1
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Song AT, Sindeaux RHM, Li Y, Affia H, Agnihotri T, Leclerc S, van Vliet PP, Colas M, Guimond JV, Patey N, Feulner L, Joyal JS, Haddad E, Barreiro L, Andelfinger G. Developmental role of macrophages modeled in human pluripotent stem cell-derived intestinal tissue. Cell Rep 2024; 43:113616. [PMID: 38150367 DOI: 10.1016/j.celrep.2023.113616] [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] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/22/2023] [Accepted: 12/07/2023] [Indexed: 12/29/2023] Open
Abstract
Macrophages populate the embryo early in gestation, but their role in development is not well defined. In particular, specification and function of macrophages in intestinal development remain little explored. To study this event in the human developmental context, we derived and combined human intestinal organoid and macrophages from pluripotent stem cells. Macrophages migrate into the organoid, proliferate, and occupy the emerging microanatomical niches of epithelial crypts and ganglia. They also acquire a transcriptomic profile similar to that of fetal intestinal macrophages and display tissue macrophage behaviors, such as recruitment to tissue injury. Using this model, we show that macrophages reduce glycolysis in mesenchymal cells and limit tissue growth without affecting tissue architecture, in contrast to the pro-growth effect of enteric neurons. In short, we engineered an intestinal tissue model populated with macrophages, and we suggest that resident macrophages contribute to the regulation of metabolism and growth of the developing intestine.
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Affiliation(s)
- Andrew T Song
- Centre de Recherche, CHU Sainte-Justine, Montréal, QC, Canada; Department of Anatomy and Cell Biology, McGill University, Montréal, QC, Canada.
| | - Renata H M Sindeaux
- Centre de Recherche, CHU Sainte-Justine, Montréal, QC, Canada; Meakins Christie Laboratories, Department of Medicine, Department of Microbiology and Immunology, Department of Pathology Research Institute of McGill University Health Centre, Montréal, QC, Canada
| | - Yuanyi Li
- Centre de Recherche, CHU Sainte-Justine, Montréal, QC, Canada
| | - Hicham Affia
- Centre de Recherche, CHU Sainte-Justine, Montréal, QC, Canada
| | - Tapan Agnihotri
- Centre de Recherche, CHU Sainte-Justine, Montréal, QC, Canada; Department of Pharmacology and Therapeutics, McGill University, Montréal, QC, Canada
| | | | | | - Mathieu Colas
- Centre de Recherche, CHU Sainte-Justine, Montréal, QC, Canada
| | - Jean-Victor Guimond
- CLSC des Faubourgs, CIUSSS du Centre-Sud-de-l'Ile-de-Montréal, Montréal, QC, Canada
| | - Natalie Patey
- Department of Pathology, CHU Sainte-Justine, Université de Montréal, Montréal, QC, Canada
| | - Lara Feulner
- Centre de Recherche, CHU Sainte-Justine, Montréal, QC, Canada
| | - Jean-Sebastien Joyal
- Centre de Recherche, CHU Sainte-Justine, Montréal, QC, Canada; Département de Pédiatrie, Université de Montréal, Montréal, QC, Canada; Department of Pharmacology and Therapeutics, McGill University, Montréal, QC, Canada
| | - Elie Haddad
- Centre de Recherche, CHU Sainte-Justine, Montréal, QC, Canada; Département de Pédiatrie, Université de Montréal, Montréal, QC, Canada
| | - Luis Barreiro
- Centre de Recherche, CHU Sainte-Justine, Montréal, QC, Canada; Genetics Genomics and Systems Biology, University of Chicago, Chicago, IL, USA
| | - Gregor Andelfinger
- Centre de Recherche, CHU Sainte-Justine, Montréal, QC, Canada; Department of Anatomy and Cell Biology, McGill University, Montréal, QC, Canada; Département de Pédiatrie, Université de Montréal, Montréal, QC, Canada.
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2
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Moreno-Campos R, Singleton EW, Uribe RA. A targeted CRISPR-Cas9 mediated F0 screen identifies genes involved in establishment of the enteric nervous system. bioRxiv 2023:2023.12.28.573581. [PMID: 38234831 PMCID: PMC10793464 DOI: 10.1101/2023.12.28.573581] [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] [Indexed: 01/19/2024]
Abstract
The vertebrate enteric nervous system (ENS) is a crucial network of enteric neurons and glia resident within the entire gastrointestinal tract (GI). Overseeing essential GI functions such as gut motility and water balance, the ENS serves as a pivotal bidirectional link in the gut-brain axis. During early development, the ENS is primarily derived from enteric neural crest cells (ENCCs). Disruptions to ENCC development, as seen in conditions like Hirschsprung disease (HSCR), lead to absence of ENS in the GI, particularly in the colon. In this study, using zebrafish, we devised an in vivo F0 CRISPR-based screen employing a robust, rapid pipeline integrating single-cell RNA sequencing, CRISPR reverse genetics, and high-content imaging. Our findings unveil various genes, including those encoding for opioid receptors, as possible regulators of ENS establishment. In addition, we present evidence that suggests opioid receptor involvement in neurochemical coding of the larval ENS. In summary, our work presents a novel, efficient CRISPR screen targeting ENS development, facilitating the discovery of previously unknown genes, and increasing knowledge of nervous system construction.
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Affiliation(s)
- Rodrigo Moreno-Campos
- Biosciences Department, Rice University, Houston, Texas, 77005, U.S.A
- Laboratory of Neural Crest and Enteric Nervous System Development, Rice University, Houston, Texas, 77005, U.S.A
| | - Eileen W. Singleton
- Biosciences Department, Rice University, Houston, Texas, 77005, U.S.A
- Laboratory of Neural Crest and Enteric Nervous System Development, Rice University, Houston, Texas, 77005, U.S.A
| | - Rosa A. Uribe
- Biosciences Department, Rice University, Houston, Texas, 77005, U.S.A
- Laboratory of Neural Crest and Enteric Nervous System Development, Rice University, Houston, Texas, 77005, U.S.A
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3
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Stavely R, Ott LC, Rashidi N, Sakkal S, Nurgali K. The Oxidative Stress and Nervous Distress Connection in Gastrointestinal Disorders. Biomolecules 2023; 13:1586. [PMID: 38002268 PMCID: PMC10669114 DOI: 10.3390/biom13111586] [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] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/19/2023] [Accepted: 10/23/2023] [Indexed: 11/26/2023] Open
Abstract
Oxidative stress is increasingly recognized as a central player in a range of gastrointestinal (GI) disorders, as well as complications stemming from therapeutic interventions. This article presents an overview of the mechanisms of oxidative stress in GI conditions and highlights a link between oxidative insult and disruption to the enteric nervous system (ENS), which controls GI functions. The dysfunction of the ENS is characteristic of a spectrum of disorders, including neurointestinal diseases and conditions such as inflammatory bowel disease (IBD), diabetic gastroparesis, and chemotherapy-induced GI side effects. Neurons in the ENS, while essential for normal gut function, appear particularly vulnerable to oxidative damage. Mechanistically, oxidative stress in enteric neurons can result from intrinsic nitrosative injury, mitochondrial dysfunction, or inflammation-related pathways. Although antioxidant-based therapies have shown limited efficacy, recognizing the multifaceted role of oxidative stress in GI diseases offers a promising avenue for future interventions. This comprehensive review summarizes the literature to date implicating oxidative stress as a critical player in the pathophysiology of GI disorders, with a focus on its role in ENS injury and dysfunction, and highlights opportunities for the development of targeted therapeutics for these diseases.
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Affiliation(s)
- Rhian Stavely
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Leah C. Ott
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Niloufar Rashidi
- Institute for Health and Sport, Victoria University, St Albans, VIC 3021, Australia
| | - Samy Sakkal
- Institute for Health and Sport, Victoria University, St Albans, VIC 3021, Australia
| | - Kulmira Nurgali
- Institute for Health and Sport, Victoria University, St Albans, VIC 3021, Australia
- Department of Medicine Western Health, The University of Melbourne, St Albans, VIC 3021, Australia
- Regenerative Medicine and Stem Cell Program, Australian Institute for Musculoskeletal Science (AIMSS), St Albans, VIC 3021, Australia
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4
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Lucarini E, Micheli L, Toti A, Ciampi C, Margiotta F, Di Cesare Mannelli L, Ghelardini C. Anti-Hyperalgesic Efficacy of Acetyl L-Carnitine (ALCAR) Against Visceral Pain Induced by Colitis: Involvement of Glia in the Enteric and Central Nervous System. Int J Mol Sci 2023; 24:14841. [PMID: 37834289 PMCID: PMC10573187 DOI: 10.3390/ijms241914841] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 09/22/2023] [Accepted: 09/25/2023] [Indexed: 10/15/2023] Open
Abstract
The management of abdominal pain in patients affected by inflammatory bowel diseases (IBDs) still represents a problem because of the lack of effective treatments. Acetyl L-carnitine (ALCAR) has proved useful in the treatment of different types of chronic pain with excellent tolerability. The present work aimed at evaluating the anti-hyperalgesic efficacy of ALCAR in a model of persistent visceral pain associated with colitis induced by 2,4-dinitrobenzene sulfonic acid (DNBS) injection. Two different protocols were applied. In the preventive protocol, ALCAR was administered daily starting 14 days to 24 h before the delivery of DNBS. In the interventive protocol, ALCAR was daily administered starting the same day of DNBS injection, and the treatment was continued for 14 days. In both cases, ALCAR significantly reduced the establishment of visceral hyperalgesia in DNBS-treated animals, though the interventive protocol showed a greater efficacy than the preventive one. The interventive protocol partially reduced colon damage in rats, counteracting enteric glia and spinal astrocyte activation resulting from colitis, as analyzed by immunofluorescence. On the other hand, the preventive protocol effectively protected enteric neurons from the inflammatory insult. These findings suggest the putative usefulness of ALCAR as a food supplement for patients suffering from IBDs.
