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Normal development and behaviour of mice lacking the neuronal cell-surface PrP protein
Nature
|April 16, 1992
Summary
Mice lacking the PrPC protein, essential for prion diseases like scrapie, show normal development and behavior. This research paves the way to study prion propagation and scrapie susceptibility in PrPC-deficient mice.
Area of Science:
- Neuroscience
- Molecular Biology
- Immunology
Background:
- PrPC is a host protein found on the surface of neurons and other cells.
- The prion, the infectious agent of scrapie, is thought to be a misfolded form of PrPC.
- Mice with disrupted PrP genes (PrPC-deficient) have been created.
Purpose of the Study:
- To investigate the physiological role of PrPC.
- To determine if PrPC-deficient mice can propagate prions.
- To assess scrapie pathogenesis in the absence of PrPC.
Main Methods:
- Generation of mice homozygous for disrupted PrP genes.
- Observation of mouse development and behavior for at least seven months.
- Assessment of immunological defects.
Main Results:
- PrPC-deficient mice exhibit normal development and behavior up to seven months.
- No apparent immunological defects were observed in these mice.
- The feasibility of studying prion propagation and scrapie pathogenesis in these mice is established.
Conclusions:
- PrPC is not essential for normal development and basic physiological functions in mice up to seven months.
- PrPC-deficient mice provide a novel model for studying the fundamental mechanisms of prion diseases.
- Further research can now explore prion replication and disease progression in the absence of the host PrPC protein.
