Prion protein-specific antibodies that detect multiple TSE agents with high sensitivity

Area of Science:

• Immunology
• Neuroscience
• Biochemistry

Background:

• Prion diseases, or transmissible spongiform encephalopathies (TSEs), are fatal neurodegenerative disorders.
• Current diagnostic methods for TSEs rely on detecting the misfolded prion protein (PrPSc).
• Development of sensitive and specific antibodies against prion protein (PrP) is crucial for diagnosis and research.

Purpose of the Study:

• To generate and characterize a novel panel of monoclonal antibodies (mAbs) targeting the prion protein (PrP).
• To evaluate the utility of these mAbs in detecting PrP in various species affected by TSEs.
• To assess the potential applications of these mAbs in immunoassays and TSE diagnostics.

Main Methods:

• Generation of mAbs by immunizing PRNP null mice with recombinant ovine prion protein (residues 94-233).
• Epitope mapping using solid-phase Pepscan analysis to identify antibody binding regions.
• Application of mAbs in Western blotting and immunohistochemistry on tissues from TSE-affected species.

Main Results:

• Four distinct epitope clusters were identified within the PrP molecule.
• The novel mAbs demonstrated comparable or superior sensitivity in detection compared to commercially available antibodies.
• Many of the generated mAbs recognize native PrPC, indicating broad applicability.

Conclusions:

• A new panel of anti-prion protein mAbs has been successfully generated and characterized.
• These mAbs offer high sensitivity for detecting PrP in TSE diagnostics and research.
• The antibodies are suitable for various immunoassays, including flow cytometry and immunoprecipitation, aiding TSE pathogenesis studies.