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Affiliation(s)
- Elena Lucarini
- Department of Neuroscience, Psychology, Drug Research and Child Health (NEUROFARBA), Pharmacology and Toxicology Section, University of Florence, 50139 Florence, Italy; (L.M.); (A.T.); (C.C.); (F.M.); (L.D.C.M.); (C.G.)
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5
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Liu J, Zhang P, Zheng Z, Afridi MI, Zhang S, Wan Z, Zhang X, Stingelin L, Wang Y, Tu H. GABAergic signaling between enteric neurons and intestinal smooth muscle promotes innate immunity and gut defense in Caenorhabditis elegans. Immunity 2023; 56:1515-1532.e9. [PMID: 37437538 DOI: 10.1016/j.immuni.2023.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 03/06/2023] [Accepted: 06/07/2023] [Indexed: 07/14/2023]
Abstract
The nervous system is critical for intestinal homeostasis and function, but questions remain regarding its impact on gut immune defense. By screening the major neurotransmitters of C. elegans, we found that γ-aminobutyric acid (GABA) deficiency enhanced susceptibility to pathogenic Pseudomonas aeruginosa PA14 infection. GABAergic signaling between enteric neurons and intestinal smooth muscle promoted gut defense in a PMK-1/p38-dependent, but IIS/DAF-16- and DBL-1/TGF-β-independent, pathway. Transcriptomic profiling revealed that the neuropeptide, FLP-6, acted downstream of enteric GABAergic signaling. Further data determined that FLP-6 was expressed and secreted by intestinal smooth muscle cells and functioned as a paracrine molecule on the intestinal epithelium. FLP-6 suppressed the transcription factors ZIP-10 and KLF-1 that worked in parallel and converged to the PMK-1/p38 pathway in the intestinal epithelia for innate immunity and gut defense. Collectively, these findings uncover an enteric neuron-muscle-epithelium axis that may be evolutionarily conserved in higher organisms.
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Affiliation(s)
- Junqiang Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, Hunan University, Changsha 410082, Hunan, China
| | - Pei Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, Hunan University, Changsha 410082, Hunan, China
| | - Zhongfan Zheng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, Hunan University, Changsha 410082, Hunan, China
| | - Muhammad Irfan Afridi
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, Hunan University, Changsha 410082, Hunan, China
| | - Shan Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, Hunan University, Changsha 410082, Hunan, China
| | - Zhiqing Wan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, Hunan University, Changsha 410082, Hunan, China
| | - Xiumei Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, Hunan University, Changsha 410082, Hunan, China
| | - Lukas Stingelin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, Hunan University, Changsha 410082, Hunan, China
| | - Yirong Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, Hunan University, Changsha 410082, Hunan, China
| | - Haijun Tu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, Hunan University, Changsha 410082, Hunan, China.
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6
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Thomasi B, Gulbransen B. Mini-Review: Intercellular communication between enteric glia and neurons. Neurosci Lett 2023; 806:137263. [PMID: 37085112 PMCID: PMC10150911 DOI: 10.1016/j.neulet.2023.137263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/13/2023] [Accepted: 04/17/2023] [Indexed: 04/23/2023]
Abstract
The enteric nervous system is a dense network of enteric neurons and glia housed in the gastrointestinal tract. This system is responsible for performing several functions that enable digestion as well as maintaining gut homeostasis through diverse signaling processes including those that arise from interactions with the immune system. Bidirectional communication between enteric neurons and enteric glia has gained increased attention for playing essential roles in enteric nervous system function. Neuronal mediators such as neurotransmitters stimulate enteric glia and subsequent gliotransmission processes refine neuronal signaling during intestinal motor control. In this mini-review, we present and discuss the basis of intercellular signaling between neurons and glia in the enteric nervous system and the relevance of these interactions to gut function.
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7
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Ganz J, Ratcliffe EM. Who's talking to whom: microbiome-enteric nervous system interactions in early life. Am J Physiol Gastrointest Liver Physiol 2023; 324:G196-G206. [PMID: 36625480 PMCID: PMC9988524 DOI: 10.1152/ajpgi.00166.2022] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 12/22/2022] [Accepted: 01/04/2023] [Indexed: 01/11/2023]
Abstract
The enteric nervous system (ENS) is the intrinsic nervous system of the gastrointestinal tract (GI) and regulates important GI functions, including motility, nutrient uptake, and immune response. The development of the ENS begins during early organogenesis and continues to develop once feeding begins, with ongoing plasticity into adulthood. There has been increasing recognition that the intestinal microbiota and ENS interact during critical periods, with implications for normal development and potential disease pathogenesis. In this review, we focus on insights from mouse and zebrafish model systems to compare and contrast how each model can serve in elucidating the bidirectional communication between the ENS and the microbiome. At the end of this review, we further outline implications for human disease and highlight research innovations that can lead the field forward.
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Affiliation(s)
- Julia Ganz
- Department of Integrative Biology, Michigan State University, East Lansing, Michigan, United States
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8
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Caillaud M, Le Dréan ME, De-Guilhem-de-Lataillade A, Le Berre-Scoul C, Montnach J, Nedellec S, Loussouarn G, Paillé V, Neunlist M, Boudin H. A functional network of highly pure enteric neurons in a dish. Front Neurosci 2023; 16:1062253. [PMID: 36685225 PMCID: PMC9853279 DOI: 10.3389/fnins.2022.1062253] [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: 10/05/2022] [Accepted: 12/02/2022] [Indexed: 01/09/2023] Open
Abstract
The enteric nervous system (ENS) is the intrinsic nervous system that innervates the entire digestive tract and regulates major digestive functions. Recent evidence has shown that functions of the ENS critically rely on enteric neuronal connectivity; however, experimental models to decipher the underlying mechanisms are limited. Compared to the central nervous system, for which pure neuronal cultures have been developed for decades and are recognized as a reference in the field of neuroscience, an equivalent model for enteric neurons is lacking. In this study, we developed a novel model of highly pure rat embryonic enteric neurons with dense and functional synaptic networks. The methodology is simple and relatively fast. We characterized enteric neurons using immunohistochemical, morphological, and electrophysiological approaches. In particular, we demonstrated the applicability of this culture model to multi-electrode array technology as a new approach for monitoring enteric neuronal network activity. This in vitro model of highly pure enteric neurons represents a valuable new tool for better understanding the mechanisms involved in the establishment and maintenance of enteric neuron synaptic connectivity and functional networks.
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Affiliation(s)
- Martial Caillaud
- Nantes Université, INSERM, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France,*Correspondence: Martial Caillaud,
| | - Morgane E. Le Dréan
- Nantes Université, INSERM, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France
| | | | - Catherine Le Berre-Scoul
- Nantes Université, INSERM, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France
| | - Jérôme Montnach
- Nantes Université, CNRS, INSERM, L’institut du Thorax, Nantes, France
| | - Steven Nedellec
- Nantes Université, CHU Nantes, CNRS, INSERM, BioCore, US16, SFR Bonamy, Nantes, France
| | - Gildas Loussouarn
- Nantes Université, CNRS, INSERM, L’institut du Thorax, Nantes, France
| | - Vincent Paillé
- Nantes Université, INRAE, IMAD, CRNH-O, UMR 1280, PhAN, Nantes, France
| | - Michel Neunlist
- Nantes Université, INSERM, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France
| | - Hélène Boudin
- Nantes Université, INSERM, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France
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9
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de Guilhem de Lataillade A, Caillaud M, Oullier T, Naveilhan P, Pellegrini C, Tolosa E, Neunlist M, Rolli-Derkinderen M, Gelpi E, Derkinderen P. LRRK2 expression in normal and pathologic human gut and in rodent enteric neural cell lines. J Neurochem 2023; 164:193-209. [PMID: 36219522 DOI: 10.1111/jnc.15704] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 09/01/2022] [Accepted: 09/15/2022] [Indexed: 02/04/2023]
Abstract
Leucine-rich repeat kinase 2 (LRRK2) gene, which is the gene most commonly associated with Parkinson's disease (PD), is also a susceptibility gene for Crohn's disease, thereby suggesting that LRRK2 may sit at the crossroads of gastrointestinal inflammation, Parkinson's, and Crohn's disease. LRRK2 protein has been studied intensely in both CNS neurons and in immune cells, but there are only few studies on LRRK2 in the enteric nervous system (ENS). LRRK2 is present in ENS ganglia and the existing studies on LRRK2 expression in colonic biopsies from PD subjects have yielded conflicting results. Herein, we propose to extend these findings by studying in more details LRRK2 expression in the ENS. LRRK2 expression was evaluated in full thickness segments of colon of 16 Lewy body, 12 non-Lewy body disorders cases, and 3 non-neurodegenerative controls and in various enteric neural cell lines. We showed that, in addition to enteric neurons, LRRK2 is constitutively expressed in enteric glial cells in both fetal and adult tissues. LRRK2 immunofluorescence intensity in the myenteric ganglia was not different between Lewy body and non-Lewy body disorders. Additionally, we identified the cAMP pathway as a key signaling pathway involved in the regulation of LRRK2 expression and phosphorylation in the enteric glial cells. Our study is the first detailed characterization of LRRK2 in the ENS and the first to show that enteric glial cells express LRRK2. Our findings provide a basis to unravel the functions of LRRK2 in the ENS and to further investigate the pathological changes in enteric synucleinopathies.
