1
|
Wen D, Hunjan M, Bardhan A, Harper N, Ogboli M, Ozoemena L, Liu L, Fine JD, Chapple I, Balacco DL, Heagerty A. Genotype-Phenotype Correlation in Junctional Epidermolysis Bullosa: Signposts to Severity. J Invest Dermatol 2023:S0022-202X(23)03205-0. [PMID: 38157931 DOI: 10.1016/j.jid.2023.11.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 10/10/2023] [Accepted: 11/09/2023] [Indexed: 01/03/2024]
Abstract
Junctional epidermolysis bullosa (JEB) is a rare autosomal recessive genodermatosis with a broad spectrum of phenotypes. Current genotype-phenotype paradigms are insufficient to accurately predict JEB subtype and characteristics from genotype, particularly for splice site variants, which account for over a fifth of disease-causing variants in JEB. This study evaluated the genetic and clinical findings from a JEB cohort, investigating genotype-phenotype correlations through bioinformatic analyses and comparison with previously reported variants. Eighteen unique variants in LAMB3, LAMA3, LAMC2, or COL17A1 were identified from 17 individuals. Seven had severe JEB, 9 had intermediate JEB, and 1 had laryngo-onycho-cutaneous syndrome. Seven variants were previously unreported. Deep phenotyping was completed for all intermediate JEB cases and demonstrated substantial variation between individuals. Splice site variants underwent analysis with SpliceAI, a state-of-the-art artificial intelligence tool, to predict resultant transcripts. Predicted functional effects included exon skipping and cryptic splice site activation, which provided potential explanations for disease severity and in most cases correlated with laminin-332 immunofluorescence. RT-PCR was performed for 1 case to investigate resultant transcripts produced from the splice site variant. This study expands the JEB genomic and phenotypic landscape. Artificial intelligence tools show potential for predicting the functional effects of splice site variants and may identify candidates for confirmatory laboratory investigation. Investigation of RNA transcripts will help to further elucidate genotype-phenotype correlations for novel variants.
Collapse
Affiliation(s)
- David Wen
- Institute of Clinical Sciences, University of Birmingham, Birmingham, United Kingdom; Adult Epidermolysis Bullosa Unit, Department of Dermatology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom; Oxford University Clinical Academic Graduate School, University of Oxford, Oxford, United Kingdom; Oxford University Hospitals NHS Foundation Trust, Oxford, United Kingdom.
| | - Manrup Hunjan
- Institute of Clinical Sciences, University of Birmingham, Birmingham, United Kingdom; Adult Epidermolysis Bullosa Unit, Department of Dermatology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom; Department of Dermatology, Walsall Manor Hospital, Walsall, United Kingdom
| | - Ajoy Bardhan
- Institute of Clinical Sciences, University of Birmingham, Birmingham, United Kingdom; Adult Epidermolysis Bullosa Unit, Department of Dermatology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
| | - Natasha Harper
- Adult Epidermolysis Bullosa Unit, Department of Dermatology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
| | - Malobi Ogboli
- Paediatric Epidermolysis Bullosa Unit, Department of Paediatric Dermatology, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, United Kingdom
| | - Linda Ozoemena
- National Diagnostic Epidermolysis Bullosa Laboratory, Synovis, St Thomas' Hospital, London, United Kingdom
| | - Lu Liu
- National Diagnostic Epidermolysis Bullosa Laboratory, Synovis, St Thomas' Hospital, London, United Kingdom
| | - Jo-David Fine
- Department of Dermatology, Vanderbilt University Medical Centre, Nashville, Tennessee, USA
| | - Iain Chapple
- Institute of Clinical Sciences, University of Birmingham, Birmingham, United Kingdom; Birmingham Dental Hospital, Birmingham Community Healthcare NHS Foundation Trust, Birmingham, United Kingdom; NIHR Birmingham Biomedical Research Centre Inflammation Research, Birmingham, United Kingdom
| | - Dario L Balacco
- Institute of Clinical Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Adrian Heagerty
- Adult Epidermolysis Bullosa Unit, Department of Dermatology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom; Institute of Inflammation and Ageing, University of Birmingham, Birmingham, United Kingdom
| |
Collapse
|
2
|
Knight. LK, McGrath J, Ozoemena L, Roberts R, Hlela C. A new heterozygous frameshift variant in keratin 10 resulting in ichthyosis hystrix in a father and daughter. JAAD Case Rep 2023; 35:22-24. [PMID: 37089757 PMCID: PMC10114500 DOI: 10.1016/j.jdcr.2023.02.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023] Open
|
3
|
Prodinger C, Chottianchaiwat S, Mellerio JE, McGrath JA, Ozoemena L, Liu L, Moore W, Laimer M, Petrof G, Martinez AE. The natural history of laryngo-onycho-cutaneous syndrome: A case series of six pediatric patients and literature review. Pediatr Dermatol 2021; 38:1094-1101. [PMID: 34514630 DOI: 10.1111/pde.14790] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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] [Indexed: 12/26/2022]
Abstract
BACKGROUND/OBJECTIVES Laryngo-onycho-cutaneous syndrome (LOC) is a rare subtype of junctional epidermolysis bullosa (JEB), featuring aberrant granulation tissue formation in the skin, larynx, and eyes. So far, three mutations including the specific (founder) mutation in exon 39 of LAMA3 (c.151dup) have been identified, but sparse data exists regarding the natural history, the genotype-phenotype correlation, and its differentiation from other JEB types. METHODS We reviewed our pediatric EB database to identify English children with clinical and genetically diagnosed LOC within the last 15 years. Their demographic, clinical, and laboratory data were examined. We searched three databases for case reports of LOC between January 1986 and November 2020 and extracted clinical and molecular details. RESULTS We identified 6 LOC patients, all female (mean age 5.4 years). Periungual hypergranulation and skin fragility were the earliest presenting signs (0-3 months), followed by laryngeal stenosis, symblepharon (mean onset 10.7 and 11.8 months, respectively), and dental abnormalities. Five children developed anemia at an average of 19.2 months. We identified 22 published studies in English with 31 cases. CONCLUSIONS This study delineates the disease course of LOC and highlights the overlap with some forms of JEB. Classical signs/symptoms including anemia appear early in life. Genetic analysis revealed three new LOC-associated variants and underscores the finding that interpretation of skin immunolabeling and molecular diagnostics can be challenging. We provide recommendations on management of this complex syndrome.
