, the ideal period for intervention remains unknown. Here, we investigated whether galacto-oligosaccharide/inulin supplementation during gestation could protect offspring from wheat allergy development in BALB/cJRj mice. We demonstrated that gestational prebiotic supplementation promoted the presence of beneficial strains in the fecal microbiota of dams during gestation and partially during mid-lactation. This specific microbiota was transferred to their offspring and maintained to adulthood. The presence of B and T regulatory immune cell subsets was also increased in the lymph nodes of offspring born from supplemented mothers, suggestive of a more tolerogenic immune environment. Indeed, antenatal prebiotic supplementation reduced the development of wheat allergy symptoms in offspring. Our study thus demonstrates that prebiotic supplementation during pregnancy induces, in the offspring, a tolerogenic environment and a microbial imprint that mitigates food allergy development.
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Affiliation(s)
- Amandine Selle
- Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE), UR1268 Biopolymères Interactions Assemblages (BIA), Nantes, France
| | - Carole Brosseau
- Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE), UR1268 Biopolymères Interactions Assemblages (BIA), Nantes, France
| | - Wieneke Dijk
- Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE), UR1268 Biopolymères Interactions Assemblages (BIA), Nantes, France
| | - Angéline Duval
- Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE), UR1268 Biopolymères Interactions Assemblages (BIA), Nantes, France
| | - Grégory Bouchaud
- Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE), UR1268 Biopolymères Interactions Assemblages (BIA), Nantes, France
| | - Anais Rousseaux
- Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE), UR1268 Biopolymères Interactions Assemblages (BIA), Nantes, France
| | - Aurélia Bruneau
- Micalis Institute, Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE), AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Claire Cherbuy
- Micalis Institute, Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE), AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Mahendra Mariadassou
- MaIAGE, UR1404, Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE), Jouy-en-Josas, France
| | - Véronique Cariou
- StatSC, École nationale vétérinaire, agroalimentaire et de l'alimentation de Nantes-Atlantique (ONIRIS), Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE), Nantes, France
| | - Sebastien Barbarot
- Department of Dermatology, Centre Hospitalier Universitaire (CHU) Nantes, Nantes, France.,Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE) Pays de la Loire, UMR1280 PhAN, Nantes, France
| | - Marie Bodinier
- Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE), UR1268 Biopolymères Interactions Assemblages (BIA), Nantes, France
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2
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Bermudez-Martin P, Becker JAJ, Caramello N, Fernandez SP, Costa-Campos R, Canaguier J, Barbosa S, Martinez-Gili L, Myridakis A, Dumas ME, Bruneau A, Cherbuy C, Langella P, Callebert J, Launay JM, Chabry J, Barik J, Le Merrer J, Glaichenhaus N, Davidovic L. The microbial metabolite p-Cresol induces autistic-like behaviors in mice by remodeling the gut microbiota. Microbiome 2021; 9:157. [PMID: 34238386 PMCID: PMC8268286 DOI: 10.1186/s40168-021-01103-z] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 05/27/2021] [Indexed: 05/06/2023]
Abstract
BACKGROUND Autism spectrum disorders (ASD) are associated with dysregulation of the microbiota-gut-brain axis, changes in microbiota composition as well as in the fecal, serum, and urine levels of microbial metabolites. Yet a causal relationship between dysregulation of the microbiota-gut-brain axis and ASD remains to be demonstrated. Here, we hypothesized that the microbial metabolite p-Cresol, which is more abundant in ASD patients compared to neurotypical individuals, could induce ASD-like behavior in mice. RESULTS Mice exposed to p-Cresol for 4 weeks in drinking water presented social behavior deficits, stereotypies, and perseverative behaviors, but no changes in anxiety, locomotion, or cognition. Abnormal social behavior induced by p-Cresol was associated with decreased activity of central dopamine neurons involved in the social reward circuit. Further, p-Cresol induced changes in microbiota composition and social behavior deficits could be transferred from p-Cresol-treated mice to control mice by fecal microbiota transplantation (FMT). We also showed that mice transplanted with the microbiota of p-Cresol-treated mice exhibited increased fecal p-Cresol excretion, compared to mice transplanted with the microbiota of control mice. In addition, we identified possible p-Cresol bacterial producers. Lastly, the microbiota of control mice rescued social interactions, dopamine neurons excitability, and fecal p-Cresol levels when transplanted to p-Cresol-treated mice. CONCLUSIONS The microbial metabolite p-Cresol induces selectively ASD core behavioral symptoms in mice. Social behavior deficits induced by p-Cresol are dependant on changes in microbiota composition. Our study paves the way for therapeutic interventions targeting the microbiota and p-Cresol production to treat patients with ASD. Video abstract.
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Affiliation(s)
- Patricia Bermudez-Martin
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
| | - Jérôme A J Becker
- Physiologie de la Reproduction et des Comportements, UMR0075 INRAE, UMR7247 CNRS, IFCE, Inserm, Université François Rabelais, 37380, Nouzilly, France
- UMR 1253, iBrain, Université de Tours, Inserm, CNRS, Tours, 37200, France
| | - Nicolas Caramello
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
- Current address: Structural Biology, Radiation Facility, European Synchrotron, Grenoble, France
| | - Sebastian P Fernandez
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
| | - Renan Costa-Campos
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
| | - Juliette Canaguier
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
| | - Susana Barbosa
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
| | - Laura Martinez-Gili
- Division of Systems Medicine, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, SW7 2AZ, UK
| | - Antonis Myridakis
- Division of Systems Medicine, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, SW7 2AZ, UK
| | - Marc-Emmanuel Dumas
- Division of Systems Medicine, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, SW7 2AZ, UK
- Genomic and Environmental Medicine, National Heart & Lung Institute, Faculty of Medicine, Imperial College London, London, SW3 6KY, UK
- European Genomic Institute for Diabetes, CNRS UMR 8199, INSERM UMR 1283, Institut Pasteur de Lille, Lille University Hospital, University of Lille, 59045, Lille, France
- McGill University and Genome Quebec Innovation Centre, 740 Doctor Penfield Avenue, Montréal, QC, H3A 0G1, Canada
| | - Aurélia Bruneau
- AgroParisTech, INRAE, Institut Micalis, Université Paris-Saclay, Jouy-en-Josas, France
| | - Claire Cherbuy
- AgroParisTech, INRAE, Institut Micalis, Université Paris-Saclay, Jouy-en-Josas, France
| | - Philippe Langella
- AgroParisTech, INRAE, Institut Micalis, Université Paris-Saclay, Jouy-en-Josas, France
| | - Jacques Callebert
- UMR-S 942, INSERM, Department of Biochemistry, Lariboisière Hospital, Paris, France
- Centre for Biological Resources, BB-0033-00064, Lariboisière Hospital, Paris, France
| | - Jean-Marie Launay
- UMR-S 942, INSERM, Department of Biochemistry, Lariboisière Hospital, Paris, France
- Centre for Biological Resources, BB-0033-00064, Lariboisière Hospital, Paris, France
| | - Joëlle Chabry
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
| | - Jacques Barik
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
| | - Julie Le Merrer
- Physiologie de la Reproduction et des Comportements, UMR0075 INRAE, UMR7247 CNRS, IFCE, Inserm, Université François Rabelais, 37380, Nouzilly, France
- UMR 1253, iBrain, Université de Tours, Inserm, CNRS, Tours, 37200, France
| | - Nicolas Glaichenhaus
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
- Fondation FondaMental, Créteil, France
| | - Laetitia Davidovic
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France.
- Fondation FondaMental, Créteil, France.
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3
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Gahier M, Hersant J, Hamel JF, Sempore Y, Bruneau A, Henni S, Abraham P. A Simple Scale for Screening Lower-Extremity Arterial Disease as a Possible Cause of Low Back Pain: a Cross-sectional Study Among 542 Subjects. J Gen Intern Med 2020; 35:1963-1970. [PMID: 32367389 PMCID: PMC7351938 DOI: 10.1007/s11606-020-05670-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 01/13/2020] [Indexed: 11/26/2022]
Abstract
BACKGROUND Epidemiological, imaging, and anatomical studies suggest an association between proximal arterial atherosclerosis and development of low back pain (LBP). OBJECTIVES We aimed to define (1) the frequency and (2) factors associated with exercise-induced proximal ischemia (EIPI) in individuals with LBP and (3) develop a clinical screening scale. DESIGN Monocentric cross-sectional study. PARTICIPANTS All patients with history of ongoing LBP referred to our exercise investigation laboratory for exercise transcutaneous oximetry (ex-tcPO2) between January 2011 and December 2017 (n = 542; mean age, 65.4 ± 10.9; 83.9% men). MAIN MEASURES EIPI was defined as a decrease from rest of oxygen pressure (DROP) below - 15 mmHg on the lumbar and/or buttock probes. Ex-tcPO2 is a reliable validated tool for diagnosing EIPI in comparison with arteriography and computed tomography angiography. Ex-tcPO2 was performed on a treadmill until symptom manifestation or exhaustion. Clinical data were collected using interview questionnaires, medical file review, and clinical examination. KEY RESULTS EIPI was diagnosed in 282 patients (52%). Age ≤ 70 years (OR, 2.22; 95% CI, 1.35-3.57; p = 0.002), a history of proximal revascularization (OR, 2.64; 95% CI, 1.50-4.65; p = 0.001), use of antiplatelet medication (OR, 1.71; 95% CI, 0.96-3.06; p = 0.069), a relationship between exercise and LBP (OR, 2.61; 95% CI, 1.49-4.57; p = 0.001), and an abnormal ankle to brachial index (OR, 2.87; 95% CI, 1.77-4.66; p < 0.0001) were identified as EIPI predictors. Using these items, we developed a screening scale that showed an area under the receiver operating characteristics curve of .756. At a score of ≥ 3, the sensitivity, specificity, and accuracy for EIPI were 84%, 55%, and 71%, respectively. CONCLUSIONS EIPI was common among our patients with LBP undergoing ex-TcPO2. Our screening scale could help better select the patients who require angiography.