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Affiliation(s)
| | - Martial Caillaud
- Nantes Université, CHU Nantes, INSERM, The enteric nervous system in gut and brain disorders, Nantes, France
| | - Thibauld Oullier
- Nantes Université, CHU Nantes, INSERM, The enteric nervous system in gut and brain disorders, Nantes, France
| | - Philippe Naveilhan
- Nantes Université, CHU Nantes, INSERM, The enteric nervous system in gut and brain disorders, Nantes, France
| | - Carolina Pellegrini
- Unit of Histology and Embryology, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Eduardo Tolosa
- Parkinson disease and Movement Disorders Unit, Neurology Service, Hospital Clínic de Barcelona, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona (UB), Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED: CB06/05/0018-ISCIII), Barcelona, Spain
| | - Michel Neunlist
- Nantes Université, CHU Nantes, INSERM, The enteric nervous system in gut and brain disorders, Nantes, France
| | - Malvyne Rolli-Derkinderen
- Nantes Université, CHU Nantes, INSERM, The enteric nervous system in gut and brain disorders, Nantes, France
| | - Ellen Gelpi
- Neurological Tissue Bank of the Biobank-Hospital Clínic de Barcelona, Universitat de Barcelona, Barcelona, Spain.,Division of Neuropathology and Neurochemistry, Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Pascal Derkinderen
- Nantes Université, CHU Nantes, INSERM, The enteric nervous system in gut and brain disorders, Nantes, France
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10
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Bandla A, Melancon E, Taylor CR, Davidson AE, Eisen JS, Ganz J. A New Transgenic Tool to Study the Ret Signaling Pathway in the Enteric Nervous System. Int J Mol Sci 2022; 23:ijms232415667. [PMID: 36555308 PMCID: PMC9779438 DOI: 10.3390/ijms232415667] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 11/23/2022] [Accepted: 12/02/2022] [Indexed: 12/14/2022] Open
Abstract
The receptor tyrosine kinase Ret plays a critical role in regulating enteric nervous system (ENS) development. Ret is important for proliferation, migration, and survival of enteric progenitor cells (EPCs). Ret also promotes neuronal fate, but its role during neuronal differentiation and in the adult ENS is less well understood. Inactivating RET mutations are associated with ENS diseases, e.g., Hirschsprung Disease, in which distal bowel lacks ENS cells. Zebrafish is an established model system for studying ENS development and modeling human ENS diseases. One advantage of the zebrafish model system is that their embryos are transparent, allowing visualization of developmental phenotypes in live animals. However, we lack tools to monitor Ret expression in live zebrafish. Here, we developed a new BAC transgenic line that expresses GFP under the ret promoter. We find that EPCs and the majority of ENS neurons express ret:GFP during ENS development. In the adult ENS, GFP+ neurons are equally present in females and males. In homozygous mutants of ret and sox10-another important ENS developmental regulator gene-GFP+ ENS cells are absent. In summary, we characterize a ret:GFP transgenic line as a new tool to visualize and study the Ret signaling pathway from early development through adulthood.
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Affiliation(s)
- Ashoka Bandla
- Department of Integrative Biology, Michigan State University, East Lansing, MI 48824, USA
| | - Ellie Melancon
- Institute of Neuroscience, University of Oregon, Eugene, OR 97403, USA
| | - Charlotte R. Taylor
- Institute of Neuroscience, University of Oregon, Eugene, OR 97403, USA
- Department of Biochemistry & Biophysics, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Ann E. Davidson
- Department of Integrative Biology, Michigan State University, East Lansing, MI 48824, USA
| | - Judith S. Eisen
- Institute of Neuroscience, University of Oregon, Eugene, OR 97403, USA
| | - Julia Ganz
- Department of Integrative Biology, Michigan State University, East Lansing, MI 48824, USA
- Correspondence:
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Imafuku F, Miyazaki I, Sun J, Kamimai S, Shimizu T, Toyota T, Okamoto Y, Isooka N, Kikuoka R, Kitamura Y, Asanuma M. Central and Enteric Neuroprotective Effects by Eucommia ulmoides Extracts on Neurodegeneration in Rotenone-induced Parkinsonian Mouse. Acta Med Okayama 2022; 76:373-383. [PMID: 36123151 DOI: 10.18926/amo/63889] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Parkinson's disease (PD) is a progressive neurodegenerative disease of both the central and peripheral / enteric nervous systems. Oxidative stress and neuroinflammation are associated with the pathogenesis of PD, suggesting that anti-oxidative and anti-inflammatory compounds could be neuroprotective agents for PD. Eucommia ulmoides (EU) is a traditional herbal medicine which exerts neuroprotective effects by anti-inflammatory and anti-oxidative properties. Our previous study showed that treatment with chlorogenic acid, a component of EU, protected against neurodegeneration in the central and enteric nervous systems in a PD model. In this study, we examined the effects of EU extract (EUE) administration on dopaminergic neurodegeneration, glial response and α-synuclein expression in the substantia nigra pars compacta (SNpc), and intestinal enteric neurodegeneration in low-dose rotenone-induced PD model mice. Daily oral administration of EUE ameliorated dopaminergic neurodegeneration and α-synuclein accumulation in the SNpc. EUE treatment inhibited rotenone-induced decreases in the number of total astrocytes and in those expressing the antioxidant molecule metallothionein. EUE also prevented rotenone-induced microglial activation. Furthermore, EUE treatment exerted protective effects against intestinal neuronal loss in the PD model. These results suggest that EU exerts neuroprotective effects in the central and enteric nervous systems of rotenone-induced parkinsonism mice, in part by glial modification.
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Affiliation(s)
- Fuminori Imafuku
- Department of Medical Neurobiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
| | - Ikuko Miyazaki
- Department of Medical Neurobiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
| | - Jin Sun
- Department of Medical Neurobiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
| | - Sunao Kamimai
- Department of Medical Neurobiology, Okayama University Medical School
| | - Takashi Shimizu
- Department of Medical Neurobiology, Okayama University Medical School
| | - Toshiaki Toyota
- Department of Medical Neurobiology, Okayama University Medical School
| | - Yusei Okamoto
- Department of Medical Neurobiology, Okayama University Medical School
| | - Nami Isooka
- Department of Medical Neurobiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
| | - Ryo Kikuoka
- Department of Medical Neurobiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
- Department of Pharmacy, Okayama University Hospital
| | - Yoshihisa Kitamura
- Department of Pharmacy, Okayama University Hospital
- Department of Pharmacotherapy, School of Pharmacy, Shujitsu University
| | - Masato Asanuma
- Department of Medical Neurobiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
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12
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Lassozé S, de Guilhem de Lataillade A, Oullier T, Neunslist M, Leclair-Visonneau L, Derkinderen P, Paillusson S. Comparison of commercially available antibodies for the detection of phosphorylated alpha-synuclein in primary culture of ENS. Neurogastroenterol Motil 2022; 34:e14354. [PMID: 35279896 DOI: 10.1111/nmo.14354] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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] [Received: 11/11/2021] [Revised: 02/04/2022] [Accepted: 02/08/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND It is now well established that phosphorylated alpha-synuclein histopathology, the pathologic hallmark of Parkinson's disease (PD) is not limited to the brain but also extends to the enteric nervous system (ENS). This observation led to the hypothesis that the ENS could play a pivotal role in the development of PD. Research on the enteric synucleinopathy has, however, been hampered by difficulties in detecting phosphorylated alpha-synuclein in the ENS by Western blotting, even when the transferred membrane is fixed with an optimized protocol. This suggests that the available antibodies used in previous studies lacked of sensitivity for the detection of phosphorylated alpha-synuclein at Ser129 in enteric neurons. Here, we evaluated three recent commercially available phospho-alpha-synuclein antibodies and compared them to two antibodies used in previous research. METHODS The specificity and sensitivity of the 5 antibodies were evaluated by Western blot performed with recombinant alpha-synuclein and with protein lysates from rat primary cultures of ENS. In primary culture of ENS, additional experiments were performed with the most specific antibody in order to modulate alpha-synuclein phosphorylation and to validate its utilization in immunofluorescence experiments. RESULTS The rabbit monoclonal antibody D1R1R uniquely and robustly detected endogenous phosphorylated alpha-synuclein at Ser129 in rat primary culture of ENS without any non-specific bands, allowing for a reliable analysis of phosphorylated alpha-synuclein regulation by pharmacologic means. CONCLUSIONS AND INFERENCES Using D1R1R antibody together with the optimized protocol for membrane fixation may help deciphering the signaling pathways involved in enteric alpha-synuclein post-translational regulation in PD.
