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Lenski M, Zarcone G, Maallem S, Garçon G, Lo-Guidice JM, Allorge D, Anthérieu S. Metabolomics Provides Novel Insights into the Potential Toxicity Associated with Heated Tobacco Products, Electronic Cigarettes, and Tobacco Cigarettes on Human Bronchial Epithelial BEAS-2B Cells. Toxics 2024; 12:128. [PMID: 38393223 PMCID: PMC10893046 DOI: 10.3390/toxics12020128] [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] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/24/2024] [Accepted: 01/30/2024] [Indexed: 02/25/2024]
Abstract
Smoking is an established risk factor for various pathologies including lung cancer. Electronic cigarettes (e-cigs) and heated tobacco products (HTPs) have appeared on the market in recent years, but their safety or, conversely, their toxicity has not yet been demonstrated. This study aimed to compare the metabolome of human lung epithelial cells exposed to emissions of e-cigs, HTPs, or 3R4F cigarettes in order to highlight potential early markers of toxicity. BEAS-2B cells were cultured at the air-liquid interface and exposed to short-term emissions from e-cigs set up at low or medium power, HTPs, or 3R4F cigarettes. Untargeted metabolomic analyses were performed using liquid chromatography coupled with mass spectrometry. Compared to unexposed cells, both 3R4F cigarette and HTP emissions affected the profiles of exogenous compounds, one of which is carcinogenic, as well as those of endogenous metabolites from various pathways including oxidative stress, energy metabolism, and lipid metabolism. However, these effects were observed at lower doses for cigarettes (2 and 4 puffs) than for HTPs (60 and 120 puffs). No difference was observed after e-cig exposure, regardless of the power conditions. These results suggest a lower acute toxicity of e-cig emissions compared to cigarettes and HTPs in BEAS-2B cells. The pathways deregulated by HTP emissions are also described to be altered in respiratory diseases, emphasizing that the toxicity of HTPs should not be underestimated.
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Affiliation(s)
- Marie Lenski
- Univ. Lille, CHU Lille, Institut Pasteur de Lille, ULR 4483, IMPECS—IMPact de l’Environnement Chimique sur la Santé Humaine, F-59000 Lille, France; (M.L.); (G.Z.); (S.M.); (G.G.); (J.-M.L.-G.); (D.A.)
- CHU Lille, Unité Fonctionnelle de Toxicologie, F-59037 Lille, France
| | - Gianni Zarcone
- Univ. Lille, CHU Lille, Institut Pasteur de Lille, ULR 4483, IMPECS—IMPact de l’Environnement Chimique sur la Santé Humaine, F-59000 Lille, France; (M.L.); (G.Z.); (S.M.); (G.G.); (J.-M.L.-G.); (D.A.)
| | - Saïd Maallem
- Univ. Lille, CHU Lille, Institut Pasteur de Lille, ULR 4483, IMPECS—IMPact de l’Environnement Chimique sur la Santé Humaine, F-59000 Lille, France; (M.L.); (G.Z.); (S.M.); (G.G.); (J.-M.L.-G.); (D.A.)
| | - Guillaume Garçon
- Univ. Lille, CHU Lille, Institut Pasteur de Lille, ULR 4483, IMPECS—IMPact de l’Environnement Chimique sur la Santé Humaine, F-59000 Lille, France; (M.L.); (G.Z.); (S.M.); (G.G.); (J.-M.L.-G.); (D.A.)
| | - Jean-Marc Lo-Guidice
- Univ. Lille, CHU Lille, Institut Pasteur de Lille, ULR 4483, IMPECS—IMPact de l’Environnement Chimique sur la Santé Humaine, F-59000 Lille, France; (M.L.); (G.Z.); (S.M.); (G.G.); (J.-M.L.-G.); (D.A.)
| | - Delphine Allorge
- Univ. Lille, CHU Lille, Institut Pasteur de Lille, ULR 4483, IMPECS—IMPact de l’Environnement Chimique sur la Santé Humaine, F-59000 Lille, France; (M.L.); (G.Z.); (S.M.); (G.G.); (J.-M.L.-G.); (D.A.)
- CHU Lille, Unité Fonctionnelle de Toxicologie, F-59037 Lille, France
| | - Sébastien Anthérieu
- Univ. Lille, CHU Lille, Institut Pasteur de Lille, ULR 4483, IMPECS—IMPact de l’Environnement Chimique sur la Santé Humaine, F-59000 Lille, France; (M.L.); (G.Z.); (S.M.); (G.G.); (J.-M.L.-G.); (D.A.)
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Couderc S, Djerada Z, Rivals F, Lemaire-Hurtel AS, Lelong-Boulouard V, Lelièvre B, Abbara C, Lafay C, Abe E, Libert F, Pressiat C, Montange D, Imbert L, Tonini J, Lenski M, Guilhaumou R, Mathieu O. Questionnaire about therapeutic drug monitoring (TDM) of psychotropics for a panel of French psychiatrists. Therapie 2024:S0040-5957(24)00008-8. [PMID: 38355346 DOI: 10.1016/j.therap.2024.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 01/05/2024] [Accepted: 01/25/2024] [Indexed: 02/16/2024]
Affiliation(s)
- Sylvain Couderc
- Department of Pharmacology and Toxicology, University Hospital, 87000 Limoges, France.
