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Sharkey KA, Mawe GM. The enteric nervous system. Physiol Rev 2023; 103:1487-1564. [PMID: 36521049 PMCID: PMC9970663 DOI: 10.1152/physrev.00018.2022] [Citation(s) in RCA: 58] [Impact Index Per Article: 58.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 12/12/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022] Open
Abstract
Of all the organ systems in the body, the gastrointestinal tract is the most complicated in terms of the numbers of structures involved, each with different functions, and the numbers and types of signaling molecules utilized. The digestion of food and absorption of nutrients, electrolytes, and water occurs in a hostile luminal environment that contains a large and diverse microbiota. At the core of regulatory control of the digestive and defensive functions of the gastrointestinal tract is the enteric nervous system (ENS), a complex system of neurons and glia in the gut wall. In this review, we discuss 1) the intrinsic neural control of gut functions involved in digestion and 2) how the ENS interacts with the immune system, gut microbiota, and epithelium to maintain mucosal defense and barrier function. We highlight developments that have revolutionized our understanding of the physiology and pathophysiology of enteric neural control. These include a new understanding of the molecular architecture of the ENS, the organization and function of enteric motor circuits, and the roles of enteric glia. We explore the transduction of luminal stimuli by enteroendocrine cells, the regulation of intestinal barrier function by enteric neurons and glia, local immune control by the ENS, and the role of the gut microbiota in regulating the structure and function of the ENS. Multifunctional enteric neurons work together with enteric glial cells, macrophages, interstitial cells, and enteroendocrine cells integrating an array of signals to initiate outputs that are precisely regulated in space and time to control digestion and intestinal homeostasis.
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Affiliation(s)
- Keith A Sharkey
- Hotchkiss Brain Institute and Snyder Institute for Chronic Diseases, Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Gary M Mawe
- Department of Neurological Sciences, Larner College of Medicine, University of Vermont, Burlington, Vermont
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2
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An ultrasonographic assisted investigation for the enhancement of duodenal/cecal motility of mosapride through a surfactant-based triple solid dispersion: In-vitro, in-vivo assessment of tablet formulation. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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3
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Bodnar B, DeGruttola A, Zhu Y, Lin Y, Zhang Y, Mo X, Hu W. Emerging role of NIK/IKK2-binding protein (NIBP)/trafficking protein particle complex 9 (TRAPPC9) in nervous system diseases. Transl Res 2020; 224:55-70. [PMID: 32434006 PMCID: PMC7442628 DOI: 10.1016/j.trsl.2020.05.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 05/02/2020] [Accepted: 05/05/2020] [Indexed: 02/05/2023]
Abstract
NFκB signaling and protein trafficking network play important roles in various biological and pathological processes. NIK-and-IKK2-binding protein (NIBP), also known as trafficking protein particle complex 9 (TRAPPC9), is a prototype member of a novel protein family, and has been shown to regulate both NFκB signaling pathway and protein transport/trafficking. NIBP is extensively expressed in the nervous system and plays an important role in regulating neurogenesis and neuronal differentiation. NIBP/TRAPPC9 mutations have been linked to an autosomal recessive intellectual disability syndrome, called NIBP Syndrome, which is characterized by nonsyndromic autosomal recessive intellectual disability along with other symptoms such as obesity, microcephaly, and facial dysmorphia. As more cases of NIBP Syndrome are identified, new light is being shed on the role of NIBP/TRAPPC9 in the central nervous system developments and diseases. NIBP is also involved in the enteric nervous system. This review will highlight the importance of NIBP/TRAPPC9 in central and enteric nervous system diseases, and the established possible mechanisms for developing a potential therapeutic.
