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Transmission and scanning electron microscopy of spongiform change in Creutzfeldt-Jakob disease
Abstract:
Brains from three human cases of Creutzfeldt-Jakob disease and three monkey cases of transmitted Creutzfeldt-Jakob disease were examined. Spongiform change was present in all cases on both light and electron microscopic examination. Electron microscopic examination revealed membrane alterations within vacuoles in all cases. On SEM, both ulcerated and focally thickened membranes were apparent; TEM revealed splitting of unit membranes as well as focally thickened amorphous membranes. Small blisters with 70 to 150 nm particulates were seen on membranes in SEM. TEM revealed 10 nm electron-dense particles which might be either part of the infectious agent or a membrane alteration caused by it. The significance of these findings was discussed.
Insights
Microscopic examination of Creutzfeldt-Jakob disease brains revealed characteristic spongiform changes and significant alterations in vacuolar membranes. These findings offer insights into the disease
Area of Science:
- Neuroscience
- Pathology
- Microscopy
Background:
- Creutzfeldt-Jakob disease (CJD) is a fatal neurodegenerative prion disease.
- Understanding the ultrastructural changes in CJD is crucial for disease pathogenesis research.
Observation:
- Human and monkey CJD brains exhibited spongiform changes under light and electron microscopy.
- Vacuoles within brain tissue showed distinct membrane alterations.
Findings:
- Scanning Electron Microscopy (SEM) revealed ulcerated and thickened vacuolar membranes.
- Transmission Electron Microscopy (TEM) identified splitting of unit membranes and amorphous thickening.
- SEM observed small blisters containing 70-150 nm particulates on membranes.
- TEM detected 10 nm electron-dense particles, potentially linked to the infectious agent or membrane damage.
Implications:
- These ultrastructural membrane changes may be key indicators of CJD.
- Further research can elucidate the role of these particles and membrane alterations in CJD.
- Findings contribute to understanding prion disease mechanisms at a molecular level.