Related Experiment Video
Updated: Jul 13, 2026
12:01
Detection of Disease-associated α-synuclein by Enhanced ELISA in the Brain of Transgenic Mice Overexpressing Human A53T Mutated α-synuclein
Published on: May 30, 2015
Improved conformation-dependent immunoassay: suitability for human prion detection with enhanced sensitivity
A Bellon1, W Seyfert-Brandt1, W Lang1
1Virology, Aventis Behring GmbH, PO Box 1230, 35002 Marburg, Germany.
The Journal of General Virology
|June 18, 2003
Summary
A new in vitro assay, sandwich conformation-dependent immunoassay (CDI), detects pathogenic prions (PrPSc) in bodily fluids with high sensitivity. This powerful tool enhances prion disease diagnostics, offering results in under 24 hours.
Area of Science:
- Neuroscience
- Biochemistry
- Medical Diagnostics
Background:
- Pathogenic prion protein (PrPSc) presence in lymphoid tissues of variant Creutzfeldt-Jakob disease (vCJD) patients suggests potential presence in bodily fluids.
- Transgenic mice are sensitive in vivo tools for prion detection, but in vitro methods are needed for broader application.
Purpose of the Study:
- To develop a highly sensitive in vitro assay for detecting prions in bodily fluids.
- To improve upon existing conformation-dependent immunoassay (CDI) methods for prion detection.
Main Methods:
- Development of a sandwich conformation-dependent immunoassay (CDI) incorporating a capture antibody.
- Testing the assay's sensitivity and ability to detect prions with varying biophysical properties in spiked plasma samples.
- Comparison of the sandwich CDI sensitivity with the original direct CDI.
Main Results:
- The sandwich CDI demonstrated a 30- to 100-fold increase in sensitivity compared to the direct CDI.
- The assay detected vCJD prions in plasma with different biophysical properties, even without proteinase K pretreatment.
- The assay achieved high sensitivity for prion detection in bodily fluid samples.
Conclusions:
- Sandwich CDI is a powerful and highly sensitive in vitro tool for studying prions in bodily fluids of CJD/vCJD patients.
- This assay offers a rapid diagnostic potential with a turnaround time of less than 24 hours.
- The method advances prion disease research and diagnostics, particularly for bodily fluid analysis.
