Acta Neuropathologica

, Volume 82, Issue 5, pp 340–345

Reexamination of granulovacuolar degeneration

  • K. Okamoto
  • S. Hirai
  • T. Iizuka
  • T. Yanagisawa
  • M. Watanabe
Regular Papers

DOI: 10.1007/BF00296544

Cite this article as:
Okamoto, K., Hirai, S., Iizuka, T. et al. Acta Neuropathol (1991) 82: 340. doi:10.1007/BF00296544

Summary

Granulovacuolar degeneration (GVD) in the hippocampal pyramidal neurons of Alzheimer-type dementia was examined. Immunohistochemical examinations showed that the majority of centrally located granules were positive for ubiquitin. Based on electron microscopic observations, morphogenesis of GVD is considered to be as follows. Slight-to-moderate amounts of electron-dense material appear in the cytoplasm at the early stage, and are then surrounded and demarcated by a two-layered membrane (probably from smooth endoplasmic reticulum). Following this some inner material is digested forming floccular and liquid-like materials, while undigested material remains as coarse electron-dense granules. Specifically, granulovacuoles are considered to be an age-related special type of autophagosome. Analytical electron microscopy disclosed that the granules in GVD contained some aluminum.

Key words

Ubiquitin granulovacuolar degeneration ageing 

Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • K. Okamoto
    • 1
  • S. Hirai
    • 1
  • T. Iizuka
    • 1
  • T. Yanagisawa
    • 1
  • M. Watanabe
    • 1
  1. 1.Department of NeurologyGunma University School of MedicineMaebashi, GunmaJapan

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