Collapse
Affiliation(s)
- Christine Prodinger
- Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | | | - Jemima E Mellerio
- St. John's Institute of Dermatology, King's College London, Guy's Hospital, London, UK
| | - John A McGrath
- St. John's Institute of Dermatology, King's College London, Guy's Hospital, London, UK
| | - Linda Ozoemena
- Viapath, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Lu Liu
- Viapath, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - William Moore
- Department of Ophthalmology, Great Ormond Street Hospital for Children, NHS Foundation Trust, London, UK
| | - Martin Laimer
- Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Gabriela Petrof
- Department of Dermatology, Great Ormond Street Hospital for Children, NHS Foundation Trust, London, UK
| | - Anna E Martinez
- Department of Dermatology, Great Ormond Street Hospital for Children, NHS Foundation Trust, London, UK
| |
Collapse
|
4
|
O'Sullivan S, Ozoemena L, Liu L, McGrath JA, Mellerio JE, Martinez AE. PLACK syndrome: the penny dropped. Clin Exp Dermatol 2020; 45:1091-1092. [PMID: 32918489 DOI: 10.1111/ced.14417] [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] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 07/26/2020] [Accepted: 07/28/2020] [Indexed: 11/27/2022]
Affiliation(s)
- S O'Sullivan
- St John's Institute of Dermatology, King's College London, Guy's Hospital, London, UK
| | - L Ozoemena
- National Diagnostic EB Laboratory, Viapath, St Thomas' Hospital, London, UK
| | - L Liu
- National Diagnostic EB Laboratory, Viapath, St Thomas' Hospital, London, UK
| | - J A McGrath
- St John's Institute of Dermatology, King's College London, Guy's Hospital, London, UK
| | - J E Mellerio
- St John's Institute of Dermatology, King's College London, Guy's Hospital, London, UK
| | - A E Martinez
- Dermatology Department, Great Ormond Street Hospital, NHS Foundation Trust, London, UK
| |
Collapse
|
5
|
Rashidghamat E, Kadiyirire T, Ayis S, Petrof G, Liu L, Pullabhatla V, Ainali C, Guy A, Aristodemou S, McMillan JR, Ozoemena L, Mee J, Pramanik R, Saxena A, Nuamah R, de Rinaldis E, Serrano S, Maurin C, Martinez-Queipo M, Lwin SM, Ilic D, Martinez A, Dazzi F, Slaper-Cortenbach I, Westinga K, Zeddies S, van den Broek M, Onoufriadis A, Mellerio JE, McGrath JA. Phase I/II open-label trial of intravenous allogeneic mesenchymal stromal cell therapy in adults with recessive dystrophic epidermolysis bullosa. J Am Acad Dermatol 2019; 83:447-454. [PMID: 31786163 DOI: 10.1016/j.jaad.2019.11.038] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 09/30/2019] [Accepted: 11/03/2019] [Indexed: 11/30/2022]
Abstract
BACKGROUND Recessive dystrophic epidermolysis bullosa (RDEB) is a hereditary blistering disorder due to a lack of type VII collagen. At present, treatment is mainly supportive. OBJECTIVES To determine whether intravenous allogeneic bone marrow-derived mesenchymal stromal/stem cells (BM-MSCs) are safe in RDEB adults and if the cells improve wound healing and quality of life. METHODS We conducted a prospective, phase I/II, open-label study recruiting 10 RDEB adults to receive 2 intravenous infusions of BM-MSCs (on day 0 and day 14; each dose 2-4 × 106 cells/kg). RESULTS BM-MSCs were well tolerated with no serious adverse events to 12 months. Regarding efficacy, there was a transient reduction in disease activity scores (8/10 subjects) and a significant reduction in itch. One individual showed a transient increase in type VII collagen. LIMITATIONS Open-label trial with no placebo. CONCLUSIONS MSC infusion is safe in RDEB adults and can have clinical benefits for at least 2 months.
