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Hytönen MK, Viitanen S, Hundi S, Donner J, Lohi H, Kaukonen M. A frameshift deletion in F8 associated with hemophilia A in Labrador Retriever dogs. Anim Genet 2023; 54:606-612. [PMID: 37438956 DOI: 10.1111/age.13345] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 06/27/2023] [Accepted: 06/27/2023] [Indexed: 07/14/2023]
Abstract
Hemophilia A is the most common inherited coagulation factor disorder in dogs. It manifests as excessive bleeding resulting from pathogenic variants in the X-chromosomal F8 gene encoding coagulation factor VIII (FVIII) protein. In this study, we performed careful clinical phenotyping to confirm hemophilia A in two distinct Labrador Retriever (LR) pedigrees. Whole-genome sequencing on an affected dog from litter 1 identified a case-specific frameshift deletion variant in F8 predicted to cause a premature stop codon (c.2923_2924del, p.(E975Kfs*8)). This variant was hemizygous in all the affected males from litter 1 (n = 3), while all the unaffected LRs in the pedigree were heterozygous or wild-type (n = 22). Additionally, screened samples from 199 LRs were all found to be wild-type. As a result of this study, a gene test can now be developed to screen dogs before breeding to prevent further cases. However, it is important to note that the affected LR with decreased FVIII activity from litter 2 was wild-type for the identified deletion variant, and no segregating F8 variants were detected when this dog's DNA sample was whole-genome sequenced. Thus, the cause of decreased FVIII activity in this dog remains to be unraveled in future studies.
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Affiliation(s)
- Marjo K Hytönen
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
- Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
| | - Sanna Viitanen
- Department of Equine and Small Animal Medicine, University of Helsinki, Helsinki, Finland
| | - Sruthi Hundi
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
- Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
| | - Jonas Donner
- Wisdom Panel Research Team, Wisdom Panel, Kinship, Helsinki, Finland
| | - Hannes Lohi
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
- Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
| | - Maria Kaukonen
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
- Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
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Niskanen JE, Ohlsson Å, Ljungvall I, Drögemüller M, Ernst RF, Dooijes D, van Deutekom HWM, van Tintelen JP, Snijders Blok CJB, van Vugt M, van Setten J, Asselbergs FW, Petrič AD, Salonen M, Hundi S, Hörtenhuber M, Kere J, Pyle WG, Donner J, Postma AV, Leeb T, Andersson G, Hytönen MK, Häggström J, Wiberg M, Friederich J, Eberhard J, Harakalova M, van Steenbeek FG, Wess G, Lohi H. Identification of novel genetic risk factors of dilated cardiomyopathy: from canine to human. Genome Med 2023; 15:73. [PMID: 37723491 PMCID: PMC10506233 DOI: 10.1186/s13073-023-01221-3] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 08/17/2023] [Indexed: 09/20/2023] Open
Abstract
BACKGROUND Dilated cardiomyopathy (DCM) is a life-threatening heart disease and a common cause of heart failure due to systolic dysfunction and subsequent left or biventricular dilatation. A significant number of cases have a genetic etiology; however, as a complex disease, the exact genetic risk factors are largely unknown, and many patients remain without a molecular diagnosis. METHODS We performed GWAS followed by whole-genome, transcriptome, and immunohistochemical analyses in a spontaneously occurring canine model of DCM. Canine gene discovery was followed up in three human DCM cohorts. RESULTS Our results revealed two independent additive loci associated with the typical DCM phenotype comprising left ventricular systolic dysfunction and dilatation. We highlight two novel candidate genes, RNF207 and PRKAA2, known for their involvement in cardiac action potentials, energy homeostasis, and morphology. We further illustrate the distinct genetic etiologies underlying the typical DCM phenotype and ventricular premature contractions. Finally, we followed up on the canine discoveries in human DCM patients and discovered candidate variants in our two novel genes. CONCLUSIONS Collectively, our study yields insight into the molecular pathophysiology of DCM and provides a large animal model for preclinical studies.
