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Woods C, Flockton AR, Belkind-Gerson J. Phosphatase and Tensin Homolog Inhibition in Proteolipid Protein 1-Expressing Cells Stimulates Neurogenesis and Gliogenesis in the Postnatal Enteric Nervous System. Biomolecules 2024; 14:346. [PMID: 38540765 PMCID: PMC10967813 DOI: 10.3390/biom14030346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 03/07/2024] [Accepted: 03/11/2024] [Indexed: 04/04/2024] Open
Abstract
Phosphatase and tensin homolog (Pten) is a key regulator of cell proliferation and a potential target to stimulate postnatal enteric neuro- and/or gliogenesis. To investigate this, we generated two tamoxifen-inducible Cre recombinase murine models in which Pten was conditionally ablated, (1) in glia (Plp1-expressing cells) and (2) in neurons (Calb2-expressing cells). Tamoxifen-treated adult (7-12 weeks of age; n = 4-15) mice were given DSS to induce colitis, EdU to monitor cell proliferation, and were evaluated at two timepoints: (1) early (3-4 days post-DSS) and (2) late (3-4 weeks post-DSS). We investigated gut motility and evaluated the enteric nervous system. Pten inhibition in Plp1-expressing cells elicited gliogenesis at baseline and post-DSS (early and late) in the colon, and neurogenesis post-DSS late in the proximal colon. They also exhibited an increased frequency of colonic migrating motor complexes (CMMC) and slower whole gut transit times. Pten inhibition in Calb2-expressing cells did not induce enteric neuro- or gliogenesis, and no alterations were detected in CMMC or whole gut transit times when compared to the control at baseline or post-DSS (early and late). Our results merit further research into Pten modulation where increased glia and/or slower intestinal transit times are desired (e.g., short-bowel syndrome and rapid-transit disorders).
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Affiliation(s)
- Crystal Woods
- Department of Pediatrics, Section of Gastroenterology, Hepatology and Nutrition, University of Colorado, Aurora, CO 80045, USA; (C.W.); (A.R.F.)
| | - Amanda R. Flockton
- Department of Pediatrics, Section of Gastroenterology, Hepatology and Nutrition, University of Colorado, Aurora, CO 80045, USA; (C.W.); (A.R.F.)
| | - Jaime Belkind-Gerson
- Department of Pediatrics, Section of Gastroenterology, Hepatology and Nutrition, University of Colorado, Aurora, CO 80045, USA; (C.W.); (A.R.F.)
- Neurogastroenterology and Motility Program, Digestive Health Institute, Children’s Hospital Colorado, Aurora, CO 80045, USA
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Kulkarni S, Saha M, Slosberg J, Singh A, Nagaraj S, Becker L, Zhang C, Bukowski A, Wang Z, Liu G, Leser JM, Kumar M, Bakhshi S, Anderson MJ, Lewandoski M, Vincent E, Goff LA, Pasricha PJ. Age-associated changes in lineage composition of the enteric nervous system regulate gut health and disease. eLife 2023; 12:RP88051. [PMID: 38108810 PMCID: PMC10727506 DOI: 10.7554/elife.88051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023] Open
Abstract
The enteric nervous system (ENS), a collection of neural cells contained in the wall of the gut, is of fundamental importance to gastrointestinal and systemic health. According to the prevailing paradigm, the ENS arises from progenitor cells migrating from the neural crest and remains largely unchanged thereafter. Here, we show that the lineage composition of maturing ENS changes with time, with a decline in the canonical lineage of neural-crest derived neurons and their replacement by a newly identified lineage of mesoderm-derived neurons. Single cell transcriptomics and immunochemical approaches establish a distinct expression profile of mesoderm-derived neurons. The dynamic balance between the proportions of neurons from these two different lineages in the post-natal gut is dependent on the availability of their respective trophic signals, GDNF-RET and HGF-MET. With increasing age, the mesoderm-derived neurons become the dominant form of neurons in the ENS, a change associated with significant functional effects on intestinal motility which can be reversed by GDNF supplementation. Transcriptomic analyses of human gut tissues show reduced GDNF-RET signaling in patients with intestinal dysmotility which is associated with reduction in neural crest-derived neuronal markers and concomitant increase in transcriptional patterns specific to mesoderm-derived neurons. Normal intestinal function in the adult gastrointestinal tract therefore appears to require an optimal balance between these two distinct lineages within the ENS.
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Affiliation(s)
- Subhash Kulkarni
- Division of Gastroenterology, Dept of Medicine, Beth Israel Deaconess Medical CenterBostonUnited States
- Division of Medical Sciences, Harvard Medical SchoolBostonUnited States
| | - Monalee Saha
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Jared Slosberg
- Department of Genetic Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Alpana Singh
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Sushma Nagaraj
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Laren Becker
- Division of Gastroenterology, Stanford University – School of MedicineStanfordUnited States
| | - Chengxiu Zhang
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Alicia Bukowski
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Zhuolun Wang
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Guosheng Liu
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Jenna M Leser
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Mithra Kumar
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Shriya Bakhshi
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Matthew J Anderson
- Center for Cancer Research, National Cancer InstituteFrederickUnited States
| | - Mark Lewandoski
- Center for Cancer Research, National Cancer InstituteFrederickUnited States
| | - Elizabeth Vincent
- Department of Genetic Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Loyal A Goff
- Department of Neuroscience, Johns Hopkins University – School of MedicineBaltimoreUnited States
- Kavli Neurodiscovery Institute, Johns Hopkins University – School of MedicineBaltimoreUnited States
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Shi C, Xu S, Huang C, Wang Z, Wang W, Ming D, Yin X, Liu H, Wang F. Pyrroloquinoline Quinone Regulates Enteric Neurochemical Plasticity of Weaned Rats Challenged With Lipopolysaccharide. Front Neurosci 2022; 16:878541. [PMID: 35592257 PMCID: PMC9112857 DOI: 10.3389/fnins.2022.878541] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 03/15/2022] [Indexed: 11/13/2022] Open
Abstract
The enteric nervous system (ENS) is important for the intestinal barrier to defend and regulate inflammation in the intestine. The aim of this study was to investigate the effect of pyrroloquinoline quinone (PQQ) on regulating neuropeptide secretion by ENS neurons of rats challenged with lipopolysaccharide (LPS) to create enteritis. Thirty Sprague Dawley rats were divided into five groups, namely, basal (CTRL), basal plus LPS challenge (LPS), basal with 2.5 mg/kg b.w./day of PQQ plus challenge with LPS (PQQ 2.5), basal with 5.0 mg/kg b.w./day PQQ plus challenge with LPS (PQQ 5), and basal with 10.0 mg/kg b.w./day PQQ plus challenge with LPS (PQQ 10). After treatment with basal diet or PQQ for 14 days, rats were challenged with LPS except for the CTRL group. Rats were euthanized 6 h after the LPS challenge. Rats showed an increased average daily gain in PQQ treatment groups (P < 0.05). Compared with the LPS group, PQQ 5 and PQQ 10 rats showed increased villus height and villus height/crypt depth of jejunum (P < 0.05). In PQQ treatment groups, concentrations of IL-1β and TNF-α in serum and intestine of rats were decreased, and IL-10 concentration was increased in serum compared with the LPS group (P < 0.05). Compared with the LPS group, the concentration of neuropeptide Y (NPY), nerve growth factor (NGF), vasoactive intestinal peptide (VIP), substance P (SP), calcitonin gene-related peptide (CGRP), and brain-derived neurotropic factor (BDNF) in serum were decreased in PQQ treatment groups (P < 0.05). Compared with the LPS group, ileal mRNA levels of BDNF, NPY, and NGF were decreased in PQQ treatment groups (P < 0.05). Jejunal concentrations of SP, CGRP, VIP, BDNF, NPY, and NGF were decreased in PQQ treatment groups compared with the LPS group (P < 0.05). Compared with the LPS group, phosphor-protein kinase B (p-Akt)/Akt levels in jejunum and colon were decreased in PQQ treatment groups (P < 0.05). In conclusion, daily treatment with PQQ improved daily gain, jejunal morphology, immune responses. PQQ-regulated enteric neurochemical plasticity of ENS via the Akt signaling pathway of weaned rats suffering from enteritis.