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Affiliation(s)
- M Gahier
- Sports Medicine and Exercise Investigations, University Hospital, Angers, France.
| | - J Hersant
- Vascular Medicine, University Hospital, Angers, France
| | - J F Hamel
- Methodology and Biostatistics Department, Angers University Hospital, Angers, France
| | - Y Sempore
- Sports Medicine and Exercise Investigations, University Hospital, Angers, France
| | - A Bruneau
- Sports Medicine and Exercise Investigations, University Hospital, Angers, France
| | - S Henni
- Vascular Medicine, University Hospital, Angers, France
- UMR INSERM 1083 - CNRS 6015, Angers University Hospital, Angers, France
| | - P Abraham
- Sports Medicine and Exercise Investigations, University Hospital, Angers, France
- Vascular Medicine, University Hospital, Angers, France
- UMR INSERM 1083 - CNRS 6015, Angers University Hospital, Angers, France
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4
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Busnelli M, Manzini S, Jablaoui A, Bruneau A, Kriaa A, Philippe C, Arnaboldi F, Colombo A, Ferrari B, Ambrogi F, Maguin E, Rhimi M, Chiesa G, Gérard P. Fat-Shaped Microbiota Affects Lipid Metabolism, Liver Steatosis, and Intestinal Homeostasis in Mice Fed a Low-Protein Diet. Mol Nutr Food Res 2020; 64:e1900835. [PMID: 32579743 DOI: 10.1002/mnfr.201900835] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 08/02/2019] [Revised: 05/20/2020] [Indexed: 12/19/2022]
Abstract
SCOPE Protein malnutrition is characterized by stunted growth, hepatic steatosis and a damaged gut mucosal architecture. Since high-fat shaped gut microbiota (HFM) has an increased ability in providing nutrients and energy from food to the host, the aim of this study is to determine whether such a microbiota could beneficially impact on the consequences of malnutrition. METHODS AND RESULTS The cecal content of specific pathogen free C57Bl/6J mice fed a high-fat diet or a low-protein diet is transplanted in two groups of germ-free C57Bl/6J recipient mice, which are subsequently fed a low-protein diet for 8 weeks. Body weight gain is comparable between the two groups of microbiota-recipient mice. The HFM led to a worsening of microvesicular steatosis and a decrease of plasma lipids compared to the low-protein shaped microbiota. In the small intestine of mice receiving the HFM, although significant histological differences are not observed, the expression of antimicrobial genes promoting oxidative stress and immune response at the ileal epithelium (Duox2, Duoxa2, Saa1, Ang4, Defa5) is increased. CONCLUSION The transplant of HFM in mice fed a low-protein diet represents a noxious stimulus for the ileal mucosa and impairs hepatic lipoprotein secretion, favoring the occurrence of hepatic microvesicular steatosis.
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Affiliation(s)
- Marco Busnelli
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milano, 20133, Italy
| | - Stefano Manzini
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milano, 20133, Italy
| | - Amin Jablaoui
- Micalis Institute, Université Paris-Saclay, INRAE, AgroParisTech, Jouy-en-Josas, 78350, France
| | - Aurélia Bruneau
- Micalis Institute, Université Paris-Saclay, INRAE, AgroParisTech, Jouy-en-Josas, 78350, France
| | - Aïcha Kriaa
- Micalis Institute, Université Paris-Saclay, INRAE, AgroParisTech, Jouy-en-Josas, 78350, France
| | - Catherine Philippe
- Micalis Institute, Université Paris-Saclay, INRAE, AgroParisTech, Jouy-en-Josas, 78350, France
| | - Francesca Arnaboldi
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milano, 20133, Italy
| | - Alice Colombo
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milano, 20133, Italy
| | - Benedetta Ferrari
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milano, 20133, Italy
| | - Federico Ambrogi
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milano, 20133, Italy
| | - Emmanuelle Maguin
- Micalis Institute, Université Paris-Saclay, INRAE, AgroParisTech, Jouy-en-Josas, 78350, France
| | - Moez Rhimi
- Micalis Institute, Université Paris-Saclay, INRAE, AgroParisTech, Jouy-en-Josas, 78350, France
| | - Giulia Chiesa
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milano, 20133, Italy
| | - Philippe Gérard
- Micalis Institute, Université Paris-Saclay, INRAE, AgroParisTech, Jouy-en-Josas, 78350, France
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5
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Naudon L, François A, Mariadassou M, Monnoye M, Philippe C, Bruneau A, Dussauze M, Rué O, Rabot S, Meunier N. First step of odorant detection in the olfactory epithelium and olfactory preferences differ according to the microbiota profile in mice. Behav Brain Res 2020; 384:112549. [PMID: 32050097 DOI: 10.1016/j.bbr.2020.112549] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 01/16/2020] [Accepted: 02/08/2020] [Indexed: 02/09/2023]
Abstract
We have previously provided the first evidence that the microbiota modulates the physiology of the olfactory epithelium using germfree mice. The extent to which changes to the olfactory system depend on the microbiota is still unknown. In the present work, we explored if different microbiota would differentially impact olfaction. We therefore studied the olfactory function of three groups of mice of the same genetic background, whose parents had been conventionalized before mating with microbiota from three different mouse strains. Caecal short chain fatty acids profiles and 16S rRNA gene sequencing ascertained that gut microbiota differed between the three groups. We then used a behavioural test to measure the attractiveness of various odorants and observed that the three groups of mice differed in their attraction towards odorants. Their olfactory epithelium properties, including electrophysiological responses recorded by electro-olfactograms and expression of genes related to the olfactory transduction pathway, also showed several differences. Overall, our data demonstrate that differences in gut microbiota profiles are associated with differences in olfactory preferences and in olfactory epithelium functioning.
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Affiliation(s)
- Laurent Naudon
- Université Paris-Saclay, INRAE, AgroParisTech, CNRS, Micalis Institute, 78350, Jouy-en-Josas, France.
| | - Adrien François
- Université Paris-Saclay, UVSQ, INRAE, NBO, 78350, Jouy-en-Josas, F-78350, France
| | | | - Magali Monnoye
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| | - Catherine Philippe
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| | - Aurélia Bruneau
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| | - Marie Dussauze
- Université Paris-Saclay, UVSQ, INRAE, NBO, 78350, Jouy-en-Josas, F-78350, France
| | - Olivier Rué
- Université Paris-Saclay, INRAE, MaIAGE, 78350, Jouy-en-Josas, France
| | - Sylvie Rabot
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| | - Nicolas Meunier
- Université Paris-Saclay, UVSQ, INRAE, NBO, 78350, Jouy-en-Josas, F-78350, France
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6
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Abraham P, Zegar G, Hersant J, Rouvière O, Bruneau A, Ramondou P, Feugier P. Ankle and arm pressure recordings for the diagnosis of exercise-induced arterial endofibrosis. Vasc Invest Ther 2020. [DOI: 10.4103/vit.vit_13_20] [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: 11/04/2022] Open
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7
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Gerard P, Fei N, Bruneau A, Zhao L. MON-PO356: A Human Gut Bacterium Triggers Obesity and Non-Alcoholic Fatty Liver Disease in Germ-Free Mice Through LPS-Dependent Mechanism. Clin Nutr 2019. [DOI: 10.1016/s0261-5614(19)32191-0] [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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8
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Godet R, Bruneau A, Vielle B, Vincent F, Le Tourneau T, Carre F, Hupin D, Hamel JF, Abraham P, Henni S. Post-exercise ankle blood pressure and ankle to brachial index after heavy load bicycle exercise. Scand J Med Sci Sports 2018; 28:2144-2152. [PMID: 29858514 DOI: 10.1111/sms.13234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/28/2018] [Indexed: 11/30/2022]
Abstract
The American Heart Association (AHA) recommendations for diagnosing peripheral artery disease (PAD) after exercise are a decrease >20% of ankle brachial index (ABI) or >30 mm Hg of ankle systolic blood pressure (ASBP) from resting values. We evaluated ABI and ASBP values during incremental maximal exercise in physically active and asymptomatic patients. Patients (n = 726) underwent incremental bicycle tests with pre- and post-exercise recording of all four limbs arterial pressures simultaneously. Univariate and multivariate analyses were performed to define the correlation between post-exercise ABI with various clinical factors, including age. Thereafter, the population was divided into groups of age: less than 40 (G < 40), from 40 to 44 (G40/44) from 45 to 49 (G45/49), from 50 to 54 (G50/54), from 55 to 59 (G55/59), from 60 to 64 (G60/64), and 65 and above (G ≥ 65) years. Results are mean ± SD. * is two-tailed P < .05 for ANOVA with Dunnett's post-hoc test from G40. Changes from rest in ASBP were -3 ± 22 (G < 40), -2 ± 20 (G40/44), 4 ± 22* (G45/49), 10 ± 25* (G50/54), 18 ± 21* (G55/59), 23 ± 27* (G60/64), and 16 ± 22* (G ≥ 65) mm Hg. Decreases from rest in ABI were 32 ± 9 (G < 40), 33 ± 9 (G40/44), 29 ± 8 (G45/49), 27 ± 10* (G50/54), 24 ± 7* (G55/59), 22 ± 12* (G60/64), and 21 ± 12* (G ≥ 65) % of resting ABI. Maximal incremental exercise results in ABI and ASBP changes are mostly dependent on age. The AHA limits for post-exercise ABI are inadequate following maximal incremental bicycle testing. Future studies detecting PAD in active patients should account for the effect of age.
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Affiliation(s)
- R Godet
- Sports Medicine and Exercise Investigations, University Hospital, Angers, France
| | - A Bruneau
- Sports Medicine and Exercise Investigations, University Hospital, Angers, France
| | - B Vielle
- Maison de la recherche, University Hospital, Angers, France
| | - F Vincent
- University Hospital, Limoges, France
| | - T Le Tourneau
- Inserm U1087, Institute of Thorax, University Hospital, Nantes, France
| | - F Carre
- University Hospital, Rennes, France
| | - D Hupin
- Department of Clinical and Exercise Physiology, EA SNA EPIS 4607, University Hospital of Saint-Etienne, University of Lyon, Saint-Etienne, France
| | - J F Hamel
- Maison de la recherche, University Hospital, Angers, France
| | - P Abraham
- Sports Medicine and Exercise Investigations, University Hospital, Angers, France.,CNRS6015-INSERM1228 University of Angers, Angers, France
| | - S Henni
- Sports Medicine and Exercise Investigations, University Hospital, Angers, France.,CNRS6015-INSERM1228 University of Angers, Angers, France
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9
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Jaglin M, Rhimi M, Philippe C, Pons N, Bruneau A, Goustard B, Daugé V, Maguin E, Naudon L, Rabot S. Indole, a Signaling Molecule Produced by the Gut Microbiota, Negatively Impacts Emotional Behaviors in Rats. Front Neurosci 2018; 12:216. [PMID: 29686603 PMCID: PMC5900047 DOI: 10.3389/fnins.2018.00216] [Citation(s) in RCA: 139] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 03/19/2018] [Indexed: 12/22/2022] Open
Abstract
Gut microbiota produces a wide and diverse array of metabolites that are an integral part of the host metabolome. The emergence of the gut microbiome-brain axis concept has prompted investigations on the role of gut microbiota dysbioses in the pathophysiology of brain diseases. Specifically, the search for microbe-related metabolomic signatures in human patients and animal models of psychiatric disorders has pointed out the importance of the microbial metabolism of aromatic amino acids. Here, we investigated the effect of indole on brain and behavior in rats. Indole is produced by gut microbiota from tryptophan, through the tryptophanase enzyme encoded by the tnaA gene. First, we mimicked an acute and high overproduction of indole by injecting this compound in the cecum of conventional rats. This treatment led to a dramatic decrease of motor activity. The neurodepressant oxidized derivatives of indole, oxindole and isatin, accumulated in the brain. In addition, increase in eye blinking frequency and in c-Fos protein expression in the dorsal vagal complex denoted a vagus nerve activation. Second, we mimicked a chronic and moderate overproduction of indole by colonizing germ-free rats with the indole-producing bacterial species Escherichia coli. We compared emotional behaviors of these rats with those of germ-free rats colonized with a genetically-engineered counterpart strain unable to produce indole. Rats overproducing indole displayed higher helplessness in the tail suspension test, and enhanced anxiety-like behavior in the novelty, elevated plus maze and open-field tests. Vagus nerve activation was suggested by an increase in eye blinking frequency. However, unlike the conventional rats dosed with a high amount of indole, the motor activity was not altered and neither oxindole nor isatin could be detected in the brain. Further studies are required for a comprehensive understanding of the mechanisms supporting indole effects on emotional behaviors. As our findings suggest that people whose gut microbiota is highly prone to produce indole could be more likely to develop anxiety and mood disorders, we addressed the issue of the inter-individual variability of indole producing potential in humans. An in silico investigation of metagenomic data focused on the tnaA gene products definitively proved this inter-individual variability.