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Affiliation(s)
- Brittany Bodnar
- Center for Metabolic Disease Research, Temple University Lewis Katz School of Medicine, Philadelphia, Pennsylvania; MD/PhD and Biomedical Sciences Graduate Program, Temple University Lewis Katz School of Medicine, Philadelphia, Pennsylvania
| | - Arianna DeGruttola
- Center for Metabolic Disease Research, Temple University Lewis Katz School of Medicine, Philadelphia, Pennsylvania; MD/PhD and Biomedical Sciences Graduate Program, Temple University Lewis Katz School of Medicine, Philadelphia, Pennsylvania
| | - Yuanjun Zhu
- Center for Metabolic Disease Research, Temple University Lewis Katz School of Medicine, Philadelphia, Pennsylvania; Department of Pathology and Laboratory Medicine, Temple University Lewis Katz School of Medicine, Philadelphia, Pennsylvania; Department of Molecular and Cellular Pharmacology, Peking University School of Pharmaceutical Sciences, Beijing, China
| | - Yuan Lin
- Center for Metabolic Disease Research, Temple University Lewis Katz School of Medicine, Philadelphia, Pennsylvania; Department of Pathology and Laboratory Medicine, Temple University Lewis Katz School of Medicine, Philadelphia, Pennsylvania
| | - Yonggang Zhang
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC), Chengdu, China
| | - Xianming Mo
- Laboratory of Stem Cell Biology, State Key Laboratory of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu, China
| | - Wenhui Hu
- Center for Metabolic Disease Research, Temple University Lewis Katz School of Medicine, Philadelphia, Pennsylvania; MD/PhD and Biomedical Sciences Graduate Program, Temple University Lewis Katz School of Medicine, Philadelphia, Pennsylvania; Department of Pathology and Laboratory Medicine, Temple University Lewis Katz School of Medicine, Philadelphia, Pennsylvania.
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4
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Zhao Y, Ge X, Yu H, Kuil LE, Alves MM, Tian D, Huang Q, Chen X, Hofstra RMW, Gao Y. Inhibition of ROCK signaling pathway accelerates enteric neural crest cell-based therapy after transplantation in a rat hypoganglionic model. Neurogastroenterol Motil 2020; 32:e13895. [PMID: 32515097 DOI: 10.1111/nmo.13895] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 04/23/2020] [Accepted: 05/05/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND Hirschsprung's disease (HSCR) is a congenital gastrointestinal disorder, characterized by enteric ganglia absence in part or entire of the colon, due to abnormal colonization and migration of enteric neural crest cells (ENCCs) during development. Currently, besides surgery which is the main therapy for HSCR, the potential of stem cell-based transplantation was investigated as an alternative option. Although promising, it has limitations, including poor survival, differentiation, and migration of the grafted cells. We hypothesized that modulation of extracellular factors during transplantation could promote ENCCs proliferation and migration, leading to increased transplantation efficiency. Considering that the RhoA/ROCK pathway is highly involved in cytoskeletal dynamics and neurite growth, our study explored the effect of inhibition of this pathway to improve the success of ENCCs transplantation. METHODS Enteric neural crest cells were isolated from rat embryos and labeled with a GFP-tag. Cell viability, apoptosis, differentiation, and migration assays were performed with and without RhoA/ROCK inhibition. Labeled ENCCs were transplanted into the muscle layer of an induced hypoganglionic rat model followed by intraperitoneal injections of ROCK inhibitor. The transplanted segments were collected 3 weeks after for histological analysis. KEY RESULTS Our results showed that inhibition of ROCK increased viable cell number, differentiation, and migration of ENCCs in vitro. Moreover, transplantation of labeled ENCCs into the hypoganglionic model showed enhanced distribution of grafted ENCCs, upon treatment with ROCK inhibitor. CONCLUSIONS AND INFERENCES ROCK inhibitors influence ENCCs growth and migration in vitro and in vivo, and should be considered to improve the efficiency of ENCCs transplantation.
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Affiliation(s)
- Yuying Zhao
- Department of Pediatric Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Department of Clinical Genetics, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Xin Ge
- Department of Pediatric Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Hui Yu
- Department of Pediatric Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Laura E Kuil
- Department of Clinical Genetics, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Maria M Alves
- Department of Clinical Genetics, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Donghao Tian
- Department of Pediatric Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Qiang Huang
- Department of Pediatric Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Xinlin Chen
- Institute of Neurobiology, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Robert M W Hofstra
- Department of Clinical Genetics, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Ya Gao
- Department of Pediatric Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
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5
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Abstract
The gastrointestinal tract contains its own set of intrinsic neuroglial circuits - the enteric nervous system (ENS) - which detects and responds to diverse signals from the environment. Here, we address recent advances in the understanding of ENS development, including how neural-crest-derived progenitors migrate into and colonize the bowel, the formation of ganglionated plexuses and the molecular mechanisms of enteric neuronal and glial diversification. Modern lineage tracing and transcription-profiling technologies have produced observations that simultaneously challenge and affirm long-held beliefs about ENS development. We review many genetic and environmental factors that can alter ENS development and exert long-lasting effects on gastrointestinal function, and discuss how developmental defects in the ENS might account for some of the large burden of digestive disease.