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Affiliation(s)
- Julia E Niskanen
- Department of Medical and Clinical Genetics, University of Helsinki, Haartmaninkatu 8, 00290, Helsinki, Finland
- Department of Veterinary Biosciences, University of Helsinki, Agnes Sjöbergin katu 2, 00790, Helsinki, Finland
- Folkhälsan Research Center, Haartmaninkatu 8, P.O.Box 63, 00290, Helsinki, Finland
| | - Åsa Ohlsson
- Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Ingrid Ljungvall
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Michaela Drögemüller
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, 3001, Switzerland
| | - Robert F Ernst
- Department of Genetics, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Dennis Dooijes
- Department of Genetics, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Hanneke W M van Deutekom
- Department of Genetics, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands
| | - J Peter van Tintelen
- Department of Genetics, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Christian J B Snijders Blok
- Department of Cardiology, Division Heart & Lungs, University Medical Center Utrecht (UMCU), Utrecht, The Netherlands
- Regenerative Medicine Centre Utrecht, University of Utrecht, Utrecht, The Netherlands
| | - Marion van Vugt
- Department of Cardiology, Division Heart & Lungs, University Medical Center Utrecht (UMCU), Utrecht, The Netherlands
| | - Jessica van Setten
- Department of Cardiology, Division Heart & Lungs, University Medical Center Utrecht (UMCU), Utrecht, The Netherlands
| | - Folkert W Asselbergs
- Amsterdam University Medical Centers, Department of Cardiology, University of Amsterdam, Amsterdam, The Netherlands
- Health Data Research UK and Institute of Health Informatics, University College London, London, UK
| | | | - Milla Salonen
- Department of Medical and Clinical Genetics, University of Helsinki, Haartmaninkatu 8, 00290, Helsinki, Finland
- Department of Veterinary Biosciences, University of Helsinki, Agnes Sjöbergin katu 2, 00790, Helsinki, Finland
- Folkhälsan Research Center, Haartmaninkatu 8, P.O.Box 63, 00290, Helsinki, Finland
| | - Sruthi Hundi
- Department of Medical and Clinical Genetics, University of Helsinki, Haartmaninkatu 8, 00290, Helsinki, Finland
- Department of Veterinary Biosciences, University of Helsinki, Agnes Sjöbergin katu 2, 00790, Helsinki, Finland
- Folkhälsan Research Center, Haartmaninkatu 8, P.O.Box 63, 00290, Helsinki, Finland
| | - Matthias Hörtenhuber
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
| | - Juha Kere
- Folkhälsan Research Center, Haartmaninkatu 8, P.O.Box 63, 00290, Helsinki, Finland
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
- Research Programs Unit, Stem Cells and Metabolism Research Program, University of Helsinki, Helsinki, Finland
| | - W Glen Pyle
- Department of Biomedical Sciences, University of Guelph, Guelph, ON, Canada
- IMPART Investigator Team Canada, Dalhousie Medicine, Saint John, NB, Canada
| | - Jonas Donner
- Wisdom Panel Research Team, Wisdom Panel, Kinship, Helsinki, Finland
| | - Alex V Postma
- Department of Human Genetics, Amsterdam University Medical Center, Amsterdam, The Netherlands
- Department of Medical Biology, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Tosso Leeb
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, 3001, Switzerland
| | - Göran Andersson
- Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Marjo K Hytönen
- Department of Medical and Clinical Genetics, University of Helsinki, Haartmaninkatu 8, 00290, Helsinki, Finland
- Department of Veterinary Biosciences, University of Helsinki, Agnes Sjöbergin katu 2, 00790, Helsinki, Finland
- Folkhälsan Research Center, Haartmaninkatu 8, P.O.Box 63, 00290, Helsinki, Finland
| | - Jens Häggström
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Maria Wiberg
- Department of Equine and Small Animal Medicine, University of Helsinki, Helsinki, Finland
| | - Jana Friederich
- LMU Small Animal Clinic, Ludwig Maximilians University of Munich, Munich, Germany
| | - Jenny Eberhard
- LMU Small Animal Clinic, Ludwig Maximilians University of Munich, Munich, Germany
| | - Magdalena Harakalova
- Department of Cardiology, Division Heart & Lungs, University Medical Center Utrecht (UMCU), Utrecht, The Netherlands
- Regenerative Medicine Centre Utrecht, University of Utrecht, Utrecht, The Netherlands
| | - Frank G van Steenbeek
- Department of Cardiology, Division Heart & Lungs, University Medical Center Utrecht (UMCU), Utrecht, The Netherlands
- Regenerative Medicine Centre Utrecht, University of Utrecht, Utrecht, The Netherlands
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 108, Utrecht, 3584 CM, The Netherlands
| | - Gerhard Wess
- LMU Small Animal Clinic, Ludwig Maximilians University of Munich, Munich, Germany
| | - Hannes Lohi
- Department of Medical and Clinical Genetics, University of Helsinki, Haartmaninkatu 8, 00290, Helsinki, Finland.