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Affiliation(s)
- Chenyu Shi
- State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Song Xu
- State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Caiyun Huang
- College of Animal Science, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Zijie Wang
- State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Wenhui Wang
- State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Dongxu Ming
- State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Xindi Yin
- Department of Nutrition and Health, China Agricultural University, Beijing, China
| | - Hu Liu
- State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Fenglai Wang
- State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
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邢 瑶, 刘 子, 张 晓, 王 建. [Effects of leptin on proliferation and differentiation of hypoxic rat retinal progenitor cells in vitro]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2022; 42:354-359. [PMID: 35426798 PMCID: PMC9010985 DOI: 10.12122/j.issn.1673-4254.2022.03.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Indexed: 06/14/2023]
Abstract
OBJECTIVE To investigate the the effects of leptin on the proliferation, differentiation and PTEN expression of rat retinal progenitor cells (RPCs) cultured under hypoxic condition. METHODS SD rat RPCs were cultured in normoxic conditions or exposed to hypoxia in the presence of 0, 0.3, 1.0, 3.0, 10, and 30 nmol/L leptin for 12, 48 and 72 h, and the cell viability was assessed using cell counting kit 8 (CCK 8) assay. The RPCs in primary culture were divided into control group, hypoxia group, and hypoxia+leptin group, and after 48 h of culture, the cell medium was replaced with differentiation medium and the cells were further cultured for 6 days. Immunofluorescence staining was employed to detect the cells positive for β-tubulin III and GFAP, and Western blotting was used to examine the expression of PTEN at 48 h of cell culture. RESULTS The first generation of RPCs showed suspended growth in the medium with abundant and bright cellular plasma and formed mulberry like cell spheres after 2 days of culture. Treatment with low-dose leptin (below 3.0 nmol/L) for 48 h obviously improved the viability of RPCs cultured in hypoxia, while at high concentrations (above 10 nmol/L), leptin significantly suppressed the cell viability (P < 0.05). The cells treated with 3.0 nmol/L leptin for 48 h showed the highest viability (P < 0.05). After treatment with 3.0 nmol/L leptin for 48 h, the cells with hypoxic exposure showed similar GFAP and β-tubulin Ⅲ positivity with the control cells (P>0.05), but exhibited an obvious down-regulation of PTEN protein expression compared with the control cells (P < 0.05). CONCLUSION In rat RPCs with hypoxic exposure, treatment with low dose leptin can promote the cell proliferation and suppress cellular PTEN protein expression without causing significant effects on cell differentiation.
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Affiliation(s)
- 瑶 邢
- />西安交通大学第二附属医院眼科,陕西 西安 710004Department of Ophthalmology, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - 子瑶 刘
- />西安交通大学第二附属医院眼科,陕西 西安 710004Department of Ophthalmology, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - 晓辉 张
- />西安交通大学第二附属医院眼科,陕西 西安 710004Department of Ophthalmology, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - 建明 王
- />西安交通大学第二附属医院眼科,陕西 西安 710004Department of Ophthalmology, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
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Yarandi SS, Kulkarni S, Saha M, Sylvia KE, Sears CL, Pasricha PJ. Intestinal Bacteria Maintain Adult Enteric Nervous System and Nitrergic Neurons via Toll-like Receptor 2-induced Neurogenesis in Mice. Gastroenterology 2020; 159:200-213.e8. [PMID: 32234538 PMCID: PMC7387157 DOI: 10.1053/j.gastro.2020.03.050] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 03/01/2020] [Accepted: 03/20/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND & AIMS The enteric nervous system (ENS) exists in close proximity to luminal bacteria. Intestinal microbes regulate ENS development, but little is known about their effects on adult enteric neurons. We investigated whether intestinal bacteria or their products affect the adult ENS via toll-like receptors (TLRs) in mice. METHODS We performed studies with conventional C57/BL6, germ-free C57/BL6, Nestin-creERT2:tdTomato, Nestin-GFP, and ChAT-cre:tdTomato. Mice were given drinking water with ampicillin or without (controls). Germ-free mice were given drinking water with TLR2 agonist or without (controls). Some mice were given a blocking antibody against TLR2 or a TLR4 inhibitor. We performed whole gut transit, bead latency, and geometric center studies. Feces were collected and analyzed by 16S ribosomal RNA gene sequencing. Longitudinal muscle myenteric plexus (LMMP) tissues were collected, analyzed by immunohistochemistry, and levels of nitric oxide were measured. Cells were isolated from colonic LMMP of Nestin-creERT2:tdTomato mice and incubated with agonists of TLR2 (receptor for gram-positive bacteria), TLR4 (receptor for gram-negative bacteria), or distilled water (control) and analyzed by flow cytometry. RESULTS Stool from mice given ampicillin had altered composition of gut microbiota with reduced abundance of gram-positive bacteria and increased abundance of gram-negative bacteria, compared with mice given only water. Mice given ampicillin had reduced colon motility compared with mice given only water, and their colonic LMMP had reduced numbers of nitrergic neurons, reduced neuronal nitric oxide synthase production, and reduced colonic neurogenesis. Numbers of colonic myenteric neurons increased after mice were switched from ampicillin to plain water, with increased markers of neurogenesis. Nestin-positive enteric neural precursor cells expressed TLR2 and TLR4. In cells isolated from the colonic LMMP, incubation with the TLR2 agonist increased the percentage of neurons originating from enteric neural precursor cells to approximately 10%, compared with approximately 0.01% in cells incubated with the TLR4 agonist or distilled water. Mice given an antibody against TLR2 had prolonged whole gut transit times; their colonic LMMP had reduced total neurons and a smaller proportion of nitrergic neurons per ganglion, and reduced markers of neurogenesis compared with mice given saline. Colonic LMMP of mice given the TLR4 inhibitor did not have reduced markers of neurogenesis. Colonic LMMP of germ-free mice given TLR2 agonist had increased neuronal numbers compared with control germ-free mice. CONCLUSIONS In the adult mouse colon, TLR2 promotes colonic neurogenesis, regulated by intestinal bacteria. Our findings indicate that colonic microbiota help maintain the adult ENS via a specific signaling pathway. Pharmacologic and probiotic approaches directed towards specific TLR2 signaling processes might be developed for treatment of colonic motility disorders related to use of antibiotics or other factors.
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Affiliation(s)
- Shadi S. Yarandi
- Center for Neurogastroenterology and Division of Gastroenterology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Subhash Kulkarni
- Center for Neurogastroenterology and Division of Gastroenterology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Monalee Saha
- Center for Neurogastroenterology and Division of Gastroenterology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Kristyn E. Sylvia
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Cynthia L. Sears
- Departments of Medicine, Oncology and Molecular Microbiology & Immunology, the Bloomberg-Kimmel Institute for Immunotherapy, Johns Hopkins University School of Medicine and the Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Pankaj J. Pasricha
- Center for Neurogastroenterology and Division of Gastroenterology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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Fu M, Barlow-Anacker AJ, Kuruvilla KP, Bowlin GL, Seidel CW, Trainor PA, Gosain A. 37/67-laminin receptor facilitates neural crest cell migration during enteric nervous system development. FASEB J 2020; 34:10931-10947. [PMID: 32592286 DOI: 10.1096/fj.202000699r] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/28/2020] [Accepted: 06/08/2020] [Indexed: 12/16/2022]
Abstract
Enteric nervous system (ENS) development is governed by interactions between neural crest cells (NCC) and the extracellular matrix (ECM). Hirschsprung disease (HSCR) results from incomplete NCC migration and failure to form an appropriate ENS. Prior studies implicate abnormal ECM in NCC migration failure. We performed a comparative microarray of the embryonic distal hindgut of wild-type and EdnrBNCC-/- mice that model HSCR and identified laminin-β1 as upregulated in EdnrBNCC-/- colon. We identified decreased expression of 37/67 kDa laminin receptor (LAMR), which binds laminin-β1, in human HSCR myenteric plexus and EdnrBNCC-/- NCC. Using a combination of in vitro gut slice cultures and ex vivo organ cultures, we determined the mechanistic role of LAMR in NCC migration. We found that enteric NCC express LAMR, which is downregulated in human and murine HSCR. Binding of LAMR by the laminin-β1 analog YIGSR promotes NCC migration. Silencing of LAMR abrogated these effects. Finally, applying YIGSR to E13.5 EdnrBNCC-/- colon explants resulted in 80%-100% colonization of the hindgut. This study adds LAMR to the large list of receptors through which NCC interact with their environment during ENS development. These results should be used to inform ongoing integrative, regenerative medicine approaches to HSCR.
