Abstract
Surface plasmon resonance was used to develop a rapid, label-free and sensitive immunoassay for detection of Prion protein (PrP). Anti-PrP monoclonal antibodies immobilized on the biosensor surface were allowed to bind various concentrations of cellular prion protein (PrPC), followed by a pulse with additional soluble anti-PrP polyclonal antibodies to intensify the signal. The interaction of antibody with antigen was monitored in real time. With this method, it was possible to detect PrPC with a limit of 31.7 ng/ml in serum and 13.1 ng/ml in HEPES-saline, requiring 1 h for a single sample measurement. The assay also detected misfolded prion protein (PrPSc) in spiked serum and PrPSc in scrapie-infected mouse brains. This is a rapid and sensitive assay for the detection of PrP in serum that could be developed into a platform for a serum-based TSE test.




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- PrP:
-
Prion protein
- PrPC :
-
Cellular prion protein
- PrPSc :
-
Misfolded prion protein
- SPR:
-
Surface plasmon resonance
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Jiayu, W., Xiong, W., Jiping, L. et al. A rapid method for detection of PrP by surface plasmon resonance (SPR). Arch Virol 154, 1901–1908 (2009). https://doi.org/10.1007/s00705-009-0532-4
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DOI: https://doi.org/10.1007/s00705-009-0532-4

