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Krämer S, Hillebrecht AL, Wang Y, Badea MA, Barrios JI, Danescu S, Fuentes I, Kartal D, Klausegger A, Ponce de León E, Schilke R, Yordanova I, Bloch-Zupan A, Has C. Orofacial Anomalies in Kindler Epidermolysis Bullosa. JAMA Dermatol 2024:2816026. [PMID: 38506824 PMCID: PMC10955352 DOI: 10.1001/jamadermatol.2024.0065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 01/11/2024] [Indexed: 03/21/2024]
Abstract
Importance Kindler epidermolysis bullosa is a genetic skin-blistering disease associated with recessive inherited pathogenic variants in FERMT1, which encodes kindlin-1. Severe orofacial manifestations of Kindler epidermolysis bullosa, including early oral squamous cell carcinoma, have been reported. Objective To determine whether hypoplastic pitted amelogenesis imperfecta is a feature of Kindler epidermolysis bullosa. Design, Settings, and Participants This longitudinal, 2-center cohort study was performed from 2003 to 2023 at the Epidermolysis Bullosa Centre, University of Freiburg, Germany, and the Special Care Dentistry Clinic, University of Chile in association with DEBRA Chile. Participants included a convenience sampling of all patients with a diagnosis of Kindler epidermolysis bullosa. Main Outcomes and Measures The primary outcomes were the presence of hypoplastic pitted amelogenesis imperfecta, intraoral wounds, gingivitis and periodontal disease, gingival hyperplasia, vestibular obliteration, cheilitis, angular cheilitis, chronic lip wounds, microstomia, and oral squamous cell carcinoma. Results The cohort consisted of 36 patients (15 female [42%] and 21 male [58%]; mean age at first examination, 23 years [range, 2 weeks to 70 years]) with Kindler epidermolysis bullosa. The follow-up ranged from 1 to 24 years. The enamel structure was assessed in 11 patients, all of whom presented with enamel structure abnormalities. The severity of hypoplastic pitted amelogenesis imperfecta varied from generalized to localized pitting. Additional orofacial features observed include gingivitis and periodontal disease, which was present in 90% (27 of 30 patients) of those assessed, followed by intraoral lesions (16 of 22 patients [73%]), angular cheilitis (24 of 33 patients [73%]), cheilitis (22 of 34 patients [65%]), gingival overgrowth (17 of 26 patients [65%]), microstomia (14 of 25 patients [56%]), and vestibular obliteration (8 of 16 patients [50%]). Other features included chronic lip ulcers (2 patients) and oral squamous cell carcinoma with lethal outcome (2 patients). Conclusions and Relevance These findings suggest that hypoplastic pitted amelogenesis imperfecta is a feature of Kindler epidermolysis bullosa and underscore the extent and severity of oral manifestations in Kindler epidermolysis bullosa and the need for early and sustained dental care.
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Affiliation(s)
- Susanne Krämer
- Department of Dermatology, Medical Faculty and Medical Center, University of Freiburg, Freiburg, Germany
- Special Care Dentistry Unit, Facultad de Odontologia, Universidad de Chile, Santiago, Chile
| | - Anna Lena Hillebrecht
- Department of Prosthetic Dentistry, Centre for Dental Medicine, Medical Centre, University of Freiburg, Freiburg, Germany
| | - Yao Wang
- Department of Dermatology, Medical Faculty and Medical Center, University of Freiburg, Freiburg, Germany
| | - Mihail-Alexandru Badea
- Dermatology Department, University of Medicine, Pharmacy, Science and Technology “George Emil Palade” of Targu-Mures, Targu-Mures, Romania
| | | | - Sorina Danescu
- Department of Dermatology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Ignacia Fuentes
- Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
- DEBRA Chile, Santiago, Chile
- Centro de Genética y Genómica, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - Demet Kartal
- Faculty of Medicine, Department of Dermatology and Venereology, Erciyes University, Kayseri, Turkey
| | - Alfred Klausegger
- EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Enrique Ponce de León
- Special Care Dentistry Unit, Facultad de Odontologia, Universidad de Chile, Santiago, Chile
| | - Reinhard Schilke
- Department of Conservative Dentistry, Periodontology and Preventive Dentistry, Hannover Medical School, Hannover, Germany
| | - Ivelina Yordanova
- Department of Dermatology and Venerology, Medical University Pleven, Pleven, Bulgaria
| | - Agnes Bloch-Zupan
- Université de Strasbourg, Faculté de Chirurgie Dentaire, Strasbourg, France
- Université de Strasbourg, Institut d’études Avancées, Strasbourg, France
- Hôpitaux Universitaires de Strasbourg, Pôle de Médecine et Chirurgie Bucco-dentaires, Hôpital Civil, Centre de Référence des Maladies Rares Orales et Dentaires, O-Rares, Filière Santé Maladies rares TETE COU, European Reference Network ERN CRANIO, Strasbourg, France
- Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM U1258, CNRS-UMR7104, Illkirch, France
| | - Cristina Has
- Department of Dermatology, Medical Faculty and Medical Center, University of Freiburg, Freiburg, Germany
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Hainzl S, Trattner L, Liemberger B, Bischof J, Kocher T, Ablinger M, Nyström A, Obermayer A, Klausegger A, Guttmann-Gruber C, Wally V, Bauer JW, Hofbauer JP, Koller U. Splicing Modulation via Antisense Oligonucleotides in Recessive Dystrophic Epidermolysis Bullosa. Int J Mol Sci 2024; 25:761. [PMID: 38255836 PMCID: PMC10815346 DOI: 10.3390/ijms25020761] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 12/30/2023] [Accepted: 01/03/2024] [Indexed: 01/24/2024] Open
Abstract
Antisense oligonucleotides (ASOs) represent an emerging therapeutic platform for targeting genetic diseases by influencing various aspects of (pre-)mRNA biology, such as splicing, stability, and translation. In this study, we investigated the potential of modulating the splicing pattern in recessive dystrophic epidermolysis bullosa (RDEB) patient cells carrying a frequent genomic variant (c.425A > G) that disrupts splicing in the COL7A1 gene by using short 2'-O-(2-Methoxyethyl) oligoribo-nucleotides (2'-MOE ASOs). COL7A1-encoded type VII collagen (C7) forms the anchoring fibrils within the skin that are essential for the attachment of the epidermis to the underlying dermis. As such, gene variants of COL7A1 leading to functionally impaired or absent C7 manifest in the form of extensive blistering and wounding. The severity of the disease pattern warrants the development of novel therapies for patients. The c.425A > G variant at the COL7A1 exon 3/intron 3 junction lowers the efficiency of splicing at this junction, resulting in non-functional C7 transcripts. However, we found that correct splicing still occurs, albeit at a very low level, highlighting an opportunity for intervention by modulating the splicing reaction. We therefore screened 2'-MOE ASOs that bind along the COL7A1 target region ranging from exon 3 to the intron 3/exon 4 junction for their ability to modulate splicing. We identified ASOs capable of increasing the relative levels of correctly spliced COL7A1 transcripts by RT-PCR, sqRT-PCR, and ddPCR. Furthermore, RDEB-derived skin equivalents treated with one of the most promising ASOs exhibited an increase in full-length C7 expression and its accurate deposition along the basement membrane zone (BMZ).
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Affiliation(s)
- Stefan Hainzl
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (S.H.); (L.T.); (B.L.); (J.B.); (T.K.); (M.A.); (A.K.); (C.G.-G.); (V.W.); (J.P.H.)
| | - Lisa Trattner
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (S.H.); (L.T.); (B.L.); (J.B.); (T.K.); (M.A.); (A.K.); (C.G.-G.); (V.W.); (J.P.H.)
| | - Bernadette Liemberger
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (S.H.); (L.T.); (B.L.); (J.B.); (T.K.); (M.A.); (A.K.); (C.G.-G.); (V.W.); (J.P.H.)
| | - Johannes Bischof
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (S.H.); (L.T.); (B.L.); (J.B.); (T.K.); (M.A.); (A.K.); (C.G.-G.); (V.W.); (J.P.H.)
| | - Thomas Kocher
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (S.H.); (L.T.); (B.L.); (J.B.); (T.K.); (M.A.); (A.K.); (C.G.-G.); (V.W.); (J.P.H.)
| | - Michael Ablinger
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (S.H.); (L.T.); (B.L.); (J.B.); (T.K.); (M.A.); (A.K.); (C.G.-G.); (V.W.); (J.P.H.)
| | - Alexander Nyström
- Department of Dermatology, Medical Faculty, Medical Center—University of Freiburg, 79110 Freiburg, Germany;
| | - Astrid Obermayer
- Core Facility of Electron Microscopy, Department of Environment & Biodiversity, Paris Lodron University Salzburg (PLUS Salzburg), 5020 Salzburg, Austria;
| | - Alfred Klausegger
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (S.H.); (L.T.); (B.L.); (J.B.); (T.K.); (M.A.); (A.K.); (C.G.-G.); (V.W.); (J.P.H.)
| | - Christina Guttmann-Gruber
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (S.H.); (L.T.); (B.L.); (J.B.); (T.K.); (M.A.); (A.K.); (C.G.-G.); (V.W.); (J.P.H.)
| | - Verena Wally
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (S.H.); (L.T.); (B.L.); (J.B.); (T.K.); (M.A.); (A.K.); (C.G.-G.); (V.W.); (J.P.H.)
| | - Johann W. Bauer
- Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria;
| | - Josefina Piñón Hofbauer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (S.H.); (L.T.); (B.L.); (J.B.); (T.K.); (M.A.); (A.K.); (C.G.-G.); (V.W.); (J.P.H.)
| | - Ulrich Koller
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (S.H.); (L.T.); (B.L.); (J.B.); (T.K.); (M.A.); (A.K.); (C.G.-G.); (V.W.); (J.P.H.)
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Bischof J, March OP, Liemberger B, Haas SA, Hainzl S, Petković I, Leb-Reichl V, Illmer J, Korotchenko E, Klausegger A, Hoog A, Binder HM, Garcia M, Duarte B, Strunk D, Larcher F, Reichelt J, Guttmann-Gruber C, Wally V, Hofbauer JP, Bauer JW, Cathomen T, Kocher T, Koller U. Paired nicking-mediated COL17A1 reframing for junctional epidermolysis bullosa. Mol Ther 2022; 30:2680-2692. [PMID: 35490295 PMCID: PMC9372311 DOI: 10.1016/j.ymthe.2022.04.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 04/19/2022] [Accepted: 04/27/2022] [Indexed: 11/26/2022] Open
Abstract
Junctional epidermolysis bullosa (JEB) is a debilitating hereditary skin disorder caused by mutations in genes encoding laminin-332, type XVII collagen (C17), and integrin-α6β4, which maintain stability between the dermis and epidermis. We designed patient-specific Cas9-nuclease- and -nickase-based targeting strategies for reframing a common homozygous deletion in exon 52 of COL17A1 associated with a lack of full-length C17 expression. Subsequent characterization of protein restoration, indel composition, and divergence of DNA and mRNA outcomes after treatment revealed auspicious efficiency, safety, and precision profiles for paired nicking-based COL17A1 editing. Almost 46% of treated primary JEB keratinocytes expressed reframed C17. Reframed COL17A1 transcripts predominantly featured 25- and 37-nt deletions, accounting for >42% of all edits and encoding C17 protein variants that localized accurately to the cell membrane. Furthermore, corrected cells showed accurate shedding of the extracellular 120-kDa C17 domain and improved adhesion capabilities to laminin-332 compared with untreated JEB cells. Three-dimensional (3D) skin equivalents demonstrated accurate and continuous deposition of C17 within the basal membrane zone between epidermis and dermis. Our findings constitute, for the first time, gene-editing-based correction of a COL17A1 mutation and demonstrate the superiority of proximal paired nicking strategies based on Cas9 D10A nickase over wild-type Cas9-based strategies for gene reframing in a clinical context.
