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A rapid 'one-plate' in vitro test for pyrogens
Stephen Poole1, Yogesh Mistry, Christine Ball
1National Institute for Biological Standards and Control, Blanche Lane, South Mimms, Potters Bar, Herts EN6 3QG, England, UK. spoole@nibsc.ac.uk
Journal of Immunological Methods
|March 1, 2003
Summary
A novel one-plate test rapidly detects pyrogens in medicines, offering improved sensitivity and speed over traditional methods. This cost-effective assay is suitable for a broad range of products.
Area of Science:
- Biotechnology
- Analytical Chemistry
- Immunology
Background:
- Parenteral medicinal products require rigorous pyrogen testing.
- Conventional two-plate assays for pyrogen detection are time-consuming and less sensitive.
- Endotoxins and other pyrogens can cause adverse reactions in patients.
Purpose of the Study:
- To develop and validate a rapid, one-plate monocyte-activation test for pyrogen detection.
- To improve upon the limit of detection, robustness, speed, and cost of existing pyrogen tests.
- To create a versatile assay applicable to a wide range of pharmaceutical products.
Main Methods:
- Utilized pyrogen-free anti-cytokine antibodies (IL-6 or TNFα) coated onto 96-well plates.
- Co-cultured monocytes/monocytic cells with samples and labeled antibodies for 2-4 hours.
- Completed ELISA after washing, avoiding inter-plate transfers and separate incubations.
Main Results:
- The one-plate test demonstrated superior performance compared to conventional two-plate methods.
- The assay achieved low limits of detection for endotoxins (e.g., 0.015 EU/ml with PBMNC).
- The test is robust, rapid, cost-effective, and amenable to automation.
Conclusions:
- The one-plate monocyte-activation test is a highly efficient method for detecting endotoxins and non-endotoxin pyrogens.
- This assay offers significant advantages for quality control of parenteral medicinal products.
- The test's speed and sensitivity make it a valuable tool for ensuring product safety.