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Affiliation(s)
- Simon Lassozé
- Université de Nantes, Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France.,Department of Neurology, CHU Nantes, Nantes, France
| | - Adrien de Guilhem de Lataillade
- Université de Nantes, Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France.,Department of Neurology, CHU Nantes, Nantes, France
| | - Thibauld Oullier
- Université de Nantes, Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France
| | - Michel Neunslist
- Université de Nantes, Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France
| | - Laurène Leclair-Visonneau
- Université de Nantes, Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France.,Department of Neurology, CHU Nantes, Nantes, France
| | - Pascal Derkinderen
- Université de Nantes, Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France.,Department of Neurology, CHU Nantes, Nantes, France
| | - Sébastien Paillusson
- Université de Nantes, Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France
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13
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Nguyen VTT, Taheri N, Chandra A, Hayashi Y. Aging of enteric neuromuscular systems in gastrointestinal tract. Neurogastroenterol Motil 2022; 34:e14352. [PMID: 35279912 PMCID: PMC9308104 DOI: 10.1111/nmo.14352] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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] [Received: 09/18/2021] [Revised: 01/12/2022] [Accepted: 02/09/2022] [Indexed: 12/13/2022]
Abstract
BACKGROUND Aging is a complex biological process and associated with a progressive decline in functions of most organs including the gastrointestinal (GI) tract. Age-related GI motor disorders/dysfunctions include esophageal reflux, dysphagia, constipation, fecal incontinence, reduced compliance, and accommodation. Although the incidence and severity of these diseases and conditions increase with age, they are often underestimated due in part to nonspecific and variable symptoms and lack of sufficient medical attention. They negatively affect quality of life and predispose the elderly to other diseases, sarcopenia, and frailty. The mechanisms underlying aging-associated GI dysfunctions remain unclear, and there is limited data examining the effect of aging on GI motor functions. Many studies on aging-associated changes to cells within the tunica muscularis including enteric neurons, smooth muscles, and interstitial cells have proposed that cell loss and/or molecular changes may be involved in the pathogenesis of age-related GI motor disorders/dysfunctions. There is also evidence that the aging contributes to phenotypic changes in innate immune cells, which are physically and functionally linked to other cells in the tunica muscularis and can alter GI (patho) physiology. However, various patterns of changes have been reported, some of which are contradictory, indicating a need for additional work in this area. PURPOSE Although GI infection due to intestinal bacterial overgrowth, bleeding, and cancers are also important and common problems in the elderly patients, this mini-review focuses on data obtained from enteric neuromuscular aging research with the goal of better understanding the cellular and molecular mechanisms of enteric neuromuscular aging to enhance future therapy.
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Affiliation(s)
- Vy Truong Thuy Nguyen
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Rochester, Minnesota, USA,Gastroenterology Research Unit, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Negar Taheri
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Rochester, Minnesota, USA,Gastroenterology Research Unit, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Abhishek Chandra
- Division of Geriatric Medicine and Gerontology, Department of Medicine, Mayo Clinic College of Medicine, Rochester, Minnesota, USA,Robert and Arlene Kogod Center on Aging, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Yujiro Hayashi
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Rochester, Minnesota, USA,Gastroenterology Research Unit, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
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14
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Martin S, Battistini C, Sun J. A Gut Feeling in Amyotrophic Lateral Sclerosis: Microbiome of Mice and Men. Front Cell Infect Microbiol 2022; 12:839526. [PMID: 35360111 PMCID: PMC8963415 DOI: 10.3389/fcimb.2022.839526] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 02/14/2022] [Indexed: 02/06/2023] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a severely debilitating disease characterized by progressive degeneration of motor neurons. ALS etiology and pathophysiology are not well understood. It could be the consequences of complex interactions among host factors, microbiome, and the environmental factors. Recent data suggest the novel roles of intestinal dysfunction and microbiota in ALS etiology and progression. Although microbiome may indeed play a critical role in ALS pathogenesis, studies implicating innate immunity and intestinal changes in early disease pathology are limited. The gastrointestinal symptoms in the ALS patients before their diagnosis are largely ignored in the current medical practice. This review aims to explore existing evidence of gastrointestinal symptoms and progress of microbiome in ALS pathogenesis from human and animal studies. We discuss dietary, metabolites, and possible therapeutic approaches by targeting intestinal function and microbiome. Finally, we evaluate existing evidence and identify gaps in the knowledge for future directions in ALS. It is essential to understanding the microbiome and intestinal pathogenesis that determine when, where, and whether microbiome and metabolites critical to ALS progression. These studies will help us to develop more accurate diagnosis and better treatment not only for this challenging disease, but also for other neurodegenerative diseases.
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Affiliation(s)
- Sarah Martin
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Carolina Battistini
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Jun Sun
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Illinois at Chicago, Chicago, IL, United States,Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL, United States,University of Illinois at Chicago (UIC) Cancer Center, University of Illinois at Chicago, Chicago, IL, United States,Jesse Brown VA Medical Center, Chicago, IL, United States,*Correspondence: Jun Sun,
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15
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O’Day C, Finkelstein DI, Diwakarla S, McQuade RM. A Critical Analysis of Intestinal Enteric Neuron Loss and Constipation in Parkinson's Disease. J Parkinsons Dis 2022; 12:1841-1861. [PMID: 35848035 PMCID: PMC9535602 DOI: 10.3233/jpd-223262] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/26/2022] [Indexed: 06/06/2023]
Abstract
Constipation afflicts many patients with Parkinson's disease (PD) and significantly impacts on patient quality of life. PD-related constipation is caused by intestinal dysfunction, but the etiology of this dysfunction in patients is unknown. One possible cause is neuron loss within the enteric nervous system (ENS) of the intestine. This review aims to 1) Critically evaluate the evidence for and against intestinal enteric neuron loss in PD patients, 2) Justify why PD-related constipation must be objectively measured, 3) Explore the potential link between loss of enteric neurons in the intestine and constipation in PD, 4) Provide potential explanations for disparities in the literature, and 5) Outline data and study design considerations to improve future research. Before the connection between intestinal enteric neuron loss and PD-related constipation can be confidently described, future research must use sufficiently large samples representative of the patient population (majority diagnosed with idiopathic PD for at least 5 years), implement a consistent neuronal quantification method and study design, including standardized patient recruitment criteria, objectively quantify intestinal dysfunctions, publish with a high degree of data transparency and account for potential PD heterogeneity. Further investigation into other potential influencers of PD-related constipation is also required, including changes in the function, connectivity, mitochondria and/or α-synuclein proteins of enteric neurons and their extrinsic innervation. The connection between enteric neuron loss and other PD-related gastrointestinal (GI) issues, including gastroparesis and dysphagia, as well as changes in nutrient absorption and the microbiome, should be explored in future research.
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Affiliation(s)
- Chelsea O’Day
- Gut-Axis Injury & Repair Laboratory, Department of Medicine - Western Centre for Health Research and Education (WCHRE), The University of Melbourne, Sunshine Hospital, St Albans, VIC, Australia
- The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
- Australian Institute of Musculoskeletal Science (AIMSS), Western Centre for Health Research and Education (WCHRE) Level 3 and 4, Sunshine Hospital, St Albans, VIC, Australia
| | - David Isaac Finkelstein
- Parkinson’s Disease Laboratory, The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
| | - Shanti Diwakarla
- Gut-Axis Injury & Repair Laboratory, Department of Medicine - Western Centre for Health Research and Education (WCHRE), The University of Melbourne, Sunshine Hospital, St Albans, VIC, Australia
- The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
- Australian Institute of Musculoskeletal Science (AIMSS), Western Centre for Health Research and Education (WCHRE) Level 3 and 4, Sunshine Hospital, St Albans, VIC, Australia
| | - Rachel Mai McQuade
- Gut-Axis Injury & Repair Laboratory, Department of Medicine - Western Centre for Health Research and Education (WCHRE), The University of Melbourne, Sunshine Hospital, St Albans, VIC, Australia
- The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
- Australian Institute of Musculoskeletal Science (AIMSS), Western Centre for Health Research and Education (WCHRE) Level 3 and 4, Sunshine Hospital, St Albans, VIC, Australia
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16
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Sohrabi M, Sahu B, Kaur H, Hasler WA, Prakash A, Combs CK. Gastrointestinal Changes and Alzheimer's Disease. Curr Alzheimer Res 2022; 19:335-350. [PMID: 35718965 PMCID: PMC10497313 DOI: 10.2174/1567205019666220617121255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/08/2022] [Accepted: 03/06/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND There is a well-described mechanism of communication between the brain and gastrointestinal system in which both organs influence the function of the other. This bi-directional communication suggests that disease in either organ may affect function in the other. OBJECTIVE To assess whether the evidence supports gastrointestinal system inflammatory or degenerative pathophysiology as a characteristic of Alzheimer's disease (AD). METHODS A review of both rodent and human studies implicating gastrointestinal changes in AD was performed. RESULTS Numerous studies indicate that AD changes are not unique to the brain but also occur at various levels of the gastrointestinal tract involving both immune and neuronal changes. In addition, it appears that numerous conditions and diseases affecting regions of the tract may communicate to the brain to influence disease. CONCLUSION Gastrointestinal changes represent an overlooked aspect of AD, representing a more system influence of this disease.