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Affiliation(s)
- Johannes Bischof
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria
| | - Oliver Patrick March
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria
| | - Bernadette Liemberger
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria
| | - Simone Alexandra Haas
- Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg, Freiburg, Germany; Center for Chronic Immunodeficiency, Medical Center - University of Freiburg, Freiburg, Germany
| | - Stefan Hainzl
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria
| | - Igor Petković
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria
| | - Victoria Leb-Reichl
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria
| | - Julia Illmer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria
| | - Evgeniia Korotchenko
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria
| | - Alfred Klausegger
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria
| | - Anna Hoog
- Cell Therapy Institute, SCI-TReCS, Paracelsus Medical University, Salzburg, Austria
| | - Heide-Marie Binder
- Cell Therapy Institute, SCI-TReCS, Paracelsus Medical University, Salzburg, Austria
| | - Marta Garcia
- Epithelial Biomedicine Division, CIEMAT-CIBERER, Department of Bioengineering, UC3M, Instituto de Investigación Sanitaria de la Fundación Jiménez Díaz, 28040 Madrid, Spain
| | - Blanca Duarte
- Epithelial Biomedicine Division, CIEMAT-CIBERER, Department of Bioengineering, UC3M, Instituto de Investigación Sanitaria de la Fundación Jiménez Díaz, 28040 Madrid, Spain
| | - Dirk Strunk
- Cell Therapy Institute, SCI-TReCS, Paracelsus Medical University, Salzburg, Austria
| | - Fernando Larcher
- Epithelial Biomedicine Division, CIEMAT-CIBERER, Department of Bioengineering, UC3M, Instituto de Investigación Sanitaria de la Fundación Jiménez Díaz, 28040 Madrid, Spain
| | - Julia Reichelt
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria
| | - Christina Guttmann-Gruber
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria
| | - Verena Wally
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria
| | - Josefina Piñón Hofbauer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria
| | - Johann Wolfgang Bauer
- Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Toni Cathomen
- Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg, Freiburg, Germany; Center for Chronic Immunodeficiency, Medical Center - University of Freiburg, Freiburg, Germany; Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Thomas Kocher
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria
| | - Ulrich Koller
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria.
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Medek K, Klausegger A, Ude-Schoder K, Prodinger C, Breitenbach-Koller H, Bauer JW, Laimer M. Phenotypic alleviation in LAMB3-mutated severe junctional epidermolysis bullosa. J Eur Acad Dermatol Venereol 2022; 36:e631-e634. [PMID: 35305048 DOI: 10.1111/jdv.18091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K Medek
- Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020, Salzburg, Austria
| | - A Klausegger
- EB House Austria, University Hospital of Dermatology of the Paracelsus Medical University, 5020, Salzburg, Austria
| | - K Ude-Schoder
- EB House Austria, University Hospital of Dermatology of the Paracelsus Medical University, 5020, Salzburg, Austria
| | - C Prodinger
- Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020, Salzburg, Austria
| | | | - J W Bauer
- Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020, Salzburg, Austria
| | - M Laimer
- Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020, Salzburg, Austria
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Mayr E, Ablinger M, Lettner T, Murauer EM, Guttmann-Gruber C, Piñón Hofbauer J, Hainzl S, Kaiser M, Klausegger A, Bauer JW, Koller U, Wally V. 5'RNA Trans-Splicing Repair of COL7A1 Mutant Transcripts in Epidermolysis Bullosa. Int J Mol Sci 2022; 23:ijms23031732. [PMID: 35163654 PMCID: PMC8835740 DOI: 10.3390/ijms23031732] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 01/28/2022] [Accepted: 01/31/2022] [Indexed: 12/30/2022] Open
Abstract
Mutations within the COL7A1 gene underlie the inherited recessive subtype of the blistering skin disease dystrophic epidermolysis bullosa (RDEB). Although gene replacement approaches for genodermatoses are clinically advanced, their implementation for RDEB is challenging and requires endogenous regulation of transgene expression. Thus, we are using spliceosome-mediated RNA trans-splicing (SMaRT) to repair mutations in COL7A1 at the mRNA level. Here, we demonstrate the capability of a COL7A1-specific RNA trans-splicing molecule (RTM), initially selected using a fluorescence-based screening procedure, to accurately replace COL7A1 exons 1 to 64 in an endogenous setting. Retroviral RTM transduction into patient-derived, immortalized keratinocytes resulted in an increase in wild-type transcript and protein levels, respectively. Furthermore, we revealed accurate deposition of recovered type VII collagen protein within the basement membrane zone of expanded skin equivalents using immunofluorescence staining. In summary, we showed for the first time the potential of endogenous 5′ trans-splicing to correct pathogenic mutations within the COL7A1 gene. Therefore, we consider 5′ RNA trans-splicing a suitable tool to beneficially modulate the RDEB-phenotype, thus targeting an urgent need of this patient population.
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Affiliation(s)
- Elisabeth Mayr
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
| | - Michael Ablinger
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
| | - Thomas Lettner
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
| | - Eva M Murauer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
| | - Christina Guttmann-Gruber
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
| | - Josefina Piñón Hofbauer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
| | - Stefan Hainzl
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
| | - Manfred Kaiser
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
| | - Alfred Klausegger
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
| | - Johann W Bauer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
- Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
| | - Ulrich Koller
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
| | - Verena Wally
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
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6
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Guttmann-Gruber C, Piñón Hofbauer J, Tockner B, Reichl V, Klausegger A, Hofbauer P, Wolkersdorfer M, Tham KC, Lim SS, Common JE, Diem A, Ude-Schoder K, Hitzl W, Lagler F, Reichelt J, Bauer JW, Lang R, Laimer M. Impact of low-dose calcipotriol ointment on wound healing, pruritus and pain in patients with dystrophic epidermolysis bullosa: A randomized, double-blind, placebo-controlled trial. Orphanet J Rare Dis 2021; 16:473. [PMID: 34749770 PMCID: PMC8576995 DOI: 10.1186/s13023-021-02062-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 09/30/2021] [Indexed: 12/25/2022] Open
Abstract
Background Wound management is a critical factor when treating patients with the inherited skin fragility disease dystrophic epidermolysis bullosa (DEB). Due to genetic defects in structural proteins, skin and mucous epithelia are prone to blistering and chronic wounding upon minor trauma. Furthermore, these wounds are commonly associated with excessive pruritus and predispose to the development of life-threatening squamous cell carcinomas, underscoring the unmet need for new therapeutic options to improve wound healing in this patient cohort. Vitamin D3 is acknowledged to play an important role in wound healing by modulating different cellular processes that impact epidermal homeostasis and immune responses. In this study, we evaluate the safety and efficacy of low-dose calcipotriol, a vitamin D3 analogue, in promoting wound healing and reducing itch and pain in patients with DEB. Methods Eligible DEB patients, aged ≥ 6 years and with a known mutation in the COL7A1 gene, were recruited to a placebo-controlled, randomized, double blind, cross-over phase II monocentric clinical trial. Patients were required to have at least two wounds with a minimum size of 6 cm2 per wound. The primary objective was to evaluate efficacy of daily topical application of a 0.05 µg/g calcipotriol ointment in reducing wound size within a 4-week treatment regimen. Secondary objectives were to assess safety, as well as the impact of treatment on pruritus, pain, and bacterial wound colonization in these patients. Results Six patients completed the clinical trial and were included into the final analysis. Topical low-dose calcipotriol treatment led to a significant reduction in wound area at day 14 compared to placebo (88.4% vs. 65.5%, P < 0.05). Patients also reported a significant reduction of pruritus with calcipotriol ointment compared to placebo over the entire course of the treatment as shown by itch scores of 3.16 vs 4.83 (P < 0.05) and 1.83 vs 5.52 (P < 0.0001) at days 14 and 28, respectively. Treatment with low-dose calcipotriol did not affect serum calcium levels and improved the species richness of the wound microbiome, albeit with no statistical significance. Conclusions Our results show that topical treatment with low-dose calcipotriol can accelerate wound closure and significantly reduces itch, and can be considered a safe and readily-available option to improve local wound care in DEB patients. TrialRegistration EudraCT: 2016–001,967-35. Registered 28 June 2016, https://www.clinicaltrialsregister.eu/ctr-search/trial/2016-001967-35/AT Supplementary Information The online version contains supplementary material available at 10.1186/s13023-021-02062-2.
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Affiliation(s)
- Christina Guttmann-Gruber
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Josefina Piñón Hofbauer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Birgit Tockner
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Victoria Reichl
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Alfred Klausegger
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Peter Hofbauer
- Landesapotheke Salzburg, Department of Production, Hospital Pharmacy, Salzburg, Austria
| | - Martin Wolkersdorfer
- Landesapotheke Salzburg, Department of Production, Hospital Pharmacy, Salzburg, Austria
| | - Khek-Chian Tham
- Skin Research Institute of Singapore, A*STAR, 8A Biomedical Grove, Immunos #06-06, Singapore, Singapore
| | - Seong Soo Lim
- Skin Research Institute of Singapore, A*STAR, 8A Biomedical Grove, Immunos #06-06, Singapore, Singapore
| | - John E Common
- Skin Research Institute of Singapore, A*STAR, 8A Biomedical Grove, Immunos #06-06, Singapore, Singapore
| | - Anja Diem
- EB House Austria, Outpatient Unit, Department of Dermatology and Allergology, Paracelsus Medical University, Salzburg, Austria
| | - Katharina Ude-Schoder
- EB House Austria, Outpatient Unit, Department of Dermatology and Allergology, Paracelsus Medical University, Salzburg, Austria
| | - Wolfgang Hitzl
- Research Office Biostatistics, Paracelsus Medical University, Salzburg, Austria.,Department of Ophthalmology and Optometry, Paracelsus Medical University Salzburg, Müllner Hauptstr. 48, 5020, Salzburg, Austria.,Research Program Experimental Ophthalmology and Glaucoma Research, Paracelsus Medical University, Muellner Hauptstrasse 48, 5020, Salzburg, Austria
| | - Florian Lagler
- Institute for Inborn Errors of Metabolism and Department of Pediatrics, Paracelsus Medical University, Salzburg, Austria
| | - Julia Reichelt
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Johann W Bauer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria.,Department of Dermatology and Allergology, University Hospital Salzburg, Paracelsus Medical University, Muellner-Hauptstrasse 48, 5020, Salzburg, Austria
| | - Roland Lang
- Department of Dermatology and Allergology, University Hospital Salzburg, Paracelsus Medical University, Muellner-Hauptstrasse 48, 5020, Salzburg, Austria.
| | - Martin Laimer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria. .,Department of Dermatology and Allergology, University Hospital Salzburg, Paracelsus Medical University, Muellner-Hauptstrasse 48, 5020, Salzburg, Austria.
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Thiem A, Has C, Diem A, Klausegger A, Hamm H, Emmert S. [Wound therapy with cold atmospheric plasma in severe recessive dystrophic epidermolysis bullosa : A pilot study]. Hautarzt 2021; 73:384-390. [PMID: 34519836 DOI: 10.1007/s00105-021-04883-5] [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] [Accepted: 08/02/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Cold atmospheric pressure plasma (CAP) has antimicrobial and wound-healing properties. Patients affected by severe autosomal recessive dystrophic epidermolysis bullosa (RDEB) suffer from widespread, difficult-to-treat wounds, which require complex wound management. OBJECTIVE In a pilot project, we investigated over a period of 5 months the response and tolerability of a CAP wound therapy in a 21-year-old and a 28-year-old female patient with severe generalized RDEB and following cutaneous squamous cell cancer (cSSC) in the older patient. MATERIALS AND METHODS In both patients, diagnosis of RDEB was confirmed by molecular genetics. Individual- and patient-specific wound therapy was continued during the study period, and additionally CAP therapy with a dielectric barrier discharge (DBE) device was initiated. CAP treatment was performed for 90 s per wound and could be applied every day or every other day. Clinical evaluation included photographic documentation and regular interviews of patients and parents. RESULTS CAP-treated wounds largely demonstrated improved wound healing and signs of a reduced bacterial contamination. Furthermore, CAP proved to prevent wound chronification. When applied on a polyester mesh, it was well-tolerated on most body sites. CONCLUSION The introduction of CAP could improve the wound management of EB patients and should be evaluated in clinical studies. The effect of CAP on cSSC development should be particularly studied.