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Affiliation(s)
- Meenakshi Rao
- Department of Pediatrics, Columbia University, New York, NY, USA
| | - Michael D Gershon
- Department of Pathology and Cell Biology, Columbia University, New York, NY, USA.
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6
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Qiao H, Wang YB, Gao YM, Bi LL. Prucalopride inhibits the glioma cells proliferation and induces autophagy via AKT-mTOR pathway. BMC Neurol 2018; 18:80. [PMID: 29866060 PMCID: PMC5985575 DOI: 10.1186/s12883-018-1083-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 05/28/2018] [Indexed: 12/31/2022] Open
Abstract
Backgrounds Glioma is the most fatal primary brain glioma in central nervous system mainly attributed to its high invasion. Prucalopride, a Serotonin-4 (5-HT4) receptor agonist, has been reported to regulate neurodevelopment. This study aimed to investigate the influence of the Prucalopride on glioma cells and unveil underlying mechanism. Methods In this study, glioma cells proliferation was evaluated by Cell counting kit-8 (CCK8). Wound healing and transwell assay were used to test cellular migration and invasion. Flow cytometry was utilized to determine cellular apoptosis rate. Apoptosis related markers, autophagy markers, and protein kinase B (AKT)-mammalian target of rapamycin (mTOR) pathway key molecules were detected using western blot assay. Results As a result, the proliferation, migration and invasiveness of glioma cells were impaired by Prucalopride treatment, the apoptosis rate of glioma cells was enhanced by Prucalopride stimulation, accompanied by the increased pro-apoptosis proteins Bax and Cleaved caspase-3 and decreased anti-apoptosis protein Bcl-2. Prucalopride significantly promoted autophagy by increased expression level of Beclin 1 and LC3-II, while decreased expression level of p62. Prucalopride administration resulted in obvious inhibitions of key molecules of AKT-mTOR pathway, including phosphorylated- (p-) AKT, p-mTOR and phosphorylated-ribosomal p70S6 kinase (p-P70S6K). Conclusions Taking together, these results indicate that Prucalopride may be likely to play an anti-tumor role in glioma cells, which suggests potential implications for glioma promising therapy alternation in the further clinics.
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Affiliation(s)
- Hong Qiao
- Department of General Affairs Section, Second Affiliated Hospital of Mudanjiang Medical University, Mudanjiang, Heilongjiang, 157009, People's Republic of China
| | - Yong-Bo Wang
- Department of Respiratory Medicine, Second Affiliated Hospital of Mudanjiang Medical University, Mudanjiang, Heilongjiang, 157009, People's Republic of China
| | - Yu-Mei Gao
- Department of Respiratory Medicine, Second Affiliated Hospital of Mudanjiang Medical University, Mudanjiang, Heilongjiang, 157009, People's Republic of China
| | - Li-Li Bi
- Department of Medical Instruments, Second Affiliated Hospital of Mudanjiang Medical University, Mudanjiang, Heilongjiang, 157009, People's Republic of China.