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Affiliation(s)
- Mathilde Jaglin
- Micalis Institute, Institut National de la Recherche Agronomique, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Moez Rhimi
- Micalis Institute, Institut National de la Recherche Agronomique, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Catherine Philippe
- Micalis Institute, Institut National de la Recherche Agronomique, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Nicolas Pons
- MetaGenoPolis, Institut National de la Recherche Agronomique, Université Paris-Saclay, Jouy-en-Josas, France
| | - Aurélia Bruneau
- Micalis Institute, Institut National de la Recherche Agronomique, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Bénédicte Goustard
- Micalis Institute, Institut National de la Recherche Agronomique, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Valérie Daugé
- Micalis Institute, Institut National de la Recherche Agronomique, AgroParisTech, Centre National de la Recherche Scientifique, Université Paris-Saclay, Jouy-en-Josas, France
| | - Emmanuelle Maguin
- Micalis Institute, Institut National de la Recherche Agronomique, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Laurent Naudon
- Micalis Institute, Institut National de la Recherche Agronomique, AgroParisTech, Centre National de la Recherche Scientifique, Université Paris-Saclay, Jouy-en-Josas, France
| | - Sylvie Rabot
- Micalis Institute, Institut National de la Recherche Agronomique, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
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Lewis GP, Siqueira GS, Banks H, Bruneau A. The majestic canopy-emergent genus Dinizia (Leguminosae: Caesalpinioideae), including a new species endemic to the Brazilian state of Espírito Santo. Kew Bull 2017; 72:48. [PMID: 32009686 PMCID: PMC6961463 DOI: 10.1007/s12225-017-9720-7] [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] [Figures] [Subscribe] [Scholar Register] [Accepted: 09/04/2017] [Indexed: 06/10/2023]
Abstract
Since its description, almost 100 years ago, the genus Dinizia has been treated as monospecific, comprising the single canopy-emergent species Dinizia excelsa Ducke which grows in non-flooded Amazonian forests of Guyana, Suriname and seven states of northern and central-western Brazil. Dinizia jueirana-facao G. P. Lewis & G. S. Siqueira, which grows in a restricted area of semi-deciduous Atlantic rain forest in Espírito Santo state, Brazil, is described as a new species in the genus. The new species is also a canopy-emergent of impressive stature. We provide descriptions for both species, a key to species identification, a distribution map and the new species is illustrated. Fossil leaves, inflorescences and fruit provide evidence for a Dinizia-like ancestor occurring in south-eastern North America during the Eocene. In contrast to D. excelsa where pollen is dispersed in tetrads, the pollen of D. jueirana-facao is shed in monads. D. jueirana-facao is considered critically endangered following IUCN conservation criteria, whereas D. excelsa is assessed to be of least concern. A lectotype is designated for D. excelsa.
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Affiliation(s)
- G. P. Lewis
- Comparative Plant and Fungal Biology Department, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AB UK
| | - G. S. Siqueira
- Herbário - Reserva Natural Vale, Meio Ambiente, BR 101, km 122, s/n., Caixa Postal 91, Sooretama, Espírito Santo 29.927–000 Brazil
| | - H. Banks
- Comparative Plant and Fungal Biology Department, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AB UK
| | - A. Bruneau
- Institut de recherche en biologie végétale and Département de sciences biologiques, Université de Montréal, Montréal, Québec H1X 2B2 Canada
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11
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Gagné F, Bruneau A, Turcotte P, Gagnon C, Lacaze E. An investigation of the immunotoxicity of oil sands processed water and leachates in trout leukocytes. Ecotoxicol Environ Saf 2017; 141:43-51. [PMID: 28314140 DOI: 10.1016/j.ecoenv.2017.03.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 01/25/2017] [Accepted: 03/07/2017] [Indexed: 06/06/2023]
Abstract
Increased oil sands (OS) mining activity has raised concerns about impacts on aquatic organisms. This study sought to examine the effects of single representative compounds from OS (benzo(a)pyrene, naphthalene), a mixture of naphthenic acids (NAs), OS-processed water (OSPW) and OS leachate (OSL) extracts on rainbow trout leukocytes. Primary cultures of trout leukocytes were exposed to increasing concentrations of benzo(a)pyrene, naphthalene, NAs, OSPW and OSL for 48h at 18°C. Immunocompetence was followed by measuring changes in lymphocyte and macrophage viability and phagocytosis. Changes in the expression of 10 transcripts were also followed: interleukin 1, 2 and 6 (Il-1, Il-2 and Il-6), calreticulin (CRT), caspase 9 (Cas9), aryl hydrocarbon receptor (AhR), cyclooxygenase-2 (COX2), glutathione S-transferase (GST), catalase (CAT) and p53 tumor suppressor. The results revealed that exposure to OSPW extracts decreased the capacity of macrophages to engulf three beads or more, while the other compounds generally increased phagocytosis activity. Lymphocyte apoptosis was increased by all compounds and mixtures except naphthalene. Both OSPW and OSL induced apoptosis in macrophages. At the gene expression level, Cas9, CRT, Il-1 (inhibition) and Il-2 were specifically influenced by OSPW, while CAT, p53, COX2 and Il-1 (induction) transcripts were specifically expressed by OSL. Leukocyte exposure to OSPW produced characteristic changes in immunocompetence and genes involved in proinflammatory, apoptosis and protein damage (CRT) pathways which could not be explained by OSL, benzo(a)pyrene, naphthalene and NA mixture.
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Affiliation(s)
- F Gagné
- Aquatic Contaminants Research Division, Water Science and Technology, Environment and Climate Change Canada, Montreal, Quebec H2Y 2E7, Canada.
| | - A Bruneau
- Aquatic Contaminants Research Division, Water Science and Technology, Environment and Climate Change Canada, Montreal, Quebec H2Y 2E7, Canada
| | - P Turcotte
- Aquatic Contaminants Research Division, Water Science and Technology, Environment and Climate Change Canada, Montreal, Quebec H2Y 2E7, Canada
| | - C Gagnon
- Aquatic Contaminants Research Division, Water Science and Technology, Environment and Climate Change Canada, Montreal, Quebec H2Y 2E7, Canada
| | - E Lacaze
- INRS-Institut Armand-Frappier, 531 des Prairies, Laval, Quebec H7V 1B7, Canada
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12
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Canouï E, Gauzit R, Alviset S, Bruneau A, Hays C, Launay O, Batista R, Kernéis S. Réévaluation des carbapénèmes dans la vraie vie : la conformité est-elle médecin-dépendante ? Med Mal Infect 2017. [DOI: 10.1016/j.medmal.2017.03.040] [Citation(s) in RCA: 1] [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: 11/29/2022]
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13
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Rabot S, Membrez M, Blancher F, Berger B, Moine D, Krause L, Bibiloni R, Bruneau A, Gérard P, Siddharth J, Lauber CL, Chou CJ. High fat diet drives obesity regardless the composition of gut microbiota in mice. Sci Rep 2016; 6:32484. [PMID: 27577172 PMCID: PMC5006052 DOI: 10.1038/srep32484] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 08/08/2016] [Indexed: 02/08/2023] Open
Abstract
The gut microbiota is involved in many aspects of host physiology but its role in body weight and glucose metabolism remains unclear. Here we studied the compositional changes of gut microbiota in diet-induced obesity mice that were conventionally raised or received microbiota transplantation. In conventional mice, the diversity of the faecal microbiota was weakly associated with 1st week weight gain but transferring the microbiota of mice with contrasting weight gain to germfree mice did not change obesity development or feed efficiency of recipients regardless whether the microbiota was taken before or after 10 weeks high fat (HF) feeding. Interestingly, HF-induced glucose intolerance was influenced by microbiota inoculation and improved glucose tolerance was associated with a low Firmicutes to Bacteroidetes ratio. Transplantation of Bacteroidetes rich microbiota compared to a control microbiota ameliorated glucose intolerance caused by HF feeding. Altogether, our results demonstrate that gut microbiota is involved in the regulation of glucose metabolism and the abundance of Bacteroidetes significantly modulates HF-induced glucose intolerance but has limited impact on obesity in mice. Our results suggest that gut microbiota is a part of complex aetiology of insulin resistance syndrome, individual microbiota composition may cause phenotypic variation associated with HF feeding in mice.
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Affiliation(s)
- Sylvie Rabot
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | | | | | | | - Déborah Moine
- Nestlé Research Centre, Lausanne, Switzerland.,Nestlé Institute of Health Sciences, Lausanne, Switzerland
| | - Lutz Krause
- Nestlé Research Centre, Lausanne, Switzerland
| | | | - Aurélia Bruneau
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Philippe Gérard
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Jay Siddharth
- Nestlé Institute of Health Sciences, Lausanne, Switzerland
| | | | - Chieh Jason Chou
- Nestlé Research Centre, Lausanne, Switzerland.,Nestlé Institute of Health Sciences, Lausanne, Switzerland
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14
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Bruneau A, Turcotte P, Pilote M, Gagné F, Gagnon C. Fate of silver nanoparticles in wastewater and immunotoxic effects on rainbow trout. Aquat Toxicol 2016; 174:70-81. [PMID: 26921728 DOI: 10.1016/j.aquatox.2016.02.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 02/18/2016] [Accepted: 02/18/2016] [Indexed: 05/22/2023]
Abstract
Silver nanoparticles (AgNPs) are currently used in technology, medicine and consumer products, even though the fate and the ecotoxicological risks on aquatic organisms of these new materials are not well known. The purpose of this study was to investigate the fate, bioavailability of AgNPs and their effects on fish in presence of municipal effluents. Juvenile rainbow trout were exposed for 96h to 40μg/L of AgNPs or 4μg/L of dissolved silver (AgNO3) in diluted (10%) municipal wastewater. Silver (Ag) concentrations were measured both on water samples and fish tissues (liver and gills). Toxicity was investigated by following immunological parameters in the pronephros (viability, phagocytosis) and biomarkers in liver and gills (cyclooxygenase activity, lipid peroxidation, glutathione-S-transferase, metallothioneins, DNA strand breaks and labile zinc). Results indicated that AgNPs appeared as small non-charged aggregates in wastewaters (11.7±1.4nm). In gills, the exposure to AgNPs induced morphological modifications without visible nanoparticle bioaccumulation. Dissolved Ag(+) was bioavailable in diluted effluent and induced oxidative stress (lipid peroxidation), labile zinc and a marginal decrease in superoxide dismutase in fish gills. Ag(+) also increased significantly metallothionein levels and inhibited the DNA repair activity in the liver. Finally, the two silver forms were found in liver and induced immunosuppression and inflammation (increase in cyclooxygenase activity). This study demonstrated that both forms of Ag produced harmful effects and AgNPs in wastewater were bioavailable to fish despite of their formation of aggregates.