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Affiliation(s)
- Alexander Thiem
- Klinik und Poliklinik für Dermatologie und Venerologie, Universitätsmedizin Rostock, Strempelstr. 13, 18057, Rostock, Deutschland.
| | - Cristina Has
- Klinik für Dermatologie und Venerologie, Universitätsklinikum Freiburg, Freiburg, Deutschland
| | - Anja Diem
- EB-Ambulanz, Universitätsklinik für Dermatologie und Allergologie, Universitätsklinikum Salzburg, Salzburg, Österreich
| | - Alfred Klausegger
- EB-Ambulanz, Universitätsklinik für Dermatologie und Allergologie, Universitätsklinikum Salzburg, Salzburg, Österreich
| | - Henning Hamm
- Klinik und Poliklinik für Dermatologie, Venerologie und Allergologie, Universitätsklinikum Würzburg, Würzburg, Deutschland
| | - Steffen Emmert
- Klinik und Poliklinik für Dermatologie und Venerologie, Universitätsmedizin Rostock, Strempelstr. 13, 18057, Rostock, Deutschland
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Kocher T, Bischof J, Haas SA, March OP, Liemberger B, Hainzl S, Illmer J, Hoog A, Muigg K, Binder HM, Klausegger A, Strunk D, Bauer JW, Cathomen T, Koller U. A non-viral and selection-free COL7A1 HDR approach with improved safety profile for dystrophic epidermolysis bullosa. Mol Ther Nucleic Acids 2021; 25:237-250. [PMID: 34458008 PMCID: PMC8368800 DOI: 10.1016/j.omtn.2021.05.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 12/14/2020] [Accepted: 05/25/2021] [Indexed: 12/26/2022]
Abstract
Gene editing via homology-directed repair (HDR) currently comprises the best strategy to obtain perfect corrections for pathogenic mutations of monogenic diseases, such as the severe recessive dystrophic form of the blistering skin disease epidermolysis bullosa (RDEB). Limitations of this strategy, in particular low efficiencies and off-target effects, hinder progress toward clinical applications. However, the severity of RDEB necessitates the development of efficient and safe gene-editing therapies based on perfect repair. To this end, we sought to assess the corrective efficiencies following optimal Cas9 nuclease and nickase-based COL7A1-targeting strategies in combination with single- or double-stranded donor templates for HDR at the COL7A1 mutation site. We achieved HDR-mediated correction efficiencies of up to 21% and 10% in primary RDEB keratinocytes and fibroblasts, respectively, as analyzed by next-generation sequencing, leading to full-length type VII collagen restoration and accurate deposition within engineered three-dimensional (3D) skin equivalents (SEs). Extensive on- and off-target analyses confirmed that the combined treatment of paired nicking and single-stranded oligonucleotides constituted a highly efficient COL7A1-editing strategy, associated with a significantly improved safety profile. Our findings, therefore, represent a further advancement in the field of traceless genome editing for genodermatoses.
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Affiliation(s)
- Thomas Kocher
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Johannes Bischof
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Simone Alexandra Haas
- Institute for Transfusion Medicine and Gene Therapy, Medical Center – University of Freiburg, 79106 Freiburg, Germany
- Center for Chronic Immunodeficiency, Medical Center – University of Freiburg, 79106 Freiburg, Germany
| | - Oliver Patrick March
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Bernadette Liemberger
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Stefan Hainzl
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Julia Illmer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Anna Hoog
- Cell Therapy Institute, SCI-TReCS, Paracelsus Medical University, 5020 Salzburg, Austria
| | - Katharina Muigg
- Cell Therapy Institute, SCI-TReCS, Paracelsus Medical University, 5020 Salzburg, Austria
| | - Heide-Marie Binder
- Cell Therapy Institute, SCI-TReCS, Paracelsus Medical University, 5020 Salzburg, Austria
| | - Alfred Klausegger
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Dirk Strunk
- Cell Therapy Institute, SCI-TReCS, Paracelsus Medical University, 5020 Salzburg, Austria
| | - Johann Wolfgang Bauer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
- Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Toni Cathomen
- Institute for Transfusion Medicine and Gene Therapy, Medical Center – University of Freiburg, 79106 Freiburg, Germany
- Center for Chronic Immunodeficiency, Medical Center – University of Freiburg, 79106 Freiburg, Germany
- Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Ulrich Koller
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
- Corresponding author Ulrich Koller, EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Strubergasse 22, 5020 Salzburg, Austria.
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Prodinger C, Klausegger A, Bauer JW, Laimer M. Molekulare Diagnostik und Therapie der Epidermolysis bullosa. Monatsschr Kinderheilkd 2021. [DOI: 10.1007/s00112-021-01256-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
ZusammenfassungUnter Epidermolysis bullosa (EB) subsumiert man genetische Erkrankungen, die durch gesteigerte Hautfragilität mit Blasenbildung nach bereits geringen mechanischen Belastungen gekennzeichnet sind. Hochvariable kutane, extrakutane und Organmanifestationen verursachen eine signifikante Morbidität und Mortalität sowie eine hohe Krankheitslast für Betroffene und Angehörige. Obwohl derzeit nicht heilbar, eröffnen Fortschritte in der molekularen Charakterisierung pathogenetischer Prozesse, in den diagnostischen Techniken und molekularen Therapieansätzen neue Perspektiven. Neben korrektiven, potenziell kurativen Behandlungszugängen mit dem Ziel der Wiederherstellung der Funktion von Gen bzw. Protein stellen krankheitsmodifizierende Strategien eine wertvolle Ergänzung dar. Unter Letztere fallen symptomatische Therapien, die sekundär dysregulierte, den Phänotyp modulierende Entzündungskaskaden adressieren oder zielgerichtete Interventionen hinsichtlich bestimmter Symptome wie Fibrosierung, Juckreiz oder kanzerogener Zelltransformation. Molekulare Verfahren erlauben heute zudem, eine Diagnose und damit Prognose früher und präziser zu stellen, was die genetische Beratung erleichtert.Das Management von EB-Patienten ist komplex und bedarf einer Spezialexpertise und multidisziplinär akkordierten Versorgung. Entsprechende Ressourcen halten designierte Expertisezentren wie das EB-Haus Austria vor, das als Mitglied des Europäischen Referenznetzwerks für Seltene Hauterkrankungen (ERN Skin) sowohl klinische Versorgung, Grundlagen- und klinische Forschungsaktivitäten sowie Zugang zu Aus- und Weiterbildungsprogrammen für Betroffene, Betreuende und medizinisches Fachpersonal gewährleistet.
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Ablinger M, Lettner T, Friedl N, Potocki H, Palmetzhofer T, Koller U, Illmer J, Liemberger B, Hainzl S, Klausegger A, Reisenberger M, Lambert J, Van Gele M, Desmet E, Van Maelsaeke E, Wimmer M, Zauner R, Bauer JW, Wally V. Personalized Development of Antisense Oligonucleotides for Exon Skipping Restores Type XVII Collagen Expression in Junctional Epidermolysis Bullosa. Int J Mol Sci 2021; 22:3326. [PMID: 33805154 PMCID: PMC8036626 DOI: 10.3390/ijms22073326] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/17/2021] [Accepted: 03/20/2021] [Indexed: 02/06/2023] Open
Abstract
Intermediate junctional epidermolysis bullosa caused by mutations in the COL17A1 gene is characterized by the frequent development of blisters and erosions on the skin and mucous membranes. The rarity of the disease and the heterogeneity of the underlying mutations renders therapy developments challenging. However, the high number of short in-frame exons facilitates the use of antisense oligonucleotides (AON) to restore collagen 17 (C17) expression by inducing exon skipping. In a personalized approach, we designed and tested three AONs in combination with a cationic liposomal carrier for their ability to induce skipping of COL17A1 exon 7 in 2D culture and in 3D skin equivalents. We show that AON-induced exon skipping excludes the targeted exon from pre-mRNA processing, which restores the reading frame, leading to the expression of a slightly truncated protein. Furthermore, the expression and correct deposition of C17 at the dermal-epidermal junction indicates its functionality. Thus, we assume AON-mediated exon skipping to be a promising tool for the treatment of junctional epidermolysis bullosa, particularly applicable in a personalized manner for rare genotypes.
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Affiliation(s)
- Michael Ablinger
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
| | - Thomas Lettner
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
| | - Nicole Friedl
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
| | - Hannah Potocki
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
| | - Theresa Palmetzhofer
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
| | - Ulrich Koller
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
| | - Julia Illmer
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
| | - Bernadette Liemberger
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
| | - Stefan Hainzl
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
| | - Alfred Klausegger
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
| | - Manuela Reisenberger
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
- Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
| | - Jo Lambert
- Department of Dermatology, Ghent University Hospital, 9000 Ghent, Belgium; (J.L.); (M.V.G.); (E.D.); (E.V.M.)
| | - Mireille Van Gele
- Department of Dermatology, Ghent University Hospital, 9000 Ghent, Belgium; (J.L.); (M.V.G.); (E.D.); (E.V.M.)
| | - Eline Desmet
- Department of Dermatology, Ghent University Hospital, 9000 Ghent, Belgium; (J.L.); (M.V.G.); (E.D.); (E.V.M.)
| | - Els Van Maelsaeke
- Department of Dermatology, Ghent University Hospital, 9000 Ghent, Belgium; (J.L.); (M.V.G.); (E.D.); (E.V.M.)
| | - Monika Wimmer
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
| | - Roland Zauner
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
| | - Johann W. Bauer
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
- Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria
| | - Verena Wally
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (M.A.); (T.L.); (N.F.); (H.P.); (T.P.); (U.K.); (J.I.); (B.L.); (S.H.); (A.K.); (M.R.); (M.W.); (R.Z.); (J.W.B.)
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Kocher T, March OP, Bischof J, Liemberger B, Hainzl S, Klausegger A, Hoog A, Strunk D, Bauer JW, Koller U. Predictable CRISPR/Cas9-Mediated COL7A1 Reframing for Dystrophic Epidermolysis Bullosa. J Invest Dermatol 2020; 140:1985-1993.e5. [DOI: 10.1016/j.jid.2020.02.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 02/03/2020] [Accepted: 02/10/2020] [Indexed: 12/13/2022]
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Fuentes I, Guttmann-Gruber C, Tockner B, Diem A, Klausegger A, Cofré-Araneda G, Figuera O, Hidalgo Y, Morandé P, Palisson F, Rebolledo-Jaramillo B, Yubero MJ, Cho RJ, Rishel HI, Marinkovich MP, Teng JMC, Webster TG, Prisco M, Eraso LH, Piñon Hofbauer J, South AP. Cells from discarded dressings differentiate chronic from acute wounds in patients with Epidermolysis Bullosa. Sci Rep 2020; 10:15064. [PMID: 32934247 PMCID: PMC7492213 DOI: 10.1038/s41598-020-71794-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 07/22/2020] [Indexed: 02/06/2023] Open
Abstract
Impaired wound healing complicates a wide range of diseases and represents a major cost to healthcare systems. Here we describe the use of discarded wound dressings as a novel, cost effective, accessible, and non-invasive method of isolating viable human cells present at the site of skin wounds. By analyzing 133 discarded wound dressings from 51 patients with the inherited skin-blistering disease epidermolysis bullosa (EB), we show that large numbers of cells, often in excess of 100 million per day, continually infiltrate wound dressings. We show, that the method is able to differentiate chronic from acute wounds, identifying significant increases in granulocytes in chronic wounds, and we show that patients with the junctional form of EB have significantly more cells infiltrating their wounds compared with patients with recessive dystrophic EB. Finally, we identify subsets of granulocytes and T lymphocytes present in all wounds paving the way for single cell profiling of innate and adaptive immune cells with relevance to wound pathologies. In summary, our study delineates findings in EB that have potential relevance for all chronic wounds, and presents a method of cellular isolation that has wide reaching clinical application.
