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Ultrastructural changes in the progress of natural Scrapie regardless fixation protocol
Rocío Sarasa1, Concepción Junquera, Adolfo Toledano
1Research Centre for Encephalopathies and Transmissible Emerging Diseases, University of Zaragoza, C/Miguel Servet 177, 50013, Saragossa, Spain.
Histochemistry and Cell Biology
|March 1, 2015
Summary
Ultrastructural analysis of natural prion diseases, like Scrapie, reveals consistent subcellular lesions in the cerebellum. These findings are detectable regardless of sample fixation, enabling broader use of tissue banks for neurodegenerative disease research.
Area of Science:
- Neuroscience
- Pathology
- Cell Biology
Background:
- Limited ultrastructural studies exist for natural prion diseases.
- Understanding subcellular lesions is crucial for elucidating disease pathogenesis.
- Classifying variations by disease stage is currently lacking.
Purpose of the Study:
- To identify consistent subcellular pathological changes in natural prion diseases.
- To assess the impact of fixation protocols on ultrastructural lesion detection.
- To characterize lesions in the cerebellum at different disease stages.
Main Methods:
- Ultrastructural analysis of brain tissue from animals at various disease stages.
- Comparative assessment of lesions across different fixation protocols.
- Histopathological examination focusing on the cerebellum.
Main Results:
- Novel ultrastructural lesions, including vacuolation around Purkinje cells and glial cell association, were identified in natural Scrapie.
- Disruption of hypolemmal cisterns in Purkinje cells and primary cilia in the granular layer are first-time findings in prion diseases.
- Ultrastructural changes are evident irrespective of the fixation method used.
Conclusions:
- Consistent ultrastructural lesions in natural prion diseases can be identified.
- The study confirms the feasibility of using samples regardless of fixation protocol for ultrastructural studies.
- This approach maximizes the utility of valuable tissue bank samples for prion disease research.
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