Collapse
Affiliation(s)
- Ellie Rashidghamat
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
| | - Tendai Kadiyirire
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
| | - Salma Ayis
- School of Population Health and Environmental Sciences, King's College London, London, UK
| | - Gabriela Petrof
- Department of Dermatology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Lu Liu
- The Robin Eady National Diagnostic Epidermolysis Bullosa Laboratory, Viapath, Guy's Hospital, London, UK
| | - Venu Pullabhatla
- UK NIHR GSTFT/KCL Comprehensive Biomedical Research Centre, Guy's & St Thomas' NHS Foundation Trust, London, UK
| | - Chrysanthi Ainali
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK; Dignosis Ltd, London, UK
| | - Alyson Guy
- The Robin Eady National Diagnostic Epidermolysis Bullosa Laboratory, Viapath, Guy's Hospital, London, UK
| | - Sophia Aristodemou
- The Robin Eady National Diagnostic Epidermolysis Bullosa Laboratory, Viapath, Guy's Hospital, London, UK
| | - James R McMillan
- The Robin Eady National Diagnostic Epidermolysis Bullosa Laboratory, Viapath, Guy's Hospital, London, UK
| | - Linda Ozoemena
- The Robin Eady National Diagnostic Epidermolysis Bullosa Laboratory, Viapath, Guy's Hospital, London, UK
| | - John Mee
- Immunodermatology Laboratory, Viapath, St Thomas' Hospital, London, UK
| | - Rashida Pramanik
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
| | - Alka Saxena
- UK NIHR GSTFT/KCL Comprehensive Biomedical Research Centre, Guy's & St Thomas' NHS Foundation Trust, London, UK
| | - Rosamund Nuamah
- UK NIHR GSTFT/KCL Comprehensive Biomedical Research Centre, Guy's & St Thomas' NHS Foundation Trust, London, UK
| | | | - Sonia Serrano
- Clinical Trial Management Research Platform, NIHR Biomedical Research Centre, Guy's & St Thomas' NHS Foundation Trust, London, UK
| | - Clarisse Maurin
- Clinical Trial Management Research Platform, NIHR Biomedical Research Centre, Guy's & St Thomas' NHS Foundation Trust, London, UK
| | - Magdalena Martinez-Queipo
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
| | - Su M Lwin
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
| | - Dusko Ilic
- Stem Cell Laboratories, Guy's Assisted Conception Unit, Department of Women & Children's Health, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Anna Martinez
- Department of Dermatology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Francesco Dazzi
- Department of Haematological Medicine, The Rayne Institute, King's College London, London, UK
| | - Ineke Slaper-Cortenbach
- Cell Therapy Facility, Department of Clinical Pharmacy, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Kasper Westinga
- Cell Therapy Facility, Department of Clinical Pharmacy, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Sabrina Zeddies
- Cell Therapy Facility, Department of Clinical Pharmacy, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Marcel van den Broek
- Cell Therapy Facility, Department of Clinical Pharmacy, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Alexandros Onoufriadis
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
| | - Jemima E Mellerio
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
| | - John A McGrath
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK.
| |
Collapse
|
6
|
Lwin SM, Syed F, Di WL, Kadiyirire T, Liu L, Guy A, Petrova A, Abdul-Wahab A, Reid F, Phillips R, Elstad M, Georgiadis C, Aristodemou S, Lovell PA, McMillan JR, Mee J, Miskinyte S, Titeux M, Ozoemena L, Pramanik R, Serrano S, Rowles R, Maurin C, Orrin E, Martinez-Queipo M, Rashidghamat E, Tziotzios C, Onoufriadis A, Chen M, Chan L, Farzaneh F, Del Rio M, Tolar J, Bauer JW, Larcher F, Antoniou MN, Hovnanian A, Thrasher AJ, Mellerio JE, Qasim W, McGrath JA. Safety and early efficacy outcomes for lentiviral fibroblast gene therapy in recessive dystrophic epidermolysis bullosa. JCI Insight 2019; 4:126243. [PMID: 31167965 DOI: 10.1172/jci.insight.126243] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 04/17/2019] [Indexed: 11/17/2022] Open
Abstract
BACKGROUNDRecessive dystrophic epidermolysis bullosa (RDEB) is a severe form of skin fragility disorder due to mutations in COL7A1 encoding basement membrane type VII collagen (C7), the main constituent of anchoring fibrils (AFs) in skin. We developed a self-inactivating lentiviral platform encoding a codon-optimized COL7A1 cDNA under the control of a human phosphoglycerate kinase promoter for phase I evaluation.METHODSIn this single-center, open-label phase I trial, 4 adults with RDEB each received 3 intradermal injections (~1 × 106 cells/cm2 of intact skin) of COL7A1-modified autologous fibroblasts and were followed up for 12 months. The primary outcome was safety, including autoimmune reactions against recombinant C7. Secondary outcomes included C7 expression, AF morphology, and presence of transgene in the injected skin.RESULTSGene-modified fibroblasts were well tolerated, without serious adverse reactions or autoimmune reactions against recombinant C7. Regarding efficacy, there was a significant (P < 0.05) 1.26-fold to 26.10-fold increase in C7 mean fluorescence intensity in the injected skin compared with noninjected skin in 3 of 4 subjects, with a sustained increase up to 12 months in 2 of 4 subjects. The presence of transgene (codon-optimized COL7A1 cDNA) was demonstrated in the injected skin at month 12 in 1 subject, but no new mature AFs were detected.CONCLUSIONTo our knowledge, this is the first human study demonstrating safety and potential efficacy of lentiviral fibroblast gene therapy with the presence of COL7A1 transgene and subsequent C7 restoration in vivo in treated skin at 1 year after gene therapy. These data provide a rationale for phase II studies for further clinical evaluation.TRIAL REGISTRATIONClincalTrials.gov NCT02493816.FUNDINGCure EB, Dystrophic Epidermolysis Bullosa Research Association (UK), UK NIHR Biomedical Research Centre at Guy's and St Thomas' NHS Foundation Trust and King's College London, and Fondation René Touraine Short-Exchange Award.