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Affiliation(s)
- A Bruneau
- Aquatic Contaminants Research Division, Environment Canada, 105 McGill Street, Montreal, Quebec H2Y 2E7, Canada.
| | - P Turcotte
- Aquatic Contaminants Research Division, Environment Canada, 105 McGill Street, Montreal, Quebec H2Y 2E7, Canada
| | - M Pilote
- Aquatic Contaminants Research Division, Environment Canada, 105 McGill Street, Montreal, Quebec H2Y 2E7, Canada
| | - F Gagné
- Aquatic Contaminants Research Division, Environment Canada, 105 McGill Street, Montreal, Quebec H2Y 2E7, Canada
| | - C Gagnon
- Aquatic Contaminants Research Division, Environment Canada, 105 McGill Street, Montreal, Quebec H2Y 2E7, Canada.
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15
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Llopis M, Cassard AM, Wrzosek L, Boschat L, Bruneau A, Ferrere G, Puchois V, Martin JC, Lepage P, Le Roy T, Lefèvre L, Langelier B, Cailleux F, González-Castro AM, Rabot S, Gaudin F, Agostini H, Prévot S, Berrebi D, Ciocan D, Jousse C, Naveau S, Gérard P, Perlemuter G. Intestinal microbiota contributes to individual susceptibility to alcoholic liver disease. Gut 2016; 65:830-9. [PMID: 26642859 DOI: 10.1136/gutjnl-2015-310585] [Citation(s) in RCA: 346] [Impact Index Per Article: 43.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 11/01/2015] [Indexed: 12/17/2022]
Abstract
OBJECTIVE There is substantial inter-individual diversity in the susceptibility of alcoholics to liver injury. Alterations of intestinal microbiota (IM) have been reported in alcoholic liver disease (ALD), but the extent to which they are merely a consequence or a cause is unknown. We aimed to demonstrate that a specific dysbiosis contributes to the development of alcoholic hepatitis (AH). DESIGN We humanised germ-free and conventional mice using human IM transplant from alcoholic patients with or without AH. The consequences on alcohol-fed recipient mice were studied. RESULTS A specific dysbiosis was associated with ALD severity in patients. Mice harbouring the IM from a patient with severe AH (sAH) developed more severe liver inflammation with an increased number of liver T lymphocyte subsets and Natural Killer T (NKT) lymphocytes, higher liver necrosis, greater intestinal permeability and higher translocation of bacteria than mice harbouring the IM from an alcoholic patient without AH (noAH). Similarly, CD45+ lymphocyte subsets were increased in visceral adipose tissue, and CD4(+)T and NKT lymphocytes in mesenteric lymph nodes. The IM associated with sAH and noAH could be distinguished by differences in bacterial abundance and composition. Key deleterious species were associated with sAH while the Faecalibacterium genus was associated with noAH. Ursodeoxycholic acid was more abundant in faeces from noAH mice. Additionally, in conventional mice humanised with the IM from an sAH patient, a second subsequent transfer of IM from an noAH patient improved alcohol-induced liver lesions. CONCLUSIONS Individual susceptibility to ALD is substantially driven by IM. It may, therefore, be possible to prevent and manage ALD by IM manipulation.
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Affiliation(s)
- M Llopis
- INSERM UMR996-Inflammation, Chemokines and Immunopathology, Clamart, France Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, CHU Bicêtre, Kremlin-Bicêtre, France INRA, UMR1319 Micalis, Jouy-en-Josas, France AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - A M Cassard
- INSERM UMR996-Inflammation, Chemokines and Immunopathology, Clamart, France Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, CHU Bicêtre, Kremlin-Bicêtre, France
| | - L Wrzosek
- INSERM UMR996-Inflammation, Chemokines and Immunopathology, Clamart, France Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, CHU Bicêtre, Kremlin-Bicêtre, France
| | - L Boschat
- INRA, UMR1319 Micalis, Jouy-en-Josas, France AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - A Bruneau
- INRA, UMR1319 Micalis, Jouy-en-Josas, France AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - G Ferrere
- INSERM UMR996-Inflammation, Chemokines and Immunopathology, Clamart, France Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, CHU Bicêtre, Kremlin-Bicêtre, France
| | - V Puchois
- INSERM UMR996-Inflammation, Chemokines and Immunopathology, Clamart, France Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, CHU Bicêtre, Kremlin-Bicêtre, France
| | - J C Martin
- Faculté de Médecine, Aix-Marseille University, Marseille, France INSERM, UMR1062 NORT, Marseille, France
| | - P Lepage
- INRA, UMR1319 Micalis, Jouy-en-Josas, France AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - T Le Roy
- INRA, UMR1319 Micalis, Jouy-en-Josas, France AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - L Lefèvre
- INRA, UMR 1313, GABI-LGS Plateforme ICE, Jouy-en-Josas, France
| | - B Langelier
- INRA, UMR1319 Micalis, Jouy-en-Josas, France AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - F Cailleux
- INSERM UMR996-Inflammation, Chemokines and Immunopathology, Clamart, France Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, CHU Bicêtre, Kremlin-Bicêtre, France
| | - A M González-Castro
- Department of Gastroenterology, Digestive System Research Unit, Hospital University Vall d'Hebron and VHIR, UAB, Spain
| | - S Rabot
- INRA, UMR1319 Micalis, Jouy-en-Josas, France AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - F Gaudin
- IPSIT, IFR141, Faculté de Pharmacie, Univ Paris-Sud, Châtenay-Malabry, France
| | - H Agostini
- AP-HP, Hôpital Bicêtre, Unité de recherche clinique Paris-Sud, Kremlin-Bicêtre, France
| | - S Prévot
- Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, CHU Bicêtre, Kremlin-Bicêtre, France AP-HP, Anatomie-pathologique, Hôpital Antoine-Béclère, Clamart, France
| | - D Berrebi
- INSERM UMR996-Inflammation, Chemokines and Immunopathology, Clamart, France AP-HP, Anatomie et de Cytologie Pathologiques, Hôpital Robert Debré, Paris, France
| | - D Ciocan
- INSERM UMR996-Inflammation, Chemokines and Immunopathology, Clamart, France Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, CHU Bicêtre, Kremlin-Bicêtre, France AP-HP, Hepatogastroenterology and Nutrition, Hôpital Antoine-Béclère, Clamart, France
| | - C Jousse
- Université Clermont Auvergne, Institut de Chimie de Clermont-Ferrand UMR CNRS 6296, Clermont-Ferrand, France
| | - S Naveau
- INSERM UMR996-Inflammation, Chemokines and Immunopathology, Clamart, France Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, CHU Bicêtre, Kremlin-Bicêtre, France AP-HP, Hepatogastroenterology and Nutrition, Hôpital Antoine-Béclère, Clamart, France
| | - P Gérard
- INRA, UMR1319 Micalis, Jouy-en-Josas, France AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - G Perlemuter
- INSERM UMR996-Inflammation, Chemokines and Immunopathology, Clamart, France Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, CHU Bicêtre, Kremlin-Bicêtre, France AP-HP, Hepatogastroenterology and Nutrition, Hôpital Antoine-Béclère, Clamart, France
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Bally P, Bruneau A, Ginies C, Kennedy S, Pons N, Le Chatelier E, Martin JC, Gérard P. O64: Régime hyperlipidique et développement de l’obésité : un microbiote de prédisposition ? NUTR CLIN METAB 2014. [DOI: 10.1016/s0985-0562(14)70640-5] [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: 10/24/2022]
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Llopis M, Cassard-Doulcier AM, Boschat L, Bruneau A, Martin JC, Le Roy T, Wrosek L, Rabot S, Berrebi D, Naveau S, Gérard P, Perlemuter G. P183: Le microbiote intestinal détermine la sévérité de la maladie alcoolique du foie. NUTR CLIN METAB 2014. [DOI: 10.1016/s0985-0562(14)70825-8] [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: 11/28/2022]
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Lacaze E, Devaux A, Bruneau A, Bony S, Sherry J, Gagné F. Genotoxic potential of several naphthenic acids and a synthetic oil sands process-affected water in rainbow trout (Oncorhynchus mykiss). Aquat Toxicol 2014; 152:291-299. [PMID: 24799193 DOI: 10.1016/j.aquatox.2014.04.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 04/09/2014] [Accepted: 04/11/2014] [Indexed: 06/03/2023]
Abstract
The exploitation of oil sands has raised major environmental concerns, particularly regarding the presence of high concentration in contaminants such as polycyclic aromatic hydrocarbons (PAHs) and naphthenic acids (NAs) in oil sands process-affected water (OSPW). The purpose of this study was, first to evaluate the genotoxic impact of OSPW-related compounds such as NAs and PAHs in a salmonid species and secondly to assess if OSPW exposure leads to genotoxicity. For this purpose, rainbow trout hepatocytes were exposed in vitro to environmentally relevant concentrations of synthetic NAs, naphtalene, benzo(a)pyrene, and extracts of synthetic OSPW (generated by a laboratory bitumen extraction) and of oil sands leaching water (OSLW, mimicking leaching of oil sands in river water). Primary DNA damage was assessed by the formamidopyrimidine-DNA glycolyase (Fpg)-modified comet assay. Genotoxicity was observed in hepatocytes exposed to several NAs, mixture of them, OSPW and OSLW extracts. The chemical structure of NAs influences the genotoxicity potential: among the NAs tested, the most cyclic NA was the most genotoxic. It also appears that genotoxicity was more marked for OSPW than for OSLW. Because exposure to OSPW led to oxidative DNA damage, while after exposure to several NAs, these types of DNA damage were limited, the NAs tested in this study could not be qualified as the only major contaminants responsible for OSPW genotoxicity. Notwithstanding, it should be noteworthy that exposure to NAs resulted in genotoxic impact at concentrations lower than those documented by literature for fresh OSPW. Further research is needed to explore the relationships between the chemical structure of NAs and their genotoxicity in the light of the distribution of NAs in fresh OSPW samples as well as in surface waters.