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Affiliation(s)
- Ignacia Fuentes
- DEBRA Chile, Francisco de Villagra 392, Ñuñoa, Santiago, Chile. .,Centro de Genética Y Genómica, Facultad de Medicina Clínica Alemana, Universidad de Desarrollo, Santiago, Chile.
| | - Christina Guttmann-Gruber
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Birgit Tockner
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Anja Diem
- EB House Austria, Outpatient Unit, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Alfred Klausegger
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | | | - Olga Figuera
- DEBRA Chile, Francisco de Villagra 392, Ñuñoa, Santiago, Chile
| | - Yessia Hidalgo
- Consorcio Regenero, Chilean Consortium for Regenerative Medicine, 7620157, Santiago, Chile.,Cells for Cells, 7620157, Santiago, Chile.,Faculty of Medicine, Universidad de Los Andes, 7620001, Santiago, Las Condes, Chile
| | - Pilar Morandé
- DEBRA Chile, Francisco de Villagra 392, Ñuñoa, Santiago, Chile
| | - Francis Palisson
- DEBRA Chile, Francisco de Villagra 392, Ñuñoa, Santiago, Chile.,Facultad de Medicina Clínica Alemana, Universidad de Desarrollo, Santiago, Chile
| | - Boris Rebolledo-Jaramillo
- Centro de Genética Y Genómica, Facultad de Medicina Clínica Alemana, Universidad de Desarrollo, Santiago, Chile
| | - María Joao Yubero
- DEBRA Chile, Francisco de Villagra 392, Ñuñoa, Santiago, Chile.,Facultad de Medicina Clínica Alemana, Universidad de Desarrollo, Santiago, Chile
| | | | - Heather I Rishel
- Dermatology Department, Stanford University School of Medicine, Stanford, CA, USA
| | - M Peter Marinkovich
- Dermatology Department, Stanford University School of Medicine, Stanford, CA, USA.,Dermatology Service, VA Medical Center, Palo Alto, CA, USA
| | - Joyce M C Teng
- Dermatology Department, Stanford University School of Medicine, Stanford, CA, USA
| | - Timothy G Webster
- Dermatology and Cutaneous Biology, Thomas Jefferson University, Bluemle Life Sciences Building, Room 406, 233 South Tenth Street, Philadelphia, PA, 19107, USA
| | - Marco Prisco
- Dermatology and Cutaneous Biology, Thomas Jefferson University, Bluemle Life Sciences Building, Room 406, 233 South Tenth Street, Philadelphia, PA, 19107, USA
| | - Luis H Eraso
- Vascular Medicine, Thomas Jefferson University, Philadelphia, PA, USA
| | - Josefina Piñon Hofbauer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Andrew P South
- Dermatology and Cutaneous Biology, Thomas Jefferson University, Bluemle Life Sciences Building, Room 406, 233 South Tenth Street, Philadelphia, PA, 19107, USA. .,Joel and Joan Center for Fibrotic Diseases Research, Thomas Jefferson University, Philadelphia, PA, USA. .,Sydney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, USA.
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13
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Hung CY, Volkmar B, Baker JD, Bauer JW, Gussoni E, Hainzl S, Klausegger A, Lorenzo J, Mihalek I, Rittinger O, Tekin M, Dallman JE, Bodamer OA. A defect in the inner kinetochore protein CENPT causes a new syndrome of severe growth failure. PLoS One 2017; 12:e0189324. [PMID: 29228025 PMCID: PMC5724856 DOI: 10.1371/journal.pone.0189324] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 11/23/2017] [Indexed: 11/18/2022] Open
Abstract
Primordial growth failure has been linked to defects in the biology of cell division and replication. The complex processes involved in microtubule spindle formation, organization and function have emerged as a dominant patho-mechanism in these conditions. The majority of reported disease genes encode for centrosome and centriole proteins, leaving kinetochore proteins by which the spindle apparatus interacts with the chromosomes largely unaccounted for. We report a novel disease gene encoding the constitutive inner kinetochore member CENPT, which is involved in kinetochore targeting and assembly, resulting in severe growth failure in two siblings of a consanguineous family. We herein present studies on the molecular and cellular mechanisms that explain how genetic mutations in this gene lead to primordial growth failure. In both, affected human cell lines and a zebrafish knock-down model of Cenpt, we observed aberrations in cell division with abnormal accumulation of micronuclei and of nuclei with increased DNA content arising from incomplete and/or irregular chromosomal segregation. Our studies underscore the critical importance of kinetochore function for overall body growth and provide new insight into the cellular mechanisms implicated in the spectrum of these severe growth disorders.
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Affiliation(s)
- Christina Y. Hung
- Division of Genetics and Genomics, Boston Children’s Hospital, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | - Barbara Volkmar
- Department of Pediatrics, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - James D. Baker
- Department of Biology, University of Miami, Coral Gables, Florida, United States of America
| | - Johann W. Bauer
- Department of Dermatology, EB House Austria, University Hospital of the Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Emanuela Gussoni
- Division of Genetics and Genomics, Boston Children’s Hospital, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | - Stefan Hainzl
- Department of Dermatology, EB House Austria, University Hospital of the Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Alfred Klausegger
- Department of Dermatology, EB House Austria, University Hospital of the Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Jose Lorenzo
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, Florida, United States of America
| | - Ivana Mihalek
- Division of Genetics and Genomics, Boston Children’s Hospital, Boston, Massachusetts, United States of America
| | - Olaf Rittinger
- Department of Pediatrics, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Mustafa Tekin
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, Florida, United States of America
| | - Julia E. Dallman
- Department of Biology, University of Miami, Coral Gables, Florida, United States of America
| | - Olaf A. Bodamer
- Division of Genetics and Genomics, Boston Children’s Hospital, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail:
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14
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Hirsch T, Rothoeft T, Teig N, Bauer JW, Pellegrini G, De Rosa L, Scaglione D, Reichelt J, Klausegger A, Kneisz D, Romano O, Secone Seconetti A, Contin R, Enzo E, Jurman I, Carulli S, Jacobsen F, Luecke T, Lehnhardt M, Fischer M, Kueckelhaus M, Quaglino D, Morgante M, Bicciato S, Bondanza S, De Luca M. Regeneration of the entire human epidermis using transgenic stem cells. Nature 2017; 551:327-332. [PMID: 29144448 PMCID: PMC6283270 DOI: 10.1038/nature24487] [Citation(s) in RCA: 443] [Impact Index Per Article: 63.3] [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] [Received: 06/19/2017] [Accepted: 10/10/2017] [Indexed: 12/24/2022]
Abstract
Junctional epidermolysis bullosa (JEB) is a severe and often lethal genetic disease caused by mutations in genes encoding the basement membrane component laminin-332. Surviving patients with JEB develop chronic wounds to the skin and mucosa, which impair their quality of life and lead to skin cancer. Here we show that autologous transgenic keratinocyte cultures regenerated an entire, fully functional epidermis on a seven-year-old child suffering from a devastating, life-threatening form of JEB. The proviral integration pattern was maintained in vivo and epidermal renewal did not cause any clonal selection. Clonal tracing showed that the human epidermis is sustained not by equipotent progenitors, but by a limited number of long-lived stem cells, detected as holoclones, that can extensively self-renew in vitro and in vivo and produce progenitors that replenish terminally differentiated keratinocytes. This study provides a blueprint that can be applied to other stem cell-mediated combined ex vivo cell and gene therapies.
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Affiliation(s)
- Tobias Hirsch
- Department of Plastic Surgery, Burn Centre, BG University Hospital Bergmannsheil - Ruhr-University Bochum, Germany
| | - Tobias Rothoeft
- Department of Neonatology and Pediatric Intensive Care, University Children’s Hospital, Ruhr University Bochum, Germany
| | - Norbert Teig
- Department of Neonatology and Pediatric Intensive Care, University Children’s Hospital, Ruhr University Bochum, Germany
| | - Johann W. Bauer
- EB House Austria and Department of Dermatology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Graziella Pellegrini
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
- Center for Regenerative Medicine “Stefano Ferrari”, Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Laura De Rosa
- Center for Regenerative Medicine “Stefano Ferrari”, Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | | | - Julia Reichelt
- EB House Austria and Department of Dermatology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Alfred Klausegger
- EB House Austria and Department of Dermatology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Daniela Kneisz
- EB House Austria and Department of Dermatology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Oriana Romano
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Alessia Secone Seconetti
- Center for Regenerative Medicine “Stefano Ferrari”, Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Roberta Contin
- Center for Regenerative Medicine “Stefano Ferrari”, Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Elena Enzo
- Center for Regenerative Medicine “Stefano Ferrari”, Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Irena Jurman
- Istituto di Genomica Applicata and Dipartimento di Scienze agroalimentari, ambientali e animali, University of Udine, Italy
| | | | - Frank Jacobsen
- Department of Plastic Surgery, Burn Centre, BG University Hospital Bergmannsheil - Ruhr-University Bochum, Germany
| | - Thomas Luecke
- Department of Neuropaediatrics, University Children’s Hospital, Ruhr University Bochum, Germany
| | - Marcus Lehnhardt
- Department of Plastic Surgery, Burn Centre, BG University Hospital Bergmannsheil - Ruhr-University Bochum, Germany
| | - Meike Fischer
- Department of Neonatology and Pediatric Intensive Care, University Children’s Hospital, Ruhr University Bochum, Germany
| | - Maximilian Kueckelhaus
- Department of Plastic Surgery, Burn Centre, BG University Hospital Bergmannsheil - Ruhr-University Bochum, Germany
| | - Daniela Quaglino
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Michele Morgante
- Istituto di Genomica Applicata and Dipartimento di Scienze agroalimentari, ambientali e animali, University of Udine, Italy
| | - Silvio Bicciato
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | | | - Michele De Luca
- Center for Regenerative Medicine “Stefano Ferrari”, Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
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15
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Kocher T, Peking P, Klausegger A, Murauer EM, Hofbauer JP, Wally V, Lettner T, Hainzl S, Ablinger M, Bauer JW, Reichelt J, Koller U. Cut and Paste: Efficient Homology-Directed Repair of a Dominant Negative KRT14 Mutation via CRISPR/Cas9 Nickases. Mol Ther 2017; 25:2585-2598. [PMID: 28888469 PMCID: PMC5675592 DOI: 10.1016/j.ymthe.2017.08.015] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 07/31/2017] [Accepted: 08/17/2017] [Indexed: 11/23/2022] Open
Abstract
With the ability to induce rapid and efficient repair of disease-causing mutations, CRISPR/Cas9 technology is ideally suited for gene therapy approaches for recessively and dominantly inherited monogenic disorders. In this study, we have corrected a causal hotspot mutation in exon 6 of the keratin 14 gene (KRT14) that results in generalized severe epidermolysis bullosa simplex (EBS-gen sev), using a double-nicking strategy targeting intron 7, followed by homology-directed repair (HDR). Co-delivery into EBS keratinocytes of a Cas9 D10A nickase (Cas9n), a predicted single guide RNA pair specific for intron 7, and a minicircle donor vector harboring the homology donor template resulted in a recombination efficiency of >30% and correction of the mutant KRT14 allele. Phenotypic correction of EBS-gen sev keratinocytes was demonstrated by immunofluorescence analysis, revealing the absence of disease-associated K14 aggregates within the cytoplasm. We achieved a promising safety profile for the CRISPR/Cas9 double-nicking approach, with no detectable off-target activity for a set of predicted off-target genes as confirmed by next generation sequencing. In conclusion, we demonstrate a highly efficient and specific gene-editing approach for KRT14, offering a causal treatment option for EBS.
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Affiliation(s)
- Thomas Kocher
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Patricia Peking
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Alfred Klausegger
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Eva Maria Murauer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Josefina Piñón Hofbauer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Verena Wally
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Thomas Lettner
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Stefan Hainzl
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Michael Ablinger
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Johann Wolfgang Bauer
- Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Julia Reichelt
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Ulrich Koller
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, 5020 Salzburg, Austria.