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Affiliation(s)
- Ming Fu
- Division of Pediatric Surgery, Department of Surgery, University of Tennessee Health Sciences Center, Memphis, TN, USA
| | - Amanda J Barlow-Anacker
- Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Korah P Kuruvilla
- Division of Pediatric Surgery, Department of Surgery, University of Tennessee Health Sciences Center, Memphis, TN, USA
| | - Gary L Bowlin
- Department of Biomedical Engineering, University of Memphis, Memphis, TN, USA
| | | | - Paul A Trainor
- Stowers Institute for Medical Research, Kansas City, MO, USA.,Department of Anatomy and Cell Biology, University of Kansas School of Medicine, Kansas City, KS, USA
| | - Ankush Gosain
- Division of Pediatric Surgery, Department of Surgery, University of Tennessee Health Sciences Center, Memphis, TN, USA.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, TN, USA
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Veríssimo CP, Carvalho JDS, da Silva FJM, Campanati L, Moura-Neto V, Coelho-Aguiar JDM. Laminin and Environmental Cues Act in the Inhibition of the Neuronal Differentiation of Enteric Glia in vitro. Front Neurosci 2019; 13:914. [PMID: 31551680 PMCID: PMC6733987 DOI: 10.3389/fnins.2019.00914] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 08/16/2019] [Indexed: 12/31/2022] Open
Abstract
The enteric glia, a neural crest-derived cell type that composes the Enteric Nervous System, is involved in controlling gut functions, including motility, gut permeability, and neuronal communication. Moreover this glial cell could to give rise to new neurons. It is believed that enteric neurons are generated up to 21 days postnatally; however, adult gut cells with glial characteristics can give rise to new enteric neurons under certain conditions. The factors that activate this capability of enteric glia to differentiate into neurons remain unknown. Here, we followed the progress of this neuronal differentiation and investigated this ability by challenging enteric glial cells with different culture conditions. We found that, in vitro, enteric glial cells from the gut of adult and neonate mice have a high capability to acquire neuronal markers and undergoing morphological changes. In a co-culture system with 3T3 fibroblasts, the number of glial cells expressing βIIItubulin decreased after 7 days. The effect of 3T3-conditioned medium on adult cells was not significant, and fewer enteric glial cells from neonate mice began the neurogenic process in this medium. Laminin, an extracellular matrix protein that is highly expressed by the niche of the enteric ganglia, seemed to have a large role in inhibiting the differentiation of enteric glia, at least in cells from the adult gut. Our results suggest that, in an in vitro approach that provides conditions more similar to those of enteric glial cells in vivo, these cells could, to some extent, retain their morphology and marker expression, with their neurogenic potential inhibited. Importantly, laminin seemed to inhibit differentiation of adult enteric glial cells. It is possible that the differentiation of enteric glia into neurons is related to severe changes in the microenvironment, leading to disruption of the basement membrane. In summary, our data indicated that the interaction between the enteric glial cells and their microenvironment molecules significantly affects the control of their behavior and functions.
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Affiliation(s)
- Carla Pires Veríssimo
- Instituto Estadual do Cérebro Paulo Niemeyer, Secretaria de Estado de Saúde do Rio de Janeiro, Rio de Janeiro, Brazil.,Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,Pós-graduação em Anatomia Patológica, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Juliana da Silva Carvalho
- Instituto Estadual do Cérebro Paulo Niemeyer, Secretaria de Estado de Saúde do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Loraine Campanati
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Vivaldo Moura-Neto
- Instituto Estadual do Cérebro Paulo Niemeyer, Secretaria de Estado de Saúde do Rio de Janeiro, Rio de Janeiro, Brazil.,Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Juliana de Mattos Coelho-Aguiar
- Instituto Estadual do Cérebro Paulo Niemeyer, Secretaria de Estado de Saúde do Rio de Janeiro, Rio de Janeiro, Brazil.,Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Jonscher R, Belkind-Gerson J. Concise Review: Cellular and Molecular Mechanisms of Postnatal Injury-Induced Enteric Neurogenesis. Stem Cells 2019; 37:1136-1143. [PMID: 31145813 DOI: 10.1002/stem.3045] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 05/14/2019] [Indexed: 12/20/2022]
Abstract
Although still controversial, there is increasing agreement that postnatal neurogenesis occurs in the enteric nervous system (ENS) in response to injury. Following acute colitis, there is significant cell death of enteric neurons and evidence suggests that subsequent neural regeneration follows. An enteric neural stem/progenitor cell population with neurogenic potential has been identified in culture; in vivo, compensatory neurogenesis is driven by enteric glia and may also include de-differentiated Schwann cells. Recent evidence suggests that changes in the enteric microenvironment due to injury-associated increases in glial cell-derived neurotrophic factor (GDNF), serotonin (5-hydroxytryptamine [HT]), products from the gut microbiome, and possibly endocannabinoids may lead to the transdifferentiation of mature enteric glia and may reprogram recruited Schwann cells. Targeting neurogenic pathways presents a promising avenue toward the development of new and innovative treatments for acquired damage to the ENS. In this review, we discuss potential sources of newly generated adult enteric neurons, the involvement of GDNF, 5-HT, endocannabinoids, and lipopolysaccharide, as well as therapeutic applications of this evolving work. Stem Cells 2019;37:1136-1143.
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Affiliation(s)
- Raleigh Jonscher
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Jaime Belkind-Gerson
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA.,Neurogastroenterology Program, Digestive Health Institute, Children's Hospital Colorado, Aurora, Colorado, USA
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9
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Grundmann D, Loris E, Maas-Omlor S, Schäfer KH. Enteric Neurogenesis During Life Span Under Physiological and Pathophysiological Conditions. Anat Rec (Hoboken) 2019; 302:1345-1353. [PMID: 30950581 DOI: 10.1002/ar.24124] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Revised: 02/04/2019] [Accepted: 02/21/2019] [Indexed: 12/20/2022]
Abstract
The enteric nervous system (ENS) controls gastrointestinal key functions and is mainly characterized by two ganglionated plexus located in the gut wall: the myenteric plexus and the submucous plexus. The ENS harbors a high number and diversity of enteric neurons and glial cells, which generate neuronal circuitry to regulate intestinal physiology. In the past few years, the pivotal role of enteric neurons in the underlying mechanism of several intestinal diseases was revealed. Intestinal diseases are associated with neuronal death that could in turn compromise intestinal functionality. Enteric neurogenesis and regeneration is therefore a crucial aspect within the ENS and could be revealed not only during embryogenesis and early postnatal periods, but also in the adulthood. Enteric glia and/or enteric neural precursor/progenitor cells differentiate into enteric neurons, both under homeostatic and pathologic conditions beyond the perinatal period. The unique role of the intestinal microbiota and serotonin signaling in postnatal and adult neurogenesis has been shown by several studies in health and disease. In this review article, we will mainly focus on different recent studies, which advanced the concept of postnatal and adult ENS neurogenesis. Moreover, we will discuss the key factors and underlying mechanisms, which promote enteric neurogenesis. Finally, we will shortly describe neurogenesis of transplanted enteric neural progenitor cells. Anat Rec, 302:1345-1353, 2019. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- David Grundmann
- Department of Biotechnology, University of Applied Sciences Kaiserslautern, Zweibrucken, Germany
| | - Eva Loris
- Department of Biotechnology, University of Applied Sciences Kaiserslautern, Zweibrucken, Germany
| | - Silke Maas-Omlor
- Department of Biotechnology, University of Applied Sciences Kaiserslautern, Zweibrucken, Germany
| | - Karl-Herbert Schäfer
- Department of Biotechnology, University of Applied Sciences Kaiserslautern, Zweibrucken, Germany.,Department of Pediatric Surgery, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
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10
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Zhang L, Song J, Bai T, Wang R, Hou X. Sustained pain hypersensitivity in the stressed colon: Role of mast cell-derived nerve growth factor-mediated enteric synaptic plasticity. Neurogastroenterol Motil 2018; 30:e13430. [PMID: 30069980 DOI: 10.1111/nmo.13430] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 05/23/2018] [Accepted: 06/22/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND Sustained pain hypersensitivity is the hallmark of stressed colon which could be partially explained by central sensitization with synaptic plasticity, the key mechanism of memory. We previously identified that synaptic plasticity of enteric nerve system (ENS) contributed to peripheral pain maintaining in the gut. However, the mechanisms of enteric "memory" formation remain elusive. METHODS In this study, rats were exposed to water avoidance stress (WAS) or sham stress (SS), with cromolyn sodium or physiological saline injected intraperitoneally 30 minutes before stress every day. The abdominal withdrawal reflex scores, mesenteric afferent nerve activity, enteric neural c-fos expression, and enteric synaptic plasticity were assessed, and mast cell infiltration and degranulation. Furthermore, colonic mucosal mediators-induced enteric synaptic plasticity and the role of mast cell-derived nerve growth factor (NGF), tryptase, and histamine were investigated via ex vivo longitudinal muscle-myenteric plexus (LMMP) organotypic culture. KEY RESULTS It is shown that mast cell stabilizing inhibited WAS-induced visceral hypersensitivity through enhancing visceral pain threshold, decreasing spontaneous and distention-induced mesenteric afferent firing, and downregulating enteric neural activation (c-fos). Importantly, WAS led to evident enteric synaptic plasticity, but decreased by cromolyn. Water avoidance stress-derived mucosal supernatants markedly enhanced the c-fos expression and enteric synaptic plasticity in LMMP tissues, which could be eliminated by mast cell inhibition or NGF neutralization, but not tryptase or histamine blocking. CONCLUSIONS & INFERENCES In conclusion, mast cells/NGF pathway may be the key regulator of synaptic plasticity of ENS and participate in the formation of chronic stress-induced sustained visceral hypersensitivity.
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Affiliation(s)
- L Zhang
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - J Song
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - T Bai
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - R Wang
- Department of Gerontology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - X Hou
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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11
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Gut microbiota regulates maturation of the adult enteric nervous system via enteric serotonin networks. Proc Natl Acad Sci U S A 2018; 115:6458-6463. [PMID: 29866843 PMCID: PMC6016808 DOI: 10.1073/pnas.1720017115] [Citation(s) in RCA: 274] [Impact Index Per Article: 45.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The gut microbiota affects several physiological processes, including gut motility. Here we observed that germ-free mice have an immature enteric nervous system (ENS) that is normalized upon colonization with a normal microbiota. We identified the mechanism of communication between the microbiota and enteric neurons as the initiation of serotonin release and subsequent activation of the 5-HT4 receptor. This demonstrates a strong interaction between the microbiota and the ENS and indicates potential mechanisms linking microbial dysbiosis to gastrointestinal disorders. The ability to modulate the microbiota, e.g., by diet, will open new perspectives of research in neurogastroenterology. The enteric nervous system (ENS) is crucial for essential gastrointestinal physiologic functions such as motility, fluid secretion, and blood flow. The gut is colonized by trillions of bacteria that regulate host production of several signaling molecules including serotonin (5-HT) and other hormones and neurotransmitters. Approximately 90% of 5-HT originates from the intestine, and activation of the 5-HT4 receptor in the ENS has been linked to adult neurogenesis and neuroprotection. Here, we tested the hypothesis that the gut microbiota could induce maturation of the adult ENS through release of 5-HT and activation of 5-HT4 receptors. Colonization of germ-free mice with a microbiota from conventionally raised mice modified the neuroanatomy of the ENS and increased intestinal transit rates, which was associated with neuronal and mucosal 5-HT production and the proliferation of enteric neuronal progenitors in the adult intestine. Pharmacological modulation of the 5-HT4 receptor, as well as depletion of endogenous 5-HT, identified a mechanistic link between the gut microbiota and maturation of the adult ENS through the release of 5-HT and activation of the 5-HT4 receptor. Taken together, these findings show that the microbiota modulates the anatomy of the adult ENS in a 5-HT–dependent fashion with concomitant changes in intestinal transit.
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12
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Becker L, Nguyen L, Gill J, Kulkarni S, Pasricha PJ, Habtezion A. Age-dependent shift in macrophage polarisation causes inflammation-mediated degeneration of enteric nervous system. Gut 2018; 67:827-836. [PMID: 28228489 PMCID: PMC5565713 DOI: 10.1136/gutjnl-2016-312940] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 12/21/2016] [Accepted: 01/27/2017] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The enteric nervous system (ENS) undergoes neuronal loss and degenerative changes with age. The cause of this neurodegeneration is poorly understood. Muscularis macrophages residing in close proximity to enteric ganglia maintain neuromuscular function via direct crosstalk with enteric neurons and have been implicated in the pathogenesis of GI motility disorders like gastroparesis and postoperative ileus. The aim of this study was to assess whether ageing causes alterations in macrophage phenotype that contributes to age-related degeneration of the ENS. DESIGN Longitudinal muscle and myenteric plexus from small intestine of young, mid-aged and old mice were dissected and prepared for whole mount immunostaining, flow cytometry, Luminex immunoassays, western blot analysis, enteric neural stem cell (ENSC) isolation or conditioned media. Bone marrow derived macrophages were prepared and polarised to classic (M1) or alternative (M2) activation states. Markers for macrophage phenotype were measured using quantitative RT-PCR. RESULTS Ageing causes a shift in macrophage polarisation from anti-inflammatory 'M2' to proinflammatory 'M1' that is associated with a rise in cytokines and immune cells in the ENS. This phenotypic shift is associated with a neural response to inflammatory signals, increase in apoptosis and loss of enteric neurons and ENSCs, and delayed intestinal transit. An age-dependent decrease in expression of the transcription factor FoxO3, a known longevity gene, contributes to the loss of anti-inflammatory behaviour in macrophages of old mice, and FoxO3-deficient mice demonstrate signs of premature ageing of the ENS. CONCLUSIONS A shift by macrophages towards a proinflammatory phenotype with ageing causes inflammation-mediated degeneration of the ENS.
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Affiliation(s)
- Laren Becker
- Department of Medicine, Division of Gastroenterology and Hepatology, Stanford University, Stanford, California,Corresponding Authors Contact Information: Laren Becker, MD, PhD, Stanford University School of Medicine, Department of Medicine, Division of Gastroenterology and Hepatology, 300 Pasteur Drive, Stanford, CA 94305, Tel: 650 721 1264, Fax: 650 723 5488, . Aida Habtezion, MD MSc, Stanford University School of Medicine, Department of Medicine, Division of Gastroenterology and Hepatology, 300 Pasteur Drive, Stanford, CA 94305, Tel: 650 725 6511, Fax: 650 723 5488,
| | - Linh Nguyen
- Department of Medicine, Division of Gastroenterology and Hepatology, Stanford University, Stanford, California
| | - Jaspreet Gill
- Department of Medicine, Division of Gastroenterology and Hepatology, Stanford University, Stanford, California
| | - Subhash Kulkarni
- Department of Medicine, Division of Gastroenterology and Hepatology, Johns Hopkins University, Baltimore, Maryland
| | - Pankaj Jay Pasricha
- Department of Medicine, Division of Gastroenterology and Hepatology, Johns Hopkins University, Baltimore, Maryland
| | - Aida Habtezion
- Department of Medicine, Division of Gastroenterology and Hepatology, Stanford University, Stanford, California,Corresponding Authors Contact Information: Laren Becker, MD, PhD, Stanford University School of Medicine, Department of Medicine, Division of Gastroenterology and Hepatology, 300 Pasteur Drive, Stanford, CA 94305, Tel: 650 721 1264, Fax: 650 723 5488, . Aida Habtezion, MD MSc, Stanford University School of Medicine, Department of Medicine, Division of Gastroenterology and Hepatology, 300 Pasteur Drive, Stanford, CA 94305, Tel: 650 725 6511, Fax: 650 723 5488,
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13
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Zhang Y, Seid K, Obermayr F, Just L, Neckel PH. Activation of Wnt Signaling Increases Numbers of Enteric Neurons Derived From Neonatal Mouse and Human Progenitor Cells. Gastroenterology 2017; 153:154-165.e9. [PMID: 28359679 DOI: 10.1053/j.gastro.2017.03.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 02/17/2017] [Accepted: 03/14/2017] [Indexed: 12/31/2022]
Abstract
BACKGROUND & AIMS Neural stem and progenitor cells from the enteric nervous system (ENS) might serve as a source of cells for treatment of neurogastrointestinal disorders. Before we can use these cells, we must increase our understanding of the signaling mechanisms that regulate proliferation and differentiation. We systematically evaluated the effects of canonical Wnt signaling on proliferation and differentiation of cultured ENS progenitor cells from neonatal mice and humans. METHODS We isolated ENS progenitors from tunica muscularis of the small intestine of newborn (postnatal day 0) wild-type C57BL/6 mice as well as from Wnt1-Cre2 reporter mice. We also obtained intestinal tissue samples from infants (2 and 7 months old) undergoing surgery for imperforate anus or focal intestinal perforation and isolated ENS cells. ENS cells were cultured under proliferation conditions leading to formation of 3-dimensional spheres, which we activated with Wnt3a and SB216763 in order to activate the β-catenin-dependent canonical Wnt pathway. We used immunoblot and quantitative polymerase chain reaction to evaluate the molecular response to Wnt stimuli and immunohistochemistry, proliferation, and cell death assays to identify new neurons. RESULTS In proliferating enterospheres derived from ENS progenitor cells, we verified the expression of Wnt receptors frizzled 1-10 and the co-receptors low-density lipoprotein receptor-related proteins 5 and 6. Pharmacologic stimulation with Wnt agonists led to intracellular accumulation of Wnt-dependent β-catenin and up-regulated expression of known Wnt target genes axin2, lef1, and lgr5. Activation of the canonical Wnt pathway promoted growth of ENS cell spheres during cell expansion and increased the number of newborn neurons derived from mouse and human progenitor cells. CONCLUSIONS In studies of human and mouse ENS progenitors, we found activation of the Wnt signaling pathway to promote neurogenesis of the ENS in vitro. The neurogenic effect of Wnt agonists on ENS progenitors supports their use in generation of cell pools for autologous cell replacement therapies.
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Affiliation(s)
- Ying Zhang
- Institute of Clinical Anatomy and Cell Analysis, University of Tübingen, Tübingen, Germany
| | - Karin Seid
- Institute of Clinical Anatomy and Cell Analysis, University of Tübingen, Tübingen, Germany
| | - Florian Obermayr
- Department of Pediatric Surgery, University Children's Hospital Tübingen, Germany
| | - Lothar Just
- Institute of Clinical Anatomy and Cell Analysis, University of Tübingen, Tübingen, Germany
| | - Peter H Neckel
- Institute of Clinical Anatomy and Cell Analysis, University of Tübingen, Tübingen, Germany.
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14
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Belkind-Gerson J, Graham HK, Reynolds J, Hotta R, Nagy N, Cheng L, Kamionek M, Shi HN, Aherne CM, Goldstein AM. Colitis promotes neuronal differentiation of Sox2+ and PLP1+ enteric cells. Sci Rep 2017; 7:2525. [PMID: 28566702 PMCID: PMC5451421 DOI: 10.1038/s41598-017-02890-y] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 04/19/2017] [Indexed: 12/31/2022] Open
Abstract
Mechanisms mediating adult enteric neurogenesis are largely unknown. Using inflammation-associated neurogenesis models and a transgenic approach, we aimed to understand the cell-source for new neurons in infectious and inflammatory colitis. Dextran sodium sulfate (DSS) and Citrobacter rodentium colitis (CC) was induced in adult mice and colonic neurons were quantified. Sox2GFP and PLP1GFP mice confirmed the cell-type specificity of these markers. Sox2CreER:YFP and PLP1creER:tdT mice were used to determine the fate of these cells after colitis. Sox2 expression was investigated in colonic neurons of human patients with Clostridium difficile or ulcerative colitis. Both DSS and CC led to increased colonic neurons. Following colitis in adult Sox2CreER:YFP mice, YFP initially expressed predominantly by glia becomes expressed by neurons following colitis, without observable DNA replication. Similarly in PLP1CreER:tdT mice, PLP1 cells that co-express S100b but not RET also give rise to neurons following colitis. In human colitis, Sox2-expressing neurons increase from 1–2% to an average 14% in colitis. The new neurons predominantly express calretinin, thus appear to be excitatory. These results suggest that colitis promotes rapid enteric neurogenesis in adult mice and humans through differentiation of Sox2- and PLP1-expressing cells, which represent enteric glia and/or neural progenitors. Further defining neurogenesis will improve understanding and treatment of injury-associated intestinal motility/sensory disorders.
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Affiliation(s)
- Jaime Belkind-Gerson
- Neurogastroenterology Program, Digestive Health Institute, Children's Hospital Colorado University of Colorado, Aurora, USA.
| | - Hannah K Graham
- Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Justin Reynolds
- Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Ryo Hotta
- Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Nandor Nagy
- Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Lily Cheng
- Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Michal Kamionek
- Pathology department, Carolinas Healthcare System, Charlotte, NC, USA
| | - Hai Ning Shi
- Neurogastroenterology Program, Digestive Health Institute, Children's Hospital Colorado University of Colorado, Aurora, USA
| | - Carol M Aherne
- Department of Anesthesiology, Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, USA
| | - Allan M Goldstein
- Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.,Center for Neurointestinal Health, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
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15
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Kulkarni S, Micci MA, Leser J, Shin C, Tang SC, Fu YY, Liu L, Li Q, Saha M, Li C, Enikolopov G, Becker L, Rakhilin N, Anderson M, Shen X, Dong X, Butte MJ, Song H, Southard-Smith EM, Kapur RP, Bogunovic M, Pasricha PJ. Adult enteric nervous system in health is maintained by a dynamic balance between neuronal apoptosis and neurogenesis. Proc Natl Acad Sci U S A 2017; 114:E3709-E3718. [PMID: 28420791 PMCID: PMC5422809 DOI: 10.1073/pnas.1619406114] [Citation(s) in RCA: 162] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
According to current dogma, there is little or no ongoing neurogenesis in the fully developed adult enteric nervous system. This lack of neurogenesis leaves unanswered the question of how enteric neuronal populations are maintained in adult guts, given previous reports of ongoing neuronal death. Here, we confirm that despite ongoing neuronal cell loss because of apoptosis in the myenteric ganglia of the adult small intestine, total myenteric neuronal numbers remain constant. This observed neuronal homeostasis is maintained by new neurons formed in vivo from dividing precursor cells that are located within myenteric ganglia and express both Nestin and p75NTR, but not the pan-glial marker Sox10. Mutation of the phosphatase and tensin homolog gene in this pool of adult precursors leads to an increase in enteric neuronal number, resulting in ganglioneuromatosis, modeling the corresponding disorder in humans. Taken together, our results show significant turnover and neurogenesis of adult enteric neurons and provide a paradigm for understanding the enteric nervous system in health and disease.
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Affiliation(s)
- Subhash Kulkarni
- Center for Neurogastroenterology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Maria-Adelaide Micci
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, TX 77555
| | - Jenna Leser
- Center for Neurogastroenterology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Changsik Shin
- Department of Microbiology and Immunology, College of Medicine, Pennsylvania State University, Hershey, PA 17033
| | | | - Ya-Yuan Fu
- Center for Neurogastroenterology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Liansheng Liu
- Center for Neurogastroenterology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Qian Li
- Center for Neurogastroenterology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Monalee Saha
- Center for Neurogastroenterology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Cuiping Li
- Center for Neurogastroenterology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Grigori Enikolopov
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724
- Center for Developmental Genetics, Department of Anesthesiology, Stony Brook University, Stony Brook, NY 11794
| | - Laren Becker
- Division of Gastroenterology, Stanford University School of Medicine, Stanford, CA 94305
| | - Nikolai Rakhilin
- Department of Biomedical Engineering, Duke University, Durham, NC 27708
- School of Electrical and Computer Engineering, Cornell University, Ithaca, NY 14853
| | - Michael Anderson
- Solomon H. Snyder Department of Neuroscience, The Johns Hopkins University School of Medicine, Baltimore, MD 21205
- Department of Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD 21205
- Department of Dermatology, Center for Sensory Biology, The Johns Hopkins University, School of Medicine, Baltimore, MD 21205
- Howard Hughes Medical Institute, The Johns Hopkins University, School of Medicine, Baltimore, MD 21205
| | - Xiling Shen
- Department of Biomedical Engineering, Duke University, Durham, NC 27708
- School of Electrical and Computer Engineering, Cornell University, Ithaca, NY 14853
| | - Xinzhong Dong
- Solomon H. Snyder Department of Neuroscience, The Johns Hopkins University School of Medicine, Baltimore, MD 21205
- Department of Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD 21205
- Department of Dermatology, Center for Sensory Biology, The Johns Hopkins University, School of Medicine, Baltimore, MD 21205
- Howard Hughes Medical Institute, The Johns Hopkins University, School of Medicine, Baltimore, MD 21205
| | - Manish J Butte
- Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA 90095
| | - Hongjun Song
- Solomon H. Snyder Department of Neuroscience, The Johns Hopkins University School of Medicine, Baltimore, MD 21205
- Institute for Cellular Engineering, Department of Neurology, The Johns Hopkins University, School of Medicine, Baltimore, MD 21205
| | | | - Raj P Kapur
- Department of Laboratories, Seattle Children's Hospital, Seattle, WA 98105
| | - Milena Bogunovic
- Department of Microbiology and Immunology, College of Medicine, Pennsylvania State University, Hershey, PA 17033
| | - Pankaj J Pasricha
- Center for Neurogastroenterology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21205;
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16
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Cheng LS, Graham HK, Pan WH, Nagy N, Carreon-Rodriguez A, Goldstein AM, Hotta R. Optimizing neurogenic potential of enteric neurospheres for treatment of neurointestinal diseases. J Surg Res 2016; 206:451-459. [PMID: 27884342 DOI: 10.1016/j.jss.2016.08.035] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 06/30/2016] [Accepted: 08/04/2016] [Indexed: 11/16/2022]
Abstract
BACKGROUND Enteric neurospheres derived from postnatal intestine represent a promising avenue for cell replacement therapy to treat Hirschsprung disease and other neurointestinal diseases. We describe a simple method to improve the neuronal yield of spontaneously formed gut-derived neurospheres. MATERIALS AND METHODS Enteric neurospheres were formed from the small and large intestines of mouse and human subjects. Neurosphere size, neural crest cell content, cell migration, neuronal differentiation, and neuronal proliferation in culture were analyzed. The effect of supplemental neurotrophic factors, including glial cell line-derived neurotrophic factor (GDNF) and endothelin-3, was also assessed. RESULTS Mouse small intestine-derived neurospheres contained significantly more P75-expressing neural crest-derived cells (49.9 ± 15.3% versus 21.6 ± 11.9%, P < 0.05) and gave rise to significantly more Tuj1-expressing neurons than colon-derived neurospheres (69.9 ± 8.6% versus 46.2 ± 15.6%, P < 0.05). A similar pattern was seen in neurospheres isolated from human small and large intestine (32.6 ± 17.5% versus 10.2 ± 8.2% neural crest cells, P < 0.05; 29.7 ± 16.4% versus 16.0 ± 13.5% enteric neurons, P < 0.05). The addition of GDNF to the culture media further improved the neurogenic potential of small intestinal neurospheres (75.9 ± 4.0% versus 67.8 ± 5.8%, P < 0.05) whereas endothelin-3 had no effect. CONCLUSIONS Enteric neurospheres formed from small intestine and supplemented with GDNF yield an enriched population of neural crest-derived progenitor cells and give rise to a high density of enteric neurons.
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Affiliation(s)
- Lily S Cheng
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit St., Boston, MA, 02114, USA.,Department of Surgery, University of California San Francisco, 500 Parnassus Ave., San Francisco, CA, 94143, USA
| | - Hannah K Graham
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit St., Boston, MA, 02114, USA
| | - Wei Hua Pan
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit St., Boston, MA, 02114, USA.,Department of Pediatric Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 280 Chongqing S Rd, Huangpu, Shanghai, China
| | - Nandor Nagy
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit St., Boston, MA, 02114, USA.,Department of Anatomy, Histology and Embryology, Faculty of Medicine, Semmelweis University, Tuzolto St. 58, Budapest 1094, Hungary
| | - Alfonso Carreon-Rodriguez
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit St., Boston, MA, 02114, USA.,Laboratorio de Genética y Biomarcadores, Instituto Nacional de Salud Pública, Av Universidad 655, Santa María Ahuacatitlán, 62100 Cuernavaca, Mor., Mexico
| | - Allan M Goldstein
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit St., Boston, MA, 02114, USA
| | - Ryo Hotta
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit St., Boston, MA, 02114, USA
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17
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Brosens E, Burns AJ, Brooks AS, Matera I, Borrego S, Ceccherini I, Tam PK, García-Barceló MM, Thapar N, Benninga MA, Hofstra RMW, Alves MM. Genetics of enteric neuropathies. Dev Biol 2016; 417:198-208. [PMID: 27426273 DOI: 10.1016/j.ydbio.2016.07.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 07/13/2016] [Accepted: 07/13/2016] [Indexed: 12/23/2022]
Abstract
Abnormal development or disturbed functioning of the enteric nervous system (ENS), the intrinsic innervation of the gastrointestinal tract, is associated with the development of neuropathic gastrointestinal motility disorders. Here, we review the underlying molecular basis of these disorders and hypothesize that many of them have a common defective biological mechanism. Genetic burden and environmental components affecting this common mechanism are ultimately responsible for disease severity and symptom heterogeneity. We believe that they act together as the fulcrum in a seesaw balanced with harmful and protective factors, and are responsible for a continuum of symptoms ranging from neuronal hyperplasia to absence of neurons.
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Affiliation(s)
- Erwin Brosens
- Department of Clinical Genetics, Erasmus University Medical Centre - Sophia Children's Hospital, Rotterdam, The Netherlands.
| | - Alan J Burns
- Department of Clinical Genetics, Erasmus University Medical Centre - Sophia Children's Hospital, Rotterdam, The Netherlands; Stem Cells and Regenerative Medicine, Birth Defects Research Centre, UCL Institute of Child Health, London, UK
| | - Alice S Brooks
- Department of Clinical Genetics, Erasmus University Medical Centre - Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Ivana Matera
- UOC Medical Genetics, Istituto Giannina Gaslini, Genova, Italy
| | - Salud Borrego
- Department of Genetics, Reproduction and Fetal Medicine, Institute of Biomedicine of Seville (IBIS), Seville, Spain; Centre for Biomedical Network Research on Rare Diseases (CIBERER), Seville, Spain
| | | | - Paul K Tam
- Division of Paediatric Surgery, Department of Surgery, Li Ka Shing Faculty of Medicine of the University of Hong Kong, Hong Kong, China
| | - Maria-Mercè García-Barceló
- State Key Laboratory of Brain and Cognitive Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China; Centre for Reproduction, Development, and Growth, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Nikhil Thapar
- Stem Cells and Regenerative Medicine, Birth Defects Research Centre, UCL Institute of Child Health, London, UK
| | - Marc A Benninga
- Pediatric Gastroenterology, Emma Children's Hospital/Academic Medical Center, Amsterdam, The Netherlands
| | - Robert M W Hofstra
- Department of Clinical Genetics, Erasmus University Medical Centre - Sophia Children's Hospital, Rotterdam, The Netherlands; Stem Cells and Regenerative Medicine, Birth Defects Research Centre, UCL Institute of Child Health, London, UK
| | - Maria M Alves
- Department of Clinical Genetics, Erasmus University Medical Centre - Sophia Children's Hospital, Rotterdam, The Netherlands
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18
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Organotypic Cultures as a Model to Study Adult Neurogenesis in CNS Disorders. Stem Cells Int 2016; 2016:3540568. [PMID: 27127518 PMCID: PMC4835641 DOI: 10.1155/2016/3540568] [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] [Received: 12/17/2015] [Accepted: 03/22/2016] [Indexed: 12/02/2022] Open
Abstract
Neural regeneration resides in certain specific regions of adult CNS. Adult neurogenesis occurs throughout life, especially from the subgranular zone of hippocampus and the subventricular zone, and can be modulated in physiological and pathological conditions. Numerous techniques and animal models have been developed to demonstrate and observe neural regeneration but, in order to study the molecular and cellular mechanisms and to characterize multiple types of cell populations involved in the activation of neurogenesis and gliogenesis, investigators have to turn to in vitro models. Organotypic cultures best recapitulate the 3D organization of the CNS and can be explored taking advantage of many techniques. Here, we review the use of organotypic cultures as a reliable and well defined method to study the mechanisms of neurogenesis under normal and pathological conditions. As an example, we will focus on the possibilities these cultures offer to study the pathophysiology of diseases like Alzheimer disease, Parkinson's disease, and cerebral ischemia.
