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Natural Progression of Canine Glycogen Storage Disease Type IIIa.
- Source :
-
Comparative medicine [Comp Med] 2016 Feb; Vol. 66 (1), pp. 41-51. - Publication Year :
- 2016
-
Abstract
- Glycogen storage disease type IIIa (GSD IIIa) is caused by a deficiency of glycogen debranching enzyme activity. Hepatomegaly, muscle degeneration, and hypoglycemia occur in human patients at an early age. Long-term complications include liver cirrhosis, hepatic adenomas, and generalized myopathy. A naturally occurring canine model of GSD IIIa that mimics the human disease has been described, with progressive liver disease and skeletal muscle damage likely due to excess glycogen deposition. In the current study, long-term follow-up of previously described GSD IIIa dogs until 32 mo of age (n = 4) and of family-owned GSD IIIa dogs until 11 to 12 y of age (n = 2) revealed that elevated concentrations of liver and muscle enzyme (AST, ALT, ALP, and creatine phosphokinase) decreased over time, consistent with hepatic cirrhosis and muscle fibrosis. Glycogen deposition in many skeletal muscles; the tongue, diaphragm, and heart; and the phrenic and sciatic nerves occurred also. Furthermore, the urinary biomarker Glc4, which has been described in many types of GSD, was first elevated and then decreased later in life. This urinary biomarker demonstrated a similar trend as AST and ALT in GSD IIIa dogs, indicating that Glc4 might be a less invasive biomarker of hepatocellular disease. Finally, the current study further demonstrates that the canine GSD IIIa model adheres to the clinical course in human patients with this disorder and is an appropriate model for developing novel therapies.
- Subjects :
- Age Factors
Animals
Biomarkers blood
Biomarkers urine
Disease Models, Animal
Disease Progression
Dog Diseases pathology
Dogs
Female
Glycogen metabolism
Glycogen Storage Disease Type III metabolism
Glycogen Storage Disease Type III pathology
Hepatomegaly metabolism
Hepatomegaly pathology
Hepatomegaly veterinary
Liver metabolism
Liver pathology
Liver Cirrhosis metabolism
Liver Cirrhosis pathology
Liver Cirrhosis veterinary
Male
Muscle, Skeletal metabolism
Muscle, Skeletal pathology
Muscular Diseases metabolism
Muscular Diseases pathology
Muscular Diseases veterinary
Species Specificity
Urolithiasis metabolism
Urolithiasis pathology
Urolithiasis veterinary
Dog Diseases metabolism
Glycogen Storage Disease Type III veterinary
Subjects
Details
- Language :
- English
- ISSN :
- 2769-819X
- Volume :
- 66
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Comparative medicine
- Publication Type :
- Academic Journal
- Accession number :
- 26884409