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16
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Prodinger C, Klausegger A, Diem A, Bauer JW, Laimer M. Laryngo-onycho-cutaneous (-like) syndrome due to mutated Plectin. J Eur Acad Dermatol Venereol 2017; 31:e373-e374. [PMID: 28213897 DOI: 10.1111/jdv.14173] [Citation(s) in RCA: 5] [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: 12/01/2022]
Affiliation(s)
- C Prodinger
- Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, Salzburg, Austria
| | - A Klausegger
- Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, Salzburg, Austria
| | - A Diem
- Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, Salzburg, Austria
| | - J W Bauer
- Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, Salzburg, Austria
| | - M Laimer
- Department of Dermatology, University Hospital of the Paracelsus Medical University Salzburg, Salzburg, Austria
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17
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Fuentes I, Campos M, Repetto G, Morandé P, Yubero MJ, Gonzalez S, Klausegger A, Schnitzhofer P, Pohla-Gubo G, Bauer J, Palisson F. Molecular epidemiology of junctional epidermolysis bullosa: discovery of novel and frequent LAMB3 mutations in Chilean patients with diagnostic significance. Br J Dermatol 2017; 176:1090-1092. [PMID: 27480391 DOI: 10.1111/bjd.14920] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- I Fuentes
- Fundación DEBRA Chile, Santiago, Chile
- Centro de Genética y Genómica, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile
| | - M Campos
- Centro de Genética y Genómica, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile
| | - G Repetto
- Centro de Genética y Genómica, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile
| | - P Morandé
- Fundación DEBRA Chile, Santiago, Chile
| | - M J Yubero
- Fundación DEBRA Chile, Santiago, Chile
- Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile
| | - S Gonzalez
- Departamento de Patología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - A Klausegger
- Department of Dermatology, EBHouse Austria, Paracelsus Medical University, Salzburg, 5020, Austria
| | - P Schnitzhofer
- Department of Dermatology, EBHouse Austria, Paracelsus Medical University, Salzburg, 5020, Austria
| | - G Pohla-Gubo
- Department of Dermatology, EBHouse Austria, Paracelsus Medical University, Salzburg, 5020, Austria
| | - J Bauer
- Department of Dermatology, EBHouse Austria, Paracelsus Medical University, Salzburg, 5020, Austria
| | - F Palisson
- Fundación DEBRA Chile, Santiago, Chile
- Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile
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18
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Breitenbach J, Gruber C, Klausegger A, Trost A, Bogner B, Reitsamer H, Bauer JW. Pseudosyndactyly - an inflammatory and fibrotic wound healing disorder in recessive dystrophic epidermolysis bullosa. J Dtsch Dermatol Ges 2016; 13:1257-66. [PMID: 26612796 DOI: 10.1111/ddg.12839] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND A genetic blistering skin disease, recessive dystrophic epidermolysis bullosa (RDEB), is marked by severe wound healing defects and finger contractures. The purpose of this investigation was to elucidate the mechanisms of impaired wound healing and pseudosyndactyly occurring in RDEB patients by studying the role of known inflammation and fibrosis markers in RDEB pseudosyndactyly tissue. PATIENTS AND METHODS We studied the expression of the fibrosis and/or inflammation markers tenascin-C, α-smooth muscle actin, transforming growth factor-β1, interleukin-1β, and interleukin-6 in scarring and nonscarring tissue from healthy donors and RDEB patients by semiquantitative real time-PCR and, where applicable, by immunoblots. Furthermore, the distribution pattern of α-smooth muscle actin and tenascin-C were assessed by immunofluorescence microscopy. RESULTS Based on mRNA and protein analysis, we found upregulation of tenascin-C, interleukin-1β, and interleukin-6 - but not of transforming growth factor-β1 - in recessive dystrophic epidermolysis bullosa scar samples taken from pseudosyndactyly hands. Unexpectedly, α-smooth muscle actin was not upregulated. CONCLUSIONS Our results confirm inflammation and fibrosis in recessive dystrophic epidermolysis bullosa, especially in scars, suggesting major roles for these processes in pseudosyndactyly. Our data therefore suggests the potential use of antiinflammatory and antifibrotic drugs in the prevention of pseudosyndactyly.
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Affiliation(s)
- Jenny Breitenbach
- Cluster Rheumatology, Balneology and Rehabilitation, Vienna, Austria
| | - Christina Gruber
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Alfred Klausegger
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Andrea Trost
- Department of Ophthalmology and Optometry, Research program for Ophthalmology and Glaucoma Research, Paracelsus Medical University, Salzburg, Austria
| | - Barbara Bogner
- Department of Ophthalmology and Optometry, Research program for Ophthalmology and Glaucoma Research, Paracelsus Medical University, Salzburg, Austria
| | - Herbert Reitsamer
- Department of Ophthalmology and Optometry, Research program for Ophthalmology and Glaucoma Research, Paracelsus Medical University, Salzburg, Austria
| | - Johann W Bauer
- Research Program for Molecular Therapy of Genodermatoses, EB House Austria, Department of Dermatology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
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19
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Breitenbach JS, Rinnerthaler M, Trost A, Weber M, Klausegger A, Gruber C, Bruckner D, Reitsamer HA, Bauer JW, Breitenbach M. Transcriptome and ultrastructural changes in dystrophic Epidermolysis bullosa resemble skin aging. Aging (Albany NY) 2016; 7:389-411. [PMID: 26143532 PMCID: PMC4505166 DOI: 10.18632/aging.100755] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The aging process of skin has been investigated recently with respect to mitochondrial function and oxidative stress. We have here observed striking phenotypic and clinical similarity between skin aging and recessive dystrophic Epidermolysis bullosa (RDEB), which is caused by recessive mutations in the gene coding for collagen VII, COL7A1. Ultrastructural changes, defects in wound healing, and inflammation markers are in part shared with aged skin. We have here compared the skin transcriptomes of young adults suffering from RDEB with that of sex‐ and age‐matched healthy probands. In parallel we have compared the skin transcriptome of healthy young adults with that of elderly healthy donors. Quite surprisingly, there was a large overlap of the two gene lists that concerned a limited number of functional protein families. Most prominent among the proteins found are a number of proteins of the cornified envelope or proteins mechanistically involved in cornification and other skin proteins. Further, the overlap list contains a large number of genes with a known role in inflammation. We are documenting some of the most prominent ultrastructural and protein changes by immunofluorescence analysis of skin sections from patients, old individuals, and healthy controls.
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Affiliation(s)
- Jenny S Breitenbach
- Department of Dermatology and EB House Austria, Paracelsus Medical University, Salzburg, Austria
| | - Mark Rinnerthaler
- Fachbereich Zellbiologie der Universität Salzburg, Salzburg, Austria
| | - Andrea Trost
- University Clinic of Ophthalmology and Optometry, Research Program for Ophthalmology and Glaucoma Research, Paracelsus Medical University, Salzburg, Austria
| | - Manuela Weber
- Fachbereich Zellbiologie der Universität Salzburg, Salzburg, Austria
| | - Alfred Klausegger
- Department of Dermatology and EB House Austria, Paracelsus Medical University, Salzburg, Austria
| | - Christina Gruber
- Department of Dermatology and EB House Austria, Paracelsus Medical University, Salzburg, Austria
| | - Daniela Bruckner
- University Clinic of Ophthalmology and Optometry, Research Program for Ophthalmology and Glaucoma Research, Paracelsus Medical University, Salzburg, Austria
| | - Herbert A Reitsamer
- University Clinic of Ophthalmology and Optometry, Research Program for Ophthalmology and Glaucoma Research, Paracelsus Medical University, Salzburg, Austria
| | - Johann W Bauer
- Department of Dermatology and EB House Austria, Paracelsus Medical University, Salzburg, Austria
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20
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Breitenbach J, Gruber C, Klausegger A, Trost A, Bogner B, Reitsamer H, Bauer JW. Pseudosyndaktylie - eine entzündliche und fibrotische Wundheilungsstörung bei rezessiver Epidermolysis bullosa dystrophica. J Dtsch Dermatol Ges 2015. [DOI: 10.1111/ddg.140_12839] [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] [Indexed: 11/27/2022]
Affiliation(s)
- Jenny Breitenbach
- Ludwig Boltzmann-Institut für Rheumatologie und Balneologie Cluster für Rheumatologie, Balneologie und Rehabilitation Wien, Österreich
| | - Christina Gruber
- Forschungsprogramm für Molekulare Therapie bei Genodermatosen; EB-Haus Austria; Universitätsklinik für Dermatologie; Universitätsklinikum der Paracelsus Medizinischen Privatuniversität; Salzburg Österreich
| | - Alfred Klausegger
- Forschungsprogramm für Molekulare Therapie bei Genodermatosen; EB-Haus Austria; Universitätsklinik für Dermatologie; Universitätsklinikum der Paracelsus Medizinischen Privatuniversität; Salzburg Österreich
| | - Andrea Trost
- Universitätsklinik für Augenheilkunde und Optometrie; Forschungsprogramm für Experimentelle Ophtalmologie und Glaukomforschung; Paracelsus Medizinische Privatuniversität; Salzburg Österreich
| | - Barbara Bogner
- Universitätsklinik für Augenheilkunde und Optometrie; Forschungsprogramm für Experimentelle Ophtalmologie und Glaukomforschung; Paracelsus Medizinische Privatuniversität; Salzburg Österreich
| | - Herbert Reitsamer
- Universitätsklinik für Augenheilkunde und Optometrie; Forschungsprogramm für Experimentelle Ophtalmologie und Glaukomforschung; Paracelsus Medizinische Privatuniversität; Salzburg Österreich
| | - Johann W. Bauer
- Forschungsprogramm für Molekulare Therapie bei Genodermatosen; EB-Haus Austria; Universitätsklinik für Dermatologie; Universitätsklinikum der Paracelsus Medizinischen Privatuniversität; Salzburg Österreich
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Koller U, Hainzl S, Kocher T, Hüttner C, Klausegger A, Gruber C, Mayr E, Wally V, Bauer JW, Murauer EM. Trans-splicing improvement by the combined application of antisense strategies. Int J Mol Sci 2015; 16:1179-91. [PMID: 25569093 PMCID: PMC4307297 DOI: 10.3390/ijms16011179] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Accepted: 12/25/2014] [Indexed: 11/16/2022] Open
Abstract
Spliceosome-mediated RNA trans-splicing has become an emergent tool for the repair of mutated pre-mRNAs in the treatment of genetic diseases. RNA trans-splicing molecules (RTMs) are designed to induce a specific trans-splicing reaction via a binding domain for a respective target pre-mRNA region. A previously established reporter-based screening system allows us to analyze the impact of various factors on the RTM trans-splicing efficiency in vitro. Using this system, we are further able to investigate the potential of antisense RNAs (AS RNAs), presuming to improve the trans-splicing efficiency of a selected RTM, specific for intron 102 of COL7A1. Mutations in the COL7A1 gene underlie the dystrophic subtype of the skin blistering disease epidermolysis bullosa (DEB). We have shown that co-transfections of the RTM and a selected AS RNA, interfering with competitive splicing elements on a COL7A1-minigene (COL7A1-MG), lead to a significant increase of the RNA trans-splicing efficiency. Thereby, accurate trans-splicing between the RTM and the COL7A1-MG is represented by the restoration of full-length green fluorescent protein GFP on mRNA and protein level. This mechanism can be crucial for the improvement of an RTM-mediated correction, especially in cases where a high trans-splicing efficiency is required.
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Affiliation(s)
- Ulrich Koller
- Department of Dermatology and EB House Austria, Paracelsus Medical University, Salzburg 5020, Austria.
| | - Stefan Hainzl
- Department of Dermatology and EB House Austria, Paracelsus Medical University, Salzburg 5020, Austria.
| | - Thomas Kocher
- Department of Dermatology and EB House Austria, Paracelsus Medical University, Salzburg 5020, Austria.
| | - Clemens Hüttner
- Department of Dermatology and EB House Austria, Paracelsus Medical University, Salzburg 5020, Austria.
| | - Alfred Klausegger
- Department of Dermatology and EB House Austria, Paracelsus Medical University, Salzburg 5020, Austria.
| | - Christina Gruber
- Department of Dermatology and EB House Austria, Paracelsus Medical University, Salzburg 5020, Austria.
| | - Elisabeth Mayr
- Department of Dermatology and EB House Austria, Paracelsus Medical University, Salzburg 5020, Austria.
| | - Verena Wally
- Department of Dermatology and EB House Austria, Paracelsus Medical University, Salzburg 5020, Austria.
| | - Johann W Bauer
- Department of Dermatology and EB House Austria, Paracelsus Medical University, Salzburg 5020, Austria.
| | - Eva M Murauer
- Department of Dermatology and EB House Austria, Paracelsus Medical University, Salzburg 5020, Austria.