| | - Zoubir Djerada
- Department of Pharmacology and Toxicology, University Hospital, 51092 Reims, France
| | - Florence Rivals
- Department of Pharmacology and Toxicology, University Hospital, 87000 Limoges, France
| | | | | | - Bénédicte Lelièvre
- Department of Pharmacology and Toxicology, University Hospital, 49100 Angers, France
| | - Chadi Abbara
- Department of Pharmacology and Toxicology, University Hospital, 49100 Angers, France
| | - Claire Lafay
- Department of Pharmacology and Toxicology, University Hospital, 86000 Poitiers, France
| | - Emuri Abe
- Department of Pharmacology and Toxicology, University Hospital, Raymond Poincare Hospital, AP-HP, 92380 Garches, France
| | - Frédéric Libert
- Department of Pharmacology, University Hospital, 63000 Clermont-Ferrand, France
| | - Claire Pressiat
- Department of Pharmacology, University Hospital, Henri-Mondor Hospital, AP-HP, 94010 Créteil, France
| | - Damien Montange
- Department of Pharmacology and Toxicology, University Hospital, 25030 Besançon, France
| | - Laurent Imbert
- Department of Pharmacology and Toxicology, University Hospital, 76000 Rouen, France
| | - Julia Tonini
- Department of Pharmacology and Toxicology, University Hospital, 38000 Grenoble, France
| | - Marie Lenski
- Department of Toxicology, University hospital, 59045 Lille, France
| | - Romain Guilhaumou
- Department of Pharmacology, University Hospital, La Timone Hospital, AP-HM, 13005 Marseille, France
| | - Olivier Mathieu
- Department of Pharmacology and Toxicology, University Hospital, 34090 Montpellier, France
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Heumel S, de Rezende Rodovalho V, Urien C, Specque F, Brito Rodrigues P, Robil C, Delval L, Sencio V, Descat A, Deruyter L, Ferreira S, Gomes Machado M, Barthelemy A, Angulo FS, Haas JT, Goosens JF, Wolowczuk I, Grangette C, Rouillé Y, Grimaud G, Lenski M, Hennart B, Ramirez Vinolo MA, Trottein F. Shotgun metagenomics and systemic targeted metabolomics highlight indole-3-propionic acid as a protective gut microbial metabolite against influenza infection. Gut Microbes 2024; 16:2325067. [PMID: 38445660 PMCID: PMC10936607 DOI: 10.1080/19490976.2024.2325067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 02/26/2024] [Indexed: 03/07/2024] Open
Abstract
The gut-to-lung axis is critical during respiratory infections, including influenza A virus (IAV) infection. In the present study, we used high-resolution shotgun metagenomics and targeted metabolomic analysis to characterize influenza-associated changes in the composition and metabolism of the mouse gut microbiota. We observed several taxonomic-level changes on day (D)7 post-infection, including a marked reduction in the abundance of members of the Lactobacillaceae and Bifidobacteriaceae families, and an increase in the abundance of Akkermansia muciniphila. On D14, perturbation persisted in some species. Functional scale analysis of metagenomic data revealed transient changes in several metabolic pathways, particularly those leading to the production of short-chain fatty acids (SCFAs), polyamines, and tryptophan metabolites. Quantitative targeted metabolomics analysis of the serum revealed changes in specific classes of gut microbiota metabolites, including SCFAs, trimethylamine, polyamines, and indole-containing tryptophan metabolites. A marked decrease in indole-3-propionic acid (IPA) blood level was observed on D7. Changes in microbiota-associated metabolites correlated with changes in taxon abundance and disease marker levels. In particular, IPA was positively correlated with some Lactobacillaceae and Bifidobacteriaceae species (Limosilactobacillus reuteri, Lactobacillus animalis) and negatively correlated with Bacteroidales bacterium M7, viral load, and inflammation markers. IPA supplementation in diseased animals reduced viral load and lowered local (lung) and systemic inflammation. Treatment of mice with antibiotics targeting IPA-producing bacteria before infection enhanced viral load and lung inflammation, an effect inhibited by IPA supplementation. The results of this integrated metagenomic-metabolomic analysis highlighted IPA as an important contributor to influenza outcomes and a potential biomarker of disease severity.