Collapse
Affiliation(s)
- Su M Lwin
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, United Kingdom
| | - Farhatullah Syed
- Infection, Immunity and Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Wei-Li Di
- Infection, Immunity and Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Tendai Kadiyirire
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, United Kingdom
| | - Lu Liu
- The Robin Eady National Diagnostic Epidermolysis Bullosa Laboratory, Viapath, St Thomas' Hospital, London, United Kingdom
| | - Alyson Guy
- The Robin Eady National Diagnostic Epidermolysis Bullosa Laboratory, Viapath, St Thomas' Hospital, London, United Kingdom
| | - Anastasia Petrova
- Infection, Immunity and Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Alya Abdul-Wahab
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, United Kingdom
| | - Fiona Reid
- School of Population Health and Environmental Sciences, King's College London, London, United Kingdom
| | - Rachel Phillips
- School of Population Health and Environmental Sciences, King's College London, London, United Kingdom
| | - Maria Elstad
- School of Population Health and Environmental Sciences, King's College London, London, United Kingdom
| | - Christos Georgiadis
- Infection, Immunity and Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Sophia Aristodemou
- The Robin Eady National Diagnostic Epidermolysis Bullosa Laboratory, Viapath, St Thomas' Hospital, London, United Kingdom
| | - Patricia A Lovell
- The Robin Eady National Diagnostic Epidermolysis Bullosa Laboratory, Viapath, St Thomas' Hospital, London, United Kingdom
| | - James R McMillan
- The Robin Eady National Diagnostic Epidermolysis Bullosa Laboratory, Viapath, St Thomas' Hospital, London, United Kingdom
| | - John Mee
- Immunodermatology Laboratory, Viapath, St Thomas' Hospital, London, United Kingdom
| | - Snaigune Miskinyte
- INSERM UMR 1163, Imagine Institute, Université Paris Descartes Sorbonne Cite, Paris, France
| | - Matthias Titeux
- INSERM UMR 1163, Imagine Institute, Université Paris Descartes Sorbonne Cite, Paris, France
| | - Linda Ozoemena
- The Robin Eady National Diagnostic Epidermolysis Bullosa Laboratory, Viapath, St Thomas' Hospital, London, United Kingdom
| | - Rashida Pramanik
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, United Kingdom
| | - Sonia Serrano
- National Institute for Health Research (NIHR) Biomedical Research Centre, Guy's and St Thomas' Hospitals, London, United Kingdom
| | - Racheal Rowles
- National Institute for Health Research (NIHR) Biomedical Research Centre, Guy's and St Thomas' Hospitals, London, United Kingdom
| | - Clarisse Maurin
- National Institute for Health Research (NIHR) Biomedical Research Centre, Guy's and St Thomas' Hospitals, London, United Kingdom
| | - Elizabeth Orrin
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, United Kingdom
| | - Magdalena Martinez-Queipo
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, United Kingdom.,National Institute for Health Research (NIHR) Biomedical Research Centre, Guy's and St Thomas' Hospitals, London, United Kingdom
| | - Ellie Rashidghamat
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, United Kingdom
| | - Christos Tziotzios
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, United Kingdom
| | - Alexandros Onoufriadis
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, United Kingdom
| | - Mei Chen
- Department of Dermatology, University of Southern California, Los Angeles, California, USA
| | - Lucas Chan
- Department of Haematological Medicine, King's College London, The Rayne Institute, London, United Kingdom
| | - Farzin Farzaneh
- Department of Haematological Medicine, King's College London, The Rayne Institute, London, United Kingdom
| | - Marcela Del Rio
- Epithelial Biomedicine Division, Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT); Department of Biomedical Engineering, Carlos III University (UC3M); Instituto de Investigación Sanitaria de la Fundación Jiménez Díaz; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) U714, Madrid, Spain
| | - Jakub Tolar
- Department of Pediatric Oncology, Hematology and Bone Marrow Transplant, University of Minnesota, Minneapolis, Minnesota, USA
| | - Johann W Bauer
- Department of Dermatology and EB House Austria, University Hospital of the Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Fernando Larcher
- Epithelial Biomedicine Division, Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT); Department of Biomedical Engineering, Carlos III University (UC3M); Instituto de Investigación Sanitaria de la Fundación Jiménez Díaz; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) U714, Madrid, Spain
| | - Michael N Antoniou
- Department of Medical and Molecular Genetics, King's College London, London, United Kingdom
| | - Alain Hovnanian
- INSERM UMR 1163, Imagine Institute, Université Paris Descartes Sorbonne Cite, Paris, France
| | - Adrian J Thrasher
- Infection, Immunity and Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Jemima E Mellerio
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, United Kingdom
| | - Waseem Qasim
- Infection, Immunity and Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - John A McGrath
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, United Kingdom
| |
Collapse
|
7
|
Nanda A, Liu L, Al-Ajmi H, Al-Saleh QA, Al-Fadhli S, Anim JT, Ozoemena L, Mellerio JE, McGrath JA. Clinical subtypes and molecular basis of epidermolysis bullosa in Kuwait. Int J Dermatol 2018; 57:1058-1067. [PMID: 30011071 DOI: 10.1111/ijd.14099] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 03/15/2018] [Accepted: 06/04/2018] [Indexed: 11/28/2022]
Abstract
BACKGROUND Epidermolysis bullosa (EB) is a clinically and genetically heterogeneous blistering skin disease, but in countries such as Kuwait, there are very limited data on the clinical and molecular pathology of EB. To improve understanding of EB in Kuwait, we report the experience of a local tertiary referral center over a 17.5 year period (January 2000-June 2017) in establishing clinical and molecular diagnoses. METHODS Review of hospital records and diagnostic reports. Individual cases were diagnosed by combinations of clinical assessment, skin biopsy (immunohistochemistry and transmission electron microscopy), Sanger sequencing of EB genes, and whole exome sequencing. RESULTS Fifty-four families with EB were registered with the clinic over this period, 41 of whom (84 patients) participated in diagnostic studies. Thirty-seven of these 41 families had consanguineous marriages; 34 had recessive forms of EB, while only seven had dominant subtypes. Recurrent mutations were observed in epidermal dystonin, transglutaminase 5, and type VII collagen. CONCLUSIONS The prevalence of EB in Kuwait is approximately three times that of internationally cited rates with an over-representation of autosomal recessive variants. Establishing the molecular basis of EB in Kuwait with accurate diagnostic subtyping provides a basis for determining healthcare requirements and improving patient management of EB.