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7
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Mine Y, Itakura T, Oku S, Asada R, Shimizu I. DSP-6952, a novel 5-HT 4 receptor partial agonist, inhibits visceral hypersensitivity and ameliorates gastrointestinal dysfunction in experimental animals. Eur J Pharmacol 2018; 826:123-132. [DOI: 10.1016/j.ejphar.2018.02.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 02/07/2018] [Accepted: 02/07/2018] [Indexed: 01/28/2023]
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8
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Hirschsprung disease - integrating basic science and clinical medicine to improve outcomes. Nat Rev Gastroenterol Hepatol 2018; 15:152-167. [PMID: 29300049 DOI: 10.1038/nrgastro.2017.149] [Citation(s) in RCA: 160] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Hirschsprung disease is defined by the absence of enteric neurons at the end of the bowel. The enteric nervous system (ENS) is the intrinsic nervous system of the bowel and regulates most aspects of bowel function. When the ENS is missing, there are no neurally mediated propulsive motility patterns, and the bowel remains contracted, causing functional obstruction. Symptoms of Hirschsprung disease include constipation, vomiting, abdominal distension and growth failure. Untreated disease usually causes death in childhood because bloodstream bacterial infections occur in the context of bowel inflammation (enterocolitis) or bowel perforation. Current treatment is surgical resection of the bowel to remove or bypass regions where the ENS is missing, but many children have problems after surgery. Although the anatomy of Hirschsprung disease is simple, many clinical features remain enigmatic, and diagnosis and management remain challenging. For example, the age of presentation and the type of symptoms that occur vary dramatically among patients, even though every affected child has missing neurons in the distal bowel at birth. In this Review, basic science discoveries are linked to clinical manifestations of Hirschsprung disease, including partial penetrance, enterocolitis and genetics. Insights into disease mechanisms that might lead to new prevention, diagnostic and treatment strategies are described.
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9
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Giancola F, Rambaldi AM, Bianco F, Iusco S, Romagnoli N, Tagliavia C, Bombardi C, Clavenzani P, De Giorgio R, Chiocchetti R. Localization of the 5-hydroxytryptamine 4 receptor in equine enteric neurons and extrinsic sensory fibers. Neurogastroenterol Motil 2017; 29. [PMID: 28256032 DOI: 10.1111/nmo.13045] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 01/09/2017] [Accepted: 01/09/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND Serotonin plays a pivotal role in regulating gut motility, visceral sensitivity, and fluid secretion via specific receptors. Among these receptors, 5-HT4 exerts a prominent control on gut motor function. Although the prokinetic effect exerted by 5-HT4 agonists is well known, the cellular sites of 5-HT4 expression remain poorly understood in large mammals, e.g., horses. In this study, we evaluated the distribution of 5-HT4 in the horse intestine and in foals with enteric aganglionosis, reminiscent of human Hirschsprung's disease. METHODS The intestine and spinal ganglia were obtained from three healthy horses and two foals with hereditary ileocolonic aganglionosis. Tissues were processed for immunohistochemistry using a specific antibody to 5-HT4 and a variety of neuronal markers. Myenteric and submucosal plexus 5-HT4 -immunoreactive (IR) neurons were quantified as relative percentage (mean±SD) to the total number of neurons counted. Furthermore, the density of 5-HT4 -IR nerve fibers was evaluated in the mucosa and tunica muscularis. KEY RESULTS The 5-HT4 immunoreactivity was localized to large percentages of myenteric neurons ranging from 28±9% (descending colon) to 63±19% (ileum), and submucosal neurons ranging from 54±6% (ileum) to 68±14% (duodenum). The 5-HT4 -immunoreactivity was co-expressed by some substance P-IR (SP-IR) spinal ganglion neurons and extrinsic sensory fibers of aganglionic foals. CONCLUSIONS & INFERENCES The presence of 5-HT4 in many enteric and extrinsic sensory neurons and nerve fibers provides solid morphological evidence of the cellular sites of 5-HT4 expression in horses. The evidence of SP-IR sensory neurons positive for 5-HT4 suggests its role in visceral sensitivity.