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Affiliation(s)
- Séverine Heumel
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 – UMR 9017 – CIIL – Center for Infection and Immunity of Lille, Lille, France
| | | | | | - Florian Specque
- Biomathematica, Rue des Aloes, Quartier Balestrino, Ajaccio, France
| | - Patrícia Brito Rodrigues
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 – UMR 9017 – CIIL – Center for Infection and Immunity of Lille, Lille, France
- Laboratory of Immunoinflammation, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Cyril Robil
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 – UMR 9017 – CIIL – Center for Infection and Immunity of Lille, Lille, France
| | - Lou Delval
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 – UMR 9017 – CIIL – Center for Infection and Immunity of Lille, Lille, France
| | - Valentin Sencio
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 – UMR 9017 – CIIL – Center for Infection and Immunity of Lille, Lille, France
| | - Amandine Descat
- Univ. Lille, CHU Lille, EA 7365 – GRITA – Groupe de Recherche sur les formes Injectables et les Technologies Associées, Lille, France
| | - Lucie Deruyter
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 – UMR 9017 – CIIL – Center for Infection and Immunity of Lille, Lille, France
| | | | - Marina Gomes Machado
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 – UMR 9017 – CIIL – Center for Infection and Immunity of Lille, Lille, France
| | - Adeline Barthelemy
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 – UMR 9017 – CIIL – Center for Infection and Immunity of Lille, Lille, France
| | - Fabiola Silva Angulo
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 – UMR 9017 – CIIL – Center for Infection and Immunity of Lille, Lille, France
| | - Joel. T Haas
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, Lille, France
| | - Jean François Goosens
- Univ. Lille, CHU Lille, EA 7365 – GRITA – Groupe de Recherche sur les formes Injectables et les Technologies Associées, Lille, France
| | - Isabelle Wolowczuk
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 – UMR 9017 – CIIL – Center for Infection and Immunity of Lille, Lille, France
| | - Corinne Grangette
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 – UMR 9017 – CIIL – Center for Infection and Immunity of Lille, Lille, France
| | - Yves Rouillé
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 – UMR 9017 – CIIL – Center for Infection and Immunity of Lille, Lille, France
| | - Ghjuvan Grimaud
- Biomathematica, Rue des Aloes, Quartier Balestrino, Ajaccio, France
| | - Marie Lenski
- Univ. Lrille, CHU Lille, Service de toxicologie et Génopathies, ULR 4483 – IMPECS – IMPact de l’Environnement Chimique sur la Santé humaine, Lille, France
| | - Benjamin Hennart
- Univ. Lrille, CHU Lille, Service de toxicologie et Génopathies, ULR 4483 – IMPECS – IMPact de l’Environnement Chimique sur la Santé humaine, Lille, France
| | | | - François Trottein
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 – UMR 9017 – CIIL – Center for Infection and Immunity of Lille, Lille, France
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Lefèvre CR, Sacaze E, Damaj L, Rollier P, Lenski M, Le Stradic C, Bendavid C, Reynier P, Dieu X, Prunier D, Moreau C, Homedan C. Laboratory medicine unveiling an unusual cause of D-lactic acidosis as the trigger of decompensation of a rare inborn error of metabolism. Clin Chem Lab Med 2023; 61:e263-e267. [PMID: 37327352 DOI: 10.1515/cclm-2023-0425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 06/06/2023] [Indexed: 06/18/2023]
Affiliation(s)
| | - Elise Sacaze
- Service de Pédiatrie, CHU de Brest, Brest, France
| | - Léna Damaj
- Service de Pédiatrie, CHU de Rennes, Rennes, France
| | - Paul Rollier
- Service de Génétique Clinique, CHU de Rennes, Rennes, France
| | - Marie Lenski
- Unité Fonctionnelle de Toxicologie, CHU de Lille, Lille, France
| | | | - Claude Bendavid
- Laboratoire de Biochimie-Toxicologie, CHU de Rennes, Rennes, France
| | - Pascal Reynier
- Laboratoire de Biochimie et Biologie Moléculaire, CHU d'Angers, Angers, France
| | - Xavier Dieu
- Laboratoire de Biochimie et Biologie Moléculaire, CHU d'Angers, Angers, France
| | - Delphine Prunier
- Laboratoire de Biochimie et Biologie Moléculaire, CHU d'Angers, Angers, France
| | - Caroline Moreau
- Laboratoire de Biochimie-Toxicologie, CHU de Rennes, Rennes, France
| | - Chadi Homedan
- Laboratoire de Biochimie et Biologie Moléculaire, CHU d'Angers, Angers, France
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Al Samara J, Determe W, Gernez É, Lebredonchel É, Lefèvre C, Lenski M, Tikhonov A, Vaudran L. [Junior Euromedlab 2023 feedback]. Ann Biol Clin (Paris) 2023; 81:425-434. [PMID: 37791508 DOI: 10.1684/abc.2023.1821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Affiliation(s)
- Jules Al Samara
- FNSIPBM et Laboratoire d'Hématologie, Hôpital Pitié-Salpêtrière, APHP- Sorbonne université, Paris, France
| | - William Determe
- Département de Chimie Clinique, Université de Liège (CHU ULg), Liège, Belgium
| | - Émeline Gernez
- Institut de Biochimie, Centre de Biologie Pathologie Génétique, CHU de Lille, France
| | - Élodie Lebredonchel
- Biochimie Métabolique et Cellulaire, Hôpital Bichat-Claude Bernard, AP-HP, Paris, France
| | | | - Marie Lenski
- ULR 4483, IMPECS - IMPact de l'Environnement Chimique sur la Santé humaine, Univ. Lille, Institut Pasteur de Lille et Unité Fonctionnelle de Toxicologie, CHU Lille, Lille, France
| | - Aleksei Tikhonov
- ULR 4483, IMPECS - IMPact de l'Environnement Chimique sur la Santé humaine, Univ. Lille, Institut Pasteur de Lille et Unité Fonctionnelle de Toxicologie, CHU Lille, Lille, France
| | - Lucie Vaudran
- Service de Biochimie automatisée et des protéines, CHU Lille, Lille, France
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Zarcone G, Lenski M, Martinez T, Talahari S, Simonin O, Garçon G, Allorge D, Nesslany F, Lo-Guidice JM, Platel A, Anthérieu S. Impact of Electronic Cigarettes, Heated Tobacco Products and Conventional Cigarettes on the Generation of Oxidative Stress and Genetic and Epigenetic Lesions in Human Bronchial Epithelial BEAS-2B Cells. Toxics 2023; 11:847. [PMID: 37888697 PMCID: PMC10611330 DOI: 10.3390/toxics11100847] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 10/05/2023] [Accepted: 10/05/2023] [Indexed: 10/28/2023]
Abstract
Electronic cigarettes (e-cig) and heated tobacco products (HTP) are often used as smoking cessation aids, while the harm reduction effects of these alternatives to cigarettes are still the subject of controversial debate, in particular regarding their carcinogenic potential. The objective of this study is to compare the effects of e-cig, HTP and conventional cigarette emissions on the generation of oxidative stress and genetic and epigenetic lesions in human bronchial epithelial BEAS-2B cells. Our results show that HTP were less cytotoxic than conventional cigarettes while e-cig were not substantially cytotoxic in BEAS-2B cells. E-cig had no significant effect on the Nrf2 pathway, whereas HTP and cigarettes increased the binding activity of Nrf2 to antioxidant response elements and the expression of its downstream targets HMOX1 and NQO1. Concordantly, only HTP and cigarettes induced oxidative DNA damage and significantly increased DNA strand breaks and chromosomal aberrations. Neither histone modulations nor global DNA methylation changes were found after acute exposure, regardless of the type of emissions. In conclusion, this study reveals that HTP, unlike e-cig, elicit a biological response very similar to that of cigarettes, but only after a more intensive exposure: both tobacco products induce cytotoxicity, Nrf2-dependent oxidative stress and genetic lesions in human epithelial pulmonary cells. Therefore, the health risk of HTP should not be underestimated and animal studies are required in order to determine the tumorigenic potential of these emerging products.