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Lettner T, Lang R, Klausegger A, Hainzl S, Bauer JW, Wally V. MMP-9 and CXCL8/IL-8 are potential therapeutic targets in epidermolysis bullosa simplex. PLoS One 2013; 8:e70123. [PMID: 23894602 PMCID: PMC3716611 DOI: 10.1371/journal.pone.0070123] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 06/15/2013] [Indexed: 11/30/2022] Open
Abstract
Epidermolysis bullosa refers to a group of genodermatoses that affects the integrity of epithelial layers, phenotypically resulting in severe skin blistering. Dowling-Meara, the major subtype of epidermolysis bullosa simplex, is inherited in an autosomal dominant manner and can be caused by mutations in either the keratin-5 (K5) or the keratin-14 (K14) gene. Currently, no therapeutic approach is known, and the main objective of this study was to identify novel therapeutic targets. We used microarray analysis, semi-quantitative real-time PCR, western blot and ELISA to identify differentially regulated genes in two K14 mutant cell lines carrying the mutations K14 R125P and K14 R125H, respectively. We found kallikrein-related peptidases and matrix metalloproteinases to be upregulated. We also found elevated expression of chemokines, and we observed deregulation of the Cdc42 pathway as well as aberrant expression of cytokeratins and junction proteins. We further demonstrated, that expression of these genes is dependent on interleukin-1 β signaling. To evaluate these data in vivo we analysed the blister fluids of epidermolysis bullosa simplex patients vs. healthy controls and identified matrix metalloproteinase-9 and the chemokine CXCL8/IL-8 as potential therapeutic targets.
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Affiliation(s)
- Thomas Lettner
- Division of Experimental Dermatology and EB House Austria, Salzburg, Austria.
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23
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Bauer JW, Brandl C, Haubenreisser O, Wimmer B, Weber M, Karl T, Klausegger A, Breitenbach M, Hintner H, von der Haar T, Tuite MF, Breitenbach-Koller L. Specialized yeast ribosomes: a customized tool for selective mRNA translation. PLoS One 2013; 8:e67609. [PMID: 23861776 PMCID: PMC3704640 DOI: 10.1371/journal.pone.0067609] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Accepted: 05/25/2013] [Indexed: 11/23/2022] Open
Abstract
Evidence is now accumulating that sub-populations of ribosomes - so-called specialized ribosomes - can favour the translation of subsets of mRNAs. Here we use a large collection of diploid yeast strains, each deficient in one or other copy of the set of ribosomal protein (RP) genes, to generate eukaryotic cells carrying distinct populations of altered ‘specialized’ ribosomes. We show by comparative protein synthesis assays that different heterologous mRNA reporters based on luciferase are preferentially translated by distinct populations of specialized ribosomes. These mRNAs include reporters carrying premature termination codons (PTC) thus allowing us to identify specialized ribosomes that alter the efficiency of translation termination leading to enhanced synthesis of the wild-type protein. This finding suggests that these strains can be used to identify novel therapeutic targets in the ribosome. To explore this further we examined the translation of the mRNA encoding the extracellular matrix protein laminin β3 (LAMB3) since a LAMB3-PTC mutant is implicated in the blistering skin disease Epidermolysis bullosa (EB). This screen identified specialized ribosomes with reduced levels of RP L35B as showing enhanced synthesis of full-length LAMB3 in cells expressing the LAMB3-PTC mutant. Importantly, the RP L35B sub-population of specialized ribosomes leave both translation of a reporter luciferase carrying a different PTC and bulk mRNA translation largely unaltered.
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Affiliation(s)
- Johann W. Bauer
- Department of Cell Biology, University of Salzburg, Salzburg, Austria
- Department of Dermatology, General Hospital Salzburg/PMU, Salzburg, Austria
| | - Clemens Brandl
- Department of Cell Biology, University of Salzburg, Salzburg, Austria
| | | | - Bjoern Wimmer
- Department of Cell Biology, University of Salzburg, Salzburg, Austria
| | - Manuela Weber
- Department of Cell Biology, University of Salzburg, Salzburg, Austria
| | - Thomas Karl
- Department of Cell Biology, University of Salzburg, Salzburg, Austria
| | - Alfred Klausegger
- Department of Dermatology, General Hospital Salzburg/PMU, Salzburg, Austria
| | | | - Helmut Hintner
- Department of Cell Biology, University of Salzburg, Salzburg, Austria
- Department of Dermatology, General Hospital Salzburg/PMU, Salzburg, Austria
| | - Tobias von der Haar
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, Kent, United Kingdom
| | - Mick F. Tuite
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, Kent, United Kingdom
- * E-mail: (MFT); (LB-K)
| | - Lore Breitenbach-Koller
- Department of Cell Biology, University of Salzburg, Salzburg, Austria
- * E-mail: (MFT); (LB-K)
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Klausegger A, Wiednig M, Urban C, Lackner H, Reiter H, Bauer JW, Aberer W. Successful allogeneic cord blood transplantation in a patient with Evans syndrome leads to correction of hereditary angioedema type I as secondary effect. Bone Marrow Transplant 2012; 47:1259-61. [PMID: 22327128 DOI: 10.1038/bmt.2012.7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Shaiq PA, Klausegger A, Muzaffar F, Bauer JW, Khan MI, Khanum A, Qamar R, Raja GK. Founder mutation c.676insC in three unrelated Kindler syndrome families belonging to a particular clan from Pakistan. J Dermatol 2012; 39:640-1. [PMID: 22220914 DOI: 10.1111/j.1346-8138.2011.01464.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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26
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Shaiq PA, Klausegger A, Bauer JW, Azam M, Raja GK, Qamar R. Compound heterozygous mutations p.Q1530X and 6103delG in COL7A1 causing recessive dystrophic epidermolysis bullosa in a Pakistani family. J Dermatol 2011; 39:472-4. [PMID: 21967228 DOI: 10.1111/j.1346-8138.2011.01363.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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van den Akker PC, Jonkman MF, Rengaw T, Bruckner-Tuderman L, Has C, Bauer JW, Klausegger A, Zambruno G, Castiglia D, Mellerio JE, McGrath JA, van Essen AJ, Hofstra RMW, Swertz MA. The international dystrophic epidermolysis bullosa patient registry: an online database of dystrophic epidermolysis bullosa patients and their COL7A1 mutations. Hum Mutat 2011; 32:1100-7. [PMID: 21681854 DOI: 10.1002/humu.21551] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Accepted: 05/31/2011] [Indexed: 11/07/2022]
Abstract
Dystrophic epidermolysis bullosa (DEB) is a heritable blistering disorder that can be inherited autosomal dominantly (DDEB) or recessively (RDEB) and covers a group of several distinctive phenotypes. A large number of unique COL7A1 mutations have been shown to underlie DEB. Although general genotype-phenotype correlation rules have emerged, many exceptions to these rules exist, compromising disease diagnosing and genetic counseling. We therefore constructed the International DEB Patient Registry (http://www.deb-central.org), aimed at worldwide collection and sharing of phenotypic and genotypic information on DEB. As of May 2011, this MOLGENIS-based registry contains detailed information on 508 published and 71 unpublished patients and their 388 unique COL7A1 mutations, and includes all combinations of mutations. The current registry RDEB versus DDEB ratio of 4:1, if compared to prevalence figures, suggests underreporting of DDEB in the literature. Thirty-eight percent of mutations stored introduce a premature termination codon (PTC) and 43% an amino acid change. Submission wizards allow users to quickly and easily share novel information. This registry will be of great help in disease diagnosing and genetic counseling and will lead to novel insights, especially in the rare phenotypes of which there is often lack of understanding. Altogether, this registry will greatly benefit the DEB patients.
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Affiliation(s)
- Peter C van den Akker
- Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands.
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Koller U, Wally V, Mitchell LG, Klausegger A, Murauer EM, Mayr E, Gruber C, Hainzl S, Hintner H, Bauer JW. A novel screening system improves genetic correction by internal exon replacement. Nucleic Acids Res 2011; 39:e108. [PMID: 21685452 PMCID: PMC3167625 DOI: 10.1093/nar/gkr465] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Revised: 04/15/2011] [Accepted: 05/20/2011] [Indexed: 11/25/2022] Open
Abstract
Trans-splicing is a powerful approach to reprogram the genome. It can be used to replace 5', 3' or internal exons. The latter approach has been characterized by low efficiency, as the requirements to promote internal trans-splicing are largely uncharacterized. The trans-splicing process is induced by engineered 'RNA trans-splicing molecules' (RTMs), which target a selected pre-mRNA to be reprogrammed via two complementary binding domains. To facilitate the development of more efficient RTMs for therapeutic applications we constructed a novel fluorescence based screening system. We incorporated exon 52 of the COL17A1 gene into a GFP-based cassette system as the target exon. This exon is mutated in many patients with the devastating skin blistering disease epidermolysis bullosa. In a double transfection assay we were able to rapidly identify optimal binding domains targeted to sequences in the surrounding introns 51 and 52. The ability to replace exon 52 was then evaluated in a more endogenous context using a target containing COL17A1 exon 51-intron 51-exon 52-intron 52-exon 53. Two selected RTMs produced significantly higher levels of GFP expression in up to 61% assayed cells. This novel approach allows for rapid identification of efficient RTMs for internal exon replacement.
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Affiliation(s)
- Ulrich Koller
- Division of Molecular Dermatology and EB House Austria, Department of Dermatology, Paracelsus Medical University, 5020 Salzburg, Austria.
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Yiu EM, Klausegger A, Waddell LB, Grasern N, Lloyd L, Tran K, North KN, Bauer JW, McKelvie P, Chow C, Ryan MM, Murrell DF. Epidermolysis bullosa with late-onset muscular dystrophy and plectin deficiency. Muscle Nerve 2011; 44:135-41. [DOI: 10.1002/mus.22076] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Yiu EM, Klausegger A, Waddell L, Tran K, Chow C, North K, Murrell D, Ryan MM. 59. Epidermolysis bullosa with late-onset muscular dystrophy and plectin deficiency. J Clin Neurosci 2010. [DOI: 10.1016/j.jocn.2010.07.060] [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: 11/24/2022]
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31
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Riedl E, Klausegger A, Bauer JW, Foedinger D, Kittler H. A novel glycine mutation in the COL7A1 gene leading to dominant dystrophic epidermolysis bullosa with intra-familial phenotypical heterogeneity. Pediatr Dermatol 2009; 26:115-7. [PMID: 19250433 DOI: 10.1111/j.1525-1470.2008.00846.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dystrophic epidermolysis bullosa (DEB) represents a group of inherited skin disorders characterized by sublamina densa blister formation. We resent the case of a 16-year old girl with DEB, who had a 10-year-history of recurrent pruritic skin lesions. Despite misleading biopsy results, the correct diagnosis was suspected by examination of other family members. Finally, mutational analysis revealed a novel glycine substitution mutation in the COL7A1 gene in three affected family members.
