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An ELISA for PGE2 utilizing monoclonal antibody
R G Neuman1, J H Korn, E T Lally
1Ayerst Laboratories Research, Inc., Department of Immunology, Princeton, NJ 08543.
Journal of Immunoassay
|January 1, 1988
Summary
A new enzyme-linked immunosorbent assay (ELISA) accurately measures prostaglandin E2 (PGE2) levels. This cost-effective and rapid method offers an alternative to radioimmunoassay (RIA) for analyzing biological samples.
Area of Science:
- Biochemistry
- Immunology
- Analytical Chemistry
Background:
- Prostaglandin E2 (PGE2) is a crucial lipid mediator involved in various physiological and pathological processes.
- Accurate quantification of PGE2 is essential for understanding its role in inflammation, pain, and other biological functions.
- Existing methods like radioimmunoassay (RIA) can be time-consuming, expensive, and generate hazardous waste.
Purpose of the Study:
- To develop and validate a sensitive and specific enzyme-linked immunosorbent assay (ELISA) for the quantification of Prostaglandin E2 (PGE2).
- To provide a cost-effective, rapid, and environmentally friendly alternative to traditional RIA methods for PGE2 measurement.
- To assess the cross-reactivity of the developed ELISA with other related prostanoids and fatty acids.
Main Methods:
- Development of a competitive binding ELISA using mouse monoclonal anti-PGE2 ascites.
- Immobilization of a PGE2-bovine serum albumin (PGE2-BSA) conjugate on a solid phase.
- Colorimetric detection of bound antibody using alkaline phosphatase-conjugated goat anti-mouse IgG and p-nitrophenyl phosphate substrate.
- Evaluation of specificity through cross-reactivity testing with various prostanoids and arachidonic acid derivatives.
Main Results:
- The developed ELISA demonstrates high sensitivity, detecting PGE2 concentrations from 0.5 to 20.0 ng/ml.
- Minimal cross-reactivity was observed with structurally similar molecules including PGE1, PGA1, PGA2, PGB2, 6-keto-PGF1α, PGF2α, 13,14-dihydro-15-keto-PGE2, thromboxane B2, and arachidonic acid.
- The ELISA allows for rapid data collection and analysis, with processing times under 10 minutes per 96-well plate when integrated with appropriate software.
- The assay eliminates the radioactive and toxic chemical waste associated with RIA methods.
Conclusions:
- The developed PGE2 ELISA is a sensitive, specific, and efficient tool for the quantitative analysis of PGE2.
- This ELISA offers a significant advantage over RIA in terms of cost, speed, and environmental impact.
- The assay is suitable for high-throughput analysis of large sample numbers, facilitating research in prostaglandin-related fields.