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Idiopathic complex polysaccharide storage disease in an abyssinian cat
1Animal Disease Diagnostic Laboratory, School of Veterinary Medicine, Purdue University, West Lafayette, IN 47907-2065, USA. ilangohr@purdue.edu
Veterinary Pathology
|July 12, 2005
Summary
A rare glycogen storage disease caused progressive paralysis in a cat. The condition involved abnormal glycogen accumulation in muscle and nervous tissues, with the exact cause remaining unknown.
Area of Science:
- Veterinary Pathology
- Biochemistry
- Animal Neurology
Background:
- This study details a case of a 10-year-old Abyssinian cat diagnosed with a glycogen storage disease.
- The disease primarily affected skeletal muscle, with lesser involvement of cardiac muscle, spinal cord, and brain.
- The cat presented with a 4-year history of paresis that progressed to acute paralysis.
Observation:
- Microscopic examination revealed pale basophilic inclusions in affected tissues.
- These inclusions were diastase resistant, periodic acid-Schiff positive, and stained blue-to-black with iodine.
- Transmission electron microscopy showed these to be nonmembrane-bound, cytosolic deposits of granular and filamentous material.
Findings:
- Histochemical and structural characteristics indicated the inclusions were aggregates of abnormally stored, unbranched glycogen.
- The findings are consistent with a glycogen storage disease impacting multiple organ systems.
- The precise molecular defect in glucose metabolism was not identified.
Implications:
- This case expands the understanding of glycogen storage diseases in felines.
- It highlights the potential for progressive neuromuscular dysfunction due to metabolic defects.
- Further research into glucose metabolism disorders in animals is warranted.
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