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Lenski M, Maallem S, Zarcone G, Garçon G, Lo-Guidice JM, Anthérieu S, Allorge D. Prediction of a Large-Scale Database of Collision Cross-Section and Retention Time Using Machine Learning to Reduce False Positive Annotations in Untargeted Metabolomics. Metabolites 2023; 13:metabo13020282. [PMID: 36837901 PMCID: PMC9962007 DOI: 10.3390/metabo13020282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 02/07/2023] [Accepted: 02/12/2023] [Indexed: 02/18/2023] Open
Abstract
Metabolite identification in untargeted metabolomics is complex, with the risk of false positive annotations. This work aims to use machine learning to successively predict the retention time (Rt) and the collision cross-section (CCS) of an open-access database to accelerate the interpretation of metabolomic results. Standards of metabolites were tested using liquid chromatography coupled with high-resolution mass spectrometry. In CCSBase and QSRR predictor machine learning models, experimental results were used to generate predicted CCS and Rt of the Human Metabolome Database. From 542 standards, 266 and 301 compounds were detected in positive and negative electrospray ionization mode, respectively, corresponding to 380 different metabolites. CCS and Rt were then predicted using machine learning tools for almost 114,000 metabolites. R2 score of the linear regression between predicted and measured data achieved 0.938 and 0.898 for CCS and Rt, respectively, demonstrating the models' reliability. A CCS and Rt index filter of mean error ± 2 standard deviations could remove most misidentifications. Its application to data generated from a toxicology study on tobacco cigarettes reduced hits by 76%. Regarding the volume of data produced by metabolomics, the practical workflow provided allows for the implementation of valuable large-scale databases to improve the biological interpretation of metabolomics data.
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Affiliation(s)
- Marie Lenski
- ULR 4483, IMPECS—IMPact de l’Environnement Chimique sur la Santé humaine, CHU Lille, Institut Pasteur de Lille, Université de Lille, F-59000 Lille, France
- CHU Lille, Unité Fonctionnelle de Toxicologie, F-59037 Lille, France
- Correspondence:
| | - Saïd Maallem
- ULR 4483, IMPECS—IMPact de l’Environnement Chimique sur la Santé humaine, CHU Lille, Institut Pasteur de Lille, Université de Lille, F-59000 Lille, France
| | - Gianni Zarcone
- ULR 4483, IMPECS—IMPact de l’Environnement Chimique sur la Santé humaine, CHU Lille, Institut Pasteur de Lille, Université de Lille, F-59000 Lille, France
| | - Guillaume Garçon
- ULR 4483, IMPECS—IMPact de l’Environnement Chimique sur la Santé humaine, CHU Lille, Institut Pasteur de Lille, Université de Lille, F-59000 Lille, France
| | - Jean-Marc Lo-Guidice
- ULR 4483, IMPECS—IMPact de l’Environnement Chimique sur la Santé humaine, CHU Lille, Institut Pasteur de Lille, Université de Lille, F-59000 Lille, France
| | - Sébastien Anthérieu
- ULR 4483, IMPECS—IMPact de l’Environnement Chimique sur la Santé humaine, CHU Lille, Institut Pasteur de Lille, Université de Lille, F-59000 Lille, France
| | - Delphine Allorge
- ULR 4483, IMPECS—IMPact de l’Environnement Chimique sur la Santé humaine, CHU Lille, Institut Pasteur de Lille, Université de Lille, F-59000 Lille, France
- CHU Lille, Unité Fonctionnelle de Toxicologie, F-59037 Lille, France
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Lenski M, Bruno C, Darrouzain F, Allorge D. Métabolomique : principes et applications en toxicologie biologique et médicolégale. Toxicologie Analytique et Clinique 2023. [DOI: 10.1016/j.toxac.2023.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Beis M, Lenski M, Hennart B, Bertola JS, Allorge D, Mégarbane B. [Severe hypoglycemia with cardiac arrest after massive tramadol ingestion - a case report]. Therapie 2022; 77:750-753. [PMID: 35624040 DOI: 10.1016/j.therap.2022.04.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 04/10/2022] [Accepted: 04/15/2022] [Indexed: 01/13/2023]
Affiliation(s)
- Mathieu Beis
- Réanimation médicale, centre hospitalier Émile-Durkheim, 88000 Épinal, France.
