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Updated: Jul 28, 2026
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Monitoring Immune Cells Trafficking Fluorescent Prion Rods Hours after Intraperitoneal Infection
Published on: November 19, 2010
CD4+ T cell-mediated immunity against prion proteins.
1Institute for Cell Biology, Department of Immunology, University of Tübingen, Auf der Morgenstelle 15, 72076 Tübingen, Germany. l.stoltze@prion.ucl.ac.uk
Cellular and Molecular Life Sciences : CMLS
|May 10, 2003
Summary
The prion protein (PrP) influences susceptibility to prion diseases. Differences in PrP amino acid sequences trigger CD4+ T cell responses, crucial for distinguishing foreign from self PrP and overcoming the species barrier.
Area of Science:
- Neuroscience
- Immunology
- Molecular Biology
Background:
- The prion protein (PrP(C)) is central to transmissible spongiform encephalopathies.
- The 'protein only' hypothesis posits prions (PrP(Sc) conformer) as the infectious agent.
- A 'species barrier' hinders prion transmission due to PrP sequence variations.
Purpose of the Study:
- To investigate the immunological basis of the prion disease species barrier.
- To determine how PrP sequence differences influence immune recognition.
Main Methods:
- Analysis of prion protein (PrP) peptide presentation on major histocompatibility complex class II molecules.
- Assessment of CD4+ T cell activation in response to foreign PrP peptides.
- Monitoring antibody production as an indicator of immune response.
Main Results:
- PrP sequence variations lead to distinct peptide presentation on MHC class II molecules.
- These peptides activate specific CD4+ T cells.
- This T cell activation induces an effective immune response, including antibody production against foreign PrP.
Conclusions:
- CD4+ T cells play a critical role in distinguishing foreign from self PrP.
- Immune responses mediated by CD4+ T cells are key to overcoming the prion species barrier.
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