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Affiliation(s)
- Mona Sohrabi
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202-9037, USA
| | - Bijayani Sahu
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202-9037, USA
| | - Harpreet Kaur
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202-9037, USA
| | - Wendie A Hasler
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202-9037, USA
| | - Atish Prakash
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202-9037, USA
| | - Colin K Combs
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202-9037, USA
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17
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Yashiro T, Ogata H, Zaidi SF, Lee J, Hayashi S, Yamamoto T, Kadowaki M. Pathophysiological Roles of Neuro-Immune Interactions between Enteric Neurons and Mucosal Mast Cells in the Gut of Food Allergy Mice. Cells 2021; 10:1586. [PMID: 34201851 PMCID: PMC8305700 DOI: 10.3390/cells10071586] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 06/17/2021] [Accepted: 06/22/2021] [Indexed: 12/20/2022] Open
Abstract
Recently, the involvement of the nervous system in the pathology of allergic diseases has attracted increasing interest. However, the precise pathophysiological role of enteric neurons in food allergies has not been elucidated. We report the presence of functional high-affinity IgE receptors (FcεRIs) in enteric neurons. FcεRI immunoreactivities were observed in approximately 70% of cholinergic myenteric neurons from choline acetyltransferase-eGFP mice. Furthermore, stimulation by IgE-antigen elevated intracellular Ca2+ concentration in isolated myenteric neurons from normal mice, suggesting that FcεRIs are capable of activating myenteric neurons. Additionally, the morphological investigation revealed that the majority of mucosal mast cells were in close proximity to enteric nerve fibers in the colonic mucosa of food allergy mice. Next, using a newly developed coculture system of isolated myenteric neurons and mucosal-type bone-marrow-derived mast cells (mBMMCs) with a calcium imaging system, we demonstrated that the stimulation of isolated myenteric neurons by veratridine caused the activation of mBMMCs, which was suppressed by the adenosine A3 receptor antagonist MRE 3008F20. Moreover, the expression of the adenosine A3 receptor gene was detected in mBMMCs. Therefore, in conclusion, it is suggested that, through interaction with mucosal mast cells, IgE-antigen-activated myenteric neurons play a pathological role in further exacerbating the pathology of food allergy.
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Affiliation(s)
- Tomoe Yashiro
- Division of Gastrointestinal Pathophysiology, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan; (T.Y.); (H.O.); (S.F.Z.); (J.L.); (S.H.); (T.Y.)
| | - Hanako Ogata
- Division of Gastrointestinal Pathophysiology, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan; (T.Y.); (H.O.); (S.F.Z.); (J.L.); (S.H.); (T.Y.)
| | - Syed Faisal Zaidi
- Division of Gastrointestinal Pathophysiology, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan; (T.Y.); (H.O.); (S.F.Z.); (J.L.); (S.H.); (T.Y.)
- Department of Pharmacology, School of Medicine, Batterjee Medical College for Sciences and Technology, Jeddah 21442, Saudi Arabia
| | - Jaemin Lee
- Division of Gastrointestinal Pathophysiology, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan; (T.Y.); (H.O.); (S.F.Z.); (J.L.); (S.H.); (T.Y.)
| | - Shusaku Hayashi
- Division of Gastrointestinal Pathophysiology, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan; (T.Y.); (H.O.); (S.F.Z.); (J.L.); (S.H.); (T.Y.)
| | - Takeshi Yamamoto
- Division of Gastrointestinal Pathophysiology, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan; (T.Y.); (H.O.); (S.F.Z.); (J.L.); (S.H.); (T.Y.)
| | - Makoto Kadowaki
- Division of Gastrointestinal Pathophysiology, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan; (T.Y.); (H.O.); (S.F.Z.); (J.L.); (S.H.); (T.Y.)
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18
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Bhukya S, S S, S S, J A Q, A A, Rani N, K D, A D, Nag TC, A S. Morphological changes of the myenteric plexus at different gut segments of human fetuses. J Histotechnol 2021; 44:150-159. [PMID: 33441042 DOI: 10.1080/01478885.2020.1862604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The neural crest cell-derived enteric nervous system (ENS) is the intrinsic innervation of the gastrointestinal tract (GIT) which consists of neurons and enteric glia cells in the myenteric ganglia and forming plexus. The ENS consists mainly of submucosal and myenteric plexuses. It has various functions on the GIT, which include control of local blood flow, motility, mucosal transport, secretions, immune modulation as well as endocrine functions and coordinated contractile activity of smooth muscle. The knowledge on the development of the innervations at different segments of the gut in humans from 11 to 26 weeks of gestation (WG) may help in understanding the pathophysiology of various congenital diseases affecting the ENS. The aim of this study is to determine the morphology of the myenteric plexus in the esophagus, ascending colon and sigmoid colon at various weeks of gestation. Tissue samples from 10 naturally terminated fetuses aged 11-26 WG were processed for hematoxylin and eosin staining and immunohistochemistry assay. The neurons, enteric glia, the smooth muscle were visualized using PGP9.5, Vimentin and S-100 antibodies. The number of neurons and enteric glial cells appeared lowest in the esophagus than the ascending and sigmoid colon. The myenteric ganglion was closely apposed to each other, forming a continuous arch along the entire circumference of gut sections of ascending and sigmoid colon but the myenteric ganglia in the esophagus was thinly populated and widely spread in the fetus at 13 WG. As the fetal gastrointestinal tract grew in diameter and length, the myenteric ganglia became discernible.
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Affiliation(s)
- Subhash Bhukya
- Department of Anatomy, Armed Forces Medical College, Pune, India
| | - Singh S
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India
| | - Sarwar S
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India
| | - Quadri J A
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India
| | - Ahmed A
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India
| | - Neerja Rani
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India
| | - Dheeraj K
- Department of Anatomy, Viswabharathi Medical College, Kurnool, India
| | - Dubey A
- Department of Anatomy, Hindu Rao Medical Sciences, Delhi, India
| | - Tapas Chandra Nag
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India
| | - Shariff A
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India
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19
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Abstract
The primary functions of the gastrointestinal (GI) tract are to absorb nutrients, water, and electrolytes that are essential for life. This is accompanied by the capability of the GI tract to mix ingested content to maximize absorption and effectively excrete waste material. There have been major advances in understanding intrinsic neural mechanisms involved in GI motility. This review highlights major advances over the past few decades in our understanding of colonic motor complexes (CMCs), the major intrinsic neural patterns that control GI motility. CMCs are generated by rhythmic coordinated firing of large populations of myenteric neurons. Initially, it was thought that serotonin release from the mucosa was required for CMC generation. However, careful experiments have now shown that neither the mucosa nor endogenous serotonin are required, although, evidence suggests enteroendocrine (EC) cells modulate CMCs. The frequency and extent of propagation of CMCs are highly dependent on mechanical stimuli (circumferential stretch). In summary, the isolated mouse colon emerges as a good model to investigate intrinsic mechanisms underlying colonic motility and provides an excellent preparation to explore potential therapeutic agents on colonic motility, in a highly controlled in vitro environment. In addition, during CMCs, the mouse colon facilitates investigations into the emergence of dynamic assemblies of extensive neural networks, applicable to the nervous system of different organisms.
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Affiliation(s)
- N J Spencer
- Visceral Neurophysiology Laboratory, College of Medicine and Public Health, Centre for Neuroscience, Flinders University, Bedford Park, South Australia, Australia
| | - M Costa
- Visceral Neurophysiology Laboratory, College of Medicine and Public Health, Centre for Neuroscience, Flinders University, Bedford Park, South Australia, Australia
| | - T J Hibberd
- Visceral Neurophysiology Laboratory, College of Medicine and Public Health, Centre for Neuroscience, Flinders University, Bedford Park, South Australia, Australia
| | - J D Wood
- Department of Physiology and Cell Biology, College of Medicine, The Ohio State University, Columbus, Ohio
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20
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Drokhlyansky E, Smillie CS, Van Wittenberghe N, Ericsson M, Griffin GK, Eraslan G, Dionne D, Cuoco MS, Goder-Reiser MN, Sharova T, Kuksenko O, Aguirre AJ, Boland GM, Graham D, Rozenblatt-Rosen O, Xavier RJ, Regev A. The Human and Mouse Enteric Nervous System at Single-Cell Resolution. Cell 2020; 182:1606-1622.e23. [PMID: 32888429 PMCID: PMC8358727 DOI: 10.1016/j.cell.2020.08.003] [Citation(s) in RCA: 242] [Impact Index Per Article: 60.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 06/15/2020] [Accepted: 07/31/2020] [Indexed: 12/21/2022]
Abstract
The enteric nervous system (ENS) coordinates diverse functions in the intestine but has eluded comprehensive molecular characterization because of the rarity and diversity of cells. Here we develop two methods to profile the ENS of adult mice and humans at single-cell resolution: RAISIN RNA-seq for profiling intact nuclei with ribosome-bound mRNA and MIRACL-seq for label-free enrichment of rare cell types by droplet-based profiling. The 1,187,535 nuclei in our mouse atlas include 5,068 neurons from the ileum and colon, revealing extraordinary neuron diversity. We highlight circadian expression changes in enteric neurons, show that disease-related genes are dysregulated with aging, and identify differences between the ileum and proximal/distal colon. In humans, we profile 436,202 nuclei, recovering 1,445 neurons, and identify conserved and species-specific transcriptional programs and putative neuro-epithelial, neuro-stromal, and neuro-immune interactions. The human ENS expresses risk genes for neuropathic, inflammatory, and extra-intestinal diseases, suggesting neuronal contributions to disease.
