Related Experiment Videos
Scrapie pathogenesis in subclinically infected B-cell-deficient mice
1Institutes of Neuropathology, Department of Pathology, CH-8091 Zurich, Switzerland.
Abstract:
Prion infections can present without clinical manifestations. B-cell deficiency may be a model for subclinical transmissible spongiform encephalopathy, since it protects mice from disease upon intraperitoneal administration of scrapie prions; however, a proportion of B-cell-deficient mice accumulate protease-resistant prion protein in their brains. Here, we have characterized this subclinical disease. In addition, we have studied the possibility that a neurotoxic factor secreted by B cells may contribute to pathogenesis.
Insights
Subclinical prion infections can occur in B-cell deficient mice, characterized by prion protein accumulation without overt disease. This study investigates the nature of this subclinical state and potential B-cell-derived neurotoxins.
Area of Science:
- Neuroscience
- Immunology
- Pathology
Background:
- Prion diseases, or transmissible spongiform encephalopathies, can exist asymptomatically.
- B-cell deficiency in mice offers protection against prion disease following scrapie prion exposure.
- However, a subset of these deficient mice develops subclinical prion infections.
Purpose of the Study:
- To characterize the subclinical prion disease observed in B-cell deficient mice.
- To explore the potential role of B-cell secreted neurotoxic factors in prion pathogenesis.
Main Methods:
- Investigating B-cell deficient mouse models of prion infection.
- Analyzing brain tissue for protease-resistant prion protein accumulation.
- Assessing potential neurotoxic factors secreted by B cells.
Main Results:
- B-cell deficient mice exhibit accumulation of protease-resistant prion protein in the brain, indicating subclinical infection.
- The study characterized the pathological features of this asymptomatic prion state.
- Evidence was gathered regarding the potential contribution of B-cell derived factors to disease progression.
Conclusions:
- B-cell deficiency can lead to a subclinical form of transmissible spongiform encephalopathy, with prion protein accumulation.
- Further research is needed to elucidate the precise mechanisms of B-cell involvement and potential neurotoxicity in prion diseases.