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- Title
Sarcoglycan A mutation in miniature dachshund dogs causes limb-girdle muscular dystrophy 2D.
- Authors
Mickelson, James R.; Minor, Katie M.; Guo, Ling T.; Friedenberg, Steven G.; Cullen, Jonah N.; Ciavarella, Amanda; Hambrook, Lydia E.; Brenner, Karen M.; Helmond, Sarah E.; Marks, Stanley L.; Shelton, G. Diane
- Abstract
Background: A cohort of related miniature dachshund dogs with exercise intolerance, stiff gait, dysphagia, myoglobinuria, and markedly elevated serum creatine kinase activities were identified. Methods: Muscle biopsy histopathology, immunofluorescence microscopy, and western blotting were combined to identify the specific pathologic phenotype of the myopathy, and whole genome SNP array genotype data and whole genome sequencing were combined to determine its genetic basis. Results: Muscle biopsies were dystrophic. Sarcoglycanopathy, a form of limb-girdle muscular dystrophy, was suspected based on immunostaining and western blotting, where α, β, and γ-sarcoglycan were all absent or reduced. Genetic mapping and whole genome sequencing identified a premature stop codon mutation in the sarcoglycan A subunit gene (SGCA). Affected dachshunds were confirmed on several continents. Conclusions: This first SGCA mutation found in dogs adds to the literature of genetic bases of canine muscular dystrophies and their usefulness as comparative models of human disease.
- Subjects
LIMB-girdle muscular dystrophy; MUSCULAR dystrophy; PHENOTYPES; DOGS; CREATINE kinase; NEMALINE myopathy; VETERINARY clinical pathology
- Publication
Skeletal Muscle, 2021, Vol 11, Issue 1, p1
- ISSN
2044-5040
- Publication type
Article
- DOI
10.1186/s13395-020-00257-y