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Affiliation(s)
- E Lacaze
- Emerging Methods Section, Environment Canada, 105 McGill St., Montreal, H2Y2E7 Quebec, Canada; INRA, USC IGH, LEHNA UMR 5023, Université de Lyon-ENTPE, F-69518, Vaulx en Velin, France.
| | - A Devaux
- INRA, USC IGH, LEHNA UMR 5023, Université de Lyon-ENTPE, F-69518, Vaulx en Velin, France
| | - A Bruneau
- Emerging Methods Section, Environment Canada, 105 McGill St., Montreal, H2Y2E7 Quebec, Canada
| | - S Bony
- INRA, USC IGH, LEHNA UMR 5023, Université de Lyon-ENTPE, F-69518, Vaulx en Velin, France
| | - J Sherry
- Emerging Methods Section, Environment Canada, 105 McGill St., Montreal, H2Y2E7 Quebec, Canada
| | - F Gagné
- Emerging Methods Section, Environment Canada, 105 McGill St., Montreal, H2Y2E7 Quebec, Canada
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Crumeyrolle-Arias M, Jaglin M, Bruneau A, Vancassel S, Cardona A, Daugé V, Naudon L, Rabot S. Absence of the gut microbiota enhances anxiety-like behavior and neuroendocrine response to acute stress in rats. Psychoneuroendocrinology 2014; 42:207-17. [PMID: 24636517 DOI: 10.1016/j.psyneuen.2014.01.014] [Citation(s) in RCA: 361] [Impact Index Per Article: 36.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 01/16/2014] [Accepted: 01/22/2014] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS Establishment of the gut microbiota is one of the most important events in early life and emerging evidence indicates that the gut microbiota influences several aspects of brain functioning, including reactivity to stress. To better understand how the gut microbiota contributes to a vulnerability to the stress-related psychiatric disorders, we investigated the relationship between the gut microbiota, anxiety-like behavior and HPA axis activity in stress-sensitive rodents. We also analyzed the monoamine neurotransmitters in the brain upper structures involved in the regulation of stress and anxiety. METHODS Germfree (GF) and specific pathogen free (SPF) F344 male rats were first subjected to neurological tests to rule out sensorimotor impairments as confounding factors. Then, we examined the behavior responses of rats to social interaction and open-field tests. Serum corticosterone concentrations, CRF mRNA expression levels in the hypothalamus, glucocorticoid receptor (GR) mRNA expression levels in the hippocampus, and monoamine concentrations in the frontal cortex, hippocampus and striatum were compared in rats that were either exposed to the open-field stress or not. RESULTS GF rats spent less time sniffing an unknown partner than SPF rats in the social interaction test, and displayed a lower number of visits to the aversive central area, and an increase in latency time, time spent in the corners and number of defecations in the open-field test. In response to the open-field stress, serum corticosterone concentrations were 2.8-fold higher in GF than in SPF rats. Compared to that of SPF rats, GF rats showed elevated CRF mRNA expression in the hypothalamus and reduced GR mRNA expression in the hippocampus. GF rats also had a lower dopaminergic turnover rate in the frontal cortex, hippocampus and striatum than SPF rats. CONCLUSIONS In stress-sensitive F344 rats, absence of the gut microbiota exacerbates the neuroendocrine and behavioral responses to acute stress and the results coexist with alterations of the dopaminergic turnover rate in brain upper structures that are known to regulate reactivity to stress and anxiety-like behavior.
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Affiliation(s)
- Michèle Crumeyrolle-Arias
- INSERM, UMRS952 Physiopathologie des Maladies du Système Nerveux Central, F-75005 Paris, France; CNRS, UMR7224 Physiopathologie des Maladies du Système Nerveux Central, F-75005 Paris, France; UPMC, Physiopathologie des Maladies du Système Nerveux Central, F-75005 Paris, France
| | - Mathilde Jaglin
- INRA, UMR1319 Micalis, F-78350 Jouy-en-Josas, France; AgroParisTech, Micalis, F-78350 Jouy-en-Josas, France
| | - Aurélia Bruneau
- INRA, UMR1319 Micalis, F-78350 Jouy-en-Josas, France; AgroParisTech, Micalis, F-78350 Jouy-en-Josas, France
| | | | - Ana Cardona
- Institut Pasteur, Plateforme Imagerie Dynamique, Paris, France
| | - Valérie Daugé
- INSERM, UMRS952 Physiopathologie des Maladies du Système Nerveux Central, F-75005 Paris, France; CNRS, UMR7224 Physiopathologie des Maladies du Système Nerveux Central, F-75005 Paris, France; UPMC, Physiopathologie des Maladies du Système Nerveux Central, F-75005 Paris, France; CNRS, Micalis, F-78350 Jouy-en-Josas, France
| | - Laurent Naudon
- INSERM, UMRS952 Physiopathologie des Maladies du Système Nerveux Central, F-75005 Paris, France; CNRS, UMR7224 Physiopathologie des Maladies du Système Nerveux Central, F-75005 Paris, France; UPMC, Physiopathologie des Maladies du Système Nerveux Central, F-75005 Paris, France; CNRS, Micalis, F-78350 Jouy-en-Josas, France
| | - Sylvie Rabot
- INRA, UMR1319 Micalis, F-78350 Jouy-en-Josas, France; AgroParisTech, Micalis, F-78350 Jouy-en-Josas, France.
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Lacaze E, Devaux A, Bony S, Bruneau A, André C, Pelletier M, Gagné F. Genotoxic impact of a municipal effluent dispersion plume in the freshwater mussel Elliptio complanata: an in situ study. J Xenobiot 2013. [DOI: 10.4081/xeno.2013.s1.e6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Not available
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Le Roy T, Llopis M, Lepage P, Bruneau A, Rabot S, Bevilacqua C, Martin P, Philippe C, Walker F, Bado A, Perlemuter G, Cassard-Doulcier AM, Gérard P. Intestinal microbiota determines development of non-alcoholic fatty liver disease in mice. Gut 2013. [PMID: 23197411 DOI: 10.1136/gutjnl-2012-303816] [Citation(s) in RCA: 622] [Impact Index Per Article: 56.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Non-alcoholic fatty liver disease (NAFLD) is prevalent among obese people and is considered the hepatic manifestation of metabolic syndrome. However, not all obese individuals develop NAFLD. Our objective was to demonstrate the role of the gut microbiota in NAFLD development using transplantation experiments in mice. DESIGN Two donor C57BL/6J mice were selected on the basis of their responses to a high-fat diet (HFD). Although both mice displayed similar body weight gain, one mouse, called the 'responder', developed hyperglycaemia and had a high plasma concentration of pro-inflammatory cytokines. The other, called a 'non-responder', was normoglycaemic and had a lower level of systemic inflammation. Germ-free mice were colonised with intestinal microbiota from either the responder or the non-responder and then fed the same HFD. RESULTS Mice that received microbiota from different donors developed comparable obesity on the HFD. The responder-receiver (RR) group developed fasting hyperglycaemia and insulinaemia, whereas the non-responder-receiver (NRR) group remained normoglycaemic. In contrast to NRR mice, RR mice developed hepatic macrovesicular steatosis, which was confirmed by a higher liver concentration of triglycerides and increased expression of genes involved in de-novo lipogenesis. Pyrosequencing of the 16S ribosomal RNA genes revealed that RR and NRR mice had distinct gut microbiota including differences at the phylum, genera and species levels. CONCLUSIONS Differences in microbiota composition can determine response to a HFD in mice. These results further demonstrate that the gut microbiota contributes to the development of NAFLD independently of obesity.
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Respondek F, Gerard P, Bossis M, Boschat L, Bruneau A, Rabot S, Wagner A, Martin JC. Short-chain fructo-oligosaccharides modulate intestinal microbiota and metabolic parameters of humanized gnotobiotic diet induced obesity mice. PLoS One 2013; 8:e71026. [PMID: 23951074 PMCID: PMC3741321 DOI: 10.1371/journal.pone.0071026] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Accepted: 07/01/2013] [Indexed: 12/19/2022] Open
Abstract
Prebiotic fibres like short-chain fructo-oligosaccharides (scFOS) are known to selectively modulate the composition of the intestinal microbiota and especially to stimulate Bifidobacteria. In parallel, the involvement of intestinal microbiota in host metabolic regulation has been recently highlighted. The objective of the study was to evaluate the effect of scFOS on the composition of the faecal microbiota and on metabolic parameters in an animal model of diet-induced obesity harbouring a human-type microbiota. Forty eight axenic C57BL/6J mice were inoculated with a sample of faecal human microbiota and randomly assigned to one of 3 diets for 7 weeks: a control diet, a high fat diet (HF, 60% of energy derived from fat)) or an isocaloric HF diet containing 10% of scFOS (HF-scFOS). Mice fed with the two HF gained at least 21% more weight than mice from the control group. Addition of scFOS partially abolished the deposition of fat mass but significantly increased the weight of the caecum. The analysis of the taxonomic composition of the faecal microbiota by FISH technique revealed that the addition of scFOS induced a significant increase of faecal Bifidobacteria and the Clostridium coccoides group whereas it decreased the Clostridium leptum group. In addition to modifying the composition of the faecal microbiota, scFOS most prominently affected the faecal metabolome (e.g. bile acids derivatives, hydroxyl monoenoic fatty acids) as well as urine, plasma hydrophilic and plasma lipid metabolomes. The increase in C. coccoides and the decrease in C. leptum, were highly correlated to these metabolic changes, including insulinaemia, as well as to the weight of the caecum (empty and full) but not the increase in Bifidobacteria. In conclusion scFOS induce profound metabolic changes by modulating the composition and the activity of the intestinal microbiota, that may partly explain their effect on the reduction of insulinaemia.
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Bruneau A, Fortier M, Gagne F, Gagnon C, Turcotte P, Tayabali A, Davis TL, Auffret M, Fournier M. Size distribution effects of cadmium tellurium quantum dots (CdS/CdTe) immunotoxicity on aquatic organisms. Environ Sci Process Impacts 2013; 15:596-607. [PMID: 23738358 DOI: 10.1039/c2em30896g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The increasing use of products derived from nanotechnology has raised concern about their potential toxicity to aquatic life. This study sought to examine the comparative immunotoxicity of capped cadmium sulphide/cadmium telluride (CdS/CdTe) quantum dots (QDs) and possible impact of particle/aggregate size on two bivalves (Mytilus edulis and Elliptio complanata) and a fish (Oncorhynchus mykiss). The QDs were dispersed in sterile water and fractionated using a series of micro/ultrafiltration membranes of decreasing pore size: 450 nm, 100 nm, 50 nm, 25 nm, 100 kDa (6.8 nm), 30 kDa (4.6 nm), 10 kDa (3.2 nm) and 1 kDa (1.5 nm). The total concentrations of cadmium and tellurium were determined for the filtered material and for that retained on the filters (retentate). The immunotoxicity was determined by measuring cell viability and phagocytosis. Results revealed that nanoparticles retained on the ultrafilters had a higher Cd/Te ratio compared to the permeate fraction (ratio of 5 and 2 respectively) which could indicate that the CdS core was not associated with the permeable fraction of Cd. Our results demonstrate that the toxicity of CdS/CdTe QDs was concentration and size dependent. Large CdS/CdTe QD aggregates (25 nm < size < 100 nm) reduced phagocytosis more than did smaller nanoparticles (<25 nm). Moreover, our results revealed that the different species responded differently to these fractions. Mytilus edulis hemocytes were less sensitive to CdS/CdTe QDs than the Oncorhynchus mykiss macrophage and Elliptio complanata hemocytes.
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Affiliation(s)
- A Bruneau
- INRS-Institut Armand-Frappier, 531 Boulevard des Prairies, Laval, Quebec, Canada H7V 1B7.