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Affiliation(s)
- Elisabeth Riedl
- Department of Dermatology, Division of General Dermatology, Medical University of Vienna, Vienna, Austria
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Sadler E, Klausegger A, Muss W, Deinsberger U, Pohla-Gubo G, Laimer M, Lanschuetzer C, Bauer JW, Hintner H. Novel KIND1 gene mutation in Kindler syndrome with severe gastrointestinal tract involvement. ACTA ACUST UNITED AC 2007; 142:1619-24. [PMID: 17178989 DOI: 10.1001/archderm.142.12.1619] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [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: 11/14/2022]
Abstract
BACKGROUND Kindler syndrome (online Mendelian Inheritance in Man No. 173650) is an autosomal recessive genodermatosis characterized by acral trauma-induced blistering that improves with age and by progressive poikiloderma in later life. Other clinical features include photosensitivity, webbing of the fingers and toes, nail dystrophy, periodontal disease, and mucosal alterations. Aside from esophageal or anal stenosis, gastrointestinal tract involvement seems to be rare in Kindler syndrome. Recently, mutations in the KIND1 gene that encodes for the membrane-associated protein kindlin-1 have been identified. Kindlin-1 links the actin cytoskeleton to the extracellular matrix and is supposed to have cell-signaling functions owing to different functional domains. In particular, a domain with high homology to 4.1/ezrin/radixin/moesin (FERM) proteins is closely related to the sequences of talin that mediate integrin binding and therefore may play a role in integrin-dependent processes such as cell growth, differentiation, and apoptosis. OBSERVATION Complete loss of this multifunctional protein in our patient with Kindler syndrome resulted in severe gastrointestinal tract involvement with hemorrhagic colitis. Mucosa of the descending and sigmoid colon and the rectum showed erosions and ulcers with pseudomembranous alterations of an overall highly vulnerable mucosa. Mutation analysis revealed a homozygous status for the novel mutation 20/21delTT in exon 2 of the KIND1 gene resulting in a preterminal stop codon creating a nonfunctional peptide 17 amino acids in length. CONCLUSION Because of our experience with this and another patient, we propose that gastrointestinal tract involvement should be looked at more frequently in Kindler syndrome.
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Affiliation(s)
- Elke Sadler
- Department of Dermatology, Paracelsus Private Medical University of Salzburg, Salzburg, Austria
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Laimer M, Klausegger A, Aberer W, Oender K, Steinhuber M, Lanschuetzer CM, Wally V, Hintner H, Bauer JW. Haploinsufficiency due to deletion within the 3′-UTR of C1-INH-gene associated with hereditary angioedema. Genet Med 2006; 8:249-54. [PMID: 16617246 DOI: 10.1097/01.gim.0000214302.90076.fa] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [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: 11/26/2022] Open
Abstract
PURPOSE Sequences within the non-coding 3'UTR (untranslated region) of genes were reported to be involved in the regulation of gene expression by modifying pathways of (co)transcription, post-transcriptional processing and RNA transport. However, direct biological evidence (i.e., knock-out models) is sparse. This report intends to correlate the first reported alteration within the 3'UTR of the C1 inhibitor (C1-INH) gene with clinical presentation of hereditary angioedema (HAE). METHODS AND RESULTS Direct sequencing of genomic DNA revealed in all affected members of a family suffering from HAE a heterozygous 155 bp deletion 100 bp downstream of the physiological stop-codon in exon 8. A substantial reduction of both mRNA as well as C1-INH protein expression was revealed by RT-PCR and nephelometry, respectively. CONCLUSION We suppose that the mutation within the 3'UTR interferes with integral pathways of gene expression leading to pathogenic haploinsufficiency in this family.
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Affiliation(s)
- Martin Laimer
- Division of Molecular Dermatology, Department of Dermatology, Paracelsus Private Medical University Salzburg, Salzburg, Austria
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Oender K, Lanschuetzer CM, Laimer M, Klausegger A, Paulweber B, Kofler B, Hintner H, Bauer JW. Introducing a fast and simple PCR-RFLP analysis for the detection of mutant thiopurine S-methyltransferase alleles TPMT*3A and TPMT*3C. J Eur Acad Dermatol Venereol 2006; 20:396-400. [PMID: 16643135 DOI: 10.1111/j.1468-3083.2006.01459.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [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: 11/29/2022]
Abstract
BACKGROUND Azathioprine, in combination with corticosteroids, is the first-line therapy of severe forms of pemphigus vulgaris. Patients with an impaired thiopurine S-methyltransferase (TPMT) activity are at risk of developing severe myelo-suppression upon treatment with thiopurines such as azathioprine. Analysis of the TPMT status prior to drug administration is therefore highly recommended. However, because of the limited availability of TPMT testing outside of specialized centres, pre-emptive TPMT testing is not widespread. To avoid laborious biochemical and sequencing assays, we evaluated a new restriction fragment length polymorphism (RFLP) analysis. METHODS We designed a rapid genetic polymerase chain reaction (PCR)-RFLP screen for the most prevalent mutant TPMT*3A and TPMT*3C alleles that are known to result in reduced TPMT enzyme activity. RESULTS Validating our fast system on 871 Caucasian DNA samples, we observed that 8.61% of our probands carried the TPMT*3A allele and 0.23% were heterozygous for the TPMT*3C allele, which is in concordance with previously reported allele frequencies. CONCLUSION This simple and low-cost PCR-RFLP TPMT polymorphism testing approach can be performed in a standard laboratory. It should be applied to all patients prior to receiving thiopurine drug therapy to avoid the severe, but predictable, haematopoietic side-effects of thiopurine drug administration.
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Affiliation(s)
- K Oender
- Department of Dermatology, Paracelsus Private Medical University, Salzburg, Austria
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35
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Laimer M, Bauer JW, Klausegger A, Koller J, Pohla-Gubo G, Muss W, Sadler E, Emberger M, Lanschuetzer CM, Hametner R, Wally V, Oender K, Hinter H. Skin grafting as a therapeutic approach in pretibially restricted junctional epidermolysis bullosa. Br J Dermatol 2005; 154:185-7. [PMID: 16403119 DOI: 10.1111/j.1365-2133.2005.06988.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Sadler E, Laimer M, Diem A, Klausegger A, Pohla-Gubo G, Muss W, Hachleitner J, Stadlhuber R, Bauer JW, Hintner H. [Dental alterations in junctional epidermolysis bullosa--report of a patient with a mutation in the LAMB3-gene]. J Dtsch Dermatol Ges 2005; 3:359-63. [PMID: 16372803 DOI: 10.1111/j.1610-0387.2005.05703.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [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: 11/26/2022]
Abstract
During early odontogenesis the basement membrane is known to be important in epithelio-mesenchymal interactions. Mutations in the gene of one of the major structural proteins of the basement membrane such as laminin 5 might therefore be expected either to seriously compromise ameloblast differentiation and/ or interfere with normal basement-membrane formation and degradation and thus the binding of the ameloblasts to their underlying matrix. Teeth of patients suffering from junctional epidermolysis bullosa (JEB) can be severely affected by abnormal dental development and generalized or focal enamel hypoplasia. Those changes are found in 100% of individuals with JEB but the expression is variable. Beside the quantitative alterations, changes in the prismatic structure and orientation of enamel crystals are described. In addition JEB is associated with an increased risk for dental caries, caused by developmentally compromised enamel and external factors such as difficulties in maintaining oral hygiene because of oral lesions or a softer and more refined high caloric diet. Dental care includes three main strategies: Prevention by consequent oral hygiene and reduction of cariogenic nutrition is of paramount importance to minimize caries development; the restoration of enamel and dentin defects with fillings and stainless steel crowns to guarantee structure and function of teeth; and extractions of most severely affected teeth with osteolytic foci to remove continuous sources of oral infections.
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Affiliation(s)
- Elke Sadler
- Universitätskilinik für Dermatologie, Paracelus Medizinische Privatuniversität Salzburg, Osterreich
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37
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Buchroithner B, Klausegger A, Ebschner U, Anton-Lamprecht I, Pohla-Gubo G, Lanschuetzer CM, Laimer M, Hintner H, Bauer JW. Analysis of the LAMB3 gene in a junctional epidermolysis bullosa patient reveals exonic splicing and allele-specific nonsense-mediated mRNA decay. J Transl Med 2004; 84:1279-88. [PMID: 15311214 DOI: 10.1038/labinvest.3700164] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [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: 11/09/2022] Open
Abstract
How splicing, the process of intron removal in pre-messenger RNA (mRNA), is carried out with such fidelity in human cells is still not understood, although some general rules are being proposed mainly by in vitro experiments. These rules are currently being redefined by analysis of splicing mechanisms in patients presenting splicing defects. We analysed material of a patient suffering from junctional epidermolysis bullosa, a heritable blistering skin disease. Absence of laminin-5 protein together with hypoplastic hemidesmosomes at the dermo-epidermal junction in the patient's skin was shown by immunohistochemical analysis and immunoelectron microscopy. Subsequent DNA analysis revealed heterozygosity for the mutations R635X and 3009C-->T in the LAMB3 gene. The latter did not alter codon translation, but introduced an exonic splice site in exon 20. Interestingly, this exonic splice site, which presented a splice score of only 68.6, was preferentially used by the spliceosome over the wild-type splice site at the exon 20-intron 20 border, which showed a splice score of 92.2. LAMB3 mRNA was still detectable in RT-PCR analysis although the aberrantly spliced mRNA leads to a stop codon in exon 21, 5' of the commonly assumed 3' border for nonsense-mediated mRNA decay. These results describe an exception to the proposed rules of pre-mRNA splicing and RNA degradation.
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Affiliation(s)
- Birgit Buchroithner
- Department of Dermatology, Paracelsus Private Medical University of Salzburg, Salzburg, Austria
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Lanschuetzer CM, Klausegger A, Pohla-Gubo G, Hametner R, Richard G, Uitto J, Hintner H, Bauer JW. Gene symbol: KRT14. Disease: epidermolysis bullosa simplex, Koebner. Hum Genet 2004; 115:171. [PMID: 15300974] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Affiliation(s)
- C M Lanschuetzer
- Paracelcus Medical University, Dep. of Dermatology, Salzburg, Austria
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Lanschuetzer CM, Muss WH, Emberger M, Pohla-Gubo G, Klausegger A, Bauer JW, Hintner H. Gene symbol: Kind1. Disease: kindler syndrome. Hum Genet 2004; 115:175. [PMID: 15300990] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Affiliation(s)
- C M Lanschuetzer
- Paracelcus Medical University, Dep. of Dermatology, Salzburg, Austria
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Moll PR, Klausegger A, Hintner H, Reischl W, Breitenbach M, Richter K. Identification of vitamin D target genes in human keratinocytes by subtractive screening. J Steroid Biochem Mol Biol 2004; 89-90:261-7. [PMID: 15225782 DOI: 10.1016/j.jsbmb.2004.03.077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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] [Indexed: 01/29/2023]
Abstract
1alpha,25-dihydroxyvitamin D(3) (1alpha,25(OH)(2) D(3)) imposes cell cycle block in late G1 phase in cultured human keratinocytes. We wanted to identify early vitamin D target genes using a subtractive screening approach. Human foreskin keratinocytes were grown to about 70% confluence, treated with 2 x 10(-7) M 1alpha,25(OH)(2) D(3) or left untreated and RNA from both populations were isolated after 22h of incubation. cDNA was synthesised and cloned into plasmid vectors. For screening of the libraries, cDNA was amplified in vitro using T7 RNA polymerase and then the amplified RNA (driver, control population) and single stranded cDNA (tester) were used for subtractive hybridisation. Heterohybrids were then separated from single stranded nucleotides using a hydroxyapatite column. The radiolabeled single stranded cDNA was used for screening a colony blot. Positive clones were rescreened, plasmid DNA was isolated and used for verifying the results by Northern blot analysis, using RNA isolated from untreated keratinocytes, as well as RNA isolated after 6h, 12h and 24h of vitamin D treatment.
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Affiliation(s)
- Pamela Renate Moll
- Department of Genetics and General Biology, University of Salzburg, Hellbrunnerstrasse 34, A-5020 Salzburg, Austria.