| | - Marie Lenski
- University Lille, CHU Lille, institut Pasteur Lille, ULR 4483 - IMPECS - IMPact de l'environnement chimique sur la santé humaine, 59000 Lille, France
| | - Benjamin Hennart
- Service de toxicologie - génopathies, CHU Lille, 59000 Lille, France
| | - Julien Scala Bertola
- Service de pharmacologie clinique et toxicologie, université Lorraine, CHRU Nancy, 54000 Nancy, France
| | - Delphine Allorge
- University Lille, CHU Lille, institut Pasteur Lille, ULR 4483 - IMPECS - IMPact de l'environnement chimique sur la santé humaine, 59000 Lille, France
| | - Bruno Mégarbane
- Réanimation médicale et toxicologique, hôpital Lariboisière, fédération de toxicologie AP-HP, Inserm ULRS-1144, université de Paris Centre, 75010 Paris, France
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Lenski M, Zarcone G, Maallem S, Lo-Guidice JM, Garçon G, Anthérieu S, Allorge D. P20-02 Metabolomic strategy to identify markers of exposure and toxicity of electronic cigarettes, heated tobacco products and tobacco cigarettes. Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.668] [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: 10/14/2022]
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Grenier C, Gish A, Lenski M, Hakim F, Allorge D, Gaulier JM. Intérêt de l’identification et de la quantification de l’Aldicarbe en association avec le dosage de l’activité des cholinestérases : exemple d’un cas d’intoxication. Toxicologie Analytique et Clinique 2022. [DOI: 10.1016/j.toxac.2022.05.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Salle S, Beualieu Q, Richeval C, Blanc VL, Ranaivoson F, Tournebize J, Gish A, Lenski M, Hakim F, Allorge D, Gaulier JM. Interest of nails analysis to investigate synthetic cannabinoid exposure? A case report. Toxicologie Analytique et Clinique 2022. [DOI: 10.1016/j.toxac.2022.06.118] [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: 10/15/2022]
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Gierschke P, Grebing C, Abdelaal M, Lenski M, Buldt J, Wang Z, Heuermann T, Mueller M, Gebhardt M, Rothhardt J, Limpert J. Nonlinear pulse compression to 51-W average power GW-class 35-fs pulses at 2-µm wavelength in a gas-filled multi-pass cell. Opt Lett 2022; 47:3511-3514. [PMID: 35838716 DOI: 10.1364/ol.462647] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 06/15/2022] [Indexed: 06/15/2023]
Abstract
We report on the generation of GW-class peak power, 35-fs pulses at 2-µm wavelength with an average power of 51 W at 300-kHz repetition rate. A compact, krypton-filled Herriott-type cavity employing metallic mirrors is used for spectral broadening. This multi-pass compression stage enables the efficient post compression of the pulses emitted by an ultrafast coherently combined thulium-doped fiber laser system. The presented results demonstrate an excellent preservation of the input beam quality in combination with a power transmission as high as 80%. These results show that multi-pass cell based post-compression is an attractive alternative to nonlinear spectral broadening in fibers, which is commonly employed for thulium-doped and other mid-infrared ultrafast laser systems. Particularly, the average power scalability and the potential to achieve few-cycle pulse durations make this scheme highly attractive.
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Zarrouk E, Lenski M, Bruno C, Thibert V, Contreras P, Privat K, Ameline A, Fabresse N. High-resolution mass spectrometry: Theoretical and technological aspects. Toxicologie Analytique et Clinique 2022. [DOI: 10.1016/j.toxac.2021.11.002] [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: 10/19/2022]
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Carton L, Niot C, Kyheng M, Petrault M, Laloux C, Potey C, Lenski M, Bordet R, Deguil J. Lack of direct involvement of a diazepam long-term treatment in the occurrence of irreversible cognitive impairment: a pre-clinical approach. Transl Psychiatry 2021; 11:612. [PMID: 34857741 PMCID: PMC8640018 DOI: 10.1038/s41398-021-01718-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 09/20/2021] [Accepted: 10/25/2021] [Indexed: 11/11/2022] Open
Abstract
Several observational studies have found a link between the long-term use of benzodiazepines and dementia, which remains controversial. Our study was designed to assess (i) whether the long-term use of benzodiazepines, at two different doses, has an irreversible effect on cognition, (ii) and whether there is an age-dependent effect. One hundred and five C57Bl/6 male mice were randomly assigned to the 15 mg/kg/day, the 30 mg/kg/day diazepam-supplemented pellets, or the control group. Each group comprised mice aged 6 or 12 months at the beginning of the experiments and treated for 16 weeks. Two sessions of behavioral assessment were conducted: after 8 weeks of treatment and after treatment completion following a 1-week wash-out period. The mid-treatment test battery included the elevated plus maze test, the Y maze spontaneous alternation test, and the open field test. The post-treatment battery was upgraded with three additional tests: the novel object recognition task, the Barnes maze test, and the touchscreen-based paired-associated learning task. At mid-treatment, working memory was impaired in the 15 mg/kg diazepam group compared to the control group (p = 0.005). No age effect was evidenced. The post-treatment assessment of cognitive functions (working memory, visual recognition memory, spatial reference learning and memory, and visuospatial memory) did not significantly differ between groups. Despite a cognitive impact during treatment, the lack of cognitive impairment after long-term treatment discontinuation suggests that benzodiazepines alone do not cause irreversible deleterious effects on cognitive functions and supports the interest of discontinuation in chronically treated patients.