Collapse
Affiliation(s)
- Arti Nanda
- As'ad Al-Hamad Dermatology Center, Salmiya, Kuwait
| | - Lu Liu
- National Diagnostic Epidermolysis Bullosa Laboratory, Viapath, St. Thomas' Hospital, London, UK
| | | | | | - Suad Al-Fadhli
- Department of Medical Laboratory Sciences, Faculty of Allied Health Sciences, Kuwait University, Safat, Kuwait
| | - John T Anim
- Department of Pathology, Faculty of Medicine, Kuwait University, Safat, Kuwait
- Ghana College of Physicians and Surgeons, Accra, Ghana
| | - Linda Ozoemena
- National Diagnostic Epidermolysis Bullosa Laboratory, Viapath, St. Thomas' Hospital, London, UK
| | - Jemima E Mellerio
- St. John's Institute of Dermatology, King's College London, Guy's Campus, London, UK
| | - John A McGrath
- St. John's Institute of Dermatology, King's College London, Guy's Campus, London, UK
| |
Collapse
|
8
|
Vaz SO, Dâmaso C, Liu L, Ozoemena L, Mota-Vieira L. Severe phenotype of junctional epidermolysis bullosa generalised intermediate type caused by homozygous COL17A1:c.505C>T (p.Arg169*) mutation. Eur J Dermatol 2018; 28:412-413. [PMID: 29952287 DOI: 10.1684/ejd.2018.3279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Sara O Vaz
- Paediatrics Department, Hospital of Divino Espírito Santo of Ponta Delgada, EPER, Ponta Delgada, São Miguel Island, Azores, Portugal
| | - Catarina Dâmaso
- Paediatrics Department, Hospital of Divino Espírito Santo of Ponta Delgada, EPER, Ponta Delgada, São Miguel Island, Azores, Portugal
| | - Lu Liu
- The National Diagnostic EB Lab, St Thomas' Hospital, London, UK
| | - Linda Ozoemena
- The National Diagnostic EB Lab, St Thomas' Hospital, London, UK
| | - Luisa Mota-Vieira
- Molecular Genetics and Pathology Unit, Hospital of Divino Espírito Santo of Ponta Delgada, EPER, Ponta Delgada, São Miguel Island, Azores, Portugal, BioISI - Biosystems & Integrative Sciences Institute, Faculty of Sciences, University of Lisboa, Lisboa, Portugal, Instituto Gulbenkian de Ciência, Oeiras, Portugal
| |
Collapse
|
9
|
Argyropoulou Z, Liu L, Ozoemena L, Branco CC, Senra R, Reis-Rego Â, Mota-Vieira L. A novel PLEC nonsense homozygous mutation (c.7159G > T; p.Glu2387*) causes epidermolysis bullosa simplex with muscular dystrophy and diffuse alopecia: a case report. BMC Dermatol 2018; 18:1. [PMID: 29352809 PMCID: PMC5775598 DOI: 10.1186/s12895-018-0069-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 01/14/2018] [Indexed: 11/30/2022]
Abstract
Background Epidermolysis bullosa simplex with muscular dystrophy (EBS-MD; OMIM #226670) is an autosomal recessive disease, characterized mainly by skin blistering at birth or shortly thereafter, progressive muscle weakness, and rarely by alopecia. EBS-MD is caused by mutations in the PLEC gene (OMIM *601282), which encodes plectin, a structural protein expressed in several tissues, including epithelia and muscle. We describe a patient affected with EBS-MD and diffuse alopecia in which we identified a novel pathogenic mutation by PCR amplification of all coding exons and exon–intron boundaries of PLEC gene, followed by bidirectional Sanger sequencing. Case presentation The patient, a 28-year-old female and only child of consanguineous healthy parents, was born after uneventful pregnancy. At 2 days of age, she developed skin and oral mucosal blistering, accompanied by voice hoarseness. On physical examination as an adult, we observed diffuse non-scarring alopecia on the scalp, onychodystrophy (pachyonychia) in all 20 nails, dental decay, mild dysphonia, and severe muscle atrophy mainly affecting the extremities. Neurological examination showed profoundly diminished reflexes. Mutation analysis revealed the patient to be homozygous for the novel PLEC nonsense mutation − c.7159G > T (p.Glu2387*) − located in exon 31. Thismutation predicts the lack of expression of the full-length plectin isoform. Conclusion The present case appears to be the second association of EBS-MD with diffuse alopecia, both cases having different mutations involving PLEC exon 31. It remains to be elucidated whether diffuse alopecia results from PLEC mutations and/or from environmental factors.
