Open AccessComparative Study of IntraneuronaI Polyglucosan Bodies in Brains from Patients with Lafora Disease and Aged Dogs
Author(s) -
Yamanami Sadayoshi,
Ishihara Tokuhiro,
Takahashi Mutsuo,
Uchino Fumiya
Publication year - 1992
Publication title -
acta patholigica japonica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 74
ISSN - 0001-6632
DOI - 10.1111/j.1440-1827.1992.tb01879.x
Subject(s) - pathology , medicine , disease , lafora disease , biology , biochemistry , phosphorylation , phosphatase
We compared intraneuronal polyglucosan body (PGB) in brains from two patients diagnosed as having Lafora disease and from 18 aged dogs (age range: 10 to 22 years, various breeds). PGBs appeared as various‐sized spheroids intensely stained with periodic acid Schiff (PAS) in both humans and aged dogs. lmmunohistochemistry with a monoclonal antibody raised against human polyglucosan showed positive staining of the PGBs. Ultrastructurally, PGBs in both humans and aged dogs were composed of fibril‐like structures 4 to 20 nm wide. Electron‐dense material formed the central cores of the fibrils, but was also scattered in their peripheral areas. The fibril‐like structures were intensely stained upon application of the Thiéry procedure. lmmunoelectron microscopy showed that the fibril‐like structures were specifically labeled with gold particles. The histological, immunohistochemical and ultrastructural features of the PGBs in humans and aged dogs were quite similar. Acta Pathol Jpn 42: 787–792, 1992.