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Affiliation(s)
- F Giancola
- Department of Veterinary Medical Sciences (UNI EN ISO 9001:2008), University of Bologna, Bologna, Italy.,Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - A M Rambaldi
- Department of Veterinary Medical Sciences (UNI EN ISO 9001:2008), University of Bologna, Bologna, Italy
| | - F Bianco
- Department of Veterinary Medical Sciences (UNI EN ISO 9001:2008), University of Bologna, Bologna, Italy.,Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - S Iusco
- Department of Veterinary Medical Sciences (UNI EN ISO 9001:2008), University of Bologna, Bologna, Italy
| | - N Romagnoli
- Department of Veterinary Medical Sciences (UNI EN ISO 9001:2008), University of Bologna, Bologna, Italy
| | - C Tagliavia
- Department of Veterinary Medical Sciences (UNI EN ISO 9001:2008), University of Bologna, Bologna, Italy
| | - C Bombardi
- Department of Veterinary Medical Sciences (UNI EN ISO 9001:2008), University of Bologna, Bologna, Italy
| | - P Clavenzani
- Department of Veterinary Medical Sciences (UNI EN ISO 9001:2008), University of Bologna, Bologna, Italy
| | - R De Giorgio
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - R Chiocchetti
- Department of Veterinary Medical Sciences (UNI EN ISO 9001:2008), University of Bologna, Bologna, Italy
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10
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Yu H, Zheng BJ, Pan WK, Wang HJ, Xie C, Zhao YY, Chen XL, Liu Y, Gao Y. Combination of exogenous cell transplantation and 5-HT 4 receptor agonism induce endogenous enteric neural crest-derived cells in a rat hypoganglionosis model. Exp Cell Res 2016; 351:36-42. [PMID: 28034674 DOI: 10.1016/j.yexcr.2016.12.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 12/23/2016] [Accepted: 12/25/2016] [Indexed: 01/06/2023]
Abstract
Enteric neural crest-derived cells (ENCCs) can migrate into endogenous ganglia and differentiate into progeny cells, and have even partially rescued bowel function; however, poor reliability and limited functional recovery after ENCC transplantation have yet to be addressed. Here, we investigated the induction of endogenous ENCCs by combining exogenous ENCC transplantation with a 5-HT4 receptor agonist mosapride in a rat model of hypoganglionosis, established by benzalkonium chloride treatment. ENCCs, isolated from the gut of newborn rats, were labeled with a lentiviral eGFP reporter. ENCCs and rats were treated with the 5-HT4 receptor agonist/antagonist. The labeled ENCCs were then transplanted into the muscular layer of benzalkonium chloride-treated colons. At given days post-intervention, colonic tissue samples were removed for histological analysis. ENCCs and neurons were detected by eGFP expression and immunoreactivity to p75NTR and peripherin, respectively. eGFP-positive ENCCs and neurons could survive and maintain levels of fluorescence after transplantation. With longer times post-intervention, the number of peripherin-positive cells gradually increased in all groups. Significantly more peripherin-positive cells were found following ENCCs plus mosapride treatment, compared with the other groups. These results show that exogenous ENCCs combined with the 5-HT4 receptor agonist effectively induced endogenous ENCCs proliferation and differentiation in a rat hypoganglionosis model.
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Affiliation(s)
- Hui Yu
- Department of Pediatric Surgery, the Second Affiliated Hospital, Xi'an Jiaotong University, No 157, Xi Wu Road, Xi'an 710004, Shaanxi, China; Institute of Neurobiology, Environment and Genes Related to Diseases Key Laboratory of Chinese Ministry of Education, Xi'an Jiaotong University, No 96, Yan Ta Xi Road, Xi'an 710061, Shaanxi, China
| | - Bai-Jun Zheng
- Department of Pediatric Surgery, the Second Affiliated Hospital, Xi'an Jiaotong University, No 157, Xi Wu Road, Xi'an 710004, Shaanxi, China
| | - Wei-Kang Pan
- Department of Pediatric Surgery, the Second Affiliated Hospital, Xi'an Jiaotong University, No 157, Xi Wu Road, Xi'an 710004, Shaanxi, China
| | - Huai-Jie Wang
- Department of Pediatric Surgery, the Second Affiliated Hospital, Xi'an Jiaotong University, No 157, Xi Wu Road, Xi'an 710004, Shaanxi, China
| | - Chong Xie
- Department of Pediatric Surgery, the Second Affiliated Hospital, Xi'an Jiaotong University, No 157, Xi Wu Road, Xi'an 710004, Shaanxi, China
| | - Yu-Ying Zhao
- Department of Pediatric Surgery, the Second Affiliated Hospital, Xi'an Jiaotong University, No 157, Xi Wu Road, Xi'an 710004, Shaanxi, China
| | - Xin-Lin Chen
- Institute of Neurobiology, Environment and Genes Related to Diseases Key Laboratory of Chinese Ministry of Education, Xi'an Jiaotong University, No 96, Yan Ta Xi Road, Xi'an 710061, Shaanxi, China
| | - Yong Liu
- Institute of Neurobiology, Environment and Genes Related to Diseases Key Laboratory of Chinese Ministry of Education, Xi'an Jiaotong University, No 96, Yan Ta Xi Road, Xi'an 710061, Shaanxi, China
| | - Ya Gao
- Department of Pediatric Surgery, the Second Affiliated Hospital, Xi'an Jiaotong University, No 157, Xi Wu Road, Xi'an 710004, Shaanxi, China.
