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Comparative pathology of the canine model of glycogen storage disease type II (Pompe's disease)
Author(s) -
Walvoort H. C.,
Dormans J. A. M. A.,
Ingh T. S. G. A. M.
Publication year - 1985
Publication title -
journal of inherited metabolic disease
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.462
H-Index - 102
eISSN - 1573-2665
pISSN - 0141-8955
DOI - 10.1007/bf01805484
Subject(s) - glycogen storage disease , human genetics , disease , medicine , metabolic disease , pathology , biology , genetics , gene
The pathology of canine glycogen storage disease type II (acid α‐glucosidase deficiency, GSD II) was studied in three genetically related Lapland dogs and compared to the pathology of human GSD II (McKusick 23230). Canine GSD II closely parallels the infantile form of the human disease, except for the presence of oesophageal dilatation. Generalized glycogen storage particularly affected muscular tissues (skeletal, oesophageal, cardiac and smooth muscle). The altered cells showed glycogen accumulation in the cytosol and in autophagic membrane‐bound vacuoles (glycogenosomes). They also showed increased acid phosphatase activity consistent with the lysosomal nature of this storage disorder. The cytopathology in canine and human GSD II appears to evolve from segregation of glycogen during regular cellular autophagy, phagolysosomal accumulation of the undigested glycogen, and eventually rupture of distended glycogenosomes. This study indicates that the usefulness of canine GSD II as an animal model of human disease, extends to the area of pathogenesis.