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Affiliation(s)
- Louise Carton
- Univ. Lille, Inserm, CHU Lille, Lille Neuroscience and Cognition, Degenerative and Vascular Cognitive Disorders, UMR-S1172, 59000, Lille, France.
| | - Candice Niot
- Pharmacy Service, Arras Hospital Center, 62000 Arras, France
| | - Maéva Kyheng
- grid.410463.40000 0004 0471 8845Univ. Lille, CHU Lille, ULR 2694 - METRICS: Évaluation des Technologies de Santé et des Pratiques Médicales, 59000 Lille, France ,grid.410463.40000 0004 0471 8845Département de Biostatistiques, CHU Lille, 59000 Lille, France
| | - Maud Petrault
- grid.410463.40000 0004 0471 8845Univ. Lille, Inserm, CHU Lille, Lille Neuroscience and Cognition, Degenerative and Vascular Cognitive Disorders, UMR-S1172, 59000 Lille, France
| | - Charlotte Laloux
- grid.410463.40000 0004 0471 8845Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, US 41 - UMS 2014 - PLBS, Lille In vivo Imaging and Functional Exploration, 59000 Lille, France
| | - Camille Potey
- grid.410463.40000 0004 0471 8845Univ. Lille, Inserm, CHU Lille, Lille Neuroscience and Cognition, Degenerative and Vascular Cognitive Disorders, UMR-S1172, 59000 Lille, France
| | - Marie Lenski
- grid.410463.40000 0004 0471 8845Univ. Lille, CHU Lille, Institut Pasteur de Lille, ULR 4483 - IMPECS – Impact de l’Environnement Chimique sur la Santé, 59000 Lille, France
| | - Régis Bordet
- grid.410463.40000 0004 0471 8845Univ. Lille, Inserm, CHU Lille, Lille Neuroscience and Cognition, Degenerative and Vascular Cognitive Disorders, UMR-S1172, 59000 Lille, France
| | - Julie Deguil
- grid.410463.40000 0004 0471 8845Univ. Lille, Inserm, CHU Lille, Lille Neuroscience and Cognition, Degenerative and Vascular Cognitive Disorders, UMR-S1172, 59000 Lille, France
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Gish A, Robveille C, Gicquel T, Chopin A, Lenski M, Hakim F, Beaulieu Q, Richeval C, Wiart J, Allorge D, Gault G, Gaulier JM. Documentation analytique d’une intoxication fatale d’un cheval Pur-Sang Arabe par l’oenanthe safranée (Oenanthe crocata). Toxicologie Analytique et Clinique 2021. [DOI: 10.1016/j.toxac.2021.08.009] [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: 12/01/2022]
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Lenski M, Sidibé J, Gholam M, Hennart B, Dubath C, Augsburger M, von Gunten A, Conus P, Allorge D, Thomas A, Eap CB. Metabolomic alteration induced by psychotropic drugs: Short-term metabolite profile as a predictor of weight gain evolution. Clin Transl Sci 2021; 14:2544-2555. [PMID: 34387942 PMCID: PMC8604229 DOI: 10.1111/cts.13122] [Citation(s) in RCA: 1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/26/2021] [Accepted: 07/10/2021] [Indexed: 11/28/2022] Open
Abstract
Psychotropic drugs can induce strong metabolic adverse effects, potentially increasing morbidity and/or mortality of patients. Metabolomic profiling, by studying the levels of numerous metabolic intermediates and products in the blood, allows a more detailed examination of metabolism dysfunctions. We aimed to identify blood metabolomic markers associated with weight gain in psychiatric patients. Sixty-two patients starting a treatment known to induce weight gain were recruited. Two hundred and six selected metabolites implicated in various pathways were analyzed in plasma, at baseline and after 1 month of treatment. Additionally, 15 metabolites of the kynurenine pathway were quantified. This latter analysis was repeated in a confirmatory cohort of 24 patients. Among the 206 metabolites, a plasma metabolomic fingerprint after 1 month of treatment embedded 19 compounds from different chemical classes (amino acids, acylcarnitines, carboxylic acids, catecholamines, nucleosides, pyridine, and tetrapyrrole) potentially involved in metabolic disruption and inflammation processes. The predictive potential of such early metabolite changes on 3 months of weight evolution was then explored using a linear mixed-effects model. Of these 19 metabolites, short-term modifications of kynurenine, hexanoylcarnitine, and biliverdin, as well as kynurenine/tryptophan ratio at 1 month, were associated with 3 months weight evolution. Alterations of the kynurenine pathway were confirmed by quantification, in both exploratory and confirmatory cohorts. Our metabolomic study suggests a specific metabolic dysregulation after 1 month of treatment with psychotropic drugs known to induce weight gain. The identified metabolomic signature could contribute in the future to the prediction of weight gain in patients treated with psychotropic drugs.