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Kofler B, Berger A, Santic R, Moritz K, Almer D, Tuechler C, Lang R, Emberger M, Klausegger A, Sperl W, Bauer JW. Expression of Neuropeptide Galanin and Galanin Receptors in Human Skin. J Invest Dermatol 2004; 122:1050-3. [PMID: 15102097 DOI: 10.1111/j.0022-202x.2004.22418.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lanschuetzer CM, Emberger M, Hametner R, Klausegger A, Pohla-Gubo G, Hintner H, Bauer JW. Pathogenic mechanisms in epidermolysis bullosa naevi. Acta Derm Venereol 2004; 83:332-7. [PMID: 14609098 DOI: 10.1080/00015550310012674] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [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: 10/26/2022] Open
Abstract
Epidermolysis bullosa naevi are large, eruptive melanocytic naevi which frequently arise in areas of former blisters in patients suffering from inherited epidermolysis bullosa. Morphologically, these naevi are similar to malignant melanoma, although so far no malignant transformation has been observed. To investigate the pathogenesis of these moles we documented their clinical evolution and their histopathological and immunocytological characteristics in three patients with epidermolysis bullosa. Clinically, we observed signs of malignant transformation, such as explosive growth and the occurrence of satellite lesions of epidermolysis bullosa naevi. However, malignant melanoma was excluded by histopathological evaluation. In addition, we evaluated the concentrations of various factors known to stimulate melanocyte growth in blister fluid. Human interleukin 8, basic fibroblast growth factor, human hepatocyte growth factor, GM-CSF, leukotriene B4 and prostaglandin E2 revealed concentrations comparable with the levels in inflammatory blisters. We were able to detect individual melanocytes/naevus cells in blister fluid from a blister over an epidermolysis bullosa naevus. The factors detected in the blister fluid might therefore promote the proliferation, migration and melanogenesis of disconnected melanocytes/naevus cells representing the basis of the highly dynamic appearance of epidermolysis bullosa naevi.
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Lanschuetzer CM, Muss WH, Emberger M, Pohla-Gubo G, Klausegger A, Bauer JW, Hintner H. Characteristic immunohistochemical and ultrastructural findings indicate that Kindler's syndrome is an apoptotic skin disorder. J Cutan Pathol 2003; 30:553-60. [PMID: 14507403 DOI: 10.1034/j.1600-0560.2003.00119.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [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: 01/16/2023]
Abstract
BACKGROUND Kindler's syndrome is a rare genodermatosis mainly characterized by the onset of skin blistering in early childhood, web formation of fingers and toes, photosensitivity, and progressive poikiloderma. There is still debate whether this disease represents a distinctive entity in the spectrum of congenital bullous poikilodermas or a variant of dystrophic epidermolysis bullosa. OBJECTIVE To evaluate the recently proposed and debated characteristic immunohistochemical and ultrastructural features of Kindler's syndrome. PATIENT/METHODS Immunofluorescence (IF) antigen mapping and transmission electron microscopy (TEM) were performed on a skin specimen from non-sun-exposed inner aspect of the upper arm of a 49-year-old patient with characteristic clinical features of Kindler's syndrome. RESULTS IF studies revealed focally an extensively broadened, partly reticular staining pattern in the dermoepidermal basement membrane zone (BMZ) with antibodies against laminin-5 and type IV as well as type VII collagen. Anti-alpha6 and beta4 integrin staining revealed small gaps in the linear reactivity in the BMZ. Abundant keratin bodies, as detected by anti-immunoglobulin M (IgM) staining, were focally present in the dermis, indicating prominent epidermal apoptosis. This was verified by a histochemical apoptosis stain [terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) reaction]. Transmission electron microscopic examination showed manifold reduplications of the lamina densa (with attached anchoring fibrils) as well as a keratin body surrounded by a fibroblast in the upper dermis. CONCLUSION We present characteristic immunohistochemical and ultrastructural features of Kindler's syndrome identical to those described by Shimizu et al. and provide evidence that Kindler's syndrome might primarily be an apoptotic disorder of basal keratinocytes.
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Affiliation(s)
- C M Lanschuetzer
- Department of Dermatology, and Institute of Pathological Anatomy, General Hospital Salzburg, Salzburg, Austria
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Dallinger G, Puttaraju M, Mitchell LG, Yancey KB, Yee C, Klausegger A, Hintner H, Bauer JW. Development of spliceosome-mediated RNA trans-splicing (SMaRT) for the correction of inherited skin diseases. Exp Dermatol 2003; 12:37-46. [PMID: 12631245 DOI: 10.1034/j.1600-0625.2003.120105.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [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: 11/23/2022]
Abstract
Gene therapy of large genes (e.g. plectin and collagen genes) is hampered by size limitations for insertions of the currently used viral vectors. To reduce the size of these insertions spliceosome-mediated RNA trans-splicing (SMaRT), which provides intron-specific gene-correction at the pre-RNA level, can be an alternative approach. To test its applicability in skin gene therapy, SMaRT was used in the context of the 4003delTC mutation in the collagen XVII gene (COL17A1) causing generalized atrophic benign junctional epidermolysis bullosa. A beta-galactosidase (beta-gal) trans-splicing assay system was established using intron 51 of COL17A1 as the target for trans-splicing. In this system, intron 51 is flanked by the 5'exon and the 3'exon of the beta-gal gene, the latter containing two in-frame stop codons. Cotransfection of a pre-trans-splicing molecule consisting of the binding domain of intron 51 and the 3'exon of beta-gal without the stop codons resulted in a 300-fold increase of beta-gal activity compared to controls. A 2-3-fold increase in efficiency was obtained through an elongation of the binding domains. Replacement of the complete 3'end of the COL17A1 gene was shown using a collagen XVII mini-gene construct. The beta-gal assay was used in human keratinocytes to evaluate the influence of a keratinocyte-specific spliceosome background. Reverse transcription polymerase chain reaction and beta-gal activity assay showed functional correction of the stop-codons in cultured human keratinocytes and in an immortalized GABEB cell line harbouring the 4003delTC mutation. These results demonstrate that SMaRT is feasible in a keratinocyte-specific context and therefore may be applied in skin gene therapy.
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Affiliation(s)
- G Dallinger
- Department of Dermatology, General Hospital, Salzburg, Austria
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Lanschuetzer CM, Klausegger A, Pohla-Gubo G, Hametner R, Richard G, Uitto J, Hintner H, Bauer JW. A novel homozygous nonsense deletion/insertion mutation in the keratin 14 gene (Y248X; 744delC/insAG) causes recessive epidermolysis bullosa simplex type Köbner. Clin Exp Dermatol 2003; 28:77-9. [PMID: 12558637 DOI: 10.1046/j.1365-2230.2003.01218.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [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: 11/20/2022]
Abstract
We report the sixth case of a human keratin 14 'knockout' mutation resulting in recessive epidermolysis bullosa simplex (EBS). A novel, homozygous nonsense mutation resulting from a deletion/insertion mutation (744delC/insAG) leads to a premature termination codon in the KRT14 gene (Y248X). The patient suffers from generalized cutaneous blistering since birth, mild nail dystrophy, involvement of mucous membranes and multiple epidermolysis bullosa naevi. The clinical variability noted in K14-deficient EBS patients suggests phenotypic modulation by additional genetic and/or epigenetic factors.
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Affiliation(s)
- C M Lanschuetzer
- Department of Dermatology, General Hospital Salzburg, Salzburg, Austria
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46
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Klausegger A, Pulkkinen L, Pohla-Gubo G, Dallinger G, Puttinger R, Uitto J, Hintner H, Bauer JW. Is screening of the candidate gene necessary in unrelated partners of members of families with Herlitz junctional epidermolysis bullosa? J Invest Dermatol 2001; 116:474-5. [PMID: 11231327 DOI: 10.1046/j.1523-1747.2001.12793.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Bauer JW, Rouan F, Kofler B, Rezniczek GA, Kornacker I, Muss W, Hametner R, Klausegger A, Huber A, Pohla-Gubo G, Wiche G, Uitto J, Hintner H. A compound heterozygous one amino-acid insertion/nonsense mutation in the plectin gene causes epidermolysis bullosa simplex with plectin deficiency. Am J Pathol 2001; 158:617-25. [PMID: 11159198 PMCID: PMC1850321 DOI: 10.1016/s0002-9440(10)64003-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Plectin is a cytoskeleton linker protein expressed in a variety of tissues including skin, muscle, and nerves. Mutations in its gene are associated with epidermolysis bullosa simplex with late-onset muscular dystrophy. Whereas in most of these patients the pathogenic events are mediated by nonsense-mediated mRNA decay, the consequences of an in-frame mutation are less clear. We analyzed a patient with compound heterozygosity for a 3-bp insertion at position 1287 leading to the insertion of leucine as well as the missense mutation Q1518X leading to a stop codon. The presence of plectin mRNA was demonstrated by a RNase protection assay. However, a marked reduction of plectin protein was found using immunofluorescence microscopy of the patient's skin and Western blot analysis of the patient's cultured keratinocytes. The loss of plectin protein was associated with morphological alterations in plectin-containing structures of the dermo-epidermal junction, in skeletal muscle, and in nerves as detected by electron microscopy. In an in vitro overlay assay using recombinant plectin peptides spanning exons 2 to 15 the insertion of leucine resulted in markedly increased self-aggregation of plectin peptides. These results describe for the first time the functional consequences of an in-frame insertion mutation in humans.
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Affiliation(s)
- J W Bauer
- Department of Dermatology, Children's Hospital Salzburg, Austria.
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Abstract
A simple PCR set-up for the detection of cytomegalovirus in clinical specimen was developed. All components of the PCR master mix including Taq DNA polymerase, uracil N-glycosilase, and primers were preformulated and stored frozen in aliquots. After thawing the master mix aliquots, the PCR was immediately started after the addition of sample DNA. This method gave excellent reproducible PCR-results without loss of enzyme activities following storage at -20 degrees C for at least 4 months.
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Affiliation(s)
- B Kofler
- Children's Hospital, General Hospital Salzburg, Austria
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Klausegger A, Strobl B, Regl G, Kaser A, Luytjes W, Vlasak R. Identification of a coronavirus hemagglutinin-esterase with a substrate specificity different from those of influenza C virus and bovine coronavirus. J Virol 1999; 73:3737-43. [PMID: 10196267 PMCID: PMC104150 DOI: 10.1128/jvi.73.5.3737-3743.1999] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/1998] [Accepted: 01/26/1999] [Indexed: 11/20/2022] Open
Abstract
We have characterized the hemagglutinin-esterase (HE) of puffinosis virus (PV), a coronavirus closely related to mouse hepatitis virus (MHV). Analysis of the cloned gene revealed approximately 85% sequence identity to HE proteins of MHV and approximately 60% identity to the corresponding esterase of bovine coronavirus. The HE protein exhibited acetylesterase activity with synthetic substrates p-nitrophenyl acetate, alpha-naphthyl acetate, and 4-methylumbelliferyl acetate. In contrast to other viral esterases, no activity was detectable with natural substrates containing 9-O-acetylated sialic acids. Furthermore, PV esterase was unable to remove influenza C virus receptors from human erythrocytes, indicating a substrate specificity different from HEs of influenza C virus and bovine coronavirus. Solid-phase binding assays revealed that purified PV was unable to bind to sialic acid-containing glycoconjugates like bovine submaxillary mucin, mouse alpha1 macroglobulin or bovine brain extract. Because of the close relationship to MHV, possible implications on the substrate specificity of MHV esterases are suggested.
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Affiliation(s)
- A Klausegger
- Institute of Molecular Biology, Austrian Academy of Sciences, A-5020 Salzburg, Austria
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Klausegger A, Hell M, Berger A, Zinober K, Baier S, Jones N, Sperl W, Kofler B. Gram type-specific broad-range PCR amplification for rapid detection of 62 pathogenic bacteria. J Clin Microbiol 1999; 37:464-6. [PMID: 9889245 PMCID: PMC84344 DOI: 10.1128/jcm.37.2.464-466.1999] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.0] [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: 11/20/2022] Open
Abstract
Broad-range PCR has proven to be useful for the detection of bacteria. A set of broad-range PCR primers directed against conserved regions in the 16S rRNA gene was designed to specifically amplify either gram-positive or gram-negative bacteria. The gram type-specific broad-range PCR correctly classified all 62 pathogenic species tested.
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Affiliation(s)
- A Klausegger
- Children's Hospital, General Hospital Salzburg, Salzburg, Austria
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