Collapse
Affiliation(s)
- Zoe Argyropoulou
- Molecular Genetics and Pathology Unit, Hospital of Divino Espírito Santo of Ponta Delgada, EPER, Av. D. Manuel I, 9500-370, Ponta Delgada, São Miguel Island, Azores, Portugal
| | - Lu Liu
- The National Diagnostic EB Lab, St Thomas' Hospital, London, UK
| | - Linda Ozoemena
- The National Diagnostic EB Lab, St Thomas' Hospital, London, UK
| | - Claudia C Branco
- Molecular Genetics and Pathology Unit, Hospital of Divino Espírito Santo of Ponta Delgada, EPER, Av. D. Manuel I, 9500-370, Ponta Delgada, São Miguel Island, Azores, Portugal.,BioISI - Biosystems & Integrative Sciences Institute, Faculty of Sciences, University of Lisboa, Lisbon, Portugal.,Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Raquel Senra
- Internal Medicine Department, Hospital of Divino Espírito Santo of Ponta Delgada, EPER, Ponta Delgada, Azores Islands, Portugal
| | - Ângela Reis-Rego
- Internal Medicine Department, Hospital of Divino Espírito Santo of Ponta Delgada, EPER, Ponta Delgada, Azores Islands, Portugal
| | - Luisa Mota-Vieira
- Molecular Genetics and Pathology Unit, Hospital of Divino Espírito Santo of Ponta Delgada, EPER, Av. D. Manuel I, 9500-370, Ponta Delgada, São Miguel Island, Azores, Portugal. .,BioISI - Biosystems & Integrative Sciences Institute, Faculty of Sciences, University of Lisboa, Lisbon, Portugal. .,Instituto Gulbenkian de Ciência, Oeiras, Portugal.
| |
Collapse
|
10
|
Rashidghamat E, Ozoemena L, Liu L, McGrath JA, Martinez AE, Mellerio JE. Mutations in EXPH5 underlie a rare subtype of autosomal recessive epidermolysis bullosa simplex. Br J Dermatol 2015. [PMID: 26211931 DOI: 10.1111/bjd.14047] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- E Rashidghamat
- St John's Institute of Dermatology, King's College London, London, U.K
| | - L Ozoemena
- Viapath, St Thomas' Hospital, London, U.K
| | - L Liu
- Viapath, St Thomas' Hospital, London, U.K
| | - J A McGrath
- St John's Institute of Dermatology, King's College London, London, U.K
| | - A E Martinez
- Department of Dermatology, Great Ormond Street for Children NHS Foundation Trust, London, U.K
| | - J E Mellerio
- St John's Institute of Dermatology, King's College London, London, U.K.,Department of Dermatology, Great Ormond Street for Children NHS Foundation Trust, London, U.K
| |
Collapse
|
11
|
Takeichi T, Liu L, Fong K, Ozoemena L, McMillan JR, Salam A, Campbell P, Akiyama M, Mellerio JE, McLean WHI, Simpson MA, McGrath JA. Whole-exome sequencing improves mutation detection in a diagnostic epidermolysis bullosa laboratory. Br J Dermatol 2015; 172:94-100. [PMID: 24947307 DOI: 10.1111/bjd.13190] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/08/2014] [Indexed: 01/01/2023]
Abstract
BACKGROUND Subtypes of inherited epidermolysis bullosa (EB) vary significantly in their clinical presentation and prognosis. Establishing an accurate diagnosis is important for genetic counselling and patient management. Current approaches in EB diagnostics involve skin biopsy for immunohistochemistry and transmission electron microscopy, and Sanger sequencing of candidate genes. Although informative in most cases, this approach can be expensive and laborious and may fail to identify pathogenic mutations in ~15% of cases. OBJECTIVES Next-generation DNA sequencing (NGS) technologies offer a fast and efficient complementary diagnostic strategy, but the value of NGS in EB diagnostics has yet to be explored. The aim of this study was to undertake whole-exome sequencing (WES) in nine cases of EB in which established diagnostic methods failed to make a genetic diagnosis. METHODS Whole-exome capture was performed using genomic DNA from each case of EB, followed by massively parallel sequencing. Resulting reads were mapped to the human genome reference hg19. Potentially pathogenic mutations were subsequently confirmed by Sanger sequencing. RESULTS Analysis of WES data disclosed biallelic pathogenic mutations in each case, with all mutations occurring in known EB genes (LAMB3, PLEC, FERMT1 and COL7A1). This study demonstrates that NGS can improve diagnostic sensitivity in EB compared with current laboratory practice. CONCLUSIONS With appropriate diagnostic platforms and bioinformatics support, WES is likely to increase mutation detection in cases of EB and improve EB diagnostic services, although skin biopsy remains an important diagnostic investigation in current clinical practice.