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11
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Margolis KG, Gershon MD. Enteric Neuronal Regulation of Intestinal Inflammation. Trends Neurosci 2016; 39:614-624. [PMID: 27450201 DOI: 10.1016/j.tins.2016.06.007] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 06/24/2016] [Accepted: 06/27/2016] [Indexed: 02/07/2023]
Abstract
Recent research has highlighted the importance of the two-way interaction between the nervous and immune systems. This interaction is particularly important in the bowel because of the unique properties of this organ. The lumen of the gut is lined by a very large but remarkably thin surface that separates the body from the enteric microbiome. Immune defenses against microbial invasion are thus well developed and neuroimmune interactions are important in regulating and integrating these defenses. Important concepts in the phylogeny of neuroimmunity, enteric neuronal and glial regulation of immunity, changes that occur in the enteric nervous system during inflammation, the fundamental role of serotonin (5-HT) in enteric neuroimmune mechanisms, and future perspectives are reviewed.
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Affiliation(s)
- Kara Gross Margolis
- Department of Pediatrics, Columbia University College of Physicians and Surgeons, 620 West 168th Street, New York, NY 10032, USA
| | - Michael D Gershon
- Department of Pathology and Cell Biology, Columbia University College of Physicians and Surgeons, 650 West 168th Street, New York, NY 10032, USA.
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12
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Takaki M, Goto K, Kawahara I, Nabekura J. Activation of 5-HT4 receptors facilitates neurogenesis of injured enteric neurons at an anastomosis in the lower gut. J Smooth Muscle Res 2016; 51:82-94. [PMID: 26658112 PMCID: PMC5137308 DOI: 10.1540/jsmr.51.82] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Two-photon microscopy (2PM) can enable high-resolution deep imaging of thick tissue by
exciting a fluorescent dye and protein at anastomotic sites in the mouse small intestine
in vivo. We performed gut surgery and transplanted neural stem cells
(NSC) from the embryonic central nervous system after marking them with the fluorescent
cell linker, PKH26. We found that neurons differentiated from transplanted NSC (PKH [+])
and newborn enteric neurons differentiated from mobilized (host) NSC (YFP [+]) could be
localized within the granulation tissue of anastomoses. A 5-HT4-receptor
agonist, mosapride citrate (MOS), significantly increased the number of PKH (+) and YFP
(+) neurons by 2.5-fold (P<0.005). The distribution patterns of PKH
(+) neurons were similar to those of YFP (+) neurons. On the other hand, the
5-HT4-receptor antagonist, SB-207266 abolished these effects of MOS. These
results indicate that neurogenesis from transplanted NSC is facilitated by activation of
5-HT4-receptors. Thus, a combination of drug administration and cell
transplantation could be more beneficial than exclusive cell transplantation in treating
Hirschsprung's disease and related disorders including post rectal cancer surgery. The
underlying mechanisms for its action were explored using immunohistochemistry of the
longitudinal mouse ileum and rat rectal preparations including an anastomosis. MOS
significantly increased the number of new neurons, but not when co-administered with
either of a protein tyrosine kinase receptor, c-RET two inhibitors. The c-RET signaling
pathway contributes to enteric neurogenesis facilitated by MOS. In the future, we would
perform functional studies of new neurons over the thick granulation tissue at
anastomoses, using in vivo imaging with 2PM and double transgenic mice
expressing a calcium indicator such as GCaMP6 and channelrhodopsin.