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MESH Headings
- Aging/genetics
- Aging/metabolism
- Animals
- Circadian Clocks/genetics
- Colon/cytology
- Colon/metabolism
- Endoplasmic Reticulum, Rough/genetics
- Endoplasmic Reticulum, Rough/metabolism
- Endoplasmic Reticulum, Rough/ultrastructure
- Enteric Nervous System/cytology
- Enteric Nervous System/metabolism
- Epithelial Cells/metabolism
- Female
- Gene Expression Regulation, Developmental/genetics
- Genetic Predisposition to Disease/genetics
- Humans
- Ileum/cytology
- Ileum/metabolism
- Inflammation/genetics
- Inflammation/metabolism
- Intestinal Diseases/genetics
- Intestinal Diseases/metabolism
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Transgenic
- Microscopy, Electron, Transmission
- Nervous System Diseases/genetics
- Nervous System Diseases/metabolism
- Neuroglia/cytology
- Neuroglia/metabolism
- Neurons/cytology
- Neurons/metabolism
- Nissl Bodies/genetics
- Nissl Bodies/metabolism
- Nissl Bodies/ultrastructure
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- RNA-Seq
- Ribosomes/metabolism
- Ribosomes/ultrastructure
- Single-Cell Analysis/methods
- Stromal Cells/metabolism
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Affiliation(s)
- Eugene Drokhlyansky
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | | | | | - Maria Ericsson
- Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Gabriel K Griffin
- Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Pathology, Brigham and Women's Hospital, Boston, MA, USA
| | - Gokcen Eraslan
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Danielle Dionne
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Michael S Cuoco
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | | | | | - Olena Kuksenko
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Andrew J Aguirre
- Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA, USA
| | - Genevieve M Boland
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA, USA
| | - Daniel Graham
- Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Molecular Biology, Massachusetts General Hospital, Boston, MA, USA; Gastrointestinal Unit and Center for the Study of Inflammatory Bowel Disease, Massachusetts General Hospital, Boston, MA, USA
| | | | - Ramnik J Xavier
- Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Molecular Biology, Massachusetts General Hospital, Boston, MA, USA; Gastrointestinal Unit and Center for the Study of Inflammatory Bowel Disease, Massachusetts General Hospital, Boston, MA, USA; Center for Computational and Integrative Biology, Massachusetts General Hospital, Boston, MA, USA.
| | - Aviv Regev
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA; Howard Hughes Medical Institute and Koch Institute for Integrative Cancer Research, Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA.
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21
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Stakenborg N, Labeeuw E, Gomez-Pinilla PJ, De Schepper S, Aerts R, Goverse G, Farro G, Appeltans I, Meroni E, Stakenborg M, Viola MF, Gonzalez-Dominguez E, Bosmans G, Alpizar YA, Wolthuis A, D’Hoore A, Van Beek K, Verheijden S, Verhaegen M, Derua R, Waelkens E, Moretti M, Gotti C, Augustijns P, Talavera K, Vanden Berghe P, Matteoli G, Boeckxstaens GE. Preoperative administration of the 5-HT4 receptor agonist prucalopride reduces intestinal inflammation and shortens postoperative ileus via cholinergic enteric neurons. Gut 2019; 68:1406-1416. [PMID: 30472681 PMCID: PMC6691854 DOI: 10.1136/gutjnl-2018-317263] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [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: 07/27/2018] [Revised: 10/16/2018] [Accepted: 10/18/2018] [Indexed: 12/27/2022]
Abstract
OBJECTIVES Vagus nerve stimulation (VNS), most likely via enteric neurons, prevents postoperative ileus (POI) by reducing activation of alpha7 nicotinic receptor (α7nAChR) positive muscularis macrophages (mMφ) and dampening surgery-induced intestinal inflammation. Here, we evaluated if 5-HT4 receptor (5-HT4R) agonist prucalopride can mimic this effect in mice and human. DESIGN Using Ca2+ imaging, the effect of electrical field stimulation (EFS) and prucalopride was evaluated in situ on mMφ activation evoked by ATP in jejunal muscularis tissue. Next, preoperative and postoperative administration of prucalopride (1-5 mg/kg) was compared with that of preoperative VNS in a model of POI in wild-type and α7nAChR knockout mice. Finally, in a pilot study, patients undergoing a Whipple procedure were preoperatively treated with prucalopride (n=10), abdominal VNS (n=10) or sham/placebo (n=10) to evaluate the effect on intestinal inflammation and clinical recovery of POI. RESULTS EFS reduced the ATP-induced Ca2+ response of mMφ, an effect that was dampened by neurotoxins tetrodotoxin and ω-conotoxin and mimicked by prucalopride. In vivo, prucalopride administered before, but not after abdominal surgery reduced intestinal inflammation and prevented POI in wild-type, but not in α7nAChR knockout mice. In humans, preoperative administration of prucalopride, but not of VNS, decreased Il6 and Il8 expression in the muscularis externa and improved clinical recovery. CONCLUSION Enteric neurons dampen mMφ activation, an effect mimicked by prucalopride. Preoperative, but not postoperative treatment with prucalopride prevents intestinal inflammation and shortens POI in both mice and human, indicating that preoperative administration of 5-HT4R agonists should be further evaluated as a treatment of POI. TRIAL REGISTRATION NUMBER NCT02425774.
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Affiliation(s)
- Nathalie Stakenborg
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
| | - Evelien Labeeuw
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
| | - Pedro J Gomez-Pinilla
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
| | - Sebastiaan De Schepper
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
| | - Raymond Aerts
- Department of Abdominal Surgery, University Hospital of Leuven, Leuven, Belgium
| | - Gera Goverse
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for Gastrointestinal Disorders, Laboratory for Mucosal Immunology, University of Leuven, Leuven, Belgium
| | - Giovanna Farro
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
| | - Iris Appeltans
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
| | - Elisa Meroni
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
| | - Michelle Stakenborg
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for Gastrointestinal Disorders, Laboratory for Mucosal Immunology, University of Leuven, Leuven, Belgium
| | - Maria Francesca Viola
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
| | - Erika Gonzalez-Dominguez
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
| | - Goele Bosmans
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
| | - Yeranddy A Alpizar
- Department of Cellular and Molecular Medicine, Laboratory of Ion Channel Research, KU Leuven; VIB Center for Brain & Disease Research, Leuven, Belgium
| | - Albert Wolthuis
- Department of Abdominal Surgery, University Hospital of Leuven, Leuven, Belgium
| | - Andre D’Hoore
- Department of Abdominal Surgery, University Hospital of Leuven, Leuven, Belgium
| | - Kim Van Beek
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
| | - Simon Verheijden
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
| | - Marleen Verhaegen
- Department of Anesthesiology, University Hospital of Leuven, Leuven, Belgium
| | - Rita Derua
- Department of Cellular and Molecular Medicine, Laboratory of Protein Phosphorylation and Proteomics, Universitiy of Leuven, Leuven, Belgium
| | - Etienne Waelkens
- Department of Cellular and Molecular Medicine, Laboratory of Protein Phosphorylation and Proteomics, Universitiy of Leuven, Leuven, Belgium
| | - Milena Moretti
- CNR, Neuroscience Institute-Milano, Biometra University of Milan, Milan, Italy
| | - Cecilia Gotti
- CNR, Neuroscience Institute-Milano, Biometra University of Milan, Milan, Italy
| | - Patrick Augustijns
- Department of Pharmaceutical and Pharmacological Sciences, Laboratory for Drug Delivery and Disposition, University of Leuven, Leuven, Belgium
| | - Karel Talavera
- Department of Cellular and Molecular Medicine, Laboratory of Ion Channel Research, KU Leuven; VIB Center for Brain & Disease Research, Leuven, Belgium
| | - Pieter Vanden Berghe
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for Gastrointestinal Disorders, Laboratory for Enteric Neuroscience, University of Leuven, Leuven, Belgium
| | - Gianluca Matteoli
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for Gastrointestinal Disorders, Laboratory for Mucosal Immunology, University of Leuven, Leuven, Belgium
| | - Guy E Boeckxstaens
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
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22
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Boesmans W, Hao MM, Fung C, Li Z, Van den Haute C, Tack J, Pachnis V, Vanden Berghe P. Structurally defined signaling in neuro-glia units in the enteric nervous system. Glia 2019; 67:1167-1178. [PMID: 30730592 PMCID: PMC6593736 DOI: 10.1002/glia.23596] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [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: 08/10/2018] [Revised: 01/11/2019] [Accepted: 01/11/2019] [Indexed: 12/21/2022]
Abstract
Coordination of gastrointestinal function relies on joint efforts of enteric neurons and glia, whose crosstalk is vital for the integration of their activity. To investigate the signaling mechanisms and to delineate the spatial aspects of enteric neuron-to-glia communication within enteric ganglia we developed a method to stimulate single enteric neurons while monitoring the activity of neighboring enteric glial cells. We combined cytosolic calcium uncaging of individual enteric neurons with calcium imaging of enteric glial cells expressing a genetically encoded calcium indicator and demonstrate that enteric neurons signal to enteric glial cells through pannexins using paracrine purinergic pathways. Sparse labeling of enteric neurons and high-resolution analysis of the structural relation between neuronal cell bodies, varicose release sites and enteric glia uncovered that this form of neuron-to-glia communication is contained between the cell body of an enteric neuron and its surrounding enteric glial cells. Our results reveal the spatial and functional foundation of neuro-glia units as an operational cellular assembly in the enteric nervous system.