Collapse
Affiliation(s)
- T Takeichi
- St John's Institute of Dermatology, King's College London (Guy's Campus), London, U.K; Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Szczecinska W, Nesteruk D, Wertheim-Tysarowska K, Greenblatt DT, Baty D, Browne F, Liu L, Ozoemena L, Terron-Kwiatkowski A, McGrath JA, Mellerio JE, Morton J, Woźniak K, Kowalewski C, Has C, Moss C. Under-recognition of acral peeling skin syndrome: 59 new cases with 15 novel mutations. Br J Dermatol 2014; 171:1206-10. [PMID: 24628291 DOI: 10.1111/bjd.12964] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/09/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND Acral peeling skin syndrome (APSS) is a rare skin fragility disorder usually caused by mutations in the transglutaminase 5 gene (TGM5). METHODS We investigated the mutation spectrum of APSS in the U.K., Germany and Poland. RESULTS We identified 59 children with APSS from 52 families. The phenotype was readily recognizable, with some variation in severity both within and between families. Most cases had been misdiagnosed as the localized form of epidermolysis bullosa simplex (EBS-loc). Eighteen different TGM5 mutations were identified, 15 of which were novel. Eight mutations were unique to a single family, nine each occurred in two families, while the common p.Gly113Cys mutation linked to a second missense variant p.Thr109Met occurred in 47 of the 52 families and was homozygous in 28. Most patients were of nonconsanguineous white European origin. CONCLUSIONS We propose that APSS is under-reported and widely misdiagnosed as EBS-loc, with significant counselling implications as APSS is autosomal recessive while EBS-loc is dominant. We recommend screening for TGM5 mutations when EBS-loc is suspected but not confirmed by mutations in KRT5 or KRT14. Our report trebles the number of known TGM5 mutations. It provides further evidence that p.Gly113Cys is a founder mutation in the European population. This is consistent with the striking ethnic distribution of APSS in U.K., where the majority of patients are of nonconsanguineous white European origin, in contrast to the pattern of other recessive skin disorders.
Collapse
Affiliation(s)
- W Szczecinska
- Department of Dermatology, Birmingham Children's Hospital, Steelhouse Lane, Birmingham, B4 6NH, U.K
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Petrof G, Nanda A, Howden J, Takeichi T, McMillan J, Aristodemou S, Ozoemena L, Liu L, South A, Pourreyron C, Dafou D, Proudfoot L, Al-Ajmi H, Akiyama M, McLean W, Simpson M, Parsons M, McGrath J. Mutations in GRHL2 result in an autosomal-recessive ectodermal Dysplasia syndrome. Am J Hum Genet 2014; 95:308-14. [PMID: 25152456 PMCID: PMC4157147 DOI: 10.1016/j.ajhg.2014.08.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Accepted: 08/01/2014] [Indexed: 01/05/2023] Open
Abstract
Grainyhead-like 2, encoded by GRHL2, is a member of a highly conserved family of transcription factors that play essential roles during epithelial development. Haploinsufficiency for GRHL2 has been implicated in autosomal-dominant deafness, but mutations have not yet been associated with any skin pathology. We investigated two unrelated Kuwaiti families in which a total of six individuals have had lifelong ectodermal defects. The clinical features comprised nail dystrophy or nail loss, marginal palmoplantar keratoderma, hypodontia, enamel hypoplasia, oral hyperpigmentation, and dysphagia. In addition, three individuals had sensorineural deafness, and three had bronchial asthma. Taken together, the features were consistent with an unusual autosomal-recessive ectodermal dysplasia syndrome. Because of consanguinity in both families, we used whole-exome sequencing to search for novel homozygous DNA variants and found GRHL2 mutations common to both families: affected subjects in one family were homozygous for c.1192T>C (p.Tyr398His) in exon 9, and subjects in the other family were homozygous for c.1445T>A (p.Ile482Lys) in exon 11. Immortalized keratinocytes (p.Ile482Lys) showed altered cell morphology, impaired tight junctions, adhesion defects, and cytoplasmic translocation of GRHL2. Whole-skin transcriptomic analysis (p.Ile482Lys) disclosed changes in genes implicated in networks of cell-cell and cell-matrix adhesion. Our clinical findings of an autosomal-recessive ectodermal dysplasia syndrome provide insight into the role of GRHL2 in skin development, homeostasis, and human disease.
Collapse
|
14
|
Pratsou P, Defty CL, Ozoemena L, McGrath JA, Moss C, Gach JE. Limited ectrodactyly, ectodermal dysplasia and cleft lip-palate syndrome with a p63 mutation, associated with linear and whorled naevoid hypermelanosis. Clin Exp Dermatol 2014; 39:266-8. [PMID: 24460914 DOI: 10.1111/ced.12259] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/13/2013] [Indexed: 11/26/2022]
Affiliation(s)
- P Pratsou
- Department of Dermatology, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
| | | | | | | | | | | |
Collapse
|
15
|
Barzegar M, Mozafari N, Kariminejad A, Asadikani Z, Ozoemena L, McGrath J. A new homozygous nonsense mutation inLAMA3Aunderlying laryngo-onycho-cutaneous syndrome. Br J Dermatol 2013; 169:1353-6. [DOI: 10.1111/bjd.12522] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/13/2013] [Indexed: 11/30/2022]
Affiliation(s)
- M. Barzegar
- Skin Research Center; Shahid Beheshti University of Medical Sciences; Shohad e Tajrish Hospital; Tehran Iran
| | - N. Mozafari
- Skin Research Center; Shahid Beheshti University of Medical Sciences; Shohad e Tajrish Hospital; Tehran Iran