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Mahe G, Abraham P, Le Faucheur A, Bruneau A, Humeau-Heurtier A, Durand S. Cutaneous microvascular functional assessment during exercise: a novel approach using laser speckle contrast imaging. Pflugers Arch 2013; 465:451-8. [PMID: 23328863 DOI: 10.1007/s00424-012-1215-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Accepted: 12/31/2012] [Indexed: 10/27/2022]
Abstract
Cardiovascular diseases are often revealed during exercise and are associated with cutaneous blood flow (CBF) dysfunction. Studies of CBF during exercise are consequently of interest. Laser speckle contrast imaging (LSCI) allows for non-contact and real-time recording of CBF at rest. We tested whether LSCI could allow the study of CBF during a cycling exercise using a specific signal treatment procedure that removes movement-induced artefacts from the LSCI raw signal. We recorded the baseline CBF and peak post-occlusive reactive hyperaemia (PORH) from the cutaneous forearm using LSCI and the mean blood pressure before and during cycling (80 W at 70 rpm) in nine healthy subjects. We determined the cross-correlation coefficient r between LSCI traces obtained before and during cycling and before and after a specifically designed signal processing technique. The results are presented as the median (25th-75th centile) and expressed as the cutaneous vascular conductance (laser speckle perfusion units (LSPU) per millimetre of mercury). Cross-correlation r increased from 0.226 ± 0.140 before to 0.683 ± 0.170 after post-processing. After signal processing, the peak PORH during exercise was reduced [0.38 (0.30-0.52) LSPU/mmHg] compared with the peak PORH during the non-exercise phase [0.69 (0.63-0.74) LSPU/mmHg, p < 0.01], whereas no difference was found between the baseline values. With adequate signal processing, LSCI appears valuable for investigating CBF during exercise. During constant-load lower limb cycling exercise, the upper limb peak PORH is reduced compared with the peak PORH during non-exercise. The underlying mechanisms warrant further investigations in both healthy (trained) subjects and diseased (e.g., coronary heart disease) patients.
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Affiliation(s)
- G Mahe
- Laboratory of Vascular Investigations, University Hospital of Angers, Angers, France.
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Gagné F, Auclair J, Fortier M, Bruneau A, Fournier M, Turcotte P, Pilote M, Gagnon C. Bioavailability and immunotoxicity of silver nanoparticles to the freshwater mussel Elliptio complanata. J Toxicol Environ Health A 2013; 76:767-77. [PMID: 24028663 DOI: 10.1080/15287394.2013.818602] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The purpose of this study was to examine the effects of Ag nanoparticles (nAg) of two different sizes (20 and 80 nm) and Ag(+) on the immune system of the freshwater mussel Elliptio complanata. Mussels were exposed to increasing concentrations of nAg and dissolved Ag (AgNO3) for 48 h at 15°C and concentration of 0, 0.8, 4, or 20 μg/L. Immunocompetence was determined by hemocyte viability, phagocytosis, and cell cytotoxicity. Ag tissue loadings and levels of metallothioneins (MT), lipid peroxidation (LPO), and labile zinc (Zn) were also determined. Results revealed first that 20- and 80-nm nAg readily formed aggregates in freshwater. Ag was detected in soft tissues with each form of Ag with bioconcentration factors of 20, 9, and 7 for Ag(+), 20-nm nAg, and 80-nm nAg, respectively. Significant induction in phagocytosis and decreased cell cytotoxicity were observed. All forms of Ag were able to induce LPO in gills and digestive glands at concentrations below those from the initial fraction of dissolved Ag. The effects of nAg on MT levels in mussels were not discernible from those of dissolved Ag, but the 80-nm was 25-fold more potent than 20-nm nAg in inducing MT. Multivariate analysis revealed that the global responses of the 20- and 80-nm nAg were generally similar to those of dissolved Ag. Data also demonstrated that nAg are bioavailable for mussels where the immune system is a target during early exposure to nanoparticles.
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Affiliation(s)
- F Gagné
- a Emerging Methods Section, Aquatic Contaminants Research Division , Water Science and Technology Directorate, Environment Canada , Montréal , Quebec , Canada
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Respondek F, Bossis M, Boschat L, Bruneau A, Rabot S, Wagner A, Gérard P, Martin JC. O36 Les FOS modulent la flore intestinale et les paramètres métaboliques chez la souris à flore humaine. NUTR CLIN METAB 2011. [DOI: 10.1016/s0985-0562(11)70040-1] [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: 11/15/2022]
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Van den Abbeele P, Gérard P, Rabot S, Bruneau A, El Aidy S, Derrien M, Kleerebezem M, Zoetendal EG, Smidt H, Verstraete W, Van de Wiele T, Possemiers S. Arabinoxylans and inulin differentially modulate the mucosal and luminal gut microbiota and mucin-degradation in humanized rats. Environ Microbiol 2011; 13:2667-80. [PMID: 21883787 DOI: 10.1111/j.1462-2920.2011.02533.x] [Citation(s) in RCA: 188] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The endogenous gut microbiota affects the host in many ways. Prebiotics should favour beneficial intestinal microbes and thus improve host health. In this study, we investigated how a novel class of potential prebiotic long-chain arabinoxylans (LC-AX) and the well-established prebiotic inulin (IN) modulate the gut microbiota of humanized rats. Six weeks after axenic rats were inoculated with a human faecal microbiota, their colonic microbiota was similar to this inoculum (∼ 70%), whereas their caecal microbiota was enriched with Verrucomicrobia and Firmicutes concomitant with lower abundance of Bacteroidetes. Moreover, different Bifidobacterium species colonized the lumen (B. adolescentis) and mucus (B. longum and B. bifidum). Both LC-AX and IN increased SCFA levels and induced a shift from acetate towards health-promoting propionate and butyrate respectively. By applying a high-resolution phylogenetic micro-array (HITChip) at the site of fermentation (caecum), IN and LC-AX were shown to stimulate bacterial groups with known butyrate-producers (Roseburia intestinalis, Eubacterium rectale, Anaerostipes caccae) and bifidobacteria (B. longum) respectively. Prebiotic administration also resulted in lower caecal abundances of the mucin-degrading Akkermansia muciniphila and potentially more mucin production by the host. Both factors might explain the increased caecal mucin levels for LC-AX (threefold) and IN (sixfold). These mucins were degraded along the colon, resulting in high faecal abundances of Akkermansia muciniphila for LC-AX and especially IN-treated rats. Finally, the microbial changes caused an adaptation period for the host with less weight gain, after which the host fine-tuned the interaction with this altered microbiota. Our results demonstrate that next to IN, LC-AX are promising prebiotic compounds by stimulating production of health-promoting metabolites by specific microbes in the proximal regions. Further, prebiotic supplementation shifted mucin degradation to distal regions, where mucin-degraders may produce beneficial metabolites (e.g. propionate by Akkermansia muciniphila), so that prebiotics may potentially improve gut health along the entire length of the intestine.
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Affiliation(s)
- Pieter Van den Abbeele
- Laboratory of Microbial Ecology and Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium
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Rabot S, Membrez M, Bruneau A, Gérard P, Harach T, Moser M, Raymond F, Mansourian R, Chou CJ. Germ-free C57BL/6J mice are resistant to high-fat-diet-induced insulin resistance and have altered cholesterol metabolism. FASEB J 2010; 24:4948-59. [DOI: 10.1096/fj.10-164921] [Citation(s) in RCA: 382] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Sylvie Rabot
- Institut National de la Recherche Agronomique, UMR1319 Micalis, Jouy-en-Josas, France; and
| | | | - Aurélia Bruneau
- Institut National de la Recherche Agronomique, UMR1319 Micalis, Jouy-en-Josas, France; and
| | - Philippe Gérard
- Institut National de la Recherche Agronomique, UMR1319 Micalis, Jouy-en-Josas, France; and
| | | | - Mireille Moser
- Department of Bioanalytical Science, Nestlé Research Center, Lausanne, Switzerland
| | - Frederic Raymond
- Department of Bioanalytical Science, Nestlé Research Center, Lausanne, Switzerland
| | - Robert Mansourian
- Department of Bioanalytical Science, Nestlé Research Center, Lausanne, Switzerland
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Rabot S, Membrez M, Bruneau A, Gérard P, Harach T, Moser M, Raymond F, Mansourian R, Chou CJ. Germ‐free C57BL/6J mice are resistant to high‐fat‐diet‐induced insulin resistance and have altered cholesterol metabolism. FASEB J 2010. [DOI: 10.1096/fj.10.164921] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sylvie Rabot
- Institut National de la Recherche Agronomique, UMR1319 Micalis Jouy-en-Josas France
| | - Mathieu Membrez
- Department of Nutrition and HealthNestlé Research Center Lausanne Switzerland
| | - Aurélia Bruneau
- Institut National de la Recherche Agronomique, UMR1319 Micalis Jouy-en-Josas France
| | - Philippe Gérard
- Institut National de la Recherche Agronomique, UMR1319 Micalis Jouy-en-Josas France
| | - Taoufiq Harach
- Department of Nutrition and HealthNestlé Research Center Lausanne Switzerland
| | - Mireille Moser
- Department of Bioanalytical ScienceNestlé Research Center Lausanne Switzerland
| | - Frederic Raymond
- Department of Bioanalytical ScienceNestlé Research Center Lausanne Switzerland
| | - Robert Mansourian
- Department of Bioanalytical ScienceNestlé Research Center Lausanne Switzerland
| | - Chieh J. Chou
- Department of Nutrition and HealthNestlé Research Center Lausanne Switzerland
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Cherbuy C, Honvo-Houeto E, Bruneau A, Bridonneau C, Mayeur C, Duée PH, Langella P, Thomas M. Microbiota matures colonic epithelium through a coordinated induction of cell cycle-related proteins in gnotobiotic rat. Am J Physiol Gastrointest Liver Physiol 2010; 299:G348-57. [PMID: 20466941 DOI: 10.1152/ajpgi.00384.2009] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Previous studies have suggested that intestinal microbiota modulates colonic epithelium renewal. The objective of our work was to study the effects of microbiota on colonic epithelium structure and cell cycle-related proteins by using gnotobiotic rats. Colonic crypts and amount of cell cycle-related proteins were compared between germ-free (GF), conventional (CV), and conventionalized rats by histochemistry and Western blot. Ki67 and proliferating cell nuclear antigen (PCNA) were used as surrogates for proliferative cells; p21(cip1) and p27(kip1) were markers of cell cycle arrest; anti- and proapoptotic proteins, Bcl2 and Bax, respectively, were also studied. We observed 40% increase of the crypt proliferative area 2 days after inoculation of GF rats with a complex microbiota. This recruitment of proliferative cells may account for the 30% increase of crypt depth observed between CV and GF rats. The hyperproliferative boost induced by microbiota was compensated by a fourfold increase of p21(cip1) and p27(kip1) involved in cell cycle arrest and a 30% drop of antiapoptotic Bcl2 protein while Bax was unchanged. Inductions of p21(cip1), p27(kip1), and PCNA protein were not paralleled by an increase of the corresponding mRNA. We also showed that p21(cip1) induction by microbiota was partially restored by Bacteroides thetaiotaomicron, Ruminococcus gnavus, and Clostridium paraputrificum. Colonization of the colon by a complex microbiota increases the crypt depth of colon epithelium. This event takes place in conjunction with a multistep process: a hyperproliferative boost accompanied by compensatory events as induction of p21(cip1) and p27(kip1) and decrease of Bcl2.
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Affiliation(s)
- Claire Cherbuy
- Institut National de la Recherche Agronomique, MICALIS, UMR, Pôle Ecosystèmes, Jouy-en-Josas, France.