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Affiliation(s)
- Werend Boesmans
- Laboratory for Enteric NeuroScience (LENS), Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium.,Department of Pathology, GROW-School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, The Netherlands.,Biomedical Research Institute (BIOMED), Hasselt University, Hasselt, Belgium
| | - Marlene M Hao
- Laboratory for Enteric NeuroScience (LENS), Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium.,Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Australia
| | - Candice Fung
- Laboratory for Enteric NeuroScience (LENS), Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
| | - Zhiling Li
- Laboratory for Enteric NeuroScience (LENS), Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
| | - Chris Van den Haute
- Laboratory for Neurobiology and Gene Therapy, Department of Neurosciences, University of Leuven, Leuven, Belgium.,Leuven Viral Vector Core, University of Leuven, Leuven, Belgium
| | - Jan Tack
- Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
| | - Vassilis Pachnis
- Development and Homeostasis of the Nervous System Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Pieter Vanden Berghe
- Laboratory for Enteric NeuroScience (LENS), Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
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23
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Hu H, Ding Y, Mu W, Li Y, Wang Y, Jiang W, Fu Y, Tou J, Chen W. DRG-Derived Neural Progenitors Differentiate into Functional Enteric Neurons Following Transplantation in the Postnatal Colon. Cell Transplant 2018; 28:157-169. [PMID: 30442032 PMCID: PMC6362519 DOI: 10.1177/0963689718811061] [Citation(s) in RCA: 5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Cell therapy has great promise for treating gastrointestinal motility disorders caused by intestinal nervous system (ENS) diseases. However, appropriate sources, other than enteric neural stem cells and human embryonic stem cells, are seldom reported. Here, we show that neural progenitors derived from the dorsal root ganglion (DRG) of EGFP mice survived, differentiated into enteric neurons and glia cells, migrated widely from the site of injection, and established neuron-muscle connections following transplantation into the distal colon of postnatal mice. The exogenous EGFP+ neurons were physiologically functional as shown by the activity of calcium imaging. This study shows that that other tissues besides the postnatal bowel harbor neural crest stem cells or neural progenitors that have the potential to differentiate into functional enteric neurons in vivo and can potentially be used for intestinal nerve regeneration. These DRG-derived neural progenitor cells may be a choice for cell therapy of ENS disease as an allograft. The new knowledge provided by our study is important for the development of neural crest stem cell and cell therapy for the treatment of intestinal neuropathy.
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Affiliation(s)
- Hui Hu
- 1 Children's Hospital Affiliated and Key Laboratory of Diagnosis and Treatment of Neonatal Diseases of Zhejiang Province, School of Medicine, Zhejiang University, China.,2 Institute of Translational Medicine, School of Medicine, Zhejiang University, China
| | - Yuanyuan Ding
- 1 Children's Hospital Affiliated and Key Laboratory of Diagnosis and Treatment of Neonatal Diseases of Zhejiang Province, School of Medicine, Zhejiang University, China.,2 Institute of Translational Medicine, School of Medicine, Zhejiang University, China
| | - Wenbo Mu
- 1 Children's Hospital Affiliated and Key Laboratory of Diagnosis and Treatment of Neonatal Diseases of Zhejiang Province, School of Medicine, Zhejiang University, China.,2 Institute of Translational Medicine, School of Medicine, Zhejiang University, China
| | - Ying Li
- 1 Children's Hospital Affiliated and Key Laboratory of Diagnosis and Treatment of Neonatal Diseases of Zhejiang Province, School of Medicine, Zhejiang University, China.,2 Institute of Translational Medicine, School of Medicine, Zhejiang University, China
| | - Yanpeng Wang
- 3 Department of Gynecology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, China
| | - Weifang Jiang
- 4 Department of Neonatal Surgery, Children's Hospital, School of Medicine, Zhejiang University, China
| | - Yong Fu
- 1 Children's Hospital Affiliated and Key Laboratory of Diagnosis and Treatment of Neonatal Diseases of Zhejiang Province, School of Medicine, Zhejiang University, China.,5 Otolaryngological Department, Children's Hospital, School of Medicine, Zhejiang University, China
| | - Jinfa Tou
- 1 Children's Hospital Affiliated and Key Laboratory of Diagnosis and Treatment of Neonatal Diseases of Zhejiang Province, School of Medicine, Zhejiang University, China.,4 Department of Neonatal Surgery, Children's Hospital, School of Medicine, Zhejiang University, China
| | - Wei Chen
- 1 Children's Hospital Affiliated and Key Laboratory of Diagnosis and Treatment of Neonatal Diseases of Zhejiang Province, School of Medicine, Zhejiang University, China.,2 Institute of Translational Medicine, School of Medicine, Zhejiang University, China.,6 Department of Neurobiology, Key Laboratory of Medical Neurobiology of Ministry of Health of China, School of Medicine, Zhejiang University, China
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24
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Ganz J. Gut feelings: Studying enteric nervous system development, function, and disease in the zebrafish model system. Dev Dyn 2018; 247:268-278. [PMID: 28975691 DOI: 10.1002/dvdy.24597] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 07/14/2017] [Accepted: 09/15/2017] [Indexed: 12/15/2022] Open
Abstract
The enteric nervous system (ENS) is the largest part of the peripheral nervous system and is entirely neural crest-derived. It provides the intrinsic innervation of the gut, controlling different aspects of gut function, such as motility. In this review, we will discuss key points of Zebrafish ENS development, genes, and signaling pathways regulating ENS development, as well as contributions of the Zebrafish model system to better understand ENS disorders. During their migration, enteric progenitor cells (EPCs) display a gradient of developmental states based on their proliferative and migratory characteristics, and show spatiotemporal heterogeneity based on gene expression patterns. Many genes and signaling pathways that regulate the migration and proliferation of EPCs have been identified, but later stages of ENS development, especially steps of neuronal and glial differentiation, remain poorly understood. In recent years, Zebrafish have become increasingly important to test candidate genes for ENS disorders (e.g., from genome-wide association studies), to identify environmental influences on ENS development (e.g., through large-scale drug screens), and to investigate the role the gut microbiota play in ENS development and disease. With its unique advantages as a model organism, Zebrafish will continue to contribute to a better understanding of ENS development, function, and disease. Developmental Dynamics 247:268-278, 2018. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Julia Ganz
- Department of Integrative Biology, Michigan State University, East Lansing, Michigan
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25
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Taylor CR, Montagne WA, Eisen JS, Ganz J. Molecular fingerprinting delineates progenitor populations in the developing zebrafish enteric nervous system. Dev Dyn 2016; 245:1081-1096. [PMID: 27565577 DOI: 10.1002/dvdy.24438] [Citation(s) in RCA: 18] [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: 01/05/2016] [Revised: 07/01/2016] [Accepted: 07/29/2016] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND To understand the basis of nervous system development, we must learn how multipotent progenitors generate diverse neuronal and glial lineages. We addressed this issue in the zebrafish enteric nervous system (ENS), a complex neuronal and glial network that regulates essential intestinal functions. Little is currently known about how ENS progenitor subpopulations generate enteric neuronal and glial diversity. RESULTS We identified temporally and spatially dependent progenitor subpopulations based on coexpression of three genes essential for normal ENS development: phox2bb, sox10, and ret. Our data suggest that combinatorial expression of these genes delineates three major ENS progenitor subpopulations, (1) phox2bb + /ret- /sox10-, (2) phox2bb + /ret + /sox10-, and (3) phox2bb + /ret + /sox10+, that reflect temporal progression of progenitor maturation during migration. We also found that differentiating zebrafish neurons maintain phox2bb and ret expression, and lose sox10 expression. CONCLUSIONS Our data show that zebrafish enteric progenitors constitute a heterogeneous population at both early and late stages of ENS development and suggest that marker gene expression is indicative of a progenitor's fate. We propose that a progenitor's expression profile reveals its developmental state: "younger" wave front progenitors express all three genes, whereas more mature progenitors behind the wave front selectively lose sox10 and/or ret expression, which may indicate developmental restriction. Developmental Dynamics 245:1081-1096, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Charlotte R Taylor
- Institute of Neuroscience, 1254 University of Oregon, Eugene, OR 97403-1254, USA
| | - William A Montagne
- Institute of Neuroscience, 1254 University of Oregon, Eugene, OR 97403-1254, USA
| | - Judith S Eisen
- Institute of Neuroscience, 1254 University of Oregon, Eugene, OR 97403-1254, USA
| | - Julia Ganz
- Institute of Neuroscience, 1254 University of Oregon, Eugene, OR 97403-1254, USA. .,Current address: Department of Integrative Biology, Michigan State University, East Lansing, MI 48824, USA.
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26
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Lowette K, Desmet AS, Farré RM, Tack J, Vanden Berghe P. Fructose consumption impairs serotonergic signaling in the murine enteric nervous system. Neurogastroenterol Motil 2016; 28:1438-42. [PMID: 27098706 DOI: 10.1111/nmo.12827] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 12/16/2015] [Accepted: 03/03/2016] [Indexed: 02/08/2023]
Abstract
The intake of free fructose has increased substantially since the development of high-fructose corn syrup. This has not only been associated with metabolic disorders but recent evidence also indicates that chronic fructose consumption can affect neuronal and cognitive function. In this study we investigated the effects of fructose consumption on serotonergic signaling and neuronal activity in the mouse submucous plexus. Male mice were put on a control or fructose (23% solution) diet for 6 weeks or were assigned to a recovery group that received normal water (2 weeks) after 4 weeks of fructose. At the end of the diet, gene expressions and enteric neuronal activity, after depolarization with high K(+) and 5-HT, were measured using Ca(2+) imaging and RT-qPCR, respectively. Even in the lack of gain weight and the absence of changes in duodenal permeability, the total number of 5-HT-responding neurons and the depolarization and 5-HT-evoked Ca(2+) amplitudes were significantly lower after fructose consumption. Expression of synaptobrevin CaV 2.1 and CaV 2.2 mRNA did not differ after fructose intake; however, CaV 2.1 mRNA levels were significantly higher in the recovery animals. SERT mRNA concentration, isolated from submucosal plexus containing mucosal epithelium, was significantly decreased after fructose consumption. Chronic fructose consumption impairs serotonergic signaling in the mouse submucous plexus, prior to weight gain and detectable intestinal permeability problems.
