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O'Donnell AM. Translational research in Hirschprung's disease at the National Children's Research Centre in Dublin. Pediatr Surg Int 2022; 39:33. [PMID: 36460933 DOI: 10.1007/s00383-022-05323-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/24/2022] [Indexed: 12/04/2022]
Abstract
Hirschsprung's disease (HD) is a congenital condition characterised by aganglionosis in the distal bowel. Over the years, at the National Children's Research Centre (NCRC), HD has been one of the most prominent and successful research areas for Prof. Prem Puri's research team. Research fellows from around the world came to the NCRC to work on both animal and human studies of HD and, cumulatively, made important discoveries in this field, publishing a total of 144 HD articles in peer-reviewed journals. Through their published work, the NCRC has been recognised as the leading international centre for the investigation of HD and its allied disorders. In this review, I will summarise the main findings from this work.
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2
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Morales FL, Fleming MA, Esdaille CJ, Mendoza MV, Kabagambe SK. Intestinal neuronal dysplasia type B of the duodenum in an adolescent patient. JOURNAL OF PEDIATRIC SURGERY CASE REPORTS 2022. [DOI: 10.1016/j.epsc.2022.102490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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3
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Zhang Z, Li B, Jiang Q, Li Q, Pierro A, Li L. Hirschsprung-Associated Enterocolitis: Transformative Research from Bench to Bedside. Eur J Pediatr Surg 2022; 32:383-390. [PMID: 35649434 DOI: 10.1055/s-0042-1745780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Hirschsprung disease (HSCR) is a congenital disease that is characterized by the absence of intrinsic ganglion cells in the submucosal and myenteric plexuses of the distal colon and is the most common cause of congenital intestinal obstruction. Hirschsprung-associated enterocolitis (HAEC) is a life-threatening complication of HSCR, which can occur either before or after surgical resection of the aganglionic bowel. Even though HAEC is a leading cause of death in HSCR patients, its etiology and pathophysiology remain poorly understood. Various factors have been associated with HAEC, including the mucus barrier, microbiota, immune function, obstruction of the colon, and genetic variations. In this review, we examine our current mouse model of HAEC and how it informs our understanding of the disease. We also describe current emerging research that highlights the potential future of HAEC treatment.
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Affiliation(s)
- Zhen Zhang
- Department of General Surgery, Capital Institute of Pediatrics, Beijing, Beijing, China
| | - Bo Li
- Translational Medicine Program, Division of General and Thoracic Surgery, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Qian Jiang
- Department of Medical Genetics, Capital Institute of Pediatrics, Beijing, China
| | - Qi Li
- Department of General Surgery, Capital Institute of Pediatrics, Beijing, Beijing, China
| | - Agostino Pierro
- Department of Paediatric Surgery, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Long Li
- Department of General Surgery, Capital Institute of Pediatrics, Beijing, Beijing, China
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4
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Edwinson AL, Grover M. Measurement of novel intestinal secretory and barrier pathways and effects of proteases. Neurogastroenterol Motil 2019; 31:e13547. [PMID: 30843358 PMCID: PMC6407641 DOI: 10.1111/nmo.13547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 12/02/2018] [Accepted: 12/17/2018] [Indexed: 02/08/2023]
Abstract
The epithelial lining of the gastrointestinal (GI) tract in conjunction with the enteric nervous system (ENS) plays an important role in mediating solute absorption and secretion. A dysregulated ionic movement across the epithelium can result in GI diseases that manifest as either watery diarrhea or constipation. Hirschsprung disease is an example of an ENS disorder characterized by absence of enteric ganglia in distal gut resulting in obstructive phenotype. Receptor rearranged during transfection (RET) gene variants are the most commonly recognized genetic associations with Hirschsprung disease. In this issue of Neurogastroenterology and Motility, Russell et al demonstrate that RET mediates colonic ion transport through modulation of cholinergic nerves. They go on to show inhibition of RET can attenuate accelerated transit in a rat model. Normalizing secretory and absorptive defects has been an attractive therapeutic strategy. In addition to the intrinsic regulation of secretory processes, luminal mediators like bile acids, short-chain fatty acids, and proteases can affect both secretion and barrier function of the intestinal epithelium. Elevated levels of proteases have been identified in a wide range of GI diseases including irritable bowel syndrome. Proteases are known to cause visceral hypersensitivity and barrier disruption in vitro and in animal models. The goals of this review are to describe fundamental concepts related to intestinal epithelial secretion, the utility of Ussing chambers to measure ionic mechanisms and to discuss examples of novel signaling pathways; namely the RET signaling cascade in secretomotor neurons and effects of luminal proteases on barrier and ionic secretion.
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Affiliation(s)
- Adam L. Edwinson
- Division of Gastroenterology & Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Madhusudan Grover
- Division of Gastroenterology & Hepatology, Mayo Clinic, Rochester, MN, USA,Correspondence: Madhusudan Grover, MD, Assistant Professor of Medicine and Physiology, Enteric NeuroScience Program, Division of Gastroenterology and Hepatology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA, Tel: 507-284-2478, Fax: 507-266-0350,
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5
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Ji X, Bossé Y, Landi MT, Gui J, Xiao X, Qian D, Joubert P, Lamontagne M, Li Y, Gorlov I, de Biasi M, Han Y, Gorlova O, Hung RJ, Wu X, McKay J, Zong X, Carreras-Torres R, Christiani DC, Caporaso N, Johansson M, Liu G, Bojesen SE, Le Marchand L, Albanes D, Bickeböller H, Aldrich MC, Bush WS, Tardon A, Rennert G, Chen C, Teare MD, Field JK, Kiemeney LA, Lazarus P, Haugen A, Lam S, Schabath MB, Andrew AS, Shen H, Hong YC, Yuan JM, Bertazzi PA, Pesatori AC, Ye Y, Diao N, Su L, Zhang R, Brhane Y, Leighl N, Johansen JS, Mellemgaard A, Saliba W, Haiman C, Wilkens L, Fernandez-Somoano A, Fernandez-Tardon G, van der Heijden EHFM, Kim JH, Dai J, Hu Z, Davies MPA, Marcus MW, Brunnström H, Manjer J, Melander O, Muller DC, Overvad K, Trichopoulou A, Tumino R, Doherty J, Goodman GE, Cox A, Taylor F, Woll P, Brüske I, Manz J, Muley T, Risch A, Rosenberger A, Grankvist K, Johansson M, Shepherd F, Tsao MS, Arnold SM, Haura EB, Bolca C, Holcatova I, Janout V, Kontic M, Lissowska J, Mukeria A, Ognjanovic S, Orlowski TM, Scelo G, Swiatkowska B, Zaridze D, Bakke P, Skaug V, Zienolddiny S, Duell EJ, Butler LM, Koh WP, Gao YT, Houlston R, McLaughlin J, Stevens V, Nickle DC, Obeidat M, Timens W, Zhu B, Song L, Artigas MS, Tobin MD, Wain LV, Gu F, Byun J, Kamal A, Zhu D, Tyndale RF, Wei WQ, Chanock S, Brennan P, Amos CI. Identification of susceptibility pathways for the role of chromosome 15q25.1 in modifying lung cancer risk. Nat Commun 2018; 9:3221. [PMID: 30104567 PMCID: PMC6089967 DOI: 10.1038/s41467-018-05074-y] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 05/01/2018] [Indexed: 12/20/2022] Open
Abstract
Genome-wide association studies (GWAS) identified the chromosome 15q25.1 locus as a leading susceptibility region for lung cancer. However, the pathogenic pathways, through which susceptibility SNPs within chromosome 15q25.1 affects lung cancer risk, have not been explored. We analyzed three cohorts with GWAS data consisting 42,901 individuals and lung expression quantitative trait loci (eQTL) data on 409 individuals to identify and validate the underlying pathways and to investigate the combined effect of genes from the identified susceptibility pathways. The KEGG neuroactive ligand receptor interaction pathway, two Reactome pathways, and 22 Gene Ontology terms were identified and replicated to be significantly associated with lung cancer risk, with P values less than 0.05 and FDR less than 0.1. Functional annotation of eQTL analysis results showed that the neuroactive ligand receptor interaction pathway and gated channel activity were involved in lung cancer risk. These pathways provide important insights for the etiology of lung cancer.
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Grants
- P30 CA023108 NCI NIH HHS
- P30 CA076292 NCI NIH HHS
- U01 CA063464 NCI NIH HHS
- P50 CA070907 NCI NIH HHS
- R01 CA111703 NCI NIH HHS
- UM1 CA182876 NCI NIH HHS
- UL1 TR000117 NCATS NIH HHS
- P20 CA090578 NCI NIH HHS
- U19 CA148127 NCI NIH HHS
- P20 GM103534 NIGMS NIH HHS
- UL1 TR000445 NCATS NIH HHS
- R01 LM012012 NLM NIH HHS
- R01 CA092824 NCI NIH HHS
- R35 CA197449 NCI NIH HHS
- UM1 CA164973 NCI NIH HHS
- U01 CA167462 NCI NIH HHS
- U19 CA203654 NCI NIH HHS
- R01 CA144034 NCI NIH HHS
- P20 RR018787 NCRR NIH HHS
- S10 RR025141 NCRR NIH HHS
- R01 CA074386 NCI NIH HHS
- R01 CA176568 NCI NIH HHS
- K07 CA172294 NCI NIH HHS
- P50 CA119997 NCI NIH HHS
- G0902313 Medical Research Council
- R01 CA063464 NCI NIH HHS
- P01 CA033619 NCI NIH HHS
- R01 HL133786 NHLBI NIH HHS
- P30 CA177558 NCI NIH HHS
- P50 CA090578 NCI NIH HHS
- U01 HG004798 NHGRI NIH HHS
- R01 CA151989 NCI NIH HHS
- 001 World Health Organization
- 202849/Z/16/Z Wellcome Trust
- UM1 CA167462 NCI NIH HHS
- U01 CA164973 NCI NIH HHS
- This work was supported by National Institutes of Health (NIH) for the research of lung cancer (grant P30CA023108, P20GM103534 and R01LM012012); Trandisciplinary Research in Cancer of the Lung (TRICL) (grant U19CA148127); UICC American Cancer Society Beginning Investigators Fellowship funded by the Union for International Cancer Control (UICC) (to X.Ji). CAPUA study. This work was supported by FIS-FEDER/Spain grant numbers FIS-01/310, FIS-PI03-0365, and FIS-07-BI060604, FICYT/Asturias grant numbers FICYT PB02-67 and FICYT IB09-133, and the University Institute of Oncology (IUOPA), of the University of Oviedo and the Ciber de Epidemiologia y Salud Pública. CIBERESP, SPAIN. The work performed in the CARET study was supported by the The National Institute of Health / National Cancer Institute: UM1 CA167462 (PI: Goodman), National Institute of Health UO1-CA6367307 (PIs Omen, Goodman); National Institute of Health R01 CA111703 (PI Chen), National Institute of Health 5R01 CA151989-01A1(PI Doherty). The Liverpool Lung project is supported by the Roy Castle Lung Cancer Foundation. The Harvard Lung Cancer Study was supported by the NIH (National Cancer Institute) grants CA092824, CA090578, CA074386 The Multiethnic Cohort Study was partially supported by NIH Grants CA164973, CA033619, CA63464 and CA148127 The work performed in MSH-PMH study was supported by The Canadian Cancer Society Research Institute (020214), Ontario Institute of Cancer and Cancer Care Ontario Chair Award to R.J.H. and G.L. and the Alan Brown Chair and Lusi Wong Programs at the Princess Margaret Hospital Foundation. NJLCS was funded by the State Key Program of National Natural Science of China (81230067), the National Key Basic Research Program Grant (2011CB503805), the Major Program of the National Natural Science Foundation of China (81390543). Norway study was supported by Norwegian Cancer Society, Norwegian Research Council The Shanghai Cohort Study (SCS) was supported by National Institutes of Health R01 CA144034 (PI: Yuan) and UM1 CA182876 (PI: Yuan). The Singapore Chinese Health Study (SCHS) was supported by National Institutes of Health R01 CA144034 (PI: Yuan) and UM1 CA182876 (PI: Yuan). The work in TLC study has been supported in part the James & Esther King Biomedical Research Program (09KN-15), National Institutes of Health Specialized Programs of Research Excellence (SPORE) Grant (P50 CA119997), and by a Cancer Center Support Grant (CCSG) at the H. Lee Moffitt Cancer Center and Research Institute, an NCI designated Comprehensive Cancer Center (grant number P30-CA76292) The Vanderbilt Lung Cancer Study – BioVU dataset used for the analyses described was obtained from Vanderbilt University Medical Center’s BioVU, which is supported by institutional funding, the 1S10RR025141-01 instrumentation award, and by the Vanderbilt CTSA grant UL1TR000445 from NCATS/NIH. Dr. Aldrich was supported by NIH/National Cancer Institute K07CA172294 (PI: Aldrich) and Dr. Bush was supported by NHGRI/NIH U01HG004798 (PI: Crawford). The Copenhagen General Population Study (CGPS) was supported by the Chief Physician Johan Boserup and Lise Boserup Fund, the Danish Medical Research Council and Herlev Hospital. The NELCS study: Grant Number P20RR018787 from the National Center for Research Resources (NCRR), a component of the National Institutes of Health (NIH). The MDACC study was supported in part by grants from the NIH (P50 CA070907, R01 CA176568) (to X. Wu), Cancer Prevention & Research Institute of Texas (RP130502) (to X. Wu), and The University of Texas MD Anderson Cancer Center institutional support for the Center for Translational and Public Health Genomics. The study in Lodz center was partially funded by Nofer Institute of Occupational Medicine, under task NIOM 10.13: Predictors of mortality from non-small cell lung cancer - field study. Kentucky Lung Cancer Research Initiative was supported by the Department of Defense [Congressionally Directed Medical Research Program, U.S. Army Medical Research and Materiel Command Program] under award number: 10153006 (W81XWH-11-1-0781). Views and opinions of, and endorsements by the author(s) do not reflect those of the US Army or the Department of Defense. This research was also supported by unrestricted infrastructure funds from the UK Center for Clinical and Translational Science, NIH grant UL1TR000117 and Markey Cancer Center NCI Cancer Center Support Grant (P30 CA177558) Shared Resource Facilities: Cancer Research Informatics, Biospecimen and Tissue Procurement, and Biostatistics and Bioinformatics. The Resource for the Study of Lung Cancer Epidemiology in North Trent (ReSoLuCENT) study was funded by the Sheffield Hospitals Charity, Sheffield Experimental Cancer Medicine Centre and Weston Park Hospital Cancer Charity. FT was supported by a clinical PhD fellowship funded by the Yorkshire Cancer Research/Cancer Research UK Sheffield Cancer Centre. The authors would like to thank the staff at the Respiratory Health Network Tissue Bank of the FRQS for their valuable assistance with the lung eQTL dataset at Laval University. The lung eQTL study at Laval University was supported by the Fondation de l’Institut universitaire de cardiologie et de pneumologie de Québec, the Respiratory Health Network of the FRQS, the Canadian Institutes of Health Research (MOP - 123369). Y.B. holds a Canada Research Chair in Genomics of Heart and Lung Diseases. The research undertaken by M.D.T., L.V.W. and M.S.A. was partly funded by the National Institute for Health Research (NIHR). The views expressed are those of the author(s) and not necessarily those of the NHS, the NIHR or the Department of Health. M.D.T. holds a Medical Research Council Senior Clinical Fellowship (G0902313).
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Affiliation(s)
- Xuemei Ji
- Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, 03750, NH, USA
| | - Yohan Bossé
- Department of Molecular Medicine, Laval University, Québec, G1V 4G5, Canada
- Institut universitaire de cardiologie et de pneumologie de Québec, Québec, G1V 4G5, Canada
| | - Maria Teresa Landi
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, 20892, MD, USA
| | - Jiang Gui
- Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, 03750, NH, USA
| | - Xiangjun Xiao
- Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, 03750, NH, USA
| | - David Qian
- Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, 03750, NH, USA
| | - Philippe Joubert
- Institut universitaire de cardiologie et de pneumologie de Québec, Québec, G1V 4G5, Canada
| | - Maxime Lamontagne
- Institut universitaire de cardiologie et de pneumologie de Québec, Québec, G1V 4G5, Canada
| | - Yafang Li
- Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, 03750, NH, USA
| | - Ivan Gorlov
- Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, 03750, NH, USA
| | - Mariella de Biasi
- Annenberg School of Communication, University of Pennsylvania, Philadelphia, 19104, PA, USA
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, 19104, PA, USA
| | - Younghun Han
- Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, 03750, NH, USA
| | - Olga Gorlova
- Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, 03750, NH, USA
| | - Rayjean J Hung
- Lunenfeld-Tanenbaum Research Institute, Sinai Health System and University of Toronto, Toronto, M5T 3L9, Canada
| | - Xifeng Wu
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, 77030, TX, USA
| | - James McKay
- International Agency for Research on Cancer, World Health Organization, Lyon, 69372 CEDEX 08, France
| | - Xuchen Zong
- Lunenfeld-Tanenbaum Research Institute, Sinai Health System and University of Toronto, Toronto, M5T 3L9, Canada
| | - Robert Carreras-Torres
- International Agency for Research on Cancer, World Health Organization, Lyon, 69372 CEDEX 08, France
| | - David C Christiani
- Department of Environmental Health, Harvard School of Public Health, Boston, 02115, MA, USA
- Department of Medicine, Massachusetts General Hospital, Boston, 02115, MA, USA
| | - Neil Caporaso
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, 20892, MD, USA
| | - Mattias Johansson
- International Agency for Research on Cancer, World Health Organization, Lyon, 69372 CEDEX 08, France
| | - Geoffrey Liu
- Lunenfeld-Tanenbaum Research Institute, Sinai Health System and University of Toronto, Toronto, M5T 3L9, Canada
| | - Stig E Bojesen
- Department of Clinical Biochemistry, Herlev and Gentofte Hospital, Copenhagen University Hospital, Copenhagen, Herlev 2730, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, 2200 København N, Denmark
- Copenhagen General Population Study, Herlev and Gentofte Hospital, Ringvej 75, Copenhagen, Herlev 2730, Denmark
| | - Loic Le Marchand
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, 96813, HI, USA
| | - Demetrios Albanes
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, 20892, MD, USA
| | - Heike Bickeböller
- Department of Genetic Epidemiology, University Medical Center, Georg-August-University Göttingen, Göttingen, 37073, Germany
| | - Melinda C Aldrich
- Department of Thoracic Surgery, Division of Epidemiology, Vanderbilt University Medical Center, Nashville, 37203, TN, USA
| | - William S Bush
- Department of Thoracic Surgery, Division of Epidemiology, Vanderbilt University Medical Center, Nashville, 37203, TN, USA
- Department of Epidemiology and Biostatistics, School of Medicine, Case Western Reserve University, Cleveland, 44106, OH, USA
| | - Adonina Tardon
- Faculty of Medicine, University of Oviedo, Oviedo, 33006, Spain
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública, Campus del Cristo s/n, Oviedo, 33006, Spain
| | - Gad Rennert
- Clalit National Cancer Control Center, Carmel Medical Center, Haifa, 34361, Israel
- Faculty of Medicine, Technion, Haifa, 34361, Israel
| | - Chu Chen
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, 98109, WA, USA
| | - M Dawn Teare
- School of Health and Related Research, University of Sheffield, Sheffield, S1 4DA, UK
| | - John K Field
- Roy Castle Lung Cancer Research Programme, Institute of Translational Medicine, University of Liverpool, Liverpool, L69 3BX, UK
| | - Lambertus A Kiemeney
- Radboud University Medical Center, Radboud Institute for Health Sciences, Nijmegen, 6525 EZ, The Netherlands
| | - Philip Lazarus
- Department of Pharmaceutical Sciences, College of Pharmacy, Washington State University, Spokane, 99210-1495, WA, USA
| | - Aage Haugen
- National Institute of Occupational Health, 0033, Gydas vei 8, 0033, Oslo, Norway
| | - Stephen Lam
- British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver, V5Z1L3, Canada
| | - Matthew B Schabath
- Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, 33612, FL, USA
| | - Angeline S Andrew
- Department of Epidemiology, Geisel School of Medicine, 1 Medical Center Drive, Hanover, 03755, NH, USA
| | - Hongbing Shen
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, 101 Longmian Ave, Nanjing, 211166, PR China
| | - Yun-Chul Hong
- Department of Preventive Medicine, Seoul National University College of Medicine, 1 Gwanak-ro, Gwanak-gu, Seoul, 151 742, Republic of Korea
| | - Jian-Min Yuan
- University of Pittsburgh Cancer Institute, Pittsburgh, 15232, PA, USA
| | - Pier A Bertazzi
- Department of Preventive Medicine, IRCCS Foundation Ca'Granda Ospedale Maggiore Policlinico, Milan, 20133, Italy
- Department of Clinical Sciences and Community Health, University of Milan, Milan, 20133, Italy
| | - Angela C Pesatori
- Department of Preventive Medicine, IRCCS Foundation Ca'Granda Ospedale Maggiore Policlinico, Milan, 20133, Italy
- Department of Clinical Sciences and Community Health, University of Milan, Milan, 20133, Italy
| | - Yuanqing Ye
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, 77030, TX, USA
| | - Nancy Diao
- Department of Environmental Health, Harvard School of Public Health, Boston, 02115, MA, USA
| | - Li Su
- Department of Environmental Health, Harvard School of Public Health, Boston, 02115, MA, USA
| | - Ruyang Zhang
- Department of Environmental Health, Harvard School of Public Health, Boston, 02115, MA, USA
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, 101 Longmian Ave, Nanjing, 211166, PR China
| | - Yonathan Brhane
- Lunenfeld-Tanenbaum Research Institute, Sinai Health System and University of Toronto, Toronto, M5T 3L9, Canada
| | - Natasha Leighl
- University Health Network-The Princess Margaret Cancer Centre, 600 University Avenue, Toronto, M5G 2C4, Canada
| | - Jakob S Johansen
- Department of Oncology, Herlev and Gentofte Hospital, Copenhagen University Hospital, Copenhagen, 2730, Denmark
| | - Anders Mellemgaard
- Department of Oncology, Herlev and Gentofte Hospital, Copenhagen University Hospital, Copenhagen, 2730, Denmark
| | - Walid Saliba
- Clalit National Cancer Control Center, Carmel Medical Center, Haifa, 34361, Israel
- Faculty of Medicine, Technion, Haifa, 34361, Israel
| | - Christopher Haiman
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California Norris Comprehensive Cancer Center, Los Angeles, 90033, CA, USA
| | - Lynne Wilkens
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, 96813, HI, USA
| | - Ana Fernandez-Somoano
- Faculty of Medicine, University of Oviedo, Oviedo, 33006, Spain
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública, Campus del Cristo s/n, Oviedo, 33006, Spain
| | - Guillermo Fernandez-Tardon
- Faculty of Medicine, University of Oviedo, Oviedo, 33006, Spain
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública, Campus del Cristo s/n, Oviedo, 33006, Spain
| | - Erik H F M van der Heijden
- Radboud University Medical Center, Radboud Institute for Health Sciences, Nijmegen, 6525 EZ, The Netherlands
| | - Jin Hee Kim
- Department of Integrative Bioscience & Biotechnology, Sejong University, Gwangjin-gu, Seoul, 05029, Republic of Korea
| | - Juncheng Dai
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, 101 Longmian Ave, Nanjing, 211166, PR China
| | - Zhibin Hu
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, 101 Longmian Ave, Nanjing, 211166, PR China
| | - Michael P A Davies
- Roy Castle Lung Cancer Research Programme, Institute of Translational Medicine, University of Liverpool, Liverpool, L69 3BX, UK
| | - Michael W Marcus
- Roy Castle Lung Cancer Research Programme, Institute of Translational Medicine, University of Liverpool, Liverpool, L69 3BX, UK
| | - Hans Brunnström
- Department of Pathology, Lund University, Lund, 222 41, Sweden
| | - Jonas Manjer
- Faculty of Medicine, Lund University, Lund, 22100, Sweden
| | - Olle Melander
- Faculty of Medicine, Lund University, Lund, 22100, Sweden
| | - David C Muller
- School of Public Health, St Mary's Campus, Imperial College London, London, W2 1PG, UK
| | - Kim Overvad
- Faculty of Medicine, Lund University, Lund, 22100, Sweden
| | | | - Rosario Tumino
- Cancer Registry and Histopathology Department, "Civic-M.P. Arezzo" Hospital, ASP, Ragusa, 97100, Italy
| | - Jennifer Doherty
- Department of Epidemiology, Geisel School of Medicine, 1 Medical Center Drive, Hanover, 03755, NH, USA
- Fred Hutchinson Cancer Research Center, Seattle, 98109-1024, WA, USA
| | - Gary E Goodman
- Fred Hutchinson Cancer Research Center, Seattle, 98109-1024, WA, USA
- Swedish Medical Group, Arnold Pavilion, Suite 200, Seattle, 98104, WA, USA
| | - Angela Cox
- Department of Oncology and Metabolism, University of Sheffield, Sheffield, S10 2RX, UK
| | - Fiona Taylor
- Department of Oncology and Metabolism, University of Sheffield, Sheffield, S10 2RX, UK
| | - Penella Woll
- Department of Oncology and Metabolism, University of Sheffield, Sheffield, S10 2RX, UK
| | - Irene Brüske
- Research Unit of Molecular Epidemiology, Institute of Epidemiology II, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, D-85764, Germany
| | - Judith Manz
- Research Unit of Molecular Epidemiology, Institute of Epidemiology II, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, D-85764, Germany
| | - Thomas Muley
- Thoraxklinik at University Hospital Heidelberg, Heidelberg, 69126, Germany
- Translational Lung Research Center Heidelberg (TLRC-H), Heidelberg, 69120, Germany
| | - Angela Risch
- Cancer Cluster Salzburg, University of Salzburg, Salzburg, 5020, Austria
| | - Albert Rosenberger
- Department of Genetic Epidemiology, University Medical Center, Georg-August-University Göttingen, Göttingen, 37073, Germany
| | - Kjell Grankvist
- Department of Medical Biosciences, Umeå University, Umeå, 901 85, Sweden
| | - Mikael Johansson
- Department of Radiation Sciences, Umeå University, Umeå, 901 85, Sweden
| | | | | | - Susanne M Arnold
- Markey Cancer Center, University of Kentucky, First Floor, 800 Rose Street, Lexington, 40508, KY, USA
| | - Eric B Haura
- Department of Thoracic Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, 33612, KY, USA
| | - Ciprian Bolca
- Institute of Pneumology "Marius Nasta", Bucharest, RO-050159, Romania
| | - Ivana Holcatova
- 1st Faculty of Medicine, Charles University, Kateřinská 32, Prague, 121 08 Praha 2, Czech Republic
| | - Vladimir Janout
- 1st Faculty of Medicine, Charles University, Kateřinská 32, Prague, 121 08 Praha 2, Czech Republic
| | - Milica Kontic
- Clinical Center of Serbia, Clinic for Pulmonology, School of Medicine, University of Belgrade, Belgrade, 11000, Serbia
| | - Jolanta Lissowska
- Department of Cancer Epidemiology and Prevention, M. Sklodowska-Curie Institute-Oncology Center, Warsaw, 02-781, Poland
| | - Anush Mukeria
- Department of Epidemiology and Prevention, Russian N.N. Blokhin Cancer Research Centre, Moscow, 115478, Russian Federation
| | - Simona Ognjanovic
- International Organization for Cancer Prevention and Research, Belgrade, 11070, Serbia
| | - Tadeusz M Orlowski
- Department of Surgery, National Tuberculosis and Lung Diseases Research Institute, Warsaw, PL-01-138, Poland
| | - Ghislaine Scelo
- International Agency for Research on Cancer, World Health Organization, Lyon, 69372 CEDEX 08, France
| | - Beata Swiatkowska
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine, Lodz, 91-348, Poland
| | - David Zaridze
- Department of Epidemiology and Prevention, Russian N.N. Blokhin Cancer Research Centre, Moscow, 115478, Russian Federation
| | - Per Bakke
- Department of Clinical Science, University of Bergen, Bergen, 5021, Norway
| | - Vidar Skaug
- National Institute of Occupational Health, 0033, Gydas vei 8, 0033, Oslo, Norway
| | - Shanbeh Zienolddiny
- National Institute of Occupational Health, 0033, Gydas vei 8, 0033, Oslo, Norway
| | - Eric J Duell
- Unit of Nutrition and Cancer, Catalan Institute of Oncology (ICO-IDIBELL), Barcelona, 08908, Spain
| | - Lesley M Butler
- University of Pittsburgh Cancer Institute, Pittsburgh, 15232, PA, USA
| | - Woon-Puay Koh
- Duke-NUS Medical School, Singapore, 119077, Singapore
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore, 117549, Singapore
| | - Yu-Tang Gao
- Department of Epidemiology, Shanghai Cancer Institute, Shanghai, 2200, China
| | | | | | | | - David C Nickle
- Department of Genetics and Pharmacogenomics, Merck Research Laboratories, Boston, 02115-5727, MA, USA
| | - Ma'en Obeidat
- Centre for Heart Lung Innovation, St Paul's Hospital, The University of British Columbia, Vancouver, V6Z 1Y6, BC, Canada
| | - Wim Timens
- Department of Pathology and Medical Biology, GRIAC, University of Groningen, University Medical Center Groningen, Groningen, NL - 9713 GZ, The Netherlands
| | - Bin Zhu
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, 20892, MD, USA
| | - Lei Song
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, 20892, MD, USA
| | - María Soler Artigas
- Genetic Epidemiology Group, Department of Health Sciences, University of Leicester, Leicester, LE1 7RH, UK
- Leicester Respiratory Biomedical Research Unit, National Institute for Health Research (NIHR), Glenfield Hospital, Leicester, LE3 9QP, UK
| | - Martin D Tobin
- Genetic Epidemiology Group, Department of Health Sciences, University of Leicester, Leicester, LE1 7RH, UK
- Leicester Respiratory Biomedical Research Unit, National Institute for Health Research (NIHR), Glenfield Hospital, Leicester, LE3 9QP, UK
| | - Louise V Wain
- Genetic Epidemiology Group, Department of Health Sciences, University of Leicester, Leicester, LE1 7RH, UK
- Leicester Respiratory Biomedical Research Unit, National Institute for Health Research (NIHR), Glenfield Hospital, Leicester, LE3 9QP, UK
| | - Fangyi Gu
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, 20892, MD, USA
| | - Jinyoung Byun
- Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, 03750, NH, USA
| | - Ahsan Kamal
- Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, 03750, NH, USA
| | - Dakai Zhu
- Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, 03750, NH, USA
| | - Rachel F Tyndale
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, M5S 1A8, ON, Canada
- Department of Psychiatry, University of Toronto, Toronto, M5T 1R8, ON, Canada
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, M6J 1H4, ON, Canada
| | - Wei-Qi Wei
- Department of Biomedical Informatics, School of Medicine, Vanderbilt University, Nashville, TN, 37235, USA
| | - Stephen Chanock
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, 20892, MD, USA
| | - Paul Brennan
- International Agency for Research on Cancer, World Health Organization, Lyon, 69372 CEDEX 08, France
| | - Christopher I Amos
- Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, 03750, NH, USA.
- The Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, 77030, TX, USA.
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6
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Lin YM, Fu Y, Hegde S, Tang Y, Radhakrishnan R, Shi XZ. Microsomal Prostaglandin E Synthase-1 Plays a Critical Role in Long-term Motility Dysfunction after Bowel Obstruction. Sci Rep 2018; 8:8831. [PMID: 29891860 PMCID: PMC5995953 DOI: 10.1038/s41598-018-27230-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 05/24/2018] [Indexed: 12/20/2022] Open
Abstract
Motility dysfunction is present not only during bowel obstruction (BO), but after obstruction is resolved. Previous studies found that lumen distension associated mechano-transcription of COX-2 and production of PGE2 in gut smooth muscle cells (SMC) account for motility dysfunction during obstruction. We hypothesized that PGE2 may exert autocrine effect in SMC to induce microsomal prostaglandin E synthase-1 (mPGES-1), which contributes to motility dysfunction after obstruction is resolved. Partial colon obstruction was induced in rats with an obstruction band, which was released 7 days later. Rats were further studied in the post-BO state. Circular muscle contractility of the mid colon (previously distended during obstruction) remained suppressed, and colon transit was impaired in the post-BO state. The COX-2, mPGES-1, and PGE2 levels were all increased in the distended bowel during obstruction. However, after obstruction was resolved, COX-2 expression returned to normal, whereas mPGES-1 and PGE2 levels remained increased. Expression of mPGES-1 in colon SMC was inducible by stretch or PGE2. Administration of mPGES-1 inhibitor Cay 10526 either before or after the release of obstruction normalized PGE2 levels and improved motility in the post-BO rats. In conclusion, mPGES-1 plays a critical role in the continuous suppression of motor function in the post-BO state.
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Affiliation(s)
- You-Min Lin
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA
| | - Yu Fu
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA
| | - Shrilakshmi Hegde
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA
| | - Yanbo Tang
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA.,Department of Gastroenterology, The first Affiliated Hospital, Guangxi University of Science and Technology, Liuzhou, Guangxi, China
| | - Ravi Radhakrishnan
- Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA
| | - Xuan-Zheng Shi
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA.
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7
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Hutson JM, Farmer PJ, Peck CJ, Chow CW, Southwell BR. Multiple endocrine neoplasia 2B: Differential increase in enteric nerve subgroups in muscle and mucosa. World J Gastrointest Pathophysiol 2017; 8:142-149. [PMID: 28868184 PMCID: PMC5561435 DOI: 10.4291/wjgp.v8.i3.142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 05/24/2017] [Accepted: 07/17/2017] [Indexed: 02/06/2023] Open
Abstract
Multiple endocrine neoplasia 2B (MEN2B) is a rare syndrome caused by an activating mutation of the RET gene, leading to enteric gangliomatosis. This child presented with constipation at 1-mo old, was diagnosed with MEN2B by rectal biopsy at 4 mo, had thyroidectomy at 9 mo and a colectomy at 4 years. We studied the extent of neuronal and nerve fibre proliferation and which classes of enteric nerves are affected by examining the colon with multiple neuronal antibodies. Resected transverse colon was fixed, frozen, sectioned and processed for fluorescence immunohistochemistry labelling with antibodies against TUJ1, Hu, ChAT, NOS, VIP, SP and CGRP and cKit. Control transverse colon was from the normal margin of Hirschsprung (HSCR) colon (4-year-old) and a child with familial adenomatous polyposis (FAP, 12 year). Myenteric ganglia were increased in size to as wide as the circular muscle. There was a large increase in nerve cells and nerve fibres. ChAT-, NOS-, VIP- and SP-immunoreactive nerve fibres all increased in the myenteric ganglia. NOS-IR nerves preferentially increased in the muscle, while VIP and SP increased in submucosal ganglia and mucosal nerve fibres. The density of ICC was normal. RET overactivation in MEN2B lead to a large increase in intrinsic nerve fibres in the myenteric and submucosal ganglia, with a relative increase in NOS-IR nerve fibres in the circular muscle and VIP and SP in the submucosal ganglia and mucosa. The changes were associated with severe constipation resulting in colectomy at 4 years.
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8
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Roy-Carson S, Natukunda K, Chou HC, Pal N, Farris C, Schneider SQ, Kuhlman JA. Defining the transcriptomic landscape of the developing enteric nervous system and its cellular environment. BMC Genomics 2017; 18:290. [PMID: 28403821 PMCID: PMC5389105 DOI: 10.1186/s12864-017-3653-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 03/22/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Motility and the coordination of moving food through the gastrointestinal tract rely on a complex network of neurons known as the enteric nervous system (ENS). Despite its critical function, many of the molecular mechanisms that direct the development of the ENS and the elaboration of neural network connections remain unknown. The goal of this study was to transcriptionally identify molecular pathways and candidate genes that drive specification, differentiation and the neural circuitry of specific neural progenitors, the phox2b expressing ENS cell lineage, during normal enteric nervous system development. Because ENS development is tightly linked to its environment, the transcriptional landscape of the cellular environment of the intestine was also analyzed. RESULTS Thousands of zebrafish intestines were manually dissected from a transgenic line expressing green fluorescent protein under the phox2b regulatory elements [Tg(phox2b:EGFP) w37 ]. Fluorescence-activated cell sorting was used to separate GFP-positive phox2b expressing ENS progenitor and derivatives from GFP-negative intestinal cells. RNA-seq was performed to obtain accurate, reproducible transcriptional profiles and the unbiased detection of low level transcripts. Analysis revealed genes and pathways that may function in ENS cell determination, genes that may be identifiers of different ENS subtypes, and genes that define the non-neural cellular microenvironment of the ENS. Differential expression analysis between the two cell populations revealed the expected neuronal nature of the phox2b expressing lineage including the enrichment for genes required for neurogenesis and synaptogenesis, and identified many novel genes not previously associated with ENS development. Pathway analysis pointed to a high level of G-protein coupled pathway activation, and identified novel roles for candidate pathways such as the Nogo/Reticulon axon guidance pathway in ENS development. CONCLUSION We report the comprehensive gene expression profiles of a lineage-specific population of enteric progenitors, their derivatives, and their microenvironment during normal enteric nervous system development. Our results confirm previously implicated genes and pathways required for ENS development, and also identify scores of novel candidate genes and pathways. Thus, our dataset suggests various potential mechanisms that drive ENS development facilitating characterization and discovery of novel therapeutic strategies to improve gastrointestinal disorders.
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Affiliation(s)
- Sweta Roy-Carson
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, 50011, USA
| | - Kevin Natukunda
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, 50011, USA
| | - Hsien-Chao Chou
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, 50011, USA.,Present Address: National Cancer Institute, US National Institutes of Health, Bethesda, Maryland, USA
| | - Narinder Pal
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, 50011, USA.,Present address: North Central Regional Plant Introduction Station, 1305 State Ave, Ames, IA, 50014, USA
| | - Caitlin Farris
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, 50011, USA.,Present address: Pioneer Hi-Bred International, Johnson, IA, 50131, USA
| | - Stephan Q Schneider
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, 50011, USA
| | - Julie A Kuhlman
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, 50011, USA. .,642 Science II, Iowa State University, Ames, IA, 50011, USA.
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9
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Moore SW. Advances in understanding functional variations in the Hirschsprung disease spectrum (variant Hirschsprung disease). Pediatr Surg Int 2017; 33:285-298. [PMID: 27988850 DOI: 10.1007/s00383-016-4038-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/05/2016] [Indexed: 12/11/2022]
Abstract
Hirschsprung disease (HSCR) is a fairly well understood congenital, genetically based functional obstruction due to the congenital absence of ganglion cells in the distal bowel. However, although over 90% of Hirschsprung cases conform to the normally accepted histological diagnostic criteria, it has become increasingly clear that in addition to HSCR, there is a group of functional disturbances relating to a number of other congenital neurodysplastic conditions causing some degree of gastrointestinal tract malfunction. Although these represent a variety of possibly separate conditions of the enteric nervous system, this spectrum it would appear to be also influenced by similar developmental processes. The term "variant Hirschsprung" is commonly used to describe these conditions, but ganglion cells are mostly present if abnormal in number and distribution. These conditions are a problem group being amongst the most difficult to diagnose and treat with possible practical and legal consequences. The problem appears to be possibly one of definition which has proven difficult in the relative paucity of normal values, especially when correlated to age and gestation. It is the purpose of this paper to review the current position on these conditions and to explore possible shared common pathogenetic and genetic mechanisms. This article explores those conditions where a similar pathogenetic mechanisms to HSCR can be demonstrated (e.g. hypoganglionosis) as well as other neural features, which appear to represent separate conditions possibly linked to certain syndromes.
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Affiliation(s)
- S W Moore
- Division of Paediatric Surgery, Faculty of Medicine, University of Stellenbosch, P.O. Box 19063, Tygerberg, 7505, South Africa.
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10
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Pan WK, Zhang YF, Yu H, Gao Y, Zheng BJ, Li P, Xie C, Ge X. Identifying key genes associated with Hirschsprung's disease based on bioinformatics analysis of RNA-sequencing data. World J Pediatr 2017; 13:267-273. [PMID: 28120235 PMCID: PMC7091079 DOI: 10.1007/s12519-017-0002-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 08/25/2016] [Indexed: 01/17/2023]
Abstract
BACKGROUND Hirschsprung's disease (HSCR) is a type of megacolon induced by deficiency or dysfunction of ganglion cells in the distal intestine and is associated with developmental disorders of the enteric nervous system. To explore the mechanisms of HSCR, we analyzed the RNA-sequencing data of the expansion and the narrow segments of colon tissues separated from children with HSCR. METHODS RNA-sequencing of the expansion segments and the narrow segments of colon tissues isolated from children with HSCR was performed. After differentially expressed genes (DEGs) were identified using the edgeR package in R, functional and pathway enrichment analyses of DEGs were carried out using DAVID software. To further screen the key genes, protein-protein interaction (PPI) network and module analyses were conducted separately using Cytoscape software. RESULTS A total of 117 DEGs were identified in the expansion segment samples, including 47 up-regulated and 70 down-regulated genes. Functional enrichment analysis suggested that FOS and DUSP1 were implicated in response to endogenous stimulus. In the PPI network analysis, FOS (degree=20), EGR1 (degree=16), ATF3 (degree=9), NOS1 (degree=8), CCL5 (degree=8), DUSP1 (degree=7), CXCL3 (degree=6), VIP (degree=6), FOSB (degree=5), and NOS2 (degree=4) had higher degrees, which could interact with other genes. In addition, two significant modules (module 1 and module 2) were identified from the PPI network. CONCLUSIONS Several genes (including FOS, EGR1, ATF3, NOS1, CCL5, DUSP1, CXCL3, VIP, FOSB, and NOS2) might be involved in the development of HSCR through their effect on the nervous system.
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Affiliation(s)
- Wei-Kang Pan
- Department of Pediatric Surgery, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, 710004 China
| | - Ya-Fei Zhang
- Department of Endoscopy, Shaanxi Nuclear Industry 215 Hospital, Xianyang, 712000 China
| | - Hui Yu
- Department of Pediatric Surgery, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, 710004 China
| | - Ya Gao
- Department of Pediatric Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, China.
| | - Bai-Jun Zheng
- Department of Pediatric Surgery, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, 710004 China
| | - Peng Li
- Department of Pediatric Surgery, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, 710004 China
| | - Chong Xie
- Department of Pediatric Surgery, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, 710004 China
| | - Xin Ge
- Department of Pediatric Surgery, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, 710004 China
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11
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Frydenlund NF, Mahalingam M. Neurotrophin Receptors and Perineural Invasion: Analyses in Select Lineage-Unrelated Cutaneous Malignancies With a Propensity for Perineural Invasion. VITAMINS AND HORMONES 2016; 104:497-531. [PMID: 28215306 DOI: 10.1016/bs.vh.2016.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In this chapter, we parse the literature on neurotrophins that have been implicated in the pathogenesis of perineural invasion (PNI) in select lineage-unrelated malignancies. We also detail evidence linking neurotrophins and their receptors (TrkA, RET, p75NGFR, and NCAM) to the pathogenesis of PNI in desmoplastic melanoma and cutaneous squamous cell carcinoma-both malignancies with an established propensity for PNI. Lastly, the clinical potential of neurotrophins as receptors for targeted therapies is explored.
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Affiliation(s)
- N F Frydenlund
- University of Iowa Carver College of Medicine, Iowa City, IA, United States
| | - M Mahalingam
- VA Consolidated Laboratories, West Roxbury, MA, United States.
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12
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Tomuschat C, O'Donnell AM, Coyle D, Puri P. Increased Act1/IL-17R expression in Hirschsprung's disease. Pediatr Surg Int 2016; 32:1201-1207. [PMID: 27660002 DOI: 10.1007/s00383-016-3980-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/13/2016] [Indexed: 12/19/2022]
Abstract
PURPOSE Hirschsprung's disease -associated enterocolitis (HAEC) is the most common cause of morbidity and mortality in Hirschsprung's disease (HSCR). Altered intestinal epithelial barrier function is implicated in the pathogenesis of HAEC. IL-17 is a proinflammatory cytokine that plays a crucial role in host defense against microbial organisms in the development of inflammatory diseases. Act1 is an essential adaptor molecule required for the IL-17-mediated inflammatory responses via interaction with IL-17 receptor (IL-17R). We designed this study to investigate the hypothesis that Act1/Il-17R expression is upregulated in HSCR. METHODS We investigated Act1 and IL17R expression in ganglionic andaganglionic bowel of HD patients (n = 10) and controls (n = 10). qPCR, Western blotting and confocal immunofluorescence were performed. MAIN RESULTS qPCR and Western blot analysis revealed that Act1 and IL17R are strongly expressed in the aganglionic and ganglionic colon of patients with HSCR. Act1 and IL17R expression was significantly increased in HSCR specimens compared to controls (p < 0.05). Confocal microscopy revealed a markedly increased expression of Act1 and IL17R in the colonic epithelium of patients with HSCR compared to controls. CONCLUSION To our knowledge, we report, for the first time, the expression of Act1 in the human colon. The increased expression of Act1 and Il-17 in the aganglionic and ganglionic bowel in HSCR may result in IL-17-mediated increased inflammatory response leading to the development of HAEC.
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Affiliation(s)
- Christian Tomuschat
- National Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin 12, Ireland
| | - Anne Marie O'Donnell
- National Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin 12, Ireland
| | - David Coyle
- National Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin 12, Ireland
| | - Prem Puri
- National Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin 12, Ireland. .,School of Medicine and Medical Science, Conway Institute of Biomedical Research, University College Dublin, Dublin, Ireland.
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13
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Agrawal RK, Kakkar N, Vasishta RK, Kumari V, Samujh R, Rao KLN. Acetylcholinesterase histochemistry (AChE)--A helpful technique in the diagnosis and in aiding the operative procedures of Hirschsprung disease. Diagn Pathol 2015; 10:208. [PMID: 26631177 PMCID: PMC4668621 DOI: 10.1186/s13000-015-0443-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 11/19/2015] [Indexed: 01/05/2023] Open
Abstract
Background Hirschsprung’s disease (HD) is an anomaly characterized by the absence of myenteric and submucosal ganglion cells (GC) in the distal alimentary tract. Diagnosis of HD is made by the absence of GC and missing out on even a single ganglion cell can be very devastating. Acetylcholinesterase (AChE) histochemistry, done on frozen sections is said to be a very useful ancillary technique in the diagnosis and in aiding the operative procedures of HD. Methods To assess this, 73 samples from 42 suspected/known cases of HD were subjected to frozen section analysis with rapid haematoxylin and eosin, toluidin blue stain along with AChE histochemistry. The remnant sample was paraffin embedded for routine haematoxylin and eosin staining. Results On frozen section analysis, 33 samples showed absence of ganglion cells, AChE histochemistry showed a positive staining pattern in 17 samples and paraffin embedded routine, H&E stained sections showed absence of ganglion cells in 19 samples. Sensitivity and specificity of both tests ie frozen section rapid H&E/AChE histochemistry in the diagnosis of HD, were calculated taking paraffin embedded H&E stained sections as the gold standard. Sensitivity of frozen section rapid H&E in the diagnosis of HD is 57.57 % and specificity is 79.10 %. The p-value is <0.0001, which is significant. The sensitivity of AChE histochemistry in the diagnosis of HD is 90.47 % and specificity is 96.36 %. The p-value is <0.0001, which is significant. Conclusions Acetylcholineesterase (AChE) histochemistry is a very useful ancillary technique in the diagnosis and in aiding the operative procedures of HD. It acts as a double check in the diagnosis of HD.
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Affiliation(s)
- R K Agrawal
- Department of Pathology, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India
| | - Nandita Kakkar
- Department of Histopathology, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India.
| | - R K Vasishta
- Department of Histopathology, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India
| | - Vandana Kumari
- Department of Histopathology, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India
| | - R Samujh
- Department of Pediatric Surgery, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India
| | - K L N Rao
- Department of Pediatric Surgery, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India
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14
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Abstract
PURPOSE Hirschsprung's disease (HSCR) is a developmental disorder of the enteric nervous system, which occurs due to the failure of neural crest cell migration. Rodent animal models of aganglionosis have contributed greatly to our understanding of the genetic basis of HSCR. Several natural or target mutations in specific genes have been reported to produce developmental defects in neural crest migration, differentiation or survival. The aim of this study was to review the currently available knockout models of HSCR to better understand the molecular basis of HSCR. METHODS A review of the literature using the keywords "Hirschsprung's disease", "aganglionosis", "megacolon" and "knockout mice model" was performed. Resulting publications were reviewed for relevant mouse models of human aganglionosis. Reference lists were screened for additional relevant studies. RESULTS 16 gene knockout mouse models were identified as relevant rodent models of human HSCR. Due to the deletion of a specific gene, the phenotypes of these knockout models are diverse and range from small bowel dilatation and muscular hypertrophy to total intestinal aganglionosis. CONCLUSIONS Mouse models of aganglionosis have been instrumental in the discovery of the causative genes of HSCR. Although important advances have been made in understanding the genetic basis of HSCR, animal models of aganglionosis in future should further help to identify the unknown susceptibility genes in HSCR.
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Affiliation(s)
- J Zimmer
- National Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin, Ireland
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15
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Hirayama Y, Iinuma Y, Numano F, Masui D, Iida H, Komatsuzaki N, Nagayama Y, Naito S, Nitta K. Intestinal neuronal dysplasia-like histopathology in infancy. Pediatr Int 2015; 57:491-3. [PMID: 25711721 DOI: 10.1111/ped.12555] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 10/02/2014] [Accepted: 10/15/2014] [Indexed: 12/19/2022]
Abstract
The present patient was delivered at a gestational age of 27 weeks. She had abdominal bloating with symptoms of respiratory distress. We suspected Hirschsprung disease (HD) or small intestinal stricture, but examinations were not definitive. Exploratory laparotomy was performed at 97 days of age. Intraoperative findings showed no evidence of small intestinal stricture or changes in intestinal caliber. A transanal drainage tube was inserted, and decompression therapy and intestinal lavage were started. Rectal mucosal biopsy was performed at 184 days of age, and HE and acetylcholinesterase staining showed intestinal neuronal dysplasia (IND)-like pathological findings. At 15 months, giant ganglia were no longer present on follow-up rectal mucosal biopsy, and the pathological diagnosis was normoganglionosis. It should be recognized that while the enteric nervous system is developing, IND-like pathological findings may be seen as a pathological condition during the maturation process.
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Affiliation(s)
- Yutaka Hirayama
- Department of Pediatric Surgery, Perinatal Medical Center, Niigata City General Hospital, Niigata, Japan
| | - Yasushi Iinuma
- Department of Pediatric Surgery, Perinatal Medical Center, Niigata City General Hospital, Niigata, Japan
| | - Fujito Numano
- Department of Neonatology, Perinatal Medical Center, Niigata City General Hospital, Niigata, Japan
| | - Daisuke Masui
- Department of Pediatric Surgery, Perinatal Medical Center, Niigata City General Hospital, Niigata, Japan
| | - Hisataka Iida
- Department of Pediatric Surgery, Perinatal Medical Center, Niigata City General Hospital, Niigata, Japan
| | - Naoko Komatsuzaki
- Department of Pediatric Surgery, Perinatal Medical Center, Niigata City General Hospital, Niigata, Japan
| | - Yosihisa Nagayama
- Department of Neonatology, Perinatal Medical Center, Niigata City General Hospital, Niigata, Japan
| | - Shinichi Naito
- Department of Pediatric Surgery, Perinatal Medical Center, Niigata City General Hospital, Niigata, Japan
| | - Koju Nitta
- Department of Pediatric Surgery, Perinatal Medical Center, Niigata City General Hospital, Niigata, Japan
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Zhang W, Yan Z, Li B, Jan LY, Jan YN. Identification of motor neurons and a mechanosensitive sensory neuron in the defecation circuitry of Drosophila larvae. eLife 2014; 3:e03293. [PMID: 25358089 PMCID: PMC4244571 DOI: 10.7554/elife.03293] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 10/29/2014] [Indexed: 01/19/2023] Open
Abstract
Defecation allows the body to eliminate waste, an essential step in food processing for animal survival. In contrast to the extensive studies of feeding, its obligate counterpart, defecation, has received much less attention until recently. In this study, we report our characterizations of the defecation behavior of Drosophila larvae and its neural basis. Drosophila larvae display defecation cycles of stereotypic frequency, involving sequential contraction of hindgut and anal sphincter. The defecation behavior requires two groups of motor neurons that innervate hindgut and anal sphincter, respectively, and can excite gut muscles directly. These two groups of motor neurons fire sequentially with the same periodicity as the defecation behavior, as revealed by in vivo Ca(2+) imaging. Moreover, we identified a single mechanosensitive sensory neuron that innervates the anal slit and senses the opening of the intestine terminus. This anus sensory neuron relies on the TRP channel NOMPC but not on INACTIVE, NANCHUNG, or PIEZO for mechanotransduction.
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Affiliation(s)
- Wei Zhang
- Department of Physiology, Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, United States
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, United States
| | - Zhiqiang Yan
- Department of Physiology, Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, United States
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, United States
- State Key Laboratory of Genetic Engineering, Fudan University, Shanghai, China
- Collaborative Innovation Center for Genetics and Development, Fudan University, Shanghai, China
| | - Bingxue Li
- State Key Laboratory of Genetic Engineering, Fudan University, Shanghai, China
- Collaborative Innovation Center for Genetics and Development, Fudan University, Shanghai, China
| | - Lily Yeh Jan
- Department of Physiology, Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, United States
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, United States
| | - Yuh Nung Jan
- Department of Physiology, Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, United States
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, United States
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Best KE, Addor MC, Arriola L, Balku E, Barisic I, Bianchi F, Calzolari E, Curran R, Doray B, Draper E, Garne E, Gatt M, Haeusler M, Bergman J, Khoshnood B, Klungsoyr K, Martos C, Materna-Kiryluk A, Matias Dias C, McDonnell B, Mullaney C, Nelen V, O'Mahony M, Queisser-Luft A, Randrianaivo H, Rissmann A, Rounding C, Sipek A, Thompson R, Tucker D, Wellesley D, Zymak-Zakutnia N, Rankin J. Hirschsprung's disease prevalence in Europe: a register based study. ACTA ACUST UNITED AC 2014; 100:695-702. [PMID: 25066220 DOI: 10.1002/bdra.23269] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/27/2014] [Indexed: 12/31/2022]
Abstract
BACKGROUND Hirschsprung's disease is a congenital gut motility disorder, characterised by the absence of the enteric ganglion cells along the distal gut. The aim of this study was to describe the epidemiology of Hirschsprung's disease, including additional congenital anomalies, total prevalence, trends, and association with maternal age. METHODS Cases of Hirschsprung's disease delivered during 1980 to 2009 notified to 31 European Surveillance of Congenital Anomaly registers formed the population-based case-series. Prevalence rates and 95% confidence intervals were calculated as the number of cases per 10,000 births. Multilevel Poisson regression was performed to investigate trends in prevalence, geographical variation and the association with maternal age. RESULTS There were 1,322 cases of Hirschsprung's disease among 12,146,210 births. The total prevalence was 1.09 (95% confidence interval, 1.03-1.15) per 10,000 births and there was a small but significant increase in prevalence over time (relative risk = 1.01; 95% credible interval, 1.00-1.02; p = 0.004). There was evidence of geographical heterogeneity in prevalence (p < 0.001). Excluding 146 (11.0%) cases with chromosomal anomalies or genetic syndromes, there were 1,176 cases (prevalence = 0.97; 95% confidence interval, 0.91-1.03 per 10,000 births), of which 137 (11.6%) had major structural anomalies. There was no evidence of a significant increased risk of Hirschsprung's disease in cases born to women aged ≥35 years compared with those aged 25 to 29 (relative risk = 1.09; 95% credible interval, 0.91-1.31; p = 0.355). CONCLUSION This large population-based study found evidence of a small increasing trend in Hirschsprung's disease and differences in prevalence by geographic location. There was also no evidence of an association with maternal age.
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Affiliation(s)
- Kate E Best
- Institute of Health & Society, Newcastle University, Newcastle upon Tyne, England, United Kingdom
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18
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Moore SW, Sidler D, Schubert PAW. Segmental aganglionosis (zonal aganglionosis or "skip" lesions) in Hirschsprungs disease: a report of 2 unusual cases. Pediatr Surg Int 2013; 29:495-500. [PMID: 23456285 DOI: 10.1007/s00383-013-3286-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/14/2013] [Indexed: 10/27/2022]
Abstract
INTRODUCTION There is accumulating evidence that "skip" lesions or zonal aganglionosis do occur in HSCR disease, albeit rarely. They are of interest because it may cause confusion in interpreting surgical margins as well as understanding the pathophysiology of HSCR disease. Normally described as "a skip area" of normally ganglionated bowel, surrounded proximally and distally by aganglionosis with variations may occur. CASE REPORTS We report two cases of infants with unusual types of "skip lesions", identified within the last 5 years. RESULTS One patient had an area of zonal aganglionosis in the transverse colon and recto-sigmoid, bordered by areas of normally enervated bowel in the right and descending colon. In the second patient, the terminal ileum, transverse, descending and sigmoid colons and rectum were histologically aganglionic, but focal patches of ganglion cells were identified in 21 cm of the right ascending colon and the appendix, suggesting some ENS plasticity and possible incomplete apoptosis. CONCLUSION These cases illustrate the point that the presence of ganglion cells at the resection line is not sufficient to guarantee postoperative function and "skip" lesions may uncommonly confuse the picture. In addition, they raise questions as to its pathophysiology and favor an alternate hypothesis of local changes promoting neuroblast apoptosis as the possible cause.
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Affiliation(s)
- S W Moore
- Division of Pediatric Surgery, Department of Surgical Sciences, Faculty of Health Sciences, University of Stellenbosch, PO Box 19063, Tygerberg 7505, South Africa.
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19
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20
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Best KE, Glinianaia SV, Bythell M, Rankin J. Hirschsprung's disease in the North of England: prevalence, associated anomalies, and survival. ACTA ACUST UNITED AC 2012; 94:477-80. [PMID: 22511583 DOI: 10.1002/bdra.23016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Revised: 03/08/2012] [Accepted: 03/11/2012] [Indexed: 11/06/2022]
Abstract
INTRODUCTION Hirschsprung's disease is the commonest congenital gut motility disorder, characterized by the absence of the enteric ganglion cells along the distal gut, which causes intestinal obstruction. Few publications report its epidemiology and temporal trends. METHODS Cases of Hirschsprung's disease delivered during 1990 to 2008 in the North of England reported to the Northern Congenital Abnormality Survey (NorCAS) formed this population-based case series. RESULTS Of 612,916 live births, 105 cases were reported to NorCAS. After excluding one diabetic and four multiple pregnancies, the live birth prevalence was 1.63 (95% confidence interval [CI], 1.33-1.98) per 10,000 live births. There was a significant temporal increase in the prevalence of Hirschsprung's disease (p = 0.020), from 1.26 (95% CI, 0.80-1.89) in 1990 to 1994 to 2.29 (95% CI, 1.53-3.29) in 2005 to 2008. The ratio of male to female cases was 2:1. Ten (10.0%) cases occurred with Down syndrome, one with Smith-Lemli-Opitz Syndrome, and six (6.0%) with associated structural anomalies. The remaining 83 (83.0%) cases were isolated. All cases were live born, but nine (9.0%) died in the first year of life. Hirschsprung's disease was not prenatally suspected in any case. Half the cases were diagnosed within 5 days postpartum, but time of diagnosis ranged from birth to 5 years of age. CONCLUSION This study confirmed a male predominance and an association with Down syndrome, but also found a temporal increase in Hirschsprung's disease prevalence. No cases were suspected prenatally, but half were diagnosed within 5 days of life.
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Affiliation(s)
- Kate E Best
- Institute of Health & Society, Newcastle University, Newcastle upon Tyne, United Kingdom
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21
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Li Z, Xu ZL, Liang J, Wu JC, Hu CW, Xie H, Ma WC, Jiang HC, Yang BF, Dong DL. Tetraethylammonium enhances the rectal and colonic motility in rats and human in vitro. Naunyn Schmiedebergs Arch Pharmacol 2011; 384:147-55. [PMID: 21630039 DOI: 10.1007/s00210-011-0658-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Accepted: 05/15/2011] [Indexed: 12/20/2022]
Abstract
Hirschsprung's disease is the congenital absence of generating the peristaltic contractions transmitting from the proximal colon to rectum. We previously have found that tetraethylammonium (TEA), the nonselective Ca(2+)-activated K(+) channel blocker, increases the maximal contractile force and the amplitude of the contraction in rat duodenum. The present study is to test the effect of TEA on motility of colon and rectum from rats and Hirschsprung's disease patients in vitro, in order to find an alternative method to improve the syndrome of Hirschsprung's disease. The rectal and colonic motility was recorded by a tension transducer connected to a biology function experiment system. Histology was analyzed with standard hematoxylin and eosin staining. TEA (1, 3, and 5 mM) significantly increased the amplitude and frequency of contractility of colon and rectum from rats in longitudinal and circular direction. TEA at 5 and 15 mM concentrations showed no effect on histology of colon and rectum from rats that were administered locally with TEA into colon lumen from anus for 10 days. TEA at 15 mM increased the amplitude and frequency of contractions of the colon and rectum from Hirschsprung's disease patients. Our data showed that TEA increased the contractility of colon and rectum from rats and Hirschsprung's disease patients in vitro, suggesting that local administration of TEA in colon or rectum lumen might be an alternative method to ameliorate the syndrome of Hirschsprung's disease patients who are not cured completely by surgery or not suitable for surgery.
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Affiliation(s)
- Zhe Li
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), Harbin Medical University, Harbin, People's Republic of China
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22
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SÁNCHEZ-MEJÍAS AVENCIA, FERNÁNDEZ RAQUELM, ANTIÑOLO GUILLERMO, BORREGO SALUD. A new experimental approach is required in the molecular analysis of intestinal neuronal dysplasia type B patients. Exp Ther Med 2010; 1:999-1003. [PMID: 22993632 PMCID: PMC3446721 DOI: 10.3892/etm.2010.140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Accepted: 07/29/2010] [Indexed: 01/08/2023] Open
Abstract
Intestinal neuronal dysplasia type B (INDB) is characterized by the malformation of the parasympathetic submucous plexus of the gut. It is generally accepted that INDB has a genetic basis, and several genes produce an INDB-like phenotype in mice when disrupted, such as EDNRB. However, no mutations associated with this disease have been identified in several series analysed. In the present studu, we sought to determine whether the EDNRB/EDN3 signalling pathway plays a role in the pathogenesis of INDB in humans. Denaturing high performance liquid chromatography (dHPLC) techniques were employed to screen the EDNRB and EDN3 coding regions in 23 INDB patients. In addition, association studies were performed on these genes with single nucleotide polymorphisms strategically selected and genotyped by TaqMan technology. Although several novel variants were detected in both genes, none of these variants appeared to play a functional role in protein function or expression. Our results indicate that additional screening of other candidate genes in larger patient series is required to elucidate the molecular basis of INDB. Additionally, the systematic lack of positive results in the screening of candidate genes for INDB reported in the literature, together with our results, leads us to propose that INDB may alternatively arise as a consequence of gain of function mutations in genes related to enteric nervous system development. Therefore, the use of different molecular approaches, such as screening for genetic duplication or enhancer mutations, is recommended for future studies on the genetic basis of INDB.
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Affiliation(s)
- AVENCIA SÁNCHEZ-MEJÍAS
- Unidad de Gestión Clínica de Genética, Reproducción y Medicina Fetal, Instituto de Biomedicina de Sevilla (IBIS), Hospitales Universitarios Virgen del Rocío/CSIC/Universidad de Sevilla
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Sevilla,
Spain
| | - RAQUEL M. FERNÁNDEZ
- Unidad de Gestión Clínica de Genética, Reproducción y Medicina Fetal, Instituto de Biomedicina de Sevilla (IBIS), Hospitales Universitarios Virgen del Rocío/CSIC/Universidad de Sevilla
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Sevilla,
Spain
| | - GUILLERMO ANTIÑOLO
- Unidad de Gestión Clínica de Genética, Reproducción y Medicina Fetal, Instituto de Biomedicina de Sevilla (IBIS), Hospitales Universitarios Virgen del Rocío/CSIC/Universidad de Sevilla
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Sevilla,
Spain
| | - SALUD BORREGO
- Unidad de Gestión Clínica de Genética, Reproducción y Medicina Fetal, Instituto de Biomedicina de Sevilla (IBIS), Hospitales Universitarios Virgen del Rocío/CSIC/Universidad de Sevilla
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Sevilla,
Spain
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Hutson JM, Chase JW, Clarke MCC, King SK, Sutcliffe J, Gibb S, Catto-Smith AG, Robertson VJ, Southwell BR. Slow-transit constipation in children: our experience. Pediatr Surg Int 2009; 25:403-6. [PMID: 19396449 DOI: 10.1007/s00383-009-2363-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/30/2009] [Indexed: 02/08/2023]
Abstract
Constipation is a common problem in children, with childhood prevalence estimated at between 1 and 30%. It accounts for a significant percentage of referrals to paediatricians and paediatric gastroenterologists. It commonly runs in families, suggesting either an underlying genetic predisposition or common environmental factors, such as dietary exposure. The peak age for presentation of constipation is shortly after toilet training, when passage of hard stools can cause pain on defecation, which then triggers holding-on behaviour in the child. At the time of the next call to stool the toddler may try to prevent defecation by contraction of the pelvic floor muscles and anal sphincter. Unless the holding-on behaviour is quickly corrected by interventions to soften faeces and prevent further pain, the constipation can very rapidly become severe and chronic. Until recently, this mechanism was thought to be the only significant primary cause of constipation in childhood. In this review, we will summarise recent evidence to suggest that severe chronic constipation in children may also be due to slowed colonic transit.
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Affiliation(s)
- John M Hutson
- Department of Surgery, Royal Children's Hospital, Melbourne, Australia.
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25
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Topography and morphometry of intestinal mast cells in children with Hirschsprung's disease. Folia Histochem Cytobiol 2008; 46:65-8. [PMID: 18296265 DOI: 10.2478/v10042-008-0008-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Mast cells (MC) are source of many biological active compounds like cytokines, arachidonic acid derivates, proteoglicanes, prostaglandins, proteases, free oxygen radials, NGF, PAF and many more. The role of MC in pathogenesis of Hirschsprung's disease (HD) is not clear. Substances produced by MC may exert an important effect on embryology, growth, differentiation and regeneration of intestinal nervous system. Additionally, MC products modulate inflammation processes thus influencing on the clinical course of HD. Present study was established to evaluate the morphologic MC examination as a support of making diagnosis in HD. The MC topography and morphometry were evaluated in specimens collected from aganglionic colon of patients with diagnosed HD. The results were compared with corresponding data from normally innervated colon of patients suffering from constipation, and normal colon of children not presenting defecation problems. MC were visualized using indirect immunohistochemical method LSAB with mouse antibody against human tryptase. The MC visualized in submucosa and muscular layer in Hirschsprung's disease were significantly larger in comparison with control group (p<0.05). Also the number of MC/mm2 in mucosa and lamina propria in HD was significantly elevated (p<0.05). However, the MC density in submucosa was also higher but it was not high statistically significant. In muscular layer and in serosa density of MC/mm2 was not statistically significant. In the intestinal wall MC in aganglionic segment in Hirschsprung's disease are significantly activated comparing with normally innervated colon segments taken from the patients from other groups. This may confirm the role of MC both in pathogenesis of HD and in the reparation processes of bowel nervous system.
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26
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Mattson MP, Wan R. Neurotrophic factors in autonomic nervous system plasticity and dysfunction. Neuromolecular Med 2008; 10:157-68. [PMID: 18172785 DOI: 10.1007/s12017-007-8021-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2007] [Accepted: 11/20/2007] [Indexed: 01/26/2023]
Abstract
During development, neurotrophic factors are known to play important roles in regulating the survival of neurons in the autonomic nervous system (ANS) and the formation of their synaptic connectivity with their peripheral targets in the cardiovascular, digestive, and other organ systems. Emerging findings suggest that neurotrophic factors may also affect the functionality of the ANS during adult life and may, in part, mediate the effects of environmental factors such as exercise and dietary energy intake on ANS neurons and target cells. In this article, we describe the evidence that ANS neurons express receptors for multiple neurotrophic factors, and data suggesting that activation of those receptors can modify plasticity in the ANS. Neurotrophic factors that may regulate ANS function include brain-derived neurotrophic factor, nerve growth factor, insulin-like growth factors, and ciliary neurotrophic factor. The possibility that perturbed neurotrophic factor signaling is involved in the pathogenesis of ANS dysfunction in some neurological disorders is considered, together with implications for neurotrophic factor-based therapeutic interventions.
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Affiliation(s)
- Mark P Mattson
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, MD. USA.
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Abstract
AIM This review highlights the relevance of the neural crest (NC) as a developmental control mechanism involved in several pediatric surgical conditions and the investigative interest of following some of its known signaling pathways. METHODS The participation of the NC in facial clefts, ear defects, branchial fistulae and cysts, heart outflow tract and aortic arch anomalies, pigmentary disorders, abnormal enteric innervation, neural tumors, hemangiomas, and vascular anomalies is briefly reviewed. Then, the literature on clinical and experimental esophageal atresia-tracheoesophageal fistula (EA-TEF) and congenital diaphragmatic hernia (CDH) is reviewed for the presence of associated NC defects. Finally, some of the molecular signaling pathways involved in both conditions (sonic hedgehog, Hox genes, and retinoids) are summarized. RESULTS The association of facial, cardiovascular, thymic, parathyroid, and C-cell defects together with anomalies of extrinsic and intrinsic esophageal innervation in babies and/or animals with both EA-TEF and CDH strongly supports the hypothesis that NC is involved in the pathogenesis of these malformative clusters. On the other hand, both EA-TEF and CDH are observed in mice mutant for genes involved in the previously mentioned signaling pathways. CONCLUSIONS The investigation of NC-related molecular pathogenic pathways involved in malformative associations like EA-TEF and CDH that are induced by chromosomal anomalies, chemical teratogens, and engineered mutations is a promising way of clarifying why and how some pediatric surgical conditions occur. Pediatric surgeons should be actively involved in these investigations.
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MESH Headings
- Abnormalities, Multiple/embryology
- Abnormalities, Multiple/physiopathology
- Abnormalities, Multiple/surgery
- Blood Vessels/abnormalities
- Branchial Region/abnormalities
- Cardiovascular Abnormalities/embryology
- Cardiovascular Abnormalities/physiopathology
- Cell Lineage
- Cell Movement
- Child
- Child, Preschool
- Enteric Nervous System/abnormalities
- Esophageal Atresia/embryology
- Esophageal Atresia/physiopathology
- Esophageal Atresia/surgery
- Face/abnormalities
- Genes, Homeobox
- Hedgehog Proteins/physiology
- Hernia, Diaphragmatic/embryology
- Hernia, Diaphragmatic/physiopathology
- Hernia, Diaphragmatic/surgery
- Hernias, Diaphragmatic, Congenital
- Homeodomain Proteins/physiology
- Humans
- Infant
- Infant, Newborn
- Neoplasms/etiology
- Neural Crest/physiopathology
- Patched Receptors
- Pigmentation Disorders/etiology
- Receptors, Cell Surface/physiology
- Receptors, G-Protein-Coupled/physiology
- Receptors, Retinoic Acid/physiology
- Signal Transduction
- Smoothened Receptor
- Syndrome
- Transcription Factors/physiology
- Tretinoin/physiology
- Zinc Finger Protein GLI1
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Affiliation(s)
- Juan A Tovar
- Departamento de Cirugía Pediátrica, Hospital Universitario La Paz, 28046 Madrid, Spain.
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Insel PA, Tang CM, Hahntow I, Michel MC. Impact of GPCRs in clinical medicine: monogenic diseases, genetic variants and drug targets. BIOCHIMICA ET BIOPHYSICA ACTA 2007; 1768:994-1005. [PMID: 17081496 PMCID: PMC2169201 DOI: 10.1016/j.bbamem.2006.09.029] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2006] [Revised: 09/28/2006] [Accepted: 09/29/2006] [Indexed: 12/15/2022]
Abstract
By virtue of their large number, widespread distribution and important roles in cell physiology and biochemistry, G-protein-coupled receptors (GPCR) play multiple important roles in clinical medicine. Here, we focus on 3 areas that subsume much of the recent work in this aspect of GPCR biology: (1) monogenic diseases of GPCR; (2) genetic variants of GPCR; and (3) clinically useful pharmacological agonists and antagonists of GPCR. Diseases involving mutations of GPCR are rare, occurring in <1/1000 people, but disorders in which antibodies are directed against GPCR are more common. Genetic variants, especially single nucleotide polymorphisms (SNPs), show substantial heterogeneity in frequency among different GPCRs but have not been evaluated for some GPCR. Many therapeutic agonists and antagonists target GPCR and show inter-subject variability in terms of efficacy and toxicity. For most of those agents, it remains an open question whether genetic variation in primary sequence of the GPCR is an important contributor to such inter-subject variability, although this is an active area of investigation.
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Affiliation(s)
- Paul A Insel
- University of California San diego, Department of Pharmacology, La Jolla, CA 92093-0636, USA.
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29
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Abstract
ENS consists of a complex network of neurons, organised in several plexuses, which interact by means of numerous neurotransmitters. It is capable of modulating the intestinal motility, exocrine and endocrine secretions, microcirculation and immune and inflammatory responses within the gastrointestinal tract, independent of the central nervous system. Though the embryological development of various plexuses are completed by mid-way of gestation, the maturation of neurons and nerve plexuses appear to continue well after birth. Therefore, any histological or functional abnormalities related to the gastrointestinal function must be investigated with the ongoing maturational processes in mind.
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Affiliation(s)
- Thambipillai Sri Paran
- Children's Research Centre, Our Lady's Children's Hospital, University College Dublin, Crumlin, Dublin 12, Ireland
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Sangkhathat S, Kusafuka T, Chengkriwate P, Patrapinyokul S, Sangthong B, Fukuzawa M. Mutations and polymorphisms of Hirschsprung disease candidate genes in Thai patients. J Hum Genet 2006; 51:1126-1132. [PMID: 17009072 DOI: 10.1007/s10038-006-0064-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2006] [Accepted: 08/28/2006] [Indexed: 01/24/2023]
Abstract
Mutation and polymorphism data for Hirschsprung disease (HSCR) varies among ethnic groups. Single nucleotide polymorphisms (SNP) of RET proto-oncogene (RET) were recently shown to be associated with the disease, and with disease severity, in different populations. In this study, comprehensive analysis of RET, GDNF, EDNRB, ET-3, and SOX-10 genes among sporadic HSCR in Thailand was conducted by standard PCR-SSCP, RFLP, and sequencing methods. Of 41 patients, 30 cases had rectosigmoid disease (RSD) and 11 cases were assigned to the long-segment disease (LSD) group. Four missense mutations of RET, S100M, R231H, T278N, and G533S, were identified in three patients. One novel missense mutation, V111Q, was detected in EDNRB. For ET-3, two novel missense mutations, D166E and C173R, occurred concomitantly in a patient. The incidence of missense mutation was significantly higher in our female HSCR patient than in the male counterpart. Statistical analysis of the SNPs revealed a significant difference between allele distribution of RET L769L in patients in the LSD and RSD groups. The predominant genotype construct of RET A45A/L769L in our HSCR was GG/GG, which is obviously different from results from all previous studies. The GG/GG genotype construct was associated with RSD and with males. The study also detected a variant allele of RET S836S which has never been reported in Asian cohorts.
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Affiliation(s)
- Surasak Sangkhathat
- Pediatric Surgery Unit, Department of Surgery, Faculty of Medicine, Prince of Songkla University, Hadyai, Songkhla, 90110, Thailand.
- Department of Pediatric Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| | - Takeshi Kusafuka
- Division of Pediatric Surgery, Department of Surgery, Nihon University School of Medicine, 30-1 Oyaguchikami-machi, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Piyawan Chengkriwate
- Pediatric Surgery Unit, Department of Surgery, Faculty of Medicine, Prince of Songkla University, Hadyai, Songkhla, 90110, Thailand
| | - Sakda Patrapinyokul
- Pediatric Surgery Unit, Department of Surgery, Faculty of Medicine, Prince of Songkla University, Hadyai, Songkhla, 90110, Thailand
| | - Burapat Sangthong
- Pediatric Surgery Unit, Department of Surgery, Faculty of Medicine, Prince of Songkla University, Hadyai, Songkhla, 90110, Thailand
| | - Masahiro Fukuzawa
- Department of Pediatric Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
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Abstract
Chronic constipation and fecal incontinence affect 20% of the population and are more prevalent in women, the elderly, those of lower socioeconomic status, and nursing home residents. These disorders pose a significant economic burden and affect quality of life. During the past decade, significant strides have been made in the understanding and treatment of defecation disorders, which have led to real advances in the management of these disorders. These treatments include biofeedback therapy, tegaserod, and lubiprostone for chronic constipation.
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Affiliation(s)
- Jose M Remes-Troche
- GI Division, The University of Iowa Hospital & Clinics, Iowa City, IA 52242, USA
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32
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Abstract
The expression, distribution, origin, projections, chemical coding and functions of cocaine and amphetamine-regulated transcript (CART) in the gastro-intestinal tract are reviewed. CART is extensively expressed in the enteric nervous system. Except from being a possible modulator of NO induced intestinal relaxation CART does not seem to play any pivotal role in intestinal motility. Accumulating evidence suggest CART to be neuroprotective, involved in survival and maintenance of enteric neurons. CART expression increases in atrophic intestine thus suggesting a role of CART in intestinal adaptation. In rat antral mucosa CART is expressed in gastrin cells indicating a hormonal role of gastric CART.
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Affiliation(s)
- Eva Ekblad
- Department of Experimental Medical Science, Neurogastroenterology Unit, BMC F10, SE 221 84 Lund, Sweden.
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Abstract
The acute abdomen in the newborn provides challenging problems from many aspects, not only with regard to diagnosis, resuscitation and treatment, but also now with prenatal management. Most conditions are uncommon and treatment in specialist centres enables concentration of appropriate resources and expertise. Co-morbidity is common, particularly in the preterm or low birth weight infant. A multi-disciplinary team of surgeons, anaesthetists, neonatologists, radiologists, cardiologists, obstetricians, nurses, physiotherapists and other health professionals experienced in dealing with extremely small infants will provide the best outcome. The infant should be resuscitated and, as soon as conditions permit, transferred to a specialist surgical centre with intravenous fluids, gastric tube drainage and circulatory, respiratory and general support as needed. This involves close liaison within healthcare networks and readily available patient transfer facilities. Surgery itself should be carried out in a theatre fully equipped for neonatal surgery. A gentle touch is essential because of the fragility of the tissues, and painstaking care should be taken with blood loss.
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Affiliation(s)
- M N de la Hunt
- Department of Paediatric Surgery, Royal Victoria Infirmary, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, UK.
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Mecklenburg I, Leibig M, Weber C, Schmidbauer S, Folwaczny C. Recurrent severe gastrointestinal bleeding and malabsorption due to extensive habitual megacolon. World J Gastroenterol 2006; 11:7686-7. [PMID: 16437700 PMCID: PMC4727221 DOI: 10.3748/wjg.v11.i48.7686] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Dilatation of the colon and the rectum, which is not attributable to aganglionosis, is a rare finding and can be the result of intractable chronic constipation. We report a rare case of a 29-year-old male patient with impressive megacolon, in whom Hirschsprung's or Chagas disease was ruled out. In the present case, dilatation of the colon was most likely due to a behavioral disorder with habitual failure of defecation. Chronic stool retention led to a bizarre bulging of the large bowel with displacement of the other abdominal organs and severe occult blood loss. Because of two episodes of life-threatening gastrointestinal bleeding despite conventional treatment of constipation, a surgical approach for bowel restoration was necessary. Temporary loop ileostomy had to be performed for de-pressurization of the large bowel and the subsequent possibility for effective antegrade colonic lavage to remove impacted stools. Shortly after the operation, the patient was healthy and could easily manage the handling of the ileostomy. However, the course of the megacolon in this young adult cannot be predicted and the follow-up will have to reveal if regression of this extreme colonic distension with reestablishment of regular rectal perception will occur.
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Affiliation(s)
- Ingo Mecklenburg
- Department of Gastroenterology and Endoscopy, Medizinische Poliklinik, Klinikum Innenstadt, Ludwig-Maximilians-University, Pettenkoferstr. 8a, 80336 Munich, Germany
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Matsuda H, Hirato J, Kuroiwa M, Nakazato Y. Histopathological and immunohistochemical study of the enteric innervations among various types of aganglionoses including isolated and syndromic Hirschsprung disease. Neuropathology 2006; 26:8-23. [PMID: 16521475 DOI: 10.1111/j.1440-1789.2006.00649.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We investigated enteric innervations in 15 isolated and five syndromic cases of Hirschsprung disease (HSCR) with immunohistochemistry for the S100 protein (S100), class III a-tubulin (TUJ1), peripherin, neuronal nitric oxide synthase (nNOS) and CD34. The number of neurites per smooth muscle unit of the circular muscle layer (CML) was counted in the longitudinal sections. TUJ1 was the best marker to detect whole neuritic networks of the enteric nervous system. There were differences in the innervation patterns between isolated rectosigmoid aganglionosis (RS) and long segment aganglionosis (LS) including total colonic aganglionosis and extensive aganglionosis. In the aganglionic bowel (AGB) of LS, no nerve fibers innervated smooth muscle units in the CML in the area from the small bowel to the terminal descending colon. In the rectosigmoid region of every type of isolated HSCR, we observed transmural nerve fibers forming meshworks in the CML with TUJ1 and S100 antibodies. In RS, the neurites running parallel with smooth muscle cells gradually decreased in number in the distal portion. However, in the rectosigmoid AGB in LS, those neurites were absent and most neurites perpendicularly crossed the CML. Hypertrophic nerve trunks (HNT) in the submucous and myenteric plexuses were observed more frequently in the rectosigmoid region than in the rostral portion. Based on these data, it is suggested that the neuritic meshworks in the CML of the rectosigmoid AGB might derive from not only the sacral plexus, via HNT, but also intrinsic neurons in the oligoganglionic bowel. All of the syndromic HSCR were RS. In the AGB of RS with Down syndrome, the distribution of neurite meshworks in the CML is markedly reduced. In the AGB of RS with mental retardation suspected of having Mowat-Wilson syndrome, the density of intramuscular innervation was comparatively higher. In the rostral portion to the AGB of syndromic HSCR, myenteric ganglia were clearly small in size, and more numerous per smooth muscle unit with scarce internodal strands. These dysplastic features fall under neither hyperganglionosis nor hypoganglionosis classifications. We considered that syndromic HSCR might occur on the basis of a dysplastic enteric nervous system caused by genetic alteration.
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Affiliation(s)
- Hadzki Matsuda
- Department of Human Pathology, Gunma University Graduate School of Medicine, Maebashi, Japan
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Masiakos PT, Ein SH. The History of Hirschsprung’s Disease: Then and Now. SEMINARS IN COLON AND RECTAL SURGERY 2006. [DOI: 10.1053/j.scrs.2006.02.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Affiliation(s)
- A Mortell
- Children's Research Centre, Our Lady's Hospital for Sick Children, Crumlin, Dublin 12, Ireland
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O'Donnell AM, Bannigan J, Puri P. Differences in nitrergic innervation of the developing chick cloaca and colorectum. Pediatr Surg Int 2006; 22:90-4. [PMID: 16328330 DOI: 10.1007/s00383-005-1590-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The intrinsic innervation of the developing gut has long been a subject of investigation, but little is known regarding that of the embryonic cloaca. The cloaca, like the rest of the gastrointestinal tract, is intrinsically innervated by the enteric nervous system. Nitrergic neurons and fibres make up a large part of this system, thus, their distribution provides us with a useful insight into its development. Cloacal and colorectal tissue specimens were removed from chick embryos at embryonic days 11 (E11), E15 and E19. NADPH-diaphorase (NADPH-d) histochemistry was carried out using whole mount tissue preparations. Ganglia density, the number of NADPH-d-positive cells per ganglia in the myenteric plexus and cell size were calculated and statistical analysis was performed to compare both regions of the gut (P<0.001). There were significant differences in the ganglia density in the cloaca compared to the colorectum at E11 (P<0.05) and E15 (P<0.01), with the colorectum having a much denser network. In both the cloaca and the colorectum, ganglia density significantly decreased with age (P<0.001), while significant differences were observed in the number of NADPH-d-positive cells per ganglia in both regions through development. Total cell size was similar in both the cloaca and colorectum at each stage and increased in both regions through development, predominantly due to an increase in the cytoplasm. Results reveal striking differences in innervation between the chick embryo cloaca and colorectum. The sparse network of innervation evident within the cloaca in contrast to the dense network within the colorectum emphasizes the individuality of both regions. These results highlight the need for a further in-depth analysis of the enteric nervous system's development within the embryonic cloaca.
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Affiliation(s)
- A M O'Donnell
- The Children's Research Centre, Our Lady's Hospital for Sick Children, Crumlin, Ireland
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