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Dinomais M, Gambart G, Bruneau A, Bontoux L, Deries X, Tessiot C, Richard I. Social functioning and self-esteem in young people with disabilities participating in adapted competitive sport. Neuropediatrics 2010; 41:49-54. [PMID: 20799149 DOI: 10.1055/s-0030-1255118] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AIMS The aim of this study was to investigate social functioning quality of life and self-esteem in young people with disabilities taking part in adapted competitive sport. METHOD A sample of 496 athletes (mean age 16 years 4 months, range: 9 years to 20 years 9 months) was obtained from the 540 participants (91.8%) involved in a French national championship. The main outcome measurements were a social functioning inventory (PedsQL 4.0 social functioning) and a self-esteem inventory in physical areas (physical self inventory 6 PSI-6). RESULTS The mean PedsQL SF score was 74.6 (SD: 17.7). Comparisons of PedsQL SF according to gender, age, self mobility and training revealed no significant differences between the groups. PedsQL SF was weakly but significantly correlated with all subscales of the PSI-6 in the total population. PSI-6 scores were significantly different between boys and girls, with better self-esteem for boys on general self-esteem (7.7 vs. 6.9, P=0.018), physical condition (6.8 vs. 6.0, P=0.023) and attractive body subscores (6.5 vs. 5.1, P<0.001). CONCLUSION Social functioning scores were significantly higher in this population than in the samples of young people with disabilities available in the literature. Interactions between self-concept, social functioning quality of life and participation in adapted sport activities require further studies.
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Affiliation(s)
- M Dinomais
- Department of Pediatric Rehabilitation, Rehabilitation Center "les capucins", Angers, France.
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Joly F, Mayeur C, Bruneau A, Noordine ML, Meylheuc T, Langella P, Messing B, Duée PH, Cherbuy C, Thomas M. Drastic changes in fecal and mucosa-associated microbiota in adult patients with short bowel syndrome. Biochimie 2010; 92:753-61. [DOI: 10.1016/j.biochi.2010.02.015] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2010] [Accepted: 02/12/2010] [Indexed: 01/07/2023]
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Lhoste EF, Bruneau A, Bensaada M, Cherbuy C, Philippe C, Bruel S, Sutren M, Rabot S, Guyot S, Duée PH, Latino-Martel P. Apple proanthocyanidins do not reduce the induction of preneoplastic lesions in the colon of rats associated with human microbiota. J Agric Food Chem 2010; 58:4120-4125. [PMID: 20205389 DOI: 10.1021/jf904010a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Since the gut microbiota metabolizes various dietary constituents unabsorbed by the small intestine and modulates colon function, it plays an essential role in colon carcinogenesis. First, we have developed a model of human microbiota-associated rats (HMA), fed a human-type diet and injected with 1-2,dimethylhydrazine (DMH). We observed that the number and size of DMH-induced aberrant crypt foci (ACF) were significantly higher in HMA rats than in germ-free or conventional rats. Second, we used this model to assess the protective effect of an apple proanthocyanidin-rich extract (APE) on colon carcinogenesis. In this model, ACF number and multiplicity were not reduced by APE at 0.001% and 0.01% in drinking water. They were higher with APE 0.1% than with APE 0.01%. Therefore, the cross-talk between human microbiota and the colon epithelium should be taken into account in carcinogenesis models. Moreover, attention should be paid prior to using proanthocyanidin extracts as dietary supplements for humans.
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Affiliation(s)
- Evelyne F Lhoste
- INRA, UR910 Unite d'Ecologie et Physiologie du Systeme Digestif, Institut National de la Recherche Agronomique (INRA), Jouy-en-Josas, France
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Bruneau A. Gravité du traumatisme et souffrance psychosociale chez le sportif aux urgences. Sci Sports 2009. [DOI: 10.1016/j.scispo.2009.01.009] [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: 11/25/2022]
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Possemiers S, Rabot S, Espín JC, Bruneau A, Philippe C, González-Sarrías A, Heyerick A, Tomás-Barberán FA, De Keukeleire D, Verstraete W. Eubacterium limosum activates isoxanthohumol from hops (Humulus lupulus L.) into the potent phytoestrogen 8-prenylnaringenin in vitro and in rat intestine. J Nutr 2008; 138:1310-6. [PMID: 18567753 DOI: 10.1093/jn/138.7.1310] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Recently, it was shown that the exposure to the potent hop phytoestrogen 8-prenylnaringenin (8-PN) depends on intestinal bacterial activation of isoxanthohumol (IX), but this occurs in only one-third of tested individuals. As the butyrate-producing Eubacterium limosum can produce 8-PN from IX, a probiotic strategy was applied to investigate whether 8-PN production could be increased in low 8-PN producers, thus balancing phytoestrogen exposure. Using fecal samples from high (Hop +) and low (Hop -) 8-PN-producing individuals, a Hop + and Hop - dynamic intestinal model was developed. In parallel, Hop + and Hop - human microbiota-associated rats were developed, germ-free (GF) rats acting as negative controls. IX and then IX + E. limosum were administered in the intestinal model and to the rats, and changes in 8-PN production and exposure were assessed. After dosing IX, 80% was converted into 8-PN in the Hop + model and highest 8-PN production, plasma concentrations, and urinary and fecal excretion occurred in the Hop + rats. Administration of the bacterium triggered 8-PN production in the GF rats and increased 8-PN production in the Hop - model and Hop - rats. 8-PN excretion was similar in the feces (294.1 +/- 132.2 nmol/d) and urine (8.5 +/- 1.1 nmol/d ) of all rats (n = 18). In addition, butyrate production increased in all rats. In conclusion, intestinal microbiota determined 8-PN production and exposure after IX intake. Moreover, E. limosum administration increased 8-PN production in low producers, resulting in similar 8-PN production in all rats.
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Affiliation(s)
- Sam Possemiers
- Laboratory of Microbial Ecology and Technology, Faculty of Bioscience Engineering, Ghent University, B-9000 Gent, Belgium
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Lan A, Bruneau A, Philippe C, Rochet V, Rouault A, Hervé C, Roland N, Rabot S, Jan G. Survival and metabolic activity of selected strains of Propionibacterium freudenreichii in the gastrointestinal tract of human microbiota-associated rats. Br J Nutr 2007; 97:714-24. [PMID: 17349084 DOI: 10.1017/s0007114507433001] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
In addition to their use in cheese technology, dairy propionibacteria have been identified as potential probiotics. However, to have a probiotic effect, propionibacteria have to survive and to remain metabolically active in the digestive tract. The aim of the present study was to investigate the survival and metabolic activity of Propionibacterium freudenreichii within the gastrointestinal tract of human microbiota-associated rats, and its influence on intestinal microbiota composition and metabolism. Twenty-five dairy Propionibacterium strains were screened for their tolerance towards digestive stresses and their ability to produce propionate in a medium mimicking the content of the human colon. Three strains were selected and a daily dose of 2 x 10(10) colony-forming units was fed to groups of human microbiota-associated rats for 20 d before microbiological, biochemical and molecular investigations being carried out. These strains all reached 8-log values per g faeces, showing their ability to survive in the gastrointestinal tract. Transcriptional activity within the intestine was demonstrated by the presence of P. freudenreichii-specific transcarboxylase mRNA. The probiotic efficacy of propionibacteria was yet species- and strain-dependent. Indeed, two of the strains, namely TL133 and TL1348, altered the faecal microbiota composition, TL133 also increasing the caecal concentration of acetate, propionate and butyrate, while the third strain, TL3, did not have similar effects. Such alterations may have an impact on gut health and will thus be taken into consideration for further in vivo investigations on probiotic potentialities of P. freudenreichii.
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Affiliation(s)
- Annaïg Lan
- INRA, Agrocampus Rennes, UMR1253, Science et Technologie du Lait et de I'Oeuf, F-35000 Rennes, France.
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Humblot C, Bruneau A, Sutren M, Lhoste EF, Doré J, Andrieux C, Rabot S. Brussels sprouts, inulin and fermented milk alter the faecal microbiota of human microbiota-associated rats as shown by PCR-temporal temperature gradient gel electrophoresis using universal,Lactobacillus and Bifidobacterium16S rRNA gene primers. Br J Nutr 2007; 93:677-84. [PMID: 15975167 DOI: 10.1079/bjn20051372] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We investigated the effect of Brussels sprouts, inulin and a fermented milk on the faecal microbiota diversity of human microbiota-associated (HMA) rats by PCR-temporal temperature gradient gel electrophoresis (PCR-TTGE) using universal and group-specific 16S rRNA gene primers. The HMA rats were submitted to a control diet for 10 d (initial time), then switched to the experimental diets for 4 weeks (final time). Using universal primers, the mean degree of similarity between all faecal samples at initial time was 80·8 %. In the group consuming the control diet throughout the experiment, the mean degree of similarity between the PCR-TTGE profiles at initialv.final time was 76·8 %, reflecting a spontaneous temporal variation. The mean degree of similarity between control and experimental groups at final time was lower, 72·4 %, 74·4 % and 75·6 % for inulin, Brussels sprouts and fermented milk, respectively, indicating a dietary effect on the predominant populations. Using specific primers, bifidobacteria could be detected only in those rats that had consumed inulin, showing a specific increasing effect of this dietary compound. TheLactobacilluspopulation was very heterogeneous at initial time but tended to homogenize within each dietary group. At final time, caecal contents were collected for analysis of SCFA and β-glucuronidase activity. Inulin and Brussels sprouts increased the butyrate and acetate proportion, respectively, while the fermented milk did not modify the caecal biochemistry. This experiment shows for the first time that cruciferous vegetables are able to alter the diversity and the metabolic activities of the digestive microbiota in HMA rats.
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Affiliation(s)
- Christèle Humblot
- National Institute for Agronomic Research (INRA), Unit on Ecology and Physiology of the Digestive Tract (UEPSD), 78352 Jouy-en-Josas Cedex, France
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Druesne-Pecollo N, Chaumontet C, Pagniez A, Vaugelade P, Bruneau A, Thomas M, Cherbuy C, Duée PH, Martel P. In vivo treatment by diallyl disulfide increases histone acetylation in rat colonocytes. Biochem Biophys Res Commun 2007; 354:140-7. [PMID: 17210128 DOI: 10.1016/j.bbrc.2006.12.158] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2007] [Accepted: 12/21/2006] [Indexed: 01/19/2023]
Abstract
Diallyl disulfide (DADS) is an organosulfur compound from garlic which exhibits various anticarcinogenic properties including inhibition of tumor cell proliferation. DADS antiproliferative effects were previously associated with an increase in histone acetylation in two human tumor colon cell lines, suggesting that DADS-induced histone hyperacetylation could be one of the mechanisms involved in its protective properties on colon carcinogenesis. The effects of DADS on histone H4 and H3 acetylation levels were investigated in vivo in colonocytes isolated from non-tumoral rat. Administrated by intracaecal perfusion or gavage, DADS increases histone H4 and H3 acetylation in colonocytes. Moreover, data generated using cDNA expression arrays suggest that DADS could modulate the expression of a subset of genes. These results suggest the involvement of histone acetylation in modulation of gene expression by DADS in normal rat colonocytes, which might play a role in its biological effects as well as in its anticarcinogenic properties in vivo.