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Affiliation(s)
- K Lowette
- Laboratory for Enteric NeuroScience (LENS), University of Leuven, Leuven, Belgium
- Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
| | - A-S Desmet
- Laboratory for Enteric NeuroScience (LENS), University of Leuven, Leuven, Belgium
- Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
| | - R M Farré
- Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
| | - J Tack
- Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
| | - P Vanden Berghe
- Laboratory for Enteric NeuroScience (LENS), University of Leuven, Leuven, Belgium
- Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
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27
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Korogod SM, Osorio N, Kulagina IB, Delmas P. Dynamic excitation states and firing patterns are controlled by sodium channel kinetics in my enteric neurons: a simulation study. Channels (Austin) 2015; 8:536-43. [PMID: 25616688 DOI: 10.4161/19336950.2014.973784] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Enteric neurons located in the gastro-intestinal tract are of particular importance to control digestive functions such as motility and secretion. In our recent publication, we showed that mouse myenteric neurons exhibit 2 types of tetrodotoxin-resistant Na(+) currents: a fast inactivating Na(+) current produced by Nav1.5 channels, present in nearly all myenteric neurons, and a persistent Na(+) current attributed to Nav1.9 channels, restricted to the intrinsic primary afferent neurons (IPANs). By combination of experimental recording and computer simulation we found that Nav1.5 contributed to the upstroke velocity of action potentials (APs), whereas Nav1.9 opposed AP repolarization. Here, we detailed the Na(+), Ca(2+) and K(+) currents used in our computational model of IPAN. We refined the prototype cell to reproduce the sustained firing pattern recorded in situ. As shown in experimental conditions we demonstrated that Nav1.9 channels critically determine the up-state life-time and thus, are essential to sustain tonic firing.
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Affiliation(s)
- Sergiy M Korogod
- a International Center for Molecular Physiology (Dnipropetrovsk Division); National Academy of Sciences of Ukraine ; Kiev , Ukraine
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28
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Goto K, Kawahara I, Kuniyasu H, Takaki M. A protein tyrosine kinase receptor, c-RET signaling pathway contributes to the enteric neurogenesis induced by a 5-HT4 receptor agonist at an anastomosis after transection of the gut in rodents. J Physiol Sci 2015; 65:377-83. [PMID: 25850922 PMCID: PMC10717718 DOI: 10.1007/s12576-015-0377-4] [Citation(s) in RCA: 5] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 03/19/2015] [Indexed: 02/07/2023]
Abstract
We previously reported that a serotonin 4 (5-HT4) receptor agonist, mosapride citrate (MOS), increased the number of c-RET-positive cells and levels of c-RET mRNA in gel sponge implanted in the necks of rats. The 5-HT4 receptor is a G protein coupled receptor (GPCR) coupled to G protein Gs-cAMP cascades. We investigated the possibility that 5-HT4 receptor activation induced c-RET activation and/or PKA activation by elevating cAMP levels. Rodents were orally administered MOS by adding it to drinking water for 2 weeks after enteric nerve circuit insult via gut transection and anastomosis, together with the RET inhibitors withaferin A (WA) and RPI-1 or the PKA inhibitor H89. We then examined PGP9.5-positive cells in the newly formed granulation tissue at the anastomotic site. MOS significantly increased the number of new neurons, but not when co-administered with WA or RPI-1. Co-administration of H89 failed to alter MOS-induced increases in neurogenesis. In conclusion, the c-RET signaling pathway contributes to enteric neurogenesis facilitated by MOS, though the contribution of PKA activation seems unlikely.
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Affiliation(s)
- Kei Goto
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-cho, Kashihara, Nara 634-8521 Japan
| | - Isao Kawahara
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-cho, Kashihara, Nara 634-8521 Japan
| | - Hiroki Kuniyasu
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-cho, Kashihara, Nara 634-8521 Japan
| | - Miyako Takaki
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-cho, Kashihara, Nara 634-8521 Japan
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29
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Jin S, Martinelli DC, Zheng X, Tessier-Lavigne M, Fan CM. Gas1 is a receptor for sonic hedgehog to repel enteric axons. Proc Natl Acad Sci U S A 2015; 112:E73-80. [PMID: 25535338 DOI: 10.1073/pnas.1418629112] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The myenteric plexus of the enteric nervous system controls the movement of smooth muscles in the gastrointestinal system. They extend their axons between two peripheral smooth muscle layers to form a tubular meshwork arborizing the gut wall. How a tubular axonal meshwork becomes established without invading centrally toward the gut epithelium has not been addressed. We provide evidence here that sonic hedgehog (Shh) secreted from the gut epithelium prevents central projections of enteric axons, thereby forcing their peripheral tubular distribution. Exclusion of enteric central projections by Shh requires its binding partner growth arrest specific gene 1 (Gas1) and its signaling component smoothened (Smo) in enteric neurons. Using enteric neurons differentiated from neurospheres in vitro, we show that enteric axon growth is not inhibited by Shh. Rather, when Shh is presented as a point source, enteric axons turn away from it in a Gas1-dependent manner. Of the Gαi proteins that can couple with Smo, G protein α Z (Gnaz) is found in enteric axons. Knockdown and dominant negative inhibition of Gnaz dampen the axon-repulsive response to Shh, and Gnaz mutant intestines contain centrally projected enteric axons. Together, our data uncover a previously unsuspected mechanism underlying development of centrifugal tubular organization and identify a previously unidentified effector of Shh in axon guidance.
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30
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Findlay Q, Yap KK, Bergner AJ, Young HM, Stamp LA. Enteric neural progenitors are more efficient than brain-derived progenitors at generating neurons in the colon. Am J Physiol Gastrointest Liver Physiol 2014; 307:G741-8. [PMID: 25125684 DOI: 10.1152/ajpgi.00225.2014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [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: 01/31/2023]
Abstract
Gut motility disorders can result from an absent, damaged, or dysfunctional enteric nervous system (ENS). Cell therapy is an exciting prospect to treat these enteric neuropathies and restore gut motility. Previous studies have examined a variety of sources of stem/progenitor cells, but the ability of different sources of cells to generate enteric neurons has not been directly compared. It is important to identify the source of stem/progenitor cells that is best at colonizing the bowel and generating neurons following transplantation. The aim of this study was to compare the ability of central nervous system (CNS) progenitors and ENS progenitors to colonize the colon and differentiate into neurons. Genetically labeled CNS- and ENS-derived progenitors were cocultured with aneural explants of embryonic mouse colon for 1 or 2.5 wk to assess their migratory, proliferative, and differentiation capacities, and survival, in the embryonic gut environment. Both progenitor cell populations were transplanted in the postnatal colon of mice in vivo for 4 wk before they were analyzed for migration and differentiation using immunohistochemistry. ENS-derived progenitors migrated further than CNS-derived cells in both embryonic and postnatal gut environments. ENS-derived progenitors also gave rise to more neurons than their CNS-derived counterparts. Furthermore, neurons derived from ENS progenitors clustered together in ganglia, whereas CNS-derived neurons were mostly solitary. We conclude that, within the gut environment, ENS-derived progenitors show superior migration, proliferation, and neuronal differentiation compared with CNS progenitors.
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Affiliation(s)
- Quan Findlay
- Department of Anatomy and Neuroscience, University of Melbourne, Parkville, Victoria, Australia
| | - Kiryu K Yap
- Department of Anatomy and Neuroscience, University of Melbourne, Parkville, Victoria, Australia
| | - Annette J Bergner
- Department of Anatomy and Neuroscience, University of Melbourne, Parkville, Victoria, Australia
| | - Heather M Young
- Department of Anatomy and Neuroscience, University of Melbourne, Parkville, Victoria, Australia
| | - Lincon A Stamp
- Department of Anatomy and Neuroscience, University of Melbourne, Parkville, Victoria, Australia
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Boesmans W, Martens MA, Weltens N, Hao MM, Tack J, Cirillo C, Vanden Berghe P. Imaging neuron-glia interactions in the enteric nervous system. Front Cell Neurosci 2013; 7:183. [PMID: 24155689 PMCID: PMC3801083 DOI: 10.3389/fncel.2013.00183] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [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: 08/31/2013] [Accepted: 10/01/2013] [Indexed: 12/13/2022] Open
Abstract
The enteric nervous system (ENS) is a network of neurons and glia within the wall of the gastrointestinal tract that is able to control many aspects of digestive function independently from the central nervous system. Enteric glial cells share several features with astrocytes and are closely associated with enteric neurons and their processes both within enteric ganglia, and along interconnecting fiber bundles. Similar to other parts of the nervous system, there is communication between enteric neurons and glia; enteric glial cells can detect neuronal activity and have the machinery to intermediate neurotransmission. However, due to the close contact between these two cell types and the particular characteristics of the gut wall, the recording of enteric glial cell activity in live imaging experiments, especially in the context of their interaction with neurons, is not straightforward. Most studies have used calcium imaging approaches to examine enteric glial cell activity but in many cases, it is difficult to distinguish whether observed transients arise from glial cells, or neuronal processes or varicosities in their vicinity. In this technical report, we describe a number of approaches to unravel the complex neuron-glia crosstalk in the ENS, focusing on the challenges and possibilities of live microscopic imaging in both animal models and human tissue samples.
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Affiliation(s)
- Werend Boesmans
- Laboratory for Enteric NeuroScience (LENS), Translational Research Center for GastroIntestinal Disorders, University of Leuven , Leuven, Belgium ; Translational Research Center for GastroIntestinal Disorders (TARGID), Department of Clinical and Experimental Medicine, University of Leuven , Leuven, Belgium
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