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Procedures for Identifying Infectious Prions After Passage Through the Digestive System of an Avian Species
Published on: November 6, 2013
[Trials of in vitro propagation of the scrapie agent in mouse nerve cells]
Abstract:
We attempted to propagate the Scrapie agent in vitro in glia and neuroblastoma cells of Mice. Four out of seven assays of infection were positive, i.e. after several passages in vitro yielding at most a 10(9) fold final dilution of the original material, the extracts of each of the four cultures, when injected intracerebrally into CD1 Mice, produced a deadly disease displaying the clinical and pathological signs characteristic of Scrapie.
Insights
Researchers successfully propagated the Scrapie agent in vitro using mouse glia and neuroblastoma cells. In vitro cultures, when injected into mice, caused Scrapie disease, confirming successful agent propagation.
Area of Science:
- Neuroscience
- Infectious Diseases
- Cell Biology
Context:
- Scrapie is a fatal neurodegenerative disease affecting sheep and goats.
- Understanding the propagation mechanisms of Scrapie is crucial for developing diagnostic and therapeutic strategies.
- Previous attempts to propagate the Scrapie agent in vitro have yielded limited success.
Purpose:
- To investigate the possibility of propagating the Scrapie agent in vitro using established cell lines.
- To determine if in vitro propagated Scrapie agent retains its infectivity and pathogenicity.
Summary:
- The Scrapie agent was cultured in vitro using mouse glia and neuroblastoma cells.
- Four out of seven cultures showed positive results after several passages.
- Extracts from positive cultures, when injected into mice, induced Scrapie disease with characteristic clinical and pathological signs.
Impact:
- This study demonstrates the feasibility of in vitro propagation of the Scrapie agent.
- The findings provide a valuable tool for further research into Scrapie pathogenesis and prion biology.
- Successful in vitro propagation may facilitate the development of novel antiviral therapies and diagnostic tools for prion diseases.
