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A noncompetitive enzyme immunoassay for rat prolactin
V Tavernier1, J P Thénot, M Parrod
1Synthelabo Recherche (L.E.R.S.), Département de développement chimique et pharmaceutique, Chilly Mazarin, France.
Journal of Immunoassay
|February 1, 1995
Summary
A novel enzyme immunoassay (EIA) offers a sensitive and specific method for quantifying rat prolactin (rPRL). This rapid assay provides accurate rPRL measurements in various biological samples, making it a valuable tool for research.
Area of Science:
- Endocrinology
- Biochemistry
- Assay Development
Background:
- Rat prolactin (rPRL) plays a crucial role in various physiological processes.
- Accurate quantification of rPRL is essential for understanding its functions and associated conditions.
- Existing methods for rPRL measurement may have limitations in sensitivity, specificity, or practicality.
Purpose of the Study:
- To develop and validate a sensitive and specific noncompetitive enzyme immunoassay (EIA) for rat prolactin (rPRL).
- To establish the performance characteristics of the developed rPRL EIA, including sensitivity, specificity, and precision.
- To compare the developed EIA with existing radioimmunoassay (RIA) methods for rPRL quantification.
Main Methods:
- A noncompetitive enzyme immunoassay (EIA) was developed using rabbit anti-rPRL antibody.
- The antibody was immobilized on microtiter plates and conjugated to peroxidase as a tracer.
- Rat prolactin (rPRL) was quantified by sandwiching it between the antibody and the tracer, with enzymatic activity proportional to rPRL concentration.
Main Results:
- The rPRL EIA demonstrated high specificity for rat prolactin.
- Sensitivity was determined to be 12.5 pg/well (0.125 ng/ml) of NIH-RP2 equivalents.
- The assay showed excