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Batura V, Moradin N, Leung G, Guo C, Murchie R, Warner N, Muise A. A89 FUNCTIONAL ANALYSIS OF NEUTROPHIL CYTOSOLIC FACTOR 4 (NCF4) IN THE PATHOGENESIS OF PEDIATRIC INFLAMMATORY BOWEL DISEASE. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy009.089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- V Batura
- University of Toronto, Toronto, ON, Canada
| | - N Moradin
- The Hospital for Sick Children, Toronto, ON, Canada
| | - G Leung
- The Hospital for Sick Children, Toronto, ON, Canada
| | - C Guo
- The Hospital for Sick Children, Toronto, ON, Canada
| | - R Murchie
- The Hospital for Sick Children, Toronto, ON, Canada
| | - N Warner
- The Hospital for Sick Children, Toronto, ON, Canada
| | - A Muise
- The Hospital for Sick Children, Toronto, ON, Canada
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2
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Leung G, Warner N, Murchie R, Muise A. A101 ARPC1B-DEFICIENT B CELLS DISPLAY ABERRANT SPREADING BEHAVIOUR. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy009.101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- G Leung
- The Hospital for Sick Children, Toronto, ON, Canada
| | - N Warner
- The Hospital for Sick Children, Toronto, ON, Canada
| | - R Murchie
- The Hospital for Sick Children, Toronto, ON, Canada
| | - A Muise
- Hospital for Sick Children, Toronto, ON, Canada
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3
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Jardine S, Leung G, Guo C, Murchie R, Dhingani N, Warner N, Pan J, Muise A. A99 RESCUING TTC7A MUTANT PHENOTYPES ASSOCIATED WITH VERY EARLY ONSET INFLAMMATORY BOWEL DISEASE (VEO-IBD). J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy009.099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S Jardine
- Cell Biology, The Hospital for Sick Children, TORONTO, ON, Canada
| | - G Leung
- The Hospital for Sick Children, Toronto, ON, Canada
| | - C Guo
- The Hospital for Sick Children, Toronto, ON, Canada
| | - R Murchie
- The Hospital for Sick Children, Toronto, ON, Canada
| | - N Dhingani
- Biochemistry, University of Toronto, Toronto, ON, Canada
| | - N Warner
- The Hospital for Sick Children, Toronto, ON, Canada
| | - J Pan
- Hospital for Sick Children, Toronto, ON, Canada
| | - A Muise
- Hospital for Sick Children, Toronto, ON, Canada
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4
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Omary Z, Pan J, Warner N, Murchie R, Guo C, Safi F, Brumell J, Muise A. A124 UNDERSTANDING THE ROLE OF LRBA AND CHARACTERIZING THE PHENOTYPE OF LRBA-DEFICIENCY IN PATIENTS WITH INFLAMMATORY BOWEL DISEASE. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy009.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Z Omary
- Biochemistry, University of Toronto, Toronto, ON, Canada
| | - J Pan
- SickKids, Toronto, ON, Canada
| | | | | | - C Guo
- SickKids, Toronto, ON, Canada
| | - F Safi
- Hospital for Sick Children, Toronto, ON, Canada
| | - J Brumell
- Cell Biology, Hospital for Sick Children, Toronto, ON, Canada
| | - A Muise
- Hospital for Sick Children, Toronto, ON, Canada
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5
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Dhingani N, Guo C, Warner N, Murchie R, Muise A. A276 INVESTIGATING THE ROLE OF TTC7A THROUGH ITS INTERACTION WITH UBR5 TO MAINTAIN CELL SURVIVAL. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy008.277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- N Dhingani
- Hospital for Sick Children, Toronto, ON, Canada
| | - C Guo
- Hospital for Sick Children, Toronto, ON, Canada
| | - N Warner
- Hospital for Sick Children, Toronto, ON, Canada
| | - R Murchie
- Hospital for Sick Children, Toronto, ON, Canada
| | - A Muise
- Hospital for Sick Children, Toronto, ON, Canada
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6
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Bronte-Tinkew DM, Dang F, Hsieh A, McGillis LH, Verapalan I, Murchie R, Capurro M, Greenfield LK, Philpott D, Jones N. A15 VITAMIN D DEFICIENCY PROMOTES INTESTINAL AUTOPHAGY DYSFUNCTION VIA EPIGENETIC REGULATION INVOLVING MIR142-3P IN VITRO AND IN VIVO. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy009.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- D M Bronte-Tinkew
- Departments of Paediatrics and Physiology, University of Toronto; Cell Biology Program, Peter Gilgan Centre for Research & Learning and Division of Gastroenterology, Hepatology and Nutrition, Hospital For Sick Children, Toronto, ON, Canada
| | - F Dang
- Departments of Paediatrics and Physiology, University of Toronto; Cell Biology Program, Peter Gilgan Centre for Research & Learning and Division of Gastroenterology, Hepatology and Nutrition, Hospital For Sick Children, Toronto, ON, Canada
| | - A Hsieh
- Departments of Paediatrics and Physiology, University of Toronto; Cell Biology Program, Peter Gilgan Centre for Research & Learning and Division of Gastroenterology, Hepatology and Nutrition, Hospital For Sick Children, Toronto, ON, Canada
| | - L H McGillis
- Departments of Paediatrics and Physiology, University of Toronto; Cell Biology Program, Peter Gilgan Centre for Research & Learning and Division of Gastroenterology, Hepatology and Nutrition, Hospital For Sick Children, Toronto, ON, Canada
| | - I Verapalan
- Departments of Paediatrics and Physiology, University of Toronto; Cell Biology Program, Peter Gilgan Centre for Research & Learning and Division of Gastroenterology, Hepatology and Nutrition, Hospital For Sick Children, Toronto, ON, Canada
| | - R Murchie
- Departments of Paediatrics and Physiology, University of Toronto; Cell Biology Program, Peter Gilgan Centre for Research & Learning and Division of Gastroenterology, Hepatology and Nutrition, Hospital For Sick Children, Toronto, ON, Canada
| | - M Capurro
- Departments of Paediatrics and Physiology, University of Toronto; Cell Biology Program, Peter Gilgan Centre for Research & Learning and Division of Gastroenterology, Hepatology and Nutrition, Hospital For Sick Children, Toronto, ON, Canada
| | - L K Greenfield
- Departments of Paediatrics and Physiology, University of Toronto; Cell Biology Program, Peter Gilgan Centre for Research & Learning and Division of Gastroenterology, Hepatology and Nutrition, Hospital For Sick Children, Toronto, ON, Canada
| | - D Philpott
- Department of Immunology, University of Toronto, Toronto, ON, Canada
| | - N Jones
- Departments of Paediatrics and Physiology, University of Toronto; Cell Biology Program, Peter Gilgan Centre for Research & Learning and Division of Gastroenterology, Hepatology and Nutrition, Hospital For Sick Children, Toronto, ON, Canada
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7
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Leung G, Elkadri A, Murchie R, Thoeni CE, Muise A. A79 CHARACTERIZATION OF VIPOMA-MEDIATED INTESTINAL EPITHELIAL CELL SECRETION. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy008.080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- G Leung
- The Hospital for Sick Children, Toronto, ON, Canada
| | - A Elkadri
- The Hospital for Sick Children, Toronto, ON, Canada
| | - R Murchie
- The Hospital for Sick Children, Toronto, ON, Canada
| | - C E Thoeni
- The Hospital for Sick Children, Toronto, ON, Canada
| | - A Muise
- The Hospital for Sick Children, Toronto, ON, Canada
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8
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Ishige T, Guo C, Warner N, Pan J, Hossain K, Dhingani N, Murchie R, Muise A. A81 FUNCTIONAL ANALYSIS IMPLICATING SAMD9 MUTATION FOR INTESTINAL INFLAMMATION IN PATIENTS WITH MIRAGE SYNDROME AND INFLAMMATORY BOWEL DISEASE. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy009.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- T Ishige
- Cell Biology, The Hospital for Sick Children, Toronto, ON, Canada
| | - C Guo
- Cell Biology, The Hospital for Sick Children, Toronto, ON, Canada
| | - N Warner
- Cell Biology, The Hospital for Sick Children, Toronto, ON, Canada
| | - J Pan
- Cell Biology, The Hospital for Sick Children, Toronto, ON, Canada
| | - K Hossain
- Cell Biology, The Hospital for Sick Children, Toronto, ON, Canada
| | - N Dhingani
- Cell Biology, The Hospital for Sick Children, Toronto, ON, Canada
| | - R Murchie
- Cell Biology, The Hospital for Sick Children, Toronto, ON, Canada
| | - A Muise
- Cell Biology, The Hospital for Sick Children, Toronto, ON, Canada
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9
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Kahr WHA, Pluthero FG, Elkadri A, Warner N, Drobac M, Chen CH, Lo RW, Li L, Li R, Li Q, Thoeni C, Pan J, Leung G, Lara-Corrales I, Murchie R, Cutz E, Laxer RM, Upton J, Roifman CM, Yeung RSM, Brumell JH, Muise AM. Loss of the Arp2/3 complex component ARPC1B causes platelet abnormalities and predisposes to inflammatory disease. Nat Commun 2017; 8:14816. [PMID: 28368018 PMCID: PMC5382316 DOI: 10.1038/ncomms14816] [Citation(s) in RCA: 143] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 01/31/2017] [Indexed: 12/19/2022] Open
Abstract
Human actin-related protein 2/3 complex (Arp2/3), required for actin filament branching, has two ARPC1 component isoforms, with ARPC1B prominently expressed in blood cells. Here we show in a child with microthrombocytopenia, eosinophilia and inflammatory disease, a homozygous frameshift mutation in ARPC1B (p.Val91Trpfs*30). Platelet lysates reveal no ARPC1B protein and greatly reduced Arp2/3 complex. Missense ARPC1B mutations are identified in an unrelated patient with similar symptoms and ARPC1B deficiency. ARPC1B-deficient platelets are microthrombocytes similar to those seen in Wiskott–Aldrich syndrome that show aberrant spreading consistent with loss of Arp2/3 function. Knockout of ARPC1B in megakaryocytic cells results in decreased proplatelet formation, and as observed in platelets from patients, increased ARPC1A expression. Thus loss of ARPC1B produces a unique set of platelet abnormalities, and is associated with haematopoietic/immune symptoms affecting cell lineages where this isoform predominates. In agreement with recent experimental studies, our findings suggest that ARPC1 isoforms are not functionally interchangeable. ARPC1B is a component of the actin-related protein 2/3 complex (Arp2/3), which is required for actin filament branching. Kahr et al. show that ARPC1B deficiency in humans is associated with severe multisystem disease that includes platelet abnormalities, eosinophilia, eczema and other indicators of immune disease.
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Affiliation(s)
- Walter H A Kahr
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4.,Division of Haematology/Oncology, Department of Paediatrics, University of Toronto and The Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8.,Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada M5S 1A8
| | - Fred G Pluthero
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4
| | - Abdul Elkadri
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4.,SickKids Inflammatory Bowel Disease Center and Division of Gastroenterology, Hepatology, and Nutrition, Department of Paediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8.,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada M5S 1A8
| | - Neil Warner
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4.,SickKids Inflammatory Bowel Disease Center and Division of Gastroenterology, Hepatology, and Nutrition, Department of Paediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8
| | - Marko Drobac
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4.,Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada M5S 1A8
| | - Chang Hua Chen
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4.,Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada M5S 1A8
| | - Richard W Lo
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4.,Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada M5S 1A8
| | - Ling Li
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4
| | - Ren Li
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4
| | - Qi Li
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4.,SickKids Inflammatory Bowel Disease Center and Division of Gastroenterology, Hepatology, and Nutrition, Department of Paediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8
| | - Cornelia Thoeni
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4.,SickKids Inflammatory Bowel Disease Center and Division of Gastroenterology, Hepatology, and Nutrition, Department of Paediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8
| | - Jie Pan
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4.,SickKids Inflammatory Bowel Disease Center and Division of Gastroenterology, Hepatology, and Nutrition, Department of Paediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8
| | - Gabriella Leung
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4.,SickKids Inflammatory Bowel Disease Center and Division of Gastroenterology, Hepatology, and Nutrition, Department of Paediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8
| | - Irene Lara-Corrales
- Division of Pathology, The Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8
| | - Ryan Murchie
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4.,SickKids Inflammatory Bowel Disease Center and Division of Gastroenterology, Hepatology, and Nutrition, Department of Paediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8
| | - Ernest Cutz
- Division of Pathology, The Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8
| | - Ronald M Laxer
- Division of Rheumatology, Department of Paediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8.,Department of Medicine, University of Toronto, Toronto, Ontario, Canada M5S 1A8
| | - Julia Upton
- Division of Immunology, Department of Paediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8
| | - Chaim M Roifman
- Division of Immunology, Department of Paediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8
| | - Rae S M Yeung
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4.,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada M5S 1A8.,Division of Rheumatology, Department of Paediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8.,Department of Immunology, University of Toronto, Toronto, Ontario, Canada M5S 1A8
| | - John H Brumell
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4.,SickKids Inflammatory Bowel Disease Center and Division of Gastroenterology, Hepatology, and Nutrition, Department of Paediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8.,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada M5S 1A8.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada M5S 1A8
| | - Aleixo M Muise
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada M5G 0A4.,Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada M5S 1A8.,SickKids Inflammatory Bowel Disease Center and Division of Gastroenterology, Hepatology, and Nutrition, Department of Paediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8.,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada M5S 1A8
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10
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Li Q, Lee CH, Peters LA, Mastropaolo LA, Thoeni C, Elkadri A, Schwerd T, Zhu J, Zhang B, Zhao Y, Hao K, Dinarzo A, Hoffman G, Kidd BA, Murchie R, Adham ZA, Guo C, Kotlarz D, Cutz E, Walters TD, Shouval DS, Curran M, Dobrin R, Brodmerkel C, Snapper SB, Klein C, Brumell JH, Hu M, Nanan R, Snanter-Nanan B, Wong M, Le Deist F, Haddad E, Roifman CM, Deslandres C, Griffiths AM, Gaskin KJ, Uhlig HH, Schadt EE, Muise AM. Variants in TRIM22 That Affect NOD2 Signaling Are Associated With Very-Early-Onset Inflammatory Bowel Disease. Gastroenterology 2016; 150:1196-1207. [PMID: 26836588 PMCID: PMC4842103 DOI: 10.1053/j.gastro.2016.01.031] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 01/22/2016] [Accepted: 01/22/2016] [Indexed: 12/17/2022]
Abstract
BACKGROUND & AIMS Severe forms of inflammatory bowel disease (IBD) that develop in very young children can be caused by variants in a single gene. We performed whole-exome sequence (WES) analysis to identify genetic factors that might cause granulomatous colitis and severe perianal disease, with recurrent bacterial and viral infections, in an infant of consanguineous parents. METHODS We performed targeted WES analysis of DNA collected from the patient and her parents. We validated our findings by a similar analysis of DNA from 150 patients with very-early-onset IBD not associated with known genetic factors analyzed in Toronto, Oxford, and Munich. We compared gene expression signatures in inflamed vs noninflamed intestinal and rectal tissues collected from patients with treatment-resistant Crohn's disease who participated in a trial of ustekinumab. We performed functional studies of identified variants in primary cells from patients and cell culture. RESULTS We identified a homozygous variant in the tripartite motif containing 22 gene (TRIM22) of the patient, as well as in 2 patients with a disease similar phenotype. Functional studies showed that the variant disrupted the ability of TRIM22 to regulate nucleotide binding oligomerization domain containing 2 (NOD2)-dependent activation of interferon-beta signaling and nuclear factor-κB. Computational studies demonstrated a correlation between the TRIM22-NOD2 network and signaling pathways and genetic factors associated very early onset and adult-onset IBD. TRIM22 is also associated with antiviral and mycobacterial effectors and markers of inflammation, such as fecal calprotectin, C-reactive protein, and Crohn's disease activity index scores. CONCLUSIONS In WES and targeted exome sequence analyses of an infant with severe IBD characterized by granulomatous colitis and severe perianal disease, we identified a homozygous variant of TRIM22 that affects the ability of its product to regulate NOD2. Combined computational and functional studies showed that the TRIM22-NOD2 network regulates antiviral and antibacterial signaling pathways that contribute to inflammation. Further study of this network could lead to new disease markers and therapeutic targets for patients with very early and adult-onset IBD.
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Affiliation(s)
- Qi Li
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada
| | - Cheng Hiang Lee
- Gastroenterology Department, The Children's Hospital at Westmead, Westmead, 2145, New South Wales, Australia,The James Fairfax Institute of Paediatric Nutrition, the University of Sydney, New South Wales, Australia
| | - Lauren A Peters
- Icahn School of Medicine at Mount Sinai, New York, New York, USA. Graduate School of Biomedical Sciences, New York, New York, USA,Icahn School of Medicine at Mount Sinai, Department of Genetics and Genomic Sciences and the Icahn Institute for Genomics and Multiscale Biology, New York, NY 10029
| | - Lucas A Mastropaolo
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada
| | - Cornelia Thoeni
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada
| | - Abdul Elkadri
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada,Institute of Medical Science, University of Toronto, Toronto, ON, Canada
| | - Tobias Schwerd
- Translational Gastroenterology Unit, Nuffield Department Clinical Medicine, Experimental Medicine Division, University of Oxford, and Department of Pediatrics, John Radcliffe Hospital, Oxford, UK
| | - Jun Zhu
- Icahn School of Medicine at Mount Sinai, Department of Genetics and Genomic Sciences and the Icahn Institute for Genomics and Multiscale Biology, New York, NY 10029
| | - Bin Zhang
- Icahn School of Medicine at Mount Sinai, Department of Genetics and Genomic Sciences and the Icahn Institute for Genomics and Multiscale Biology, New York, NY 10029
| | - Yongzhong Zhao
- Icahn School of Medicine at Mount Sinai, Department of Genetics and Genomic Sciences and the Icahn Institute for Genomics and Multiscale Biology, New York, NY 10029
| | - Ke Hao
- Icahn School of Medicine at Mount Sinai, Department of Genetics and Genomic Sciences and the Icahn Institute for Genomics and Multiscale Biology, New York, NY 10029
| | - Antonio Dinarzo
- Icahn School of Medicine at Mount Sinai, Department of Genetics and Genomic Sciences and the Icahn Institute for Genomics and Multiscale Biology, New York, NY 10029
| | - Gabriel Hoffman
- Icahn School of Medicine at Mount Sinai, Department of Genetics and Genomic Sciences and the Icahn Institute for Genomics and Multiscale Biology, New York, NY 10029
| | - Brian A Kidd
- Icahn School of Medicine at Mount Sinai, Department of Genetics and Genomic Sciences and the Icahn Institute for Genomics and Multiscale Biology, New York, NY 10029
| | - Ryan Murchie
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada
| | - Ziad Al Adham
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada,Institute of Medical Science, University of Toronto, Toronto, ON, Canada
| | - Conghui Guo
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada
| | - Daniel Kotlarz
- Department of Pediatrics, Dr. von Hauner Children's Hospital, Ludwig-Maximilians-University, Munich, Germany
| | - Ernest Cutz
- Division of Pathology, The Hospital for Sick Children, Toronto, Canada
| | - Thomas D Walters
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada
| | - Dror S Shouval
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Boston Children's Hospital, Harvard Medical School, Boston, USA
| | - Mark Curran
- Janssen R&D, LLC, 1400 McKean Road, Spring House, PA 19477
| | - Radu Dobrin
- Janssen R&D, LLC, 1400 McKean Road, Spring House, PA 19477
| | | | - Scott B Snapper
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Boston Children's Hospital, Harvard Medical School, Boston, USA,Division of Gastroenterology and Hepatology, Brigham & Women's Hospital, Department of Medicine, Boston, USA
| | - Christoph Klein
- Department of Pediatrics, Dr. von Hauner Children's Hospital, Ludwig-Maximilians-University, Munich, Germany
| | - John H Brumell
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada,Institute of Medical Science, University of Toronto, Toronto, ON, Canada,Molecular Genetics, University of Toronto
| | - Mingjing Hu
- Gastroenterology Department, The Children's Hospital at Westmead, Westmead, 2145, New South Wales, Australia,The James Fairfax Institute of Paediatric Nutrition, the University of Sydney, New South Wales, Australia
| | - Ralph Nanan
- Gastroenterology Department, The Children's Hospital at Westmead, Westmead, 2145, New South Wales, Australia,The James Fairfax Institute of Paediatric Nutrition, the University of Sydney, New South Wales, Australia
| | - Brigitte Snanter-Nanan
- Gastroenterology Department, The Children's Hospital at Westmead, Westmead, 2145, New South Wales, Australia,The James Fairfax Institute of Paediatric Nutrition, the University of Sydney, New South Wales, Australia
| | - Melanie Wong
- Immunology Department, The Children's Hospital at Westmead, Westmead, 2145, New South Wales, Australia
| | - Francoise Le Deist
- Department of Microbiology and Immunology, CHU Sainte Justine and Department of Microbiology, Infectiology and Immunology, University of Montreal, QC, Canada
| | - Elie Haddad
- CHU Sainte-Justine, Department of Pediatrics, Department of Microbiology, Infectiology and Immunology, University of Montreal, QC, Canada
| | - Chaim M Roifman
- Division of Immunology, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Canada
| | - Colette Deslandres
- Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, CHU Sainte-Justine, Montreal, QC, Canada
| | - Anne M Griffiths
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada
| | - Kevin J Gaskin
- Gastroenterology Department, The Children's Hospital at Westmead, Westmead, 2145, New South Wales, Australia,The James Fairfax Institute of Paediatric Nutrition, the University of Sydney, New South Wales, Australia
| | - Holm H Uhlig
- Translational Gastroenterology Unit, Nuffield Department Clinical Medicine, Experimental Medicine Division, University of Oxford, and Department of Pediatrics, John Radcliffe Hospital, Oxford, UK
| | - Eric E Schadt
- Icahn School of Medicine at Mount Sinai, Department of Genetics and Genomic Sciences and the Icahn Institute for Genomics and Multiscale Biology, New York, NY 10029
| | - Aleixo M Muise
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada; Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada.
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11
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Zhang W, Wu KP, Sartori MA, Kamadurai HB, Ordureau A, Jiang C, Mercredi PY, Murchie R, Hu J, Persaud A, Mukherjee M, Li N, Doye A, Walker JR, Sheng Y, Hao Z, Li Y, Brown KR, Lemichez E, Chen J, Tong Y, Harper JW, Moffat J, Rotin D, Schulman BA, Sidhu SS. System-Wide Modulation of HECT E3 Ligases with Selective Ubiquitin Variant Probes. Mol Cell 2016; 62:121-36. [PMID: 26949039 DOI: 10.1016/j.molcel.2016.02.005] [Citation(s) in RCA: 124] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 01/23/2016] [Accepted: 02/03/2016] [Indexed: 11/20/2022]
Abstract
HECT-family E3 ligases ubiquitinate protein substrates to control virtually every eukaryotic process and are misregulated in numerous diseases. Nonetheless, understanding of HECT E3s is limited by a paucity of selective and potent modulators. To overcome this challenge, we systematically developed ubiquitin variants (UbVs) that inhibit or activate HECT E3s. Structural analysis of 6 HECT-UbV complexes revealed UbV inhibitors hijacking the E2-binding site and activators occupying a ubiquitin-binding exosite. Furthermore, UbVs unearthed distinct regulation mechanisms among NEDD4 subfamily HECTs and proved useful for modulating therapeutically relevant targets of HECT E3s in cells and intestinal organoids, and in a genetic screen that identified a role for NEDD4L in regulating cell migration. Our work demonstrates versatility of UbVs for modulating activity across an E3 family, defines mechanisms and provides a toolkit for probing functions of HECT E3s, and establishes a general strategy for systematic development of modulators targeting families of signaling proteins.
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Affiliation(s)
- Wei Zhang
- Donnelly Centre for Cellular and Biomolecular Research, Banting and Best Department of Medical Research, University of Toronto, 160 College Street, Toronto, ON M5S3E1, Canada
| | - Kuen-Phon Wu
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Maria A Sartori
- Donnelly Centre for Cellular and Biomolecular Research, Banting and Best Department of Medical Research, University of Toronto, 160 College Street, Toronto, ON M5S3E1, Canada
| | - Hari B Kamadurai
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Alban Ordureau
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA
| | - Chong Jiang
- Program in Cell Biology, Hospital for Sick Children, and Department of Biochemistry, University of Toronto, Toronto, ON M5G 0A4, Canada
| | - Peter Y Mercredi
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Ryan Murchie
- Program in Cell Biology, Hospital for Sick Children, and Department of Biochemistry, University of Toronto, Toronto, ON M5G 0A4, Canada
| | - Jicheng Hu
- Structural Genomics Consortium, University of Toronto, Toronto, ON M5G1L7, Canada
| | - Avinash Persaud
- Program in Cell Biology, Hospital for Sick Children, and Department of Biochemistry, University of Toronto, Toronto, ON M5G 0A4, Canada
| | - Manjeet Mukherjee
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Nan Li
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030, USA
| | - Anne Doye
- Inserm U1065, Centre Méditerranéen de Médecine Moléculaire, C3M, Equipe Labellisée La Ligue Contre Le Cancer, Université de Nice-Sophia Antipolis, 151 Route St Antoine de Ginestière, BP 2 3194, 06204 Nice Cedex, France
| | - John R Walker
- Structural Genomics Consortium, University of Toronto, Toronto, ON M5G1L7, Canada
| | - Yi Sheng
- Department of Biology, York University, Toronto, Ontario M3J1P3, Canada
| | - Zhenyue Hao
- Campbell Family Cancer Research Institute, University Health Network, Toronto, ON M5G2C1, Canada
| | - Yanjun Li
- Structural Genomics Consortium, University of Toronto, Toronto, ON M5G1L7, Canada
| | - Kevin R Brown
- Donnelly Centre for Cellular and Biomolecular Research, Banting and Best Department of Medical Research, University of Toronto, 160 College Street, Toronto, ON M5S3E1, Canada
| | - Emmanuel Lemichez
- Inserm U1065, Centre Méditerranéen de Médecine Moléculaire, C3M, Equipe Labellisée La Ligue Contre Le Cancer, Université de Nice-Sophia Antipolis, 151 Route St Antoine de Ginestière, BP 2 3194, 06204 Nice Cedex, France
| | - Junjie Chen
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030, USA
| | - Yufeng Tong
- Structural Genomics Consortium, University of Toronto, Toronto, ON M5G1L7, Canada; Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON M5G1L7, Canada
| | - J Wade Harper
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA
| | - Jason Moffat
- Donnelly Centre for Cellular and Biomolecular Research, Banting and Best Department of Medical Research, University of Toronto, 160 College Street, Toronto, ON M5S3E1, Canada; Department of Molecular Genetics, University of Toronto, 1 King's College Cir, Toronto, ON M5S1A8, Canada
| | - Daniela Rotin
- Program in Cell Biology, Hospital for Sick Children, and Department of Biochemistry, University of Toronto, Toronto, ON M5G 0A4, Canada
| | - Brenda A Schulman
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Howard Hughes Medical Institute, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
| | - Sachdev S Sidhu
- Donnelly Centre for Cellular and Biomolecular Research, Banting and Best Department of Medical Research, University of Toronto, 160 College Street, Toronto, ON M5S3E1, Canada; Department of Molecular Genetics, University of Toronto, 1 King's College Cir, Toronto, ON M5S1A8, Canada.
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12
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Elkadri A, Thoeni C, Deharvengt SJ, Murchie R, Guo C, Stavropoulos JD, Marshall CR, Wales P, Bandsma RH, Cutz E, Roifman CM, Chitayat D, Avitzur Y, Stan RV, Muise AM. Mutations in Plasmalemma Vesicle Associated Protein Result in Sieving Protein-Losing Enteropathy Characterized by Hypoproteinemia, Hypoalbuminemia, and Hypertriglyceridemia. Cell Mol Gastroenterol Hepatol 2015; 1. [PMID: 26207260 PMCID: PMC4507283 DOI: 10.1016/j.jcmgh.2015.05.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS METHODS Severe intestinal diseases observed in very young children are often the result of monogenic defects. We used whole exome sequencing (WES) to examine the genetic cause in a patient with a distinct severe form of protein losing enteropathy (PLE) characterized by hypoproteinemia, hypoalbuminemia, and hypertriglyceridemia. METHODS WES was performed at the Centre for Applied Genomics, Hospital for Sick Children, Toronto, Canada. Exome library preparation was performed using the Ion Torrent AmpliSeq RDY Exome Kit. Functional studies were carried out based on the identified mutation. RESULTS Using whole exome sequencing we identified a homozygous nonsense mutation (1072C>T; p.Arg358*) in the PLVAP (plasmalemma vesicle associated protein) gene in an infant from consanguineous parents who died at five months of age of severe protein losing enteropathy. Functional studies determined that the mutated PLVAP mRNA and protein were not expressed in the patient biopsy tissues, presumably secondary to nonsense-mediated mRNA decay. Pathological analysis showed that the loss of PLVAP resulted in disruption of endothelial fenestrated diaphragms. CONCLUSIONS PLVAP p.Arg358* mutation resulted in loss of PLVAP expression with subsequent deletion of the diaphragms of endothelial fenestrae leading to plasma protein extravasation, protein-losing enteropathy and ultimately death.
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Affiliation(s)
- Abdul Elkadri
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
| | - Cornelia Thoeni
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Sophie J. Deharvengt
- Department of Pathology, Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Ryan Murchie
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Conghui Guo
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada
| | - James D. Stavropoulos
- Genome Diagnostics, Department of Paediatric Laboratory Medicine, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Christian R. Marshall
- Genome Diagnostics, Department of Paediatric Laboratory Medicine, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Paul Wales
- Group for Improvement of Intestinal Function and Treatment (GIFT), Hospital for Sick Children, Toronto, Ontario, Canada
| | - Robert H.J. Bandsma
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Ernest Cutz
- Division of Pathology, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Chaim M. Roifman
- Division of Immunology, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada
| | - David Chitayat
- Clinical and Metabolic Genetics, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Yaron Avitzur
- Group for Improvement of Intestinal Function and Treatment (GIFT), Hospital for Sick Children, Toronto, Ontario, Canada
| | - Radu V. Stan
- Department of Pathology, Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Aleixo M. Muise
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada,Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada,Correspondence Address correspondence to: Aleixo Muise, MD, PhD, 555 University Avenue, Hospital for Sick Children, Toronto, Ontario, Canada, M5G 1X8. fax: (416) 813-6531.
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13
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Trzcińska-Daneluti AM, Chen A, Nguyen L, Murchie R, Jiang C, Moffat J, Pelletier L, Rotin D. RNA Interference Screen to Identify Kinases That Suppress Rescue of ΔF508-CFTR. Mol Cell Proteomics 2015; 14:1569-83. [PMID: 25825526 DOI: 10.1074/mcp.m114.046375] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Indexed: 01/08/2023] Open
Abstract
Cystic Fibrosis (CF) is an autosomal recessive disorder caused by mutations in the gene encoding the Cystic fibrosis transmembrane conductance regulator (CFTR). ΔF508-CFTR, the most common disease-causing CF mutant, exhibits folding and trafficking defects and is retained in the endoplasmic reticulum, where it is targeted for proteasomal degradation. To identify signaling pathways involved in ΔF508-CFTR rescue, we screened a library of endoribonuclease-prepared short interfering RNAs (esiRNAs) that target ∼750 different kinases and associated signaling proteins. We identified 20 novel suppressors of ΔF508-CFTR maturation, including the FGFR1. These were subsequently validated by measuring channel activity by the YFP halide-sensitive assay following shRNA-mediated knockdown, immunoblotting for the mature (band C) ΔF508-CFTR and measuring the amount of surface ΔF508-CFTR by ELISA. The role of FGFR signaling on ΔF508-CFTR trafficking was further elucidated by knocking down FGFRs and their downstream signaling proteins: Erk1/2, Akt, PLCγ-1, and FRS2. Interestingly, inhibition of FGFR1 with SU5402 administered to intestinal organoids (mini-guts) generated from the ileum of ΔF508-CFTR homozygous mice resulted in a robust ΔF508-CFTR rescue. Moreover, combination of SU5402 and VX-809 treatments in cells led to an additive enhancement of ΔF508-CFTR rescue, suggesting these compounds operate by different mechanisms. Chaperone array analysis on human bronchial epithelial cells harvested from ΔF508/ΔF508-CFTR transplant patients treated with SU5402 identified altered expression of several chaperones, an effect validated by their overexpression or knockdown experiments. We propose that FGFR signaling regulates specific chaperones that control ΔF508-CFTR maturation, and suggest that FGFRs may serve as important targets for therapeutic intervention for the treatment of CF.
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Affiliation(s)
- Agata M Trzcińska-Daneluti
- From the ‡Program in Cell Biology, The Hospital for Sick Children, Toronto, and Biochemistry Department, University of Toronto; PGCRL, 19-9715, 686 Bay St., Toronto, Ont., Canada, M5G 0A4
| | - Anthony Chen
- From the ‡Program in Cell Biology, The Hospital for Sick Children, Toronto, and Biochemistry Department, University of Toronto; PGCRL, 19-9715, 686 Bay St., Toronto, Ont., Canada, M5G 0A4
| | - Leo Nguyen
- From the ‡Program in Cell Biology, The Hospital for Sick Children, Toronto, and Biochemistry Department, University of Toronto; PGCRL, 19-9715, 686 Bay St., Toronto, Ont., Canada, M5G 0A4
| | - Ryan Murchie
- From the ‡Program in Cell Biology, The Hospital for Sick Children, Toronto, and Biochemistry Department, University of Toronto; PGCRL, 19-9715, 686 Bay St., Toronto, Ont., Canada, M5G 0A4
| | - Chong Jiang
- From the ‡Program in Cell Biology, The Hospital for Sick Children, Toronto, and Biochemistry Department, University of Toronto; PGCRL, 19-9715, 686 Bay St., Toronto, Ont., Canada, M5G 0A4
| | | | | | - Daniela Rotin
- From the ‡Program in Cell Biology, The Hospital for Sick Children, Toronto, and Biochemistry Department, University of Toronto; PGCRL, 19-9715, 686 Bay St., Toronto, Ont., Canada, M5G 0A4
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14
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Lee CH, Hsu P, Nanan B, Nanan R, Wong M, Gaskin KJ, Leong RW, Murchie R, Muise AM, Stormon MO. Novel de novo mutations of the interleukin-10 receptor gene lead to infantile onset inflammatory bowel disease. J Crohns Colitis 2014; 8:1551-6. [PMID: 24813381 DOI: 10.1016/j.crohns.2014.04.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 04/02/2014] [Accepted: 04/13/2014] [Indexed: 02/08/2023]
Abstract
BACKGROUND AND AIMS Defects in the interleukin 10 (IL-10) signalling pathway have been shown to cause very early onset inflammatory bowel disease (IBD). We report a patient with severe infantile-onset IBD with a compound heterozygous IL-10 receptor alpha subunit (IL-10RA) mutation, one of which was paternally-inherited and the other occurring de novo. METHODS Deep sequencing of IL-10, IL-10RA and IL-10 receptor beta subunit (IL-10RB) were performed. Peripheral blood mononuclear cell (PBMC) surface expression of IL-10RA was analysed by flow cytometry. IL-10 signalling pathway was examined by measuring phosphorylated STAT3 in PBMC cultured in the presence of IL-6 or IL-10. RESULT We identified a missense mutation in exon 4 of IL-10RA (c.583T>C) in one allele and a nonsense mutation in exon 7 of IL-10RA (c.1368G>T) in the other allele. Neither mutation has been reported previously. The patient has functional IL-10RA deficiency despite normal IL-10RA expression. CONCLUSION This represents the first case report of a de novo mutation of IL-10RA that is associated with very early onset severe IBD. Therefore, IL-10 pathway defect should be considered in patients with infantile-onset IBD even if the parents are non-consanguineous.
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Affiliation(s)
- Cheng Hiang Lee
- The Children's Hospital at Westmead, Sydney, Australia; The James Fairfax Institute of Paediatric Nutrition, The University of Sydney, Australia; The Children's Hospital at Westmead Clinical School, The University of Sydney, Australia.
| | - Peter Hsu
- The Children's Hospital at Westmead, Sydney, Australia; Sydney Medical School Nepean, The University of Sydney, Australia.
| | - Brigitte Nanan
- Sydney Medical School Nepean, The University of Sydney, Australia.
| | - Ralph Nanan
- Sydney Medical School Nepean, The University of Sydney, Australia.
| | - Melanie Wong
- The Children's Hospital at Westmead, Sydney, Australia; The Children's Hospital at Westmead Clinical School, The University of Sydney, Australia.
| | - Kevin J Gaskin
- The Children's Hospital at Westmead, Sydney, Australia; The James Fairfax Institute of Paediatric Nutrition, The University of Sydney, Australia.
| | - Rupert W Leong
- Concord Repatriation General Hospital, Sydney, Australia; The University of New South Wales, Sydney, Australia.
| | - Ryan Murchie
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, and Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada.
| | - Aleixo M Muise
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, and Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada.
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15
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Persaud A, Alberts P, Mari S, Tong J, Murchie R, Maspero E, Safi F, Moran MF, Polo S, Rotin D. Tyrosine phosphorylation of NEDD4 activates its ubiquitin ligase activity. Sci Signal 2014; 7:ra95. [PMID: 25292214 DOI: 10.1126/scisignal.2005290] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Ligand binding to the receptor tyrosine kinase fibroblast growth factor (FGF) receptor 1 (FGFR1) causes dimerization and activation by transphosphorylation of tyrosine residues in the kinase domain. FGFR1 is ubiquitylated by the E3 ligase NEDD4 (also known as NEDD4-1), which promotes FGFR1 internalization and degradation. Although phosphorylation of FGFR1 is required for NEDD4-dependent endocytosis, NEDD4 directly binds to a nonphosphorylated region of FGFR1. We found that activation of FGFR1 led to activation of c-Src kinase-dependent tyrosine phosphorylation of NEDD4, enhancing the ubiquitin ligase activity of NEDD4. Using mass spectrometry, we identified several FGF-dependent phosphorylated tyrosines in NEDD4, including Tyr(43) in the C2 domain and Tyr(585) in the HECT domain. Mutating these tyrosines to phenylalanine to prevent phosphorylation inhibited FGF-dependent NEDD4 activity and FGFR1 endocytosis and enhanced cell proliferation. Mutating the tyrosines to glutamic acid to mimic phosphorylation enhanced NEDD4 activity. Moreover, the NEDD4 C2 domain bound the HECT domain, and the presence of phosphomimetic mutations inhibited this interaction, suggesting that phosphorylation of NEDD4 relieves an inhibitory intra- or intermolecular interaction. Accordingly, activation of FGFR1 was not required for activation of NEDD4 that lacked its C2 domain. Activation of c-Src by epidermal growth factor (EGF) also promoted tyrosine phosphorylation and enhanced the activity of NEDD4. Thus, we identified a feedback mechanism by which receptor tyrosine kinases promote catalytic activation of NEDD4 and that may represent a mechanism of receptor crosstalk.
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Affiliation(s)
- Avinash Persaud
- Cell Biology Program, The Hospital for Sick Children, and Biochemistry Department, University of Toronto, 686 Bay Street, Toronto, Ontario M5G 0A4, Canada
| | - Philipp Alberts
- Cell Biology Program, The Hospital for Sick Children, and Biochemistry Department, University of Toronto, 686 Bay Street, Toronto, Ontario M5G 0A4, Canada
| | - Sara Mari
- IFOM, Fondazione Istituto FIRC di Oncologia Molecolare, Via Adamello 16, Milan 20139, Italy
| | - Jiefei Tong
- Molecular Structure and Function Program, The Hospital for Sick Children, and Molecular Genetics Department, University of Toronto, Toronto, Ontario M5G 0A4, Canada
| | - Ryan Murchie
- Cell Biology Program, The Hospital for Sick Children, and Biochemistry Department, University of Toronto, 686 Bay Street, Toronto, Ontario M5G 0A4, Canada
| | - Elena Maspero
- IFOM, Fondazione Istituto FIRC di Oncologia Molecolare, Via Adamello 16, Milan 20139, Italy
| | - Frozan Safi
- Cell Biology Program, The Hospital for Sick Children, and Biochemistry Department, University of Toronto, 686 Bay Street, Toronto, Ontario M5G 0A4, Canada
| | - Michael F Moran
- Molecular Structure and Function Program, The Hospital for Sick Children, and Molecular Genetics Department, University of Toronto, Toronto, Ontario M5G 0A4, Canada
| | - Simona Polo
- IFOM, Fondazione Istituto FIRC di Oncologia Molecolare, Via Adamello 16, Milan 20139, Italy. Dipartimento Scienze della Salute, Universita degli Studi di Milano, Via di Rudini 8, Milan 20142, Italy
| | - Daniela Rotin
- Cell Biology Program, The Hospital for Sick Children, and Biochemistry Department, University of Toronto, 686 Bay Street, Toronto, Ontario M5G 0A4, Canada.
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16
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Dhillon SS, Fattouh R, Elkadri A, Xu W, Murchie R, Walters T, Guo C, Mack D, Huynh HQ, Baksh S, Silverberg MS, Griffiths AM, Snapper SB, Brumell JH, Muise AM. Variants in nicotinamide adenine dinucleotide phosphate oxidase complex components determine susceptibility to very early onset inflammatory bowel disease. Gastroenterology 2014; 147:680-689.e2. [PMID: 24931457 DOI: 10.1053/j.gastro.2014.06.005] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 05/29/2014] [Accepted: 06/03/2014] [Indexed: 12/17/2022]
Abstract
BACKGROUND & AIMS The colitis observed in patients with very early onset inflammatory bowel disease (VEOIBD; defined as onset of disease at younger than 6 years of age) often resembles that of chronic granulomatous disease (CGD) in extent and features of colonic inflammation observed by endoscopy and histology. CGD is a severe immunodeficiency caused by defects in the genes that encode components of the nicotinamide adenine dinucleotide phosphate (NADPH) oxidase complex. We investigated whether variants in genes that encode NADPH oxidase components affect susceptibility to VEOIBD using independent approaches. METHODS We performed targeted exome sequencing of genes that encode components of NADPH oxidases (cytochrome b light chain and encodes p22(phox) protein; cytochrome b-245 or NADPH oxidase 2, and encodes Nox2 or gp91(phox); neutrophil cytosol factor 1 and encodes p47 (phox) protein; neutrophil cytosol factor 2 and encodes p67 (phox) protein; neutrophil cytosol factor 4 and encodes p40 (phox) protein; and Ras-related C3 botulinum toxin substrate 1 and 2) in 122 patients with VEOIBD diagnosed at The Hospital for Sick Children, University of Toronto, from 1994 through 2012. Gene variants were validated in an independent International Early Onset Pediatric IBD Cohort Study cohort of patients with VEOIBD. In a second approach, we examined Tag single nucleotide polymorphisms in a subset of patients with VEOIBD in which the NOX2 NADPH oxidase genes sequence had been previously analyzed. We then looked for single nucleotide polymorphisms associated with the disease in an independent International Early Onset Pediatric IBD Cohort Study cohort of patients. We analyzed the functional effects of variants associated with VEOIBD. RESULTS Targeted exome sequencing and Tag single nucleotide polymorphism genotyping identified 11 variants associated with VEOIBD; the majority of patients were heterozygous for these variants. Expression of these variants in cells either reduced oxidative burst or altered interactions among proteins in the NADPH oxidase complex. Variants in the noncoding regulatory and splicing elements resulted in reduced levels of proteins, or expression of altered forms of the proteins, in blood cells from VEOIBD patients. CONCLUSIONS We found that VEOIBD patients carry heterozygous functional hypomorphic variants in components of the NOX2 NADPH oxidase complex. These do not cause overt immunodeficiency, but instead determine susceptibility to VEOIBD. Specific approaches might be developed to treat individual patients based on their genetic variant.
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Affiliation(s)
- Sandeep S Dhillon
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, The Hospital for Sick Children, Toronto, Ontario, Canada; Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
| | - Ramzi Fattouh
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Abdul Elkadri
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, The Hospital for Sick Children, Toronto, Ontario, Canada; Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada; Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Wei Xu
- Princess Margaret Hospital and Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Ryan Murchie
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Thomas Walters
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, The Hospital for Sick Children, Toronto, Ontario, Canada; Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Conghui Guo
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - David Mack
- Division of Pediatric Gastroenterology, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Hien Q Huynh
- Division of Pediatric Gastroenterology, Stollery Children's Hospital, Edmonton, Alberta, Canada
| | - Shairaz Baksh
- Division of Pediatric Gastroenterology, Stollery Children's Hospital, Edmonton, Alberta, Canada
| | - Mark S Silverberg
- Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada; Mount Sinai Hospital Inflammatory Bowel Disease Group, University of Toronto Group, Zane Cohen Center for Digestive Diseases, Toronto, Ontario, Canada
| | - Anne M Griffiths
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, The Hospital for Sick Children, Toronto, Ontario, Canada; Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Scott B Snapper
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Children's Hospital Boston; Division of Gastroenterology and Hepatology, Brigham & Women's Hospital, Department of Medicine, Harvard Medical School, Boston, Massachusetts
| | - John H Brumell
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, The Hospital for Sick Children, Toronto, Ontario, Canada; Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada; Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Aleixo M Muise
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, The Hospital for Sick Children, Toronto, Ontario, Canada; Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada; Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada.
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17
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Avitzur Y, Guo C, Mastropaolo LA, Bahrami E, Chen H, Zhao Z, Elkadri A, Dhillon S, Murchie R, Fattouh R, Huynh H, Walker JL, Wales PW, Cutz E, Kakuta Y, Dudley J, Kammermeier J, Powrie F, Shah N, Walz C, Nathrath M, Kotlarz D, Puchaka J, Krieger J, Racek T, Kirchner T, Walters TD, Brumell JH, Griffiths AM, Rezaei N, Rashtian P, Najafi M, Monajemzadeh M, Pelsue S, McGovern DPB, Uhlig HH, Schadt E, Klein C, Snapper SB, Muise AM. Mutations in tetratricopeptide repeat domain 7A result in a severe form of very early onset inflammatory bowel disease. Gastroenterology 2014; 146:1028-39. [PMID: 24417819 PMCID: PMC4002656 DOI: 10.1053/j.gastro.2014.01.015] [Citation(s) in RCA: 147] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 12/23/2013] [Accepted: 01/03/2014] [Indexed: 12/17/2022]
Abstract
BACKGROUND & AIMS Very early onset inflammatory bowel diseases (VEOIBD), including infant disorders, are a diverse group of diseases found in children younger than 6 years of age. They have been associated with several gene variants. Our aim was to identify the genes that cause VEOIBD. METHODS We performed whole exome sequencing of DNA from 1 infant with severe enterocolitis and her parents. Candidate gene mutations were validated in 40 pediatric patients and functional studies were carried out using intestinal samples and human intestinal cell lines. RESULTS We identified compound heterozygote mutations in the Tetratricopeptide repeat domain 7 (TTC7A) gene in an infant from non-consanguineous parents with severe exfoliative apoptotic enterocolitis; we also detected TTC7A mutations in 2 unrelated families, each with 2 affected siblings. TTC7A interacts with EFR3 homolog B to regulate phosphatidylinositol 4-kinase at the plasma membrane. Functional studies demonstrated that TTC7A is expressed in human enterocytes. The mutations we identified in TTC7A result in either mislocalization or reduced expression of TTC7A. Phosphatidylinositol 4-kinase was found to co-immunoprecipitate with TTC7A; the identified TTC7A mutations reduced this binding. Knockdown of TTC7A in human intestinal-like cell lines reduced their adhesion, increased apoptosis, and decreased production of phosphatidylinositol 4-phosphate. CONCLUSIONS In a genetic analysis, we identified loss of function mutations in TTC7A in 5 infants with VEOIBD. Functional studies demonstrated that the mutations cause defects in enterocytes and T cells that lead to severe apoptotic enterocolitis. Defects in the phosphatidylinositol 4-kinase-TTC7A-EFR3 homolog B pathway are involved in the pathogenesis of VEOIBD.
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Affiliation(s)
- Yaron Avitzur
- Group for Improvement of Intestinal Function and Treatment (GIFT), Hospital for Sick Children, Toronto, Ontario, Canada,SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada
| | - Conghui Guo
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Lucas A Mastropaolo
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Ehsan Bahrami
- Department of Pediatrics, Dr. von Hauner Children’s Hospital, Ludwig-Maximilians-University, Munich, Germany
| | - Hannah Chen
- Translational Gastroenterology Unit and Paediatric Gastroenterology, University of Oxford, Oxford, UK
| | - Zhen Zhao
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Abdul Elkadri
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada,Institute of Medical Science, University of Toronto, Toronto, ON, Canada
| | - Sandeep Dhillon
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Ryan Murchie
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Ramzi Fattouh
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Hien Huynh
- Division of Pediatric Gastroenterology, Stollery Children’s Hospital, Edmonton, ON, Canada
| | - Jennifer L Walker
- Department of Immunology & Molecular Biology, University of Southern Maine, Maine
| | - Paul W Wales
- Group for Improvement of Intestinal Function and Treatment (GIFT), Hospital for Sick Children, Toronto, Ontario, Canada
| | - Ernest Cutz
- Division of Pathology, The Hospital for Sick Children, Toronto, Canada
| | - Yoichi Kakuta
- F. Widjaja Foundation Inflammatory Bowel Disease Center and Immunobiology Research Institute at Cedars-Sinai Medical Center, Los Angeles
| | - Joel Dudley
- Institute for Genomics and Multiscale Biology, Department of Genetics and Genomics Sciences, Mount Sinai NY
| | | | - Fiona Powrie
- Translational Gastroenterology Unit, Nuffield Department Clinical Medicine-Experimental Medicine Division, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Neil Shah
- Gastroenterology Department, Great Ormond Street Hospital, London, UK
| | - Christoph Walz
- Institute for Pathology, Ludwig-Maximilians University, Munich, Germany
| | - Michaela Nathrath
- Department of Pediatric Oncology, Kassel and CCG Osteosarcoma, Helmholtz Center Munich, Germany
| | - Daniel Kotlarz
- Department of Pediatrics, Dr. von Hauner Children’s Hospital, Ludwig-Maximilians-University, Munich, Germany
| | - Jacek Puchaka
- Department of Pediatrics, Dr. von Hauner Children’s Hospital, Ludwig-Maximilians-University, Munich, Germany
| | - John Krieger
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Tomas Racek
- Department of Pediatrics, Dr. von Hauner Children’s Hospital, Ludwig-Maximilians-University, Munich, Germany
| | - Thomas Kirchner
- Institute for Pathology, Ludwig-Maximilians University, Munich, Germany
| | - Thomas D Walters
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada
| | - John H Brumell
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada,Institute of Medical Science, University of Toronto, Toronto, ON, Canada
| | - Anne M Griffiths
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada,Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, ON, Canada
| | - Nima Rezaei
- Research Center for Immunodeficiencies, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran,Molecular Immunology Research Center; and Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Parisa Rashtian
- Department of Pediatric Gastroenterology, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehri Najafi
- Department of Pediatric Gastroenterology, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Monajemzadeh
- Department of Pathology, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Stephen Pelsue
- Department of Immunology & Molecular Biology, University of Southern Maine, Maine
| | - Dermot PB McGovern
- F. Widjaja Foundation Inflammatory Bowel Disease Center and Immunobiology Research Institute at Cedars-Sinai Medical Center, Los Angeles
| | - Holm H Uhlig
- Translational Gastroenterology Unit and Paediatric Gastroenterology, University of Oxford, Oxford, UK
| | - Eric Schadt
- Institute for Genomics and Multiscale Biology, Department of Genetics and Genomics Sciences, Mount Sinai NY
| | - Christoph Klein
- Department of Pediatrics, Dr. von Hauner Children’s Hospital, Ludwig-Maximilians-University, Munich, Germany
| | - Scott B Snapper
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Children’s Hospital Boston; Division of Gastroenterology and Hepatology, Brigham & Women’s Hospital, Department of Medicine, Harvard Medical School, Boston, MA
| | - Aleixo M Muise
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada; Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada.
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18
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Dhillon SS, Mastropaolo LA, Murchie R, Griffiths C, Thöni C, Elkadri A, Xu W, Mack A, Walters T, Guo C, Mack D, Huynh H, Baksh S, Silverberg MS, Brumell JH, Snapper SB, Muise AM. Higher activity of the inducible nitric oxide synthase contributes to very early onset inflammatory bowel disease. Clin Transl Gastroenterol 2014; 5:e46. [PMID: 24430113 PMCID: PMC3912315 DOI: 10.1038/ctg.2013.17] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 09/18/2013] [Accepted: 11/06/2013] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVES The NOS2 gene encodes for the inducible nitric oxide synthase (iNOS), responsible for nitric oxide (NO) production, which contributes to antimicrobial and antipathogenic activities. Higher levels of both iNOS and NO-induced damage have been observed in inflammatory bowel disease (IBD) patients. NOS2 may have a role in a specific subset of IBD patients with severe and/or extensive colitis. Therefore, the aim of this study is to examine the role of NOS2 in such a subset, very early onset IBD (VEO-IBD). METHODS Seventeen tag single nucleotide polymorphisms (SNPs) in the NOS2 gene were successfully genotyped in VEO-IBD patients. Genetic associations were replicated in an independent VEO-IBD cohort. Functional analysis for iNOS activity was performed on the most significantly associated functional variant. RESULTS The NOS2 rs2297518 SNP was found to be associated in VEO-IBD in two independent cohorts. Upon combined analysis, a coding variant (S608L) showed the strongest association with VEO-IBD (Pcombined=1.13 × 10(-6), OR (odds ratio)=3.398 (95% CI (confidence interval) 2.02-5.717)) as well as associations with VEO-Crohn's disease and VEO-ulcerative colitis (UC). This variant also showed an association with UC diagnosed between 11 and 17 years of age but not with adult-onset IBD (>17 years). B-cell lymphoblastoid cell lines genotyped for the risk variant as well as Henle-407 cells transfected with a plasmid construct with the risk variant showed higher NO production. Colonic biopsies of VEO-IBD patients showed higher immunohistochemical staining of nitrotyrosine, indicating more nitrosative stress and tissue damage. CONCLUSIONS These studies suggest the importance of iNOS in genetic susceptibility to younger IBD presentation due to higher NO production.
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Affiliation(s)
- Sandeep S Dhillon
- 1] SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada [2] Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
| | - Lucas A Mastropaolo
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Ryan Murchie
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Christopher Griffiths
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Cornelia Thöni
- 1] SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada [2] Division of Cell Biology, Biocenter Innsbruck, Medical University Innsbruck, Innsbruck, Austria
| | - Abdul Elkadri
- 1] SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada [2] Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada [3] Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Wei Xu
- Princess Margaret Hospital and Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Amanda Mack
- Division of Pediatric Gastroenterology, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Thomas Walters
- 1] SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada [2] Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Conghui Guo
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada
| | - David Mack
- Division of Pediatric Gastroenterology, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Hien Huynh
- Division of Pediatric Gastroenterology, Stollery Children's Hospital, Edmonton, Alberta, Canada
| | - Shairaz Baksh
- Division of Pediatric Gastroenterology, Stollery Children's Hospital, Edmonton, Alberta, Canada
| | - Mark S Silverberg
- 1] Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada [2] Mount Sinai Hospital Inflammatory Bowel Disease Group, University of Toronto Group, Dr Zane Cohen Digestive Diseases Clinical Research Centre, 600 University Ave, Toronto, Ontario, Canada
| | - John H Brumell
- 1] SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada [2] Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada [3] Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Scott B Snapper
- 1] Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Children's Hospital Boston, Massachusetts, USA [2] Division of Gastroenterology and Hepatology, Brigham & Women's Hospital, Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Aleixo M Muise
- 1] SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada [2] Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada [3] Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada
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19
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Muise AM, Xu W, Guo CH, Walters TD, Wolters VM, Fattouh R, Lam GY, Hu P, Murchie R, Sherlock M, Gana JC, Russell RK, Glogauer M, Duerr RH, Cho JH, Lees CW, Satsangi J, Wilson DC, Paterson AD, Griffiths AM, Silverberg MS, Brumell JH. NADPH oxidase complex and IBD candidate gene studies: identification of a rare variant in NCF2 that results in reduced binding to RAC2. Gut 2012; 61:1028-35. [PMID: 21900546 PMCID: PMC3806486 DOI: 10.1136/gutjnl-2011-300078] [Citation(s) in RCA: 136] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE The NOX2 NADPH oxidase complex produces reactive oxygen species and plays a critical role in the killing of microbes by phagocytes. Genetic mutations in genes encoding components of the complex result in both X-linked and autosomal recessive forms of chronic granulomatous disease (CGD). Patients with CGD often develop intestinal inflammation that is histologically similar to Crohn's colitis, suggesting a common aetiology for both diseases. The aim of this study is to determine if polymorphisms in NOX2 NADPH oxidase complex genes that do not cause CGD are associated with the development of inflammatory bowel disease (IBD). METHODS Direct sequencing and candidate gene approaches were used to identify susceptibility loci in NADPH oxidase complex genes. Functional studies were carried out on identified variants. Novel findings were replicated in independent cohorts. RESULTS Sequence analysis identified a novel missense variant in the neutrophil cytosolic factor 2 (NCF2) gene that is associated with very early onset IBD (VEO-IBD) and subsequently found in 4% of patients with VEO-IBD compared with 0.2% of controls (p=1.3×10(-5), OR 23.8 (95% CI 3.9 to 142.5); Fisher exact test). This variant reduced binding of the NCF2 gene product p67(phox) to RAC2. This study found a novel genetic association of RAC2 with Crohn's disease (CD) and replicated the previously reported association of NCF4 with ileal CD. CONCLUSION These studies suggest that the rare novel p67(phox) variant results in partial inhibition of oxidase function and are associated with CD in a subgroup of patients with VEO-IBD; and suggest that components of the NADPH oxidase complex are associated with CD.
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Affiliation(s)
- Aleixo M Muise
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Paediatrics, Hospital for Sick Children, Toronto, Ontario, Canada.
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