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19
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Hotta R, Cheng L, Graham HK, Nagy N, Belkind-Gerson J, Mattheolabakis G, Amiji MM, Goldstein AM. Delivery of enteric neural progenitors with 5-HT4 agonist-loaded nanoparticles and thermosensitive hydrogel enhances cell proliferation and differentiation following transplantation in vivo. Biomaterials 2016; 88:1-11. [PMID: 26922325 DOI: 10.1016/j.biomaterials.2016.02.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 02/12/2016] [Accepted: 02/15/2016] [Indexed: 12/29/2022]
Abstract
Cell therapy offers an innovative approach for treating enteric neuropathies. Postnatal gut-derived enteric neural stem/progenitor cells (ENSCs) represent a potential autologous source, but have a limited capacity for proliferation and neuronal differentiation. Since serotonin (5-HT) promotes enteric neuronal growth during embryonic development, we hypothesized that serotonin receptor agonism would augment growth of neurons from transplanted ENSCs. Postnatal ENSCs were isolated from 2 to 4 week-old mouse colon and cultured with 5-HT4 receptor agonist (RS67506)-loaded liposomal nanoparticles. ENSCs were co-cultured with mouse colon explants in the presence of RS67506-loaded (n = 3) or empty nanoparticles (n = 3). ENSCs were also transplanted into mouse rectum in vivo with RS67506-loaded (n = 8) or blank nanoparticles (n = 4) confined in a thermosensitive hydrogel, Pluronic F-127. Neuronal density and proliferation were analyzed immunohistochemically. Cultured ENSCs gave rise to significantly more neurons in the presence of RS67506-loaded nanoparticles. Similarly, colon explants had significantly increased neuronal density when RS67506-loaded nanoparticles were present. Finally, following in vivo cell delivery, co-transplantation of ENSCs with 5-HT4 receptor agonist-loaded nanoparticles led to significantly increased neuronal density and proliferation. We conclude that optimization of postnatal ENSCs can support their use in cell-based therapies for neurointestinal diseases.
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Affiliation(s)
- Ryo Hotta
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Lily Cheng
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.,Department of Surgery, University of California San Francisco, San Francisco, CA, USA
| | - Hannah K Graham
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Nandor Nagy
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.,Department of Human Morphology and Developmental Biology, Faculty of Medicine, Semmelweis University, Budapest, Hungary
| | - Jaime Belkind-Gerson
- Department of Pediatrics, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - George Mattheolabakis
- Department of Pharmaceutical Sciences, School of Pharmacy, Bouve College of Health Sciences, Northeastern University, MA, USA
| | - Mansoor M Amiji
- Department of Pharmaceutical Sciences, School of Pharmacy, Bouve College of Health Sciences, Northeastern University, MA, USA
| | - Allan M Goldstein
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
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20
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Comparative Microarray Analysis of Proliferating and Differentiating Murine ENS Progenitor Cells. Stem Cells Int 2015; 2016:9695827. [PMID: 26697082 PMCID: PMC4677255 DOI: 10.1155/2016/9695827] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 07/12/2015] [Indexed: 11/17/2022] Open
Abstract
Postnatal neural progenitor cells of the enteric nervous system are a potential source for future cell replacement therapies of developmental dysplasia like Hirschsprung's disease. However, little is known about the molecular mechanisms driving the homeostasis and differentiation of this cell pool. In this work, we conducted Affymetrix GeneChip experiments to identify differences in gene regulation between proliferation and early differentiation of enteric neural progenitors from neonatal mice. We detected a total of 1333 regulated genes that were linked to different groups of cellular mechanisms involved in cell cycle, apoptosis, neural proliferation, and differentiation. As expected, we found an augmented inhibition in the gene expression of cell cycle progression as well as an enhanced mRNA expression of neuronal and glial differentiation markers. We further found a marked inactivation of the canonical Wnt pathway after the induction of cellular differentiation. Taken together, these data demonstrate the various molecular mechanisms taking place during the proliferation and early differentiation of enteric neural progenitor cells.
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Expression of the Wnt Receptor Frizzled-4 in the Human Enteric Nervous System of Infants. Stem Cells Int 2015; 2016:9076823. [PMID: 26697080 PMCID: PMC4677256 DOI: 10.1155/2016/9076823] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 07/12/2015] [Indexed: 12/22/2022] Open
Abstract
The Wnt signalling pathway plays a crucial role in the development of the nervous system. This signalling cascade is initiated upon binding of the secreted Wnt ligand to a member of the family of frizzled receptors. In the present study, we analysed the presence of frizzled-4 in the enteric nervous system of human infants. Frizzled-4 could be identified by immunohistochemistry in a subpopulation of enteric neuronal and glial cells in the small and large intestine. Detection of frizzled-4 in the tunica muscularis by RT-PCR confirmed this receptor's expression on the mRNA level. Interestingly, we observed distinct cell populations that co-expressed frizzled-4 with the intermediate filament protein nestin and the neurotrophin receptor p75NTR, which have been reported to be expressed in neural progenitor cells. Flow cytometry analysis revealed that 60% of p75NTR positive cells of the tunica muscularis were positive for frizzled-4. Additionally, in pathological samples of Hirschsprung's disease, the expression of this Wnt receptor correlated with the number of myenteric ganglion cells and decreased from normoganglionic to aganglionic areas of large intestine. The expression pattern of frizzled-4 indicates that this Wnt receptor could be involved in postnatal development and/or function of the enteric nervous system.
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Abstract
BACKGROUND The intestine is known to contain enteric neuronal progenitors, but their precise identity and the mechanisms that activate them remain unknown. Based on the evidence for the neurogenic role of serotonin (5-HT) in the postnatal gut and the observation of enteric neuronal hyperplasia in inflammatory bowel disease, we hypothesized that colitis induces a neurogenic response through 5-HT4 receptor signaling. METHODS We examined the effects of 5-HT4 agonism on colonic neurogenesis and gliogenesis in vitro and in vivo in adult mice using dextran sodium sulfate to experimentally induce colitis. RESULTS In vitro, 5-HT4 agonism led to increased neuronal proliferation and density. Induction of experimental colitis in vivo similarly resulted in increased numbers of myenteric neurons, and this was inhibited by 5-HT4 antagonism. Interestingly, both in vitro and in vivo, 5-HT4 signaling increased glial cell proliferation but did not increase glial cell numbers, leading us to hypothesize that glia may give rise to neurons. After induction of colitis in normal, Nestin-GFP and Sox2-GFP transgenic mice, it was revealed that multiple glial markers (Sox2, Nestin, and CD49b) became strongly expressed by enteric neurons. Immunoselected enteric glia were found to give rise to neurons in culture, and this was inhibited in the presence of 5-HT4 blockade. Finally, isolated glia gave rise to a neuronal network upon transplantation into aganglionic embryonic avian hindgut. CONCLUSIONS These results show that colitis promotes enteric neurogenesis in the adult colon through a serotonin-dependent mechanism that drives glial cells to transdifferentiate into neurons.