- Department of Veterinary Biosciences, University of Helsinki, Agnes Sjöbergin katu 2, 00790, Helsinki, Finland.
- Folkhälsan Research Center, Haartmaninkatu 8, P.O.Box 63, 00290, Helsinki, Finland.
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Dillard KJ, Ochs M, Niskanen JE, Arumilli M, Donner J, Kyöstilä K, Hytönen MK, Anttila M, Lohi H. Recessive missense LAMP3 variant associated with defect in lamellar body biogenesis and fatal neonatal interstitial lung disease in dogs. PLoS Genet 2020; 16:e1008651. [PMID: 32150563 PMCID: PMC7082050 DOI: 10.1371/journal.pgen.1008651] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 03/08/2019] [Revised: 03/19/2020] [Accepted: 02/04/2020] [Indexed: 01/06/2023] Open
Abstract
Neonatal interstitial lung diseases due to abnormal surfactant biogenesis are rare in humans and have never been reported as a spontaneous disorder in animals. We describe here a novel lung disorder in Airedale Terrier (AT) dogs with clinical symptoms and pathology similar to the most severe neonatal forms of human surfactant deficiency. Lethal hypoxic respiratory distress and failure occurred within the first days or weeks of life in the affected puppies. Transmission electron microscopy of the affected lungs revealed maturation arrest in the formation of lamellar bodies (LBs) in the alveolar epithelial type II (AECII) cells. The secretory organelles were small and contained fewer lamellae, often in combination with small vesicles surrounded by an occasionally disrupted common limiting membrane. A combined approach of genome-wide association study and whole exome sequencing identified a recessive variant, c.1159G>A, p.(E387K), in LAMP3, a limiting membrane protein of the cytoplasmic surfactant organelles in AECII cells. The substitution resides in the LAMP domain adjacent to a conserved disulfide bond. In summary, this study describes a novel interstitial lung disease in dogs, identifies a new candidate gene for human surfactant dysfunction and brings important insights into the essential role of LAMP3 in the process of the LB formation.
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Affiliation(s)
- Kati J. Dillard
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
- Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
- Veterinary Bacteriology and Pathology Research Unit, Finnish Food Authority, Helsinki, Finland
| | - Matthias Ochs
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
- Institute of Functional Anatomy, Charité - Universitaetsmedizin Berlin, Berlin, Germany
- German Center for Lung Research (DZL), Berlin, Germany
| | - Julia E. Niskanen
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
- Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
| | - Meharji Arumilli
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
- Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
| | - Jonas Donner
- Genoscoper Laboratories Ltd (Wisdom Health), Helsinki, Finland
| | - Kaisa Kyöstilä
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
- Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
| | - Marjo K. Hytönen
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
- Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
| | - Marjukka Anttila
- Veterinary Bacteriology and Pathology Research Unit, Finnish Food Authority, Helsinki, Finland
| | - Hannes Lohi
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
- Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
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