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Affiliation(s)
- Marie Lenski
- Univ. LilleCHU LilleInstitut Pasteur de LilleULR 4483 – IMPECS – IMPact de l’Environnement Chimique sur la Santé humaineLilleFrance
| | - Jonathan Sidibé
- Unit of Forensic Toxicology and ChemistryCURMLLausanne University HospitalGeneva University HospitalsLausanne, GenevaSwitzerland
| | - Mehdi Gholam
- Department of PsychiatryCenter for Psychiatric Epidemiology and PsychopathologyLausanne University HospitalUniversity of LausannePrillySwitzerland
| | - Benjamin Hennart
- Univ. LilleCHU LilleInstitut Pasteur de LilleULR 4483 – IMPECS – IMPact de l’Environnement Chimique sur la Santé humaineLilleFrance
| | - Céline Dubath
- Unit of Pharmacogenetics and Clinical PsychopharmacologyDepartment of PsychiatryCenter for Psychiatric NeuroscienceLausanne University HospitalUniversity of LausannePrillySwitzerland
| | - Marc Augsburger
- Unit of Forensic Toxicology and ChemistryCURMLLausanne University HospitalGeneva University HospitalsLausanne, GenevaSwitzerland
| | - Armin von Gunten
- Service of Old Age PsychiatryDepartment of PsychiatryLausanne University HospitalUniversity of LausannePrillySwitzerland
| | - Philippe Conus
- Service of General PsychiatryDepartment of PsychiatryLausanne University HospitalUniversity of LausannePrillySwitzerland
| | - Delphine Allorge
- Univ. LilleCHU LilleInstitut Pasteur de LilleULR 4483 – IMPECS – IMPact de l’Environnement Chimique sur la Santé humaineLilleFrance
| | - Aurelien Thomas
- Unit of Forensic Toxicology and ChemistryCURMLLausanne University HospitalGeneva University HospitalsLausanne, GenevaSwitzerland
- Faculty Unit of ToxicologyFaculty of Biology and MedicineCURML, Lausanne University HospitalUniversity of LausanneLausanneSwitzerland
| | - Chin B. Eap
- Unit of Pharmacogenetics and Clinical PsychopharmacologyDepartment of PsychiatryCenter for Psychiatric NeuroscienceLausanne University HospitalUniversity of LausannePrillySwitzerland
- Center for Research and Innovation in Clinical Pharmaceutical SciencesUniversity of LausanneSwitzerland
- School of Pharmaceutical SciencesUniversity of GenevaGenevaSwitzerland
- Institute of Pharmaceutical Sciences of Western SwitzerlandUniversity of GenevaUniversity of LausanneLausanneSwitzerland
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Lenski M, Grenier C, Billotte M, Mazeau G, Riquet A, Gish A, Hakim F, Beauval N, Hennart B, Allorge D, Gaulier JM. Cas d’intoxication éthylique aiguë chez un nourrisson : considérations médico-légales et clinico-biologiques. Toxicologie Analytique et Clinique 2021. [DOI: 10.1016/j.toxac.2021.06.061] [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: 10/20/2022]
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Gebhardt M, Heuermann T, Klas R, Liu C, Kirsche A, Lenski M, Wang Z, Gaida C, Antonio-Lopez JE, Schülzgen A, Amezcua-Correa R, Rothhardt J, Limpert J. Bright, high-repetition-rate water window soft X-ray source enabled by nonlinear pulse self-compression in an antiresonant hollow-core fibre. Light Sci Appl 2021; 10:36. [PMID: 33579895 PMCID: PMC7881106 DOI: 10.1038/s41377-021-00477-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 01/07/2021] [Accepted: 01/18/2021] [Indexed: 05/31/2023]
Abstract
Bright, coherent soft X-ray radiation is essential to a variety of applications in fundamental research and life sciences. To date, a high photon flux in this spectral region can only be delivered by synchrotrons, free-electron lasers or high-order harmonic generation sources, which are driven by kHz-class repetition rate lasers with very high peak powers. Here, we establish a novel route toward powerful and easy-to-use SXR sources by presenting a compact experiment in which nonlinear pulse self-compression to the few-cycle regime is combined with phase-matched high-order harmonic generation in a single, helium-filled antiresonant hollow-core fibre. This enables the first 100 kHz-class repetition rate, table-top soft X-ray source that delivers an application-relevant flux of 2.8 × 106 photon s-1 eV-1 around 300 eV. The fibre integration of temporal pulse self-compression (leading to the formation of the necessary strong-field waveforms) and pressure-controlled phase matching will allow compact, high-repetition-rate laser technology, including commercially available systems, to drive simple and cost-effective, coherent high-flux soft X-ray sources.
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Affiliation(s)
- M Gebhardt
- Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Albert-Einstein-Str. 15, 07745, Jena, Germany.
- Helmholtz-Institute Jena, Fröbelstieg 3, 07743, Jena, Germany.
| | - T Heuermann
- Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Albert-Einstein-Str. 15, 07745, Jena, Germany
- Helmholtz-Institute Jena, Fröbelstieg 3, 07743, Jena, Germany
| | - R Klas
- Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Albert-Einstein-Str. 15, 07745, Jena, Germany
- Helmholtz-Institute Jena, Fröbelstieg 3, 07743, Jena, Germany
| | - C Liu
- Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Albert-Einstein-Str. 15, 07745, Jena, Germany
- Helmholtz-Institute Jena, Fröbelstieg 3, 07743, Jena, Germany
| | - A Kirsche
- Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Albert-Einstein-Str. 15, 07745, Jena, Germany
- Helmholtz-Institute Jena, Fröbelstieg 3, 07743, Jena, Germany
| | - M Lenski
- Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Albert-Einstein-Str. 15, 07745, Jena, Germany
| | - Z Wang
- Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Albert-Einstein-Str. 15, 07745, Jena, Germany
| | - C Gaida
- Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Albert-Einstein-Str. 15, 07745, Jena, Germany
- Active Fiber Systems GmbH, Ernst-Ruska-Ring 17, 07745, Jena, Germany
| | - J E Antonio-Lopez
- CREOL, College of Optics and Photonics, University of Central Florida, Orlando, FL, 32816, USA
| | - A Schülzgen
- CREOL, College of Optics and Photonics, University of Central Florida, Orlando, FL, 32816, USA
| | - R Amezcua-Correa
- CREOL, College of Optics and Photonics, University of Central Florida, Orlando, FL, 32816, USA