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23
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Mavrantoni A, Thallmair V, Leitner MG, Schreiber DN, Oliver D, Halaszovich CR. A method to control phosphoinositides and to analyze PTEN function in living cells using voltage sensitive phosphatases. Front Pharmacol 2015; 6:68. [PMID: 25873899 PMCID: PMC4379879 DOI: 10.3389/fphar.2015.00068] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 03/14/2015] [Indexed: 11/20/2022] Open
Abstract
Voltage sensitive phosphatases (VSPs), including engineered voltage sensitive PTEN, are excellent tools to rapidly and reversibly alter the phosphoinositide (PI) content of the plasma membrane in vivo and study the tumor suppressor PTEN. However, widespread adoption of these tools is hampered by the requirement for electrophysiological instrumentation to control the activity of VSPs. Additionally, monitoring and quantifying the PI changes in living cells requires sophisticated microscopy equipment and image analysis. Here we present methods that bypass these obstacles. First, we explore technically simple means for activation of VSPs via extracellularly applied agents or light. Secondly, we characterize methods to monitor PI(4,5)P2 and PI(3,4,5)P3 levels using fluorescence microscopy or photometry in conjunction with translocation or FRET based PI probes, respectively. We then demonstrate the application of these techniques by characterizing the effect of known PTEN mutations on its enzymatic activity, analyzing the effect of PTEN inhibitors, and detecting in real time rapid inhibition of protein kinase B following depletion of PI(3,4,5)P3. Thus, we established an approach that does not only allow for rapidly manipulating and monitoring PI(4,5)P2 and PI(3,4,5)P3 levels in a population of cells, but also facilitates the study of PTEN mutants and pharmacological targeting in mammalian cells.
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Affiliation(s)
- Angeliki Mavrantoni
- Department of Neurophysiology, Institute of Physiology and Pathophysiology, Philipps-Universität Marburg Marburg, Germany
| | - Veronika Thallmair
- Department of Neurophysiology, Institute of Physiology and Pathophysiology, Philipps-Universität Marburg Marburg, Germany
| | - Michael G Leitner
- Department of Neurophysiology, Institute of Physiology and Pathophysiology, Philipps-Universität Marburg Marburg, Germany
| | - Daniela N Schreiber
- Department of Neurophysiology, Institute of Physiology and Pathophysiology, Philipps-Universität Marburg Marburg, Germany
| | - Dominik Oliver
- Department of Neurophysiology, Institute of Physiology and Pathophysiology, Philipps-Universität Marburg Marburg, Germany
| | - Christian R Halaszovich
- Department of Neurophysiology, Institute of Physiology and Pathophysiology, Philipps-Universität Marburg Marburg, Germany
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Coelho-Aguiar JDM, Bon-Frauches AC, Gomes ALT, Veríssimo CP, Aguiar DP, Matias D, Thomasi BBDM, Gomes AS, Brito GADC, Moura-Neto V. The enteric glia: identity and functions. Glia 2015; 63:921-35. [PMID: 25703790 DOI: 10.1002/glia.22795] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 01/07/2015] [Indexed: 01/04/2023]
Abstract
Enteric glial cells were first described at the end of the 19th century, but they attracted more interest from researchers only in the last decades of the 20th. Although, they have a different embryological origin, the enteric GLIA share many characteristics with astrocytes, the main glial cell type of the central nervous system (CNS), such as in their expression of the same markers and in their functions. Here we review the construction of the enteric nervous system (ENS), with a focus on enteric glia, and also the main studies that have revealed the action of enteric glia in different aspects of gastrointestinal tract homeostasis, such as in the intestinal barrier, in communications with neurons, and in their action as progenitor cells. We also discuss recent discoveries about the roles of enteric glia in different disorders that affect the ENS, such as degenerative pathologies including Parkinson's and prion diseases, and in cases of intestinal diseases and injury.
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Affiliation(s)
- Juliana de Mattos Coelho-Aguiar
- Instituto Estadual do Cérebro Paulo Niemeyer, Secretaria de Estado de Saúde do Rio de Janeiro - SES/RJ, Rio de Janeiro, Brazil; Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Nishikawa R, Hotta R, Shimojima N, Shibata S, Nagoshi N, Nakamura M, Matsuzaki Y, Okano HJ, Kuroda T, Okano H, Morikawa Y. Migration and differentiation of transplanted enteric neural crest-derived cells in murine model of Hirschsprung's disease. Cytotechnology 2014; 67:661-70. [PMID: 25230796 DOI: 10.1007/s10616-014-9754-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Accepted: 06/07/2014] [Indexed: 11/28/2022] Open
Abstract
Stem cell therapy offers the potential of rebuilding the enteric nervous system (ENS) in the aganglionic bowel of patients with Hirschsprung's disease. P0-Cre/Floxed-EGFP mice in which neural crest-derived cells express EGFP were used to obtain ENS stem/progenitor cells. ENS stem/progenitor cells were transplanted into the bowel of Ret(-/-) mouse, an animal model of Hirschsprung's disease. Immunohistochemical analysis was performed to determine whether grafted cells gave rise to neurons in the recipient bowel. EGFP expressing neural crest-derived cells accounted for 7.01 ± 2.52 % of total cells of gastrointestinal tract. ENS stem/progenitor cells were isolated using flow cytometry and expanded as neurosphere-like bodies (NLBs) in a serum-free culture condition. Some cells in NLBs expressed neural crest markers, p75 and Sox10 and neural stem/progenitor cells markers, Nestin and Musashi1. Multipotency of isolated ENS stem/progenitor cells was determined as they differentiated into neurons, glial cells, and myofibloblasts in culture. When co-cultured with explants of hindgut of Ret(-/-) mice, ENS stem/progenitor cells migrated into the aganglionic bowel and gave rise to neurons. ENS stem/progenitor cells used in this study appear to be clinically relevant donor cells in cell therapy to treat Hirschsprung's disease capable of colonizing the affected bowel and giving rise to neurons.
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Affiliation(s)
- Ryuhei Nishikawa
- Department of Pediatric Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
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Abstract
The enteric nervous system is vulnerable to a range of congenital and acquired disorders that disrupt the function of its neurons or lead to their loss. The resulting enteric neuropathies are some of the most challenging clinical conditions to manage. Neural stem cells offer the prospect of a cure given their potential ability to replenish missing or dysfunctional neurons. This article discusses diseases that might be targets for stem cell therapies and the barriers that could limit treatment application. We explore various sources of stem cells and the proof of concept for their use. The critical steps that remain to be addressed before these therapies can be used in patients are also discussed. Key milestones include the harvesting of neural stem cells from the human gut and the latest in vivo transplantation studies in animals. The tremendous progress in the field has brought experimental studies exploring the potential of stem cell therapies for the management of enteric neuropathies to the cusp of clinical application.
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Affiliation(s)
- Alan J Burns
- Neural Development and Gastroenterology Units, Birth Defects Research Centre, UCL Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Nikhil Thapar
- 1] Neural Development and Gastroenterology Units, Birth Defects Research Centre, UCL Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK. [2] Division of Neurogastroenterology and Motility, Department of Paediatric Gastroenterology, Great Ormond Street Hospital, Great Ormond Street, London WC1N 3JH, UK
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27
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Abstract
Neurotransmitter gamma-aminobutiric acid (GABA) through ionotropic GABAA and metabotropic GABAB receptors plays key roles in modulating the development, plasticity and function of neuronal networks. GABA is inhibitory in mature neurons but excitatory in immature neurons, neuroblasts and neural stem/progenitor cells (NSCs/NPCs). The switch from excitatory to inhibitory occurs following the development of glutamatergic synaptic input and results from the dynamic changes in the expression of Na+/K+/2Cl- co-transporter NKCC1 driving Cl- influx and neuron-specific K+/Cl- co-transporter KCC2 driving Cl- efflux. The developmental transition of KCC2 expression is regulated by Disrupted-in-Schizophrenia 1 (DISC1) and brain-derived neurotrophic factor (BDNF) signaling. The excitatory GABA signaling during early neurogenesis is important to the activity/experience-induced regulation of NSC quiescence, NPC proliferation, neuroblast migration and newborn neuronal maturation/functional integration. The inhibitory GABA signaling allows for the sparse and static functional networking essential for learning/memory development and maintenance.
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Affiliation(s)
- Adalto Pontes
- Department of Neuroscience, Temple University School of Medicine, Philadelphia, PA 19140, USA ; Universidade do Estado do Pará, Santarém, PA, Brasil
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