| | - A. Kariminejad
- Kariminejad-Najmabadi Pathology and Genetics Center; no. 2, 4th St., Hasan Seyf St., Sanat Square Shahrak Gharb Tehran Iran
| | - Z. Asadikani
- Skin Research Center; Shahid Beheshti University of Medical Sciences; Shohad e Tajrish Hospital; Tehran Iran
| | - L. Ozoemena
- GSTS Pathology; St Thomas’ Hospital; London U.K
| | - J.A. McGrath
- St John's Institute of Dermatology; King's College London (Guy's Campus); London U.K
| |
Collapse
|
16
|
Takeichi T, Nanda A, Liu L, Salam A, Campbell P, Fong K, Akiyama M, Ozoemena L, Stone KL, Al-Ajmi H, Simpson MA, McGrath JA. Impact of next generation sequencing on diagnostics in a genetic skin disease clinic. Exp Dermatol 2013; 22:825-31. [DOI: 10.1111/exd.12276] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/27/2013] [Indexed: 12/13/2022]
Affiliation(s)
- Takuya Takeichi
- St John's Institute of Dermatology; King's College London; Guy's Hospital; London UK
- Department of Dermatology; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - Arti Nanda
- As'ad Al-Hamad Dermatology Center; Al-Sabah Hospital; Kuwait City Kuwait
| | - Lu Liu
- The National Diagnostic EB Laboratory GSTS Pathology St Thomas' Hospital; London UK
| | - Amr Salam
- St John's Institute of Dermatology; King's College London; Guy's Hospital; London UK
| | - Patrick Campbell
- St John's Institute of Dermatology; King's College London; Guy's Hospital; London UK
| | - Kenneth Fong
- St John's Institute of Dermatology; King's College London; Guy's Hospital; London UK
| | - Masashi Akiyama
- Department of Dermatology; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - Linda Ozoemena
- The National Diagnostic EB Laboratory GSTS Pathology St Thomas' Hospital; London UK
| | - Kristina L. Stone
- Department of Genetics and Molecular Medicine; King's College London; Guy's Hospital; London UK
| | - Hejab Al-Ajmi
- As'ad Al-Hamad Dermatology Center; Al-Sabah Hospital; Kuwait City Kuwait
| | - Michael A. Simpson
- Department of Genetics and Molecular Medicine; King's College London; Guy's Hospital; London UK
| | - John A. McGrath
- St John's Institute of Dermatology; King's College London; Guy's Hospital; London UK
| |
Collapse
|
17
|
Rodríguez FA, Gana MJ, Yubero MJ, Zillmann G, Krämer SM, Catalán J, Rubio-Astudillo J, González S, Liu L, Ozoemena L, Mellerio JE, Mellerio JM, McGrath JA, Palisson F, Conget P. Novel and recurrent COL7A1 mutations in Chilean patients with dystrophic epidermolysis bullosa. J Dermatol Sci 2011; 65:149-52. [PMID: 22209565 DOI: 10.1016/j.jdermsci.2011.11.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 10/04/2011] [Accepted: 11/16/2011] [Indexed: 10/14/2022]
|
18
|
Groves RW, Liu L, Dopping-Hepenstal PJ, Markus HS, Lovell PA, Ozoemena L, Lai-Cheong JE, Gawler J, Owaribe K, Hashimoto T, Mellerio JE, Mee JB, McGrath JA. A Homozygous Nonsense Mutation within the Dystonin Gene Coding for the Coiled-Coil Domain of the Epithelial Isoform of BPAG1 Underlies a New Subtype of Autosomal Recessive Epidermolysis Bullosa Simplex. J Invest Dermatol 2010; 130:1551-7. [DOI: 10.1038/jid.2010.19] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
19
|
Kannu P, Savarirayan R, Ozoemena L, White SM, McGrath JA. Rapp-Hodgkin ectodermal dysplasia syndrome: the clinical and molecular overlap with Hay-Wells syndrome. Am J Med Genet A 2009; 140:887-91. [PMID: 16532463 DOI: 10.1002/ajmg.a.31187] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We report on the clinical and molecular abnormalities in a 7-month-old girl and her mother with an ectodermal dysplasia disorder that most closely resembles Rapp-Hodgkin syndrome (RHS). At birth, the child had bilateral cleft palate, a narrow pinched nose, small chin, and hypoplastic nipples, and suffered from respiratory distress, feeding difficulties, and poor weight gain, although developmental progress was normal. Her mother had a cleft palate, sparse hair, high forehead, dental anomalies, a narrow nose, dysplastic nails, and reduced sweating. Sequencing of the p63 gene in genomic DNA from both individuals revealed a heterozygous frameshift mutation, 1721delC, in exon 14. This mutation has not been described previously and is the seventh report of a pathogenic p63 gene mutation in RHS. The frameshift results in changes to the tail of p63 with the addition of 90 missense amino acids downstream and a delayed termination codon that extends the protein by 21 amino acids. This mutation is predicted to disrupt the normal repressive function of the transactivation inhibitory domain leading to gain-of-function for at least two isoforms of the p63 transcription factor. The expanding p63 mutation database demonstrates that there is considerable overlap between the molecular pathology of RHS and Hay-Wells syndrome, with identical mutations in some cases, and that these two disorders may in fact be synonymous.
Collapse
Affiliation(s)
- Peter Kannu
- Genetic Health Services Victoria, Flemington Road, Parkville, Australia.
| | | | | | | | | |
Collapse
|
20
|
Liu L, Choy YS, Wessagowit V, Ozoemena L, Dopping-Hepenstal PJC, Fassihi H, McGrath JA. Single nucleotide polymorphism in a commonly utilized LAMB3 primer sequence: implications for mutation detection and haplotype analysis in junctional epidermolysis bullosa. J Dermatol Sci 2006; 44:48-51. [PMID: 16814527 DOI: 10.1016/j.jdermsci.2006.05.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2006] [Revised: 04/19/2006] [Accepted: 05/22/2006] [Indexed: 11/16/2022]
|