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Affiliation(s)
- Miyako Takaki
- Department of Physiology II, Nara Medical University, School of Medicine, Kashihara, Nara, Japan
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In Vivo Transplantation of Enteric Neural Crest Cells into Mouse Gut; Engraftment, Functional Integration and Long-Term Safety. PLoS One 2016; 11:e0147989. [PMID: 26824433 PMCID: PMC4732685 DOI: 10.1371/journal.pone.0147989] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 01/11/2016] [Indexed: 01/20/2023] Open
Abstract
Objectives Enteric neuropathies are severe gastrointestinal disorders with unsatisfactory outcomes. We aimed to investigate the potential of enteric neural stem cell therapy approaches for such disorders by transplanting mouse enteric neural crest cells (ENCCs) into ganglionic and aganglionic mouse gut in vivo and analysing functional integration and long-term safety. Design Neurospheres generated from yellow fluorescent protein (YFP) expressing ENCCs selected from postnatal Wnt1-cre;R26R-YFP/YFP murine gut were transplanted into ganglionic hindgut of wild-type littermates or aganglionic hindgut of Ednrbtm1Ywa mice (lacking functional endothelin receptor type-B). Intestines were then assessed for ENCC integration and differentiation using immunohistochemistry, cell function using calcium imaging, and long-term safety using PCR to detect off-target YFP expression. Results YFP+ ENCCs engrafted, proliferated and differentiated into enteric neurons and glia within recipient ganglionic gut. Transplanted cells and their projections spread along the endogenous myenteric plexus to form branching networks. Electrical point stimulation of endogenous nerve fibres resulted in calcium transients (F/F0 = 1.16±0.01;43 cells, n = 6) in YFP+ transplanted ENCCs (abolished with TTX). Long-term follow-up (24 months) showed transplanted ENCCs did not give rise to tumours or spread to other organs (PCR negative in extraintestinal sites). In aganglionic gut ENCCs similarly spread and differentiated to form neuronal and glial networks with projections closely associated with endogenous neural networks of the transition zone. Conclusions Transplanted ENCCs successfully engrafted into recipient ganglionic and aganglionic gut showing appropriate spread, localisation and, importantly, functional integration without any long-term safety issues. This study provides key support for the development and use of enteric neural stem cell therapies.
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14
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Rivera FJ, Kazanis I, Ghevaert C, Aigner L. Beyond Clotting: A Role of Platelets in CNS Repair? Front Cell Neurosci 2016; 9:511. [PMID: 26834562 PMCID: PMC4718976 DOI: 10.3389/fncel.2015.00511] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 12/21/2015] [Indexed: 12/16/2022] Open
Affiliation(s)
- Francisco J Rivera
- Institute of Molecular Regenerative Medicine, Paracelsus Medical University SalzburgSalzburg, Austria; Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University SalzburgSalzburg, Austria
| | - Ilias Kazanis
- Department of Clinical Neuroscience, Wellcome Trust-MRC Cambridge Stem Cell Institute, University of CambridgeCambridge, UK; Department of Biology, University of PatrasPatras, Greece
| | - Cedric Ghevaert
- Department of Haematology, University of CambridgeCambridge, UK; National Health Service Blood and Transplant, Cambridge Biomedical CampusCambridge, UK
| | - Ludwig Aigner
- Institute of Molecular Regenerative Medicine, Paracelsus Medical University SalzburgSalzburg, Austria; Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University SalzburgSalzburg, Austria
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Terry N, Margolis KG. Serotonergic Mechanisms Regulating the GI Tract: Experimental Evidence and Therapeutic Relevance. Handb Exp Pharmacol 2016; 239:319-342. [PMID: 28035530 DOI: 10.1007/164_2016_103] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Serotonin (5-hydroxytryptamine; 5-HT) is best known as a neurotransmitter critical for central nervous system (CNS) development and function. 95% of the body's serotonin, however, is produced in the intestine where it has been increasingly recognized for its hormonal, autocrine, paracrine, and endocrine actions. This chapter provides the most current knowledge of the critical autocrine and paracrine roles of 5-HT in intestinal motility and inflammation as well as its function as a hormone in osteocyte homeostasis. Therapeutic applications in each of these areas are also discussed.
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Affiliation(s)
- Natalie Terry
- Division of Pediatric Gastroenterology, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Kara Gross Margolis
- Division of Pediatric Gastroenterology, Department of Pediatrics, Morgan Stanley Children's Hospital, Columbia University Medical Center, New York, NY, USA.
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