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Coutry N, Nguyen J, Soualhi S, Gerbe F, Meslier V, Dardalhon V, Almeida M, Quinquis B, Thirion F, Herbert F, Gasmi I, Lamrani A, Giordano A, Cesses P, Garnier L, Thirard S, Greuet D, Cazevieille C, Bernex F, Bressuire C, Winton D, Matsumoto I, Blottière HM, Taylor N, Jay P. Cross talk between Paneth and tuft cells drives dysbiosis and inflammation in the gut mucosa. Proc Natl Acad Sci U S A 2023; 120:e2219431120. [PMID: 37307458 DOI: 10.1073/pnas.2219431120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 05/01/2023] [Indexed: 06/14/2023] Open
Abstract
Gut microbiota imbalance (dysbiosis) is increasingly associated with pathological conditions, both within and outside the gastrointestinal tract. Intestinal Paneth cells are considered to be guardians of the gut microbiota, but the events linking Paneth cell dysfunction with dysbiosis remain unclear. We report a three-step mechanism for dysbiosis initiation. Initial alterations in Paneth cells, as frequently observed in obese and inflammatorybowel diseases patients, cause a mild remodeling of microbiota, with amplification of succinate-producing species. SucnR1-dependent activation of epithelial tuft cells triggers a type 2 immune response that, in turn, aggravates the Paneth cell defaults, promoting dysbiosis and chronic inflammation. We thus reveal a function of tuft cells in promoting dysbiosis following Paneth cell deficiency and an unappreciated essential role of Paneth cells in maintaining a balanced microbiota to prevent inappropriate activation of tuft cells and deleterious dysbiosis. This succinate-tuft cell inflammation circuit may also contribute to the chronic dysbiosis observed in patients.
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Affiliation(s)
- Nathalie Coutry
- Institute of Functional Genomics, University of Montpellier, CNRS, Inserm, Equipe Labellisée Ligue contre le Cancer, 34000 Montpellier, France
| | - Julie Nguyen
- Institute of Functional Genomics, University of Montpellier, CNRS, Inserm, Equipe Labellisée Ligue contre le Cancer, 34000 Montpellier, France
| | - Salima Soualhi
- Institute of Functional Genomics, University of Montpellier, CNRS, Inserm, Equipe Labellisée Ligue contre le Cancer, 34000 Montpellier, France
| | - François Gerbe
- Institute of Functional Genomics, University of Montpellier, CNRS, Inserm, Equipe Labellisée Ligue contre le Cancer, 34000 Montpellier, France
| | - Victoria Meslier
- Paris-Saclay University, Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE), MetaGenoPolis, 78350, Jouy-en-Josas, France
| | - Valérie Dardalhon
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, 34000 Montpellier, France
| | - Mathieu Almeida
- Paris-Saclay University, Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE), MetaGenoPolis, 78350, Jouy-en-Josas, France
| | - Benoit Quinquis
- Paris-Saclay University, Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE), MetaGenoPolis, 78350, Jouy-en-Josas, France
| | - Florence Thirion
- Paris-Saclay University, Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE), MetaGenoPolis, 78350, Jouy-en-Josas, France
| | - Fabien Herbert
- Institute of Functional Genomics, University of Montpellier, CNRS, Inserm, Equipe Labellisée Ligue contre le Cancer, 34000 Montpellier, France
| | - Imène Gasmi
- Institute of Functional Genomics, University of Montpellier, CNRS, Inserm, Equipe Labellisée Ligue contre le Cancer, 34000 Montpellier, France
| | - Ali Lamrani
- Institute of Functional Genomics, University of Montpellier, CNRS, Inserm, Equipe Labellisée Ligue contre le Cancer, 34000 Montpellier, France
| | - Alicia Giordano
- Institute of Functional Genomics, University of Montpellier, CNRS, Inserm, Equipe Labellisée Ligue contre le Cancer, 34000 Montpellier, France
| | - Pierre Cesses
- Institute of Functional Genomics, University of Montpellier, CNRS, Inserm, Equipe Labellisée Ligue contre le Cancer, 34000 Montpellier, France
| | - Laure Garnier
- Institute of Functional Genomics, University of Montpellier, CNRS, Inserm, Equipe Labellisée Ligue contre le Cancer, 34000 Montpellier, France
| | - Steeve Thirard
- Institute of Functional Genomics, University of Montpellier, CNRS, Inserm, Equipe Labellisée Ligue contre le Cancer, 34000 Montpellier, France
| | - Denis Greuet