| | - J Rothhardt
- Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Albert-Einstein-Str. 15, 07745, Jena, Germany
- Helmholtz-Institute Jena, Fröbelstieg 3, 07743, Jena, Germany
- Fraunhofer Institute for Applied Optics and Precision Engineering, Albert-Einstein-Str. 7, 07745, Jena, Germany
| | - J Limpert
- Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Albert-Einstein-Str. 15, 07745, Jena, Germany
- Helmholtz-Institute Jena, Fröbelstieg 3, 07743, Jena, Germany
- Fraunhofer Institute for Applied Optics and Precision Engineering, Albert-Einstein-Str. 7, 07745, Jena, Germany
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Lenski M, Allorge D, Eap CB, Thomas A. Prise de poids induite par les psychotropes : contribution d’une méthode de métabolomique ciblée pour identifier de potentiels biomarqueurs prédictifs. Toxicologie Analytique et Clinique 2019. [DOI: 10.1016/j.toxac.2019.03.078] [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: 10/26/2022]
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Suchorska B, Biczok A, Lenski M, Albert NL, Schüller U, Tonn J. P07.16 Prognostic value of contrast enhancement and histopathological grading in diffuse gliomas depends on IDH1/2 mutation. Neuro Oncol 2016. [DOI: 10.1093/neuonc/now188.127] [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: 11/13/2022] Open
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Abstract
BACKGROUND The hands of medical stuff are the most important vectors for the transmission of pathogens in the hospital. Furthermore a "bare below the elbows dress code" has been introduced in Great Britain. OBJECTIVES Aim of this study was to investigate whether workwear contamination of the medical stuff by pathogens is similar to the contamination of their hands and whether wearing workwear is associated with increased transmission risk. MATERIAL AND METHODS In total 54 swabs were collected from nursing stuff, medical doctors, patients and hospital work material. RESULTS Patients had a statistically significant more dense colonization with bacteria (median = 73 colony-forming units (CFU)), than the sleeves of the doctor's coat (median = 36 CFU, p = 0,005), followed by workwear of the nursing stuff at the end of a shift (median = 23 CFU, p < 0,001) and the hospital work material (median = 15 CFU, p < 0,001). Isolated pathogens were coagulase-negative staphylococci, Staphylococcus aureus, Enterobacter cloacae and Acinetobacter species. CONCLUSIONS Contaminated work wear presents a relevant risk for the transmission of pathogens. A "bare below the elbow dress-code" or the daily change of the doctor's coat appear both to represent reasonable measures to reduce the transmission risk of pathogens in hospitals.
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Affiliation(s)
- M Lenski
- Neurochirurgische Klinik und Poliklinik, Ludwig Maximilians Universität München, Marchioninistraße 15, 81377, München, Deutschland. .,Orthpädie und Unfallchirurgie, HELIOS Klinikum Dachau, akademisches Lehrkrankenhaus der LMU München, Krankenhausstraße 15, 85221, Dachau, Deutschland.
| | - M A Scherer
- Orthpädie und Unfallchirurgie, HELIOS Klinikum Dachau, akademisches Lehrkrankenhaus der LMU München, Krankenhausstraße 15, 85221, Dachau, Deutschland
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Lenski M, Schleider G, Adrian L, Kohlhaas M, Maack C, Boehm M, Laufs U. Cardiac metabolism during atrial fibrillation is characterized by increased lipid accumulation and glycogen synthesis. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3259] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lenski M, Kazakov A, Marx N, Böhm M, Laufs U. Effects of DPP-4 inhibition on cardiac metabolism and function in mice. J Mol Cell Cardiol 2011; 51:906-18. [PMID: 21871459 DOI: 10.1016/j.yjmcc.2011.08.001] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [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] [Received: 04/25/2011] [Revised: 06/27/2011] [Accepted: 08/05/2011] [Indexed: 01/13/2023]
Abstract
Type 2 diabetes is associated with an increased risk of cardiac complications. Inhibitors of dipeptidylpeptidase 4 (DPP-4) are novel drugs for the treatment of patients with type 2 diabetes. The effect of DPP-4 inhibitors on myocardial metabolism has not been studied in detail. In wild-type C57Bl6-mice, 3weeks of treatment with sitagliptin had no effect on body weight and glucose tolerance nor on phosphorylation of AMP-activated protein kinase (AMPK) and acetyl-CoAcarboxylase (ACC), phosphofructokinase-2 (PFK2) or tuberin-2 (TSC2) in the left ventricular myocardium. However, in 10week old db/db-/- mice, a model of diabetes and obesity, sitagliptin potently reduced plasma glucose rise in peritoneal glucose tolerance tests and reduced weight increase. The myocardium of untreated db/db-/- mice exhibited a marked increase of the phosphorylation of AMPK, ACC, TSC2, expression of p53 and fatty acid translocase (FAT/CD36) membrane expression. These changes were reduced by DPP-4 inhibition. Sitagliptin showed no effect on cardiomyocyte size but prevented myocardial fibrosis in the 10week old db/db-/- mice and reduced expression of TGF-β1, markers of oxidative stress and the accumulation of advanced glycation end products in cardiomyocytes. Working heart analyses did not show an effect of sitagliptin on parameters of systolic cardiac function. In animals with diabetes and obesity, sitagliptin improved glucose tolerance, reduced weight gain, myocardial fibrosis and oxidative stress. Furthermore the study provides evidence that treatment with sitagliptin decreases elevated myocardial fatty acid uptake and oxidation in the diabetic heart. These observations show beneficial myocardial metabolic effect of DPP-4 inhibition in this mouse model of diabetes and obesity.
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Affiliation(s)
- M Lenski
- Klinik für Innere Medizin III, Kardiologie, Angiologie und Internistische Intensivmedizin, Universitätsklinikum des Saarlandes, Homburg/Saar, Germany.
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