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Affiliation(s)
- Nathalie Druesne-Pecollo
- Laboratoire de Nutrition et Sécurité Alimentaire, INRA, Domaine de Vilvert, 78352 Jouy-en-Josas cedex, France.
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Lardy H, Thomas M, Noordine ML, Bruneau A, Cherbuy C, Vaugelade P, Philippe C, Colomb V, Duee PH. Changes induced in colonocytes by extensive intestinal resection in rats. Dig Dis Sci 2006; 51:326-32. [PMID: 16534676 DOI: 10.1007/s10620-006-3133-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2005] [Accepted: 06/15/2005] [Indexed: 12/23/2022]
Abstract
After massive intestinal resection, physiological compensatory events occur in the remnant small bowel and in the colon. The aim of our work was to study the propensity of the colon to evolve after a massive small bowel resection in rats. The resected group, where 80% of the small bowel length was removed, was compared with sham-operated rats (transected). During the 7 postoperative days, rats were fed orally or they received an elemental nutrition through a gastric catheter. PepT1 and NHE3 mRNAs encoding apical membrane transporters were not modified in the present experiment. However, two unexpected genes (I-FABP and UroR) were up-regulated in the colon following intestinal resection. These modifications occurred without an imbalance of cell cycle protein content and in a context of low short-chain fatty acid production.
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Affiliation(s)
- Hubert Lardy
- Laboratoire de Nutrition et de sécurité alimentaire, INRA, Doaine de Vilvert, 78350, Jouy en Josas, France
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Humblot C, Lhoste E, Knasmüller S, Gloux K, Bruneau A, Bensaada M, Durao J, Rabot S, Andrieux C, Kassie F. Protective effects of Brussels sprouts, oligosaccharides and fermented milk towards 2-amino-3-methylimidazo[4,5-f]quinoline (IQ)-induced genotoxicity in the human flora associated F344 rat: role of xenobiotic metabolising enzymes and intestinal microflora. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 802:231-7. [PMID: 15036016 DOI: 10.1016/j.jchromb.2003.11.018] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We investigated the chemoprotective effects of four common constituents of the human diet, i.e. a fermented milk, inulin, oligofructose and Brussels sprouts, towards 2-amino-3-methylimidazo[4,5-f]quinoline (IQ)-induced genotoxicity in male Fischer 344 rats harbouring a human intestinal microflora. We found that the four dietary components significantly reduced IQ-induced DNA damage in hepatocytes (reduction ranged from 74% with inulin to 39% with Brussels sprouts) and colonocytes (reduction ranged from 68% with inulin to 56% with Brussels sprouts). This chemoprotective effect correlated with the induction of hepatic UDP-glucuronosyl transferase following Brussels sprouts consumption, and with alterations of bacterial metabolism in the distal gut (acidification, increase of butyrate proportion, decrease of beta-glucuronidase activity) following inulin consumption.
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Affiliation(s)
- Christèle Humblot
- Institut National de la Recherche Agronomique, Unité d'Ecologie et de Physiologie du Système Digestif, Bâtiment Jacques Poly, 78352 Jouy-en-Josas, France
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Bruneau A, Rodrigue H, Ismäel J, Dion R, Allard R. Outbreak of E. coli O157:H7 associated with bathing at a public beach in the Montreal-Centre region. Can Commun Dis Rep 2004; 30:133-6. [PMID: 15315240] [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: 04/30/2023]
Affiliation(s)
- A Bruneau
- Infectious Diseases Unit, Montreal-Centre Public Health Department, Quebec
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Kassie F, Lhoste EF, Bruneau A, Zsivkovits M, Ferk F, Uhl M, Zidek T, Knasmüller S. Effect of intestinal microfloras from vegetarians and meat eaters on the genotoxicity of 2-amino-3-methylimidazo[4,5-f]quinoline, a carcinogenic heterocyclic amine. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 802:211-5. [PMID: 15036013 DOI: 10.1016/j.jchromb.2003.10.045] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [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: 01/23/2023]
Abstract
Aim of this study was to investigate the impact of intestinal microfloras from vegetarians and non-vegetarians on the DNA-damaging activity of 2-amino-3-methyl-3H-imidazo[4,5-f]quinoline (IQ), a carcinogenic heterocyclic amine that is found in fried meats. Floras from four vegetarians (Seventh Day Adventists) and from four individuals who consumed high amounts of meats were collected and inoculated into germfree F344 rats. The rats were kept on isocaloric diets that either contained animal derived protein and fat (meat consumers group) or proteins and fat of plant origin (vegetarian groups). IQ (90 mg/kg bw) was administered orally, after 4 h the extent of DNA-damage in colon and liver cells was determined in single cell gel electrophoresis assays. In all groups, the IQ induced DNA-migration was in the liver substantially higher than in the colon. In animals harbouring floras of vegetarians, the extent of damage was in both organs significantly (69.2% in the liver, P<0.016 and 64.7%, P<0.042 in the colon, respectively) lower than in the meat consumer groups. Our findings show that diet related differences in the microfloras have a strong impact on the genotoxic effects of IQ and suggest that heterocyclic amines are less genotoxic and carcinogenic in individuals that consume mainly plant derived foods.
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Affiliation(s)
- F Kassie
- Institute of Cancer Research, University of Vienna, Borschkegasse 8A A-1090 Vienna, Austria
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Affiliation(s)
- A Bruneau
- Département de Santé Publique, Ecole Nationale Vétérinaire de Lyon, Marcy l'Etoile, France
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Bruneau A, Haley N, Valiquette L. [Evaluation of a program to promote hepatitis B vaccination among adolescents in a school environment of Central Montreal]. Can J Public Health 2001. [PMID: 11702487 DOI: 10.1007/bf03404977] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE We developed a hepatitis B vaccination promotion project aimed at Montreal-area adolescents. A student leaflet, teacher's guide and classroom poster were developed. Our objectives were to have 25% of teachers give a course on hepatitis B and 25% of students begin vaccination against hepatitis B. METHOD The promotional campaign was aimed at 100,000 students in 225 public and private secondary schools. The evaluation was carried out six months after the beginning of the campaign. Data were collected through self-administered questionnaires to students (n = 206), teachers (n = 128) and school nurses (n = 30). RESULTS Two thirds of teachers used the material and 45% gave a course on the subject. The teachers who gave the course felt knowledgeable about teaching the subject and felt that the subject was important. Six months after the beginning of the campaign, 38% of secondary students had received at least one dose of vaccine. CONCLUSION The promotional material was appreciated by both students and teachers and used during secondary school classes. Teachers, when given appropriate tools and supported by school nurses, are highly motivated to pass on preventive heath messages to their students.
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Affiliation(s)
- A Bruneau
- Unité Maladies Infectieuses, Direction de la santé publique de Montréal-Centre, Québec.
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Bruneau A, Dernburg A, Chauve C, Zenner L. First in vitro cycle of the chicken mite, Dermanyssus gallinae (DeGeer 1778), utilizing an artificial feeding device. Parasitology 2001; 123:583-9. [PMID: 11814045 DOI: 10.1017/s0031182001008836] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The red poultry mite, Dermanyssus gallinae, is one of the most economically deleterious ecto-parasites of layer hens worldwide. D. gallinae is difficult to eliminate from infested poultry farms, and even to study, because it resides on the host only during the bloodmeal at night, and hides in the crevices of poultry houses during the day. Here, the life-cycle of D. gallinae was reproduced entirely in vitro. Mites were incubated in a glass pipette at 30 degrees C, 60-95 degrees relative humidity and total darkness. A feeding apparatus, composed of a membrane, reservoir and blood was fitted on the pipette during bloodmeals. We tested feeding rates on blood mixed with 1 of 3 anti-coagulants (EDTA, heparin and trisodium citrate) at different concentrations, and biological and artificial membranes. The best engorgement and survival rates for all 3 haematophagous life-stages of the parasite were observed in 1-day-old chick membranes and heparinized (0.02 mmo/ml) blood. We then describe the steps in developing a complete self-sustaining in vitro life-cycle. A colony of mites was maintained in vitro for 7 generations. Losses in the first generation were heavy, but survival had multiplied 5-fold by the fifth generation. We hypothesize that heavy mortality rates during the first life-cycle correspond to selective pressure: only the mites which fed and survived in vitro were able to reproduce.
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Affiliation(s)
- A Bruneau
- ENVL/INRA 958, Service de parasitologie, Ecole Nationale Veterinaire de Lyon, Marcy-I'Etoile, France
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Bruneau A, Lummis W, Ramsay D. Food poisoning associated with the ingestion of fiddleheads--Quebec 1999. Can Commun Dis Rep 2000; 26:165-9; discussion 169-70. [PMID: 11211700] [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: 02/19/2023]
Affiliation(s)
- A Bruneau
- Unité Maladies Infectieuses, santé publique Montréal-Centre, Montreal
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Abstract
Comparative analysis of the predicted amino acid sequences of a number of plant O-methyltransferase cDNA clones show that they share some 32-71% sequence identity, and can be grouped according to the different compounds they utilise as substrates. Five highly conserved regions are proposed as a signature for plant O-methyltransferases, two of which (regions I and IV) are believed to be involved in S-adenosyl-L-methionine and metal binding, respectively. The glycine-rich signature regions include a 36 amino acid domain which is located in the mid-terminal section of the carboxy terminus of most O-methyltransferase sequences. Cladistic analysis of the amino acid sequences suggests that plant O-methyltransferases may have arisen from common ancestral genes that were driven by different structural and/or functional requirements, and whose descendants segregated into different biochemical species. A comprehensive classification of plant O-methyltransferases is proposed following the guidelines of the Commission of Plant Gene Nomenclature.
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Affiliation(s)
- R K Ibrahim
- Department of Biology, Concordia University, Montréal, Québec, Canada
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Bruneau A, Mahanty S, al-Azraqui T, MacLean J, Bourque M, Desroches F. Ciguatera fish poisoning linked to the ingestion of barracuda in a Montreal restaurant--Quebec. Can Commun Dis Rep 1997; 23:153-6. [PMID: 9401158] [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: 02/05/2023]
Affiliation(s)
- A Bruneau
- Direction de la santé publique de Montréal Centre, QC
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Peters C, Wilson D, Bruneau A, Butt P, Hart S, Mayhew J. Alcohol risk assessment and intervention for family physicians. Project of the College of Family Physicians of Canada. Can Fam Physician 1996; 42:681-9. [PMID: 8653036 PMCID: PMC2146434] [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: 02/01/2023]
Abstract
At-risk and problem drinkers (excluding those with severe dependency) are estimated to be 20% of the Canadian population. With minimal training family physicians can effectively manage patients with alcohol problems. The Alcohol Risk Assessment and Intervention Project of the College of Family Physicians of Canada has developed materials and training for family physicians to use in helping their patients reduce the risks of alcohol-related harm.
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Affiliation(s)
- C Peters
- Hotel Dieu Family, Medicine Centre Queen's University, Kingston, Ont
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Bourquard G, Baudras R, Bruneau A, Créno M. [Care by the anesthesia specialist nurse]. Soins Chir 1992:32-6. [PMID: 1304065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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