- Institute of Functional Genomics, University of Montpellier, CNRS, Inserm, Equipe Labellisée Ligue contre le Cancer, 34000 Montpellier, France
| | - Chantal Cazevieille
- Institut des Neurosciences de Montpellier, University of Montpellier, 34000 Montpellier, France
| | - Florence Bernex
- Réseau d'Histologie Expérimentale de Montpellier, University of Montpellier, BioCampus, CNRS, INSERM, 34000 Montpellier, France
| | - Christelle Bressuire
- Paris-Saclay University, Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE), MetaGenoPolis, 78350, Jouy-en-Josas, France
- Paris-Saclay University, INRAE, AgroParisTech, Micalis Institute 78350, Jouy-en-Josas, France
| | - Douglas Winton
- Cancer Research-UK Cambridge Institute, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, United Kingdom
| | | | - Hervé M Blottière
- Paris-Saclay University, Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE), MetaGenoPolis, 78350, Jouy-en-Josas, France
- Nantes Université, INRAE, UR1280, PhAN, F-44000, Nantes, France
| | - Naomi Taylor
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, 34000 Montpellier, France
- Pediatric Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20814
| | - Philippe Jay
- Institute of Functional Genomics, University of Montpellier, CNRS, Inserm, Equipe Labellisée Ligue contre le Cancer, 34000 Montpellier, France
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Bidaud I, D'Souza A, Forte G, Torre E, Greuet D, Thirard S, Anderson C, Chung You Chong A, Torrente AG, Roussel J, Wickman K, Boyett MR, Mangoni ME, Mesirca P. Genetic Ablation of G Protein-Gated Inwardly Rectifying K + Channels Prevents Training-Induced Sinus Bradycardia. Front Physiol 2021; 11:519382. [PMID: 33551824 PMCID: PMC7857143 DOI: 10.3389/fphys.2020.519382] [Citation(s) in RCA: 7] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 12/17/2020] [Indexed: 11/13/2022] Open
Abstract
Background: Endurance athletes are prone to bradyarrhythmias, which in the long-term may underscore the increased incidence of pacemaker implantation reported in this population. Our previous work in rodent models has shown training-induced sinus bradycardia to be due to microRNA (miR)-mediated transcriptional remodeling of the HCN4 channel, leading to a reduction of the "funny" (I f) current in the sinoatrial node (SAN). Objective: To test if genetic ablation of G-protein-gated inwardly rectifying potassium channel, also known as I KACh channels prevents sinus bradycardia induced by intensive exercise training in mice. Methods: Control wild-type (WT) and mice lacking GIRK4 (Girk4 -/-), an integral subunit of I KACh were assigned to trained or sedentary groups. Mice in the trained group underwent 1-h exercise swimming twice a day for 28 days, 7 days per week. We performed electrocardiogram recordings and echocardiography in both groups at baseline, during and after the training period. At training cessation, mice were euthanized and SAN tissues were isolated for patch clamp recordings in isolated SAN cells and molecular profiling by quantitative PCR (qPCR) and western blotting. Results: At swimming cessation trained WT mice presented with a significantly lower resting HR that was reversible by acute I KACh block whereas Girk4 -/- mice failed to develop a training-induced sinus bradycardia. In line with HR reduction, action potential rate, density of I f, as well as of T- and L-type Ca2+ currents (I CaT and I CaL ) were significantly reduced only in SAN cells obtained from WT-trained mice. I f reduction in WT mice was concomitant with downregulation of HCN4 transcript and protein, attributable to increased expression of corresponding repressor microRNAs (miRs) whereas reduced I CaL in WT mice was associated with reduced Cav1.3 protein levels. Strikingly, I KACh ablation suppressed all training-induced molecular remodeling observed in WT mice. Conclusion: Genetic ablation of cardiac I KACh in mice prevents exercise-induced sinus bradycardia by suppressing training induced remodeling of inward currents I f, I CaT and I CaL due in part to the prevention of miR-mediated transcriptional remodeling of HCN4 and likely post transcriptional remodeling of Cav1.3. Strategies targeting cardiac I KACh may therefore represent an alternative to pacemaker implantation for bradyarrhythmias seen in some veteran athletes.
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Affiliation(s)
- Isabelle Bidaud
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France.,LabEx Ion Channels Science and Therapeutics, Montpellier, France
| | - Alicia D'Souza
- Division of Cardiovascular Sciences, University of Manchester, Manchester, United Kingdom
| | - Gabriella Forte
- Division of Cardiovascular Sciences, University of Manchester, Manchester, United Kingdom
| | - Eleonora Torre
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France.,LabEx Ion Channels Science and Therapeutics, Montpellier, France
| | - Denis Greuet
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Steeve Thirard
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Cali Anderson
- Division of Cardiovascular Sciences, University of Manchester, Manchester, United Kingdom
| | - Antony Chung You Chong
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France.,LabEx Ion Channels Science and Therapeutics, Montpellier, France
| | - Angelo G Torrente
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France.,LabEx Ion Channels Science and Therapeutics, Montpellier, France
| | - Julien Roussel
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Kevin Wickman
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, United States
| | - Mark R Boyett
- Division of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Matteo E Mangoni
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France.,LabEx Ion Channels Science and Therapeutics, Montpellier, France
| | - Pietro Mesirca
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France.,LabEx Ion Channels Science and Therapeutics, Montpellier, France
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André S, Boukhaddaoui H, Campo B, Al-Jumaily M, Mayeux V, Greuet D, Valmier J, Scamps F. Axotomy-induced expression of calcium-activated chloride current in subpopulations of mouse dorsal root ganglion neurons. J Neurophysiol 2003; 90:3764-73. [PMID: 12944538 DOI: 10.1152/jn.00449.2003] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.4] [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: 11/22/2022] Open
Abstract
Whole cell patch-clamp recordings of calcium-activated chloride current [ICl(Ca)] were made from adult sensory neurons of naive and axotomized mouse L4-L6 lumbar dorsal root ganglia after 1 day of culture in vitro. A basal ICl(Ca) was specifically expressed in a subset of naive medium-diameter neurons (30-40 microm). Prior nerve injury, induced by sciatic nerve transection 5 days before experiments, increased both ICl(Ca) amplitude and its expression in medium-diameter neurons. Moreover, nerve injury also induced ICl(Ca) expression in a new subpopulation of neurons, the large-diameter neurons (40-50 microm). Small-diameter neurons (inferior to 30 microm) never expressed ICl(Ca). Regulated ICl(Ca) expression was strongly correlated with injury-induced regenerative growth of sensory neurons in vitro and nerve regeneration in vivo. Cell culture on a substrate not permissive for growth, D,L-polyornithine, prevented both elongation growth and ICl(Ca) expression in axotomized neurons. Regenerative growth and the induction of ICl(Ca) expression take place 2 days after injury, peak after 5 days of conditioning in vivo, slowly declining thereafter to control values. The selective expression of ICl(Ca) within medium- and large-diameter neurons conditioned for rapid, efficient growth suggests that these channels play a specific role in postinjury behavior of sensory neuron subpopulations such as neuropathic pain and/or axonal regeneration.
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Affiliation(s)
- Sylvain André
- Institut National de la Santé et de la Recherche Médicale U-583, Université Montpellier II, 34095, Montpellier 5, France
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Perez N, Plence P, Millet V, Greuet D, Minot C, Noel D, Danos O, Jorgensen C, Apparailly F. Tetracycline transcriptional silencer tightly controls transgene expression after in vivo intramuscular electrotransfer: application to interleukin 10 therapy in experimental arthritis. Hum Gene Ther 2002; 13:2161-72. [PMID: 12542847 DOI: 10.1089/104303402320987851] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The doxycycline (Dox)-inducible reverse tetracycline transactivator (rtTA) is often used to control gene expression. However, the Tet-on system displays a high background activity. To overcome this unregulated expression we used the tetracycline-dependent transcriptional silencer (tTS), which binds the tetO inducible promoter in the absence of Dox. Controlled gene expression was analyzed in vivo by delivering combinations of Dox-regulated luciferase reporter construct, rtTA, and tTS expression plasmids into mouse muscle, using electrotransfer. Elevated luciferase expression levels were observed in the absence of doxycycline, and a 10-fold induction was obtained after drug administration. In contrast, when tTS was added, background expression was dramatically lowered by three to four orders of magnitude, and induction was maintained. The tTS system was then used to control expression of a therapeutic gene in experimental arthritis. DBA/1 mice were coinjected with plasmids encoding the antiinflammatory interleukin-10 cytokine under the control of the tetO promoter, the rtTA, and the tTS. Electrotransfer resulted in a dose-dependent increase in IL-10 expression, maintained over a 3-month period, and significant inhibitory effects on collagen-induced arthritis. We conclude that the use of tTS significantly improves the utility of the rtTA system for somatic gene transfer by reducing background activity.
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Affiliation(s)
- Norma Perez
- Genethon, CNRS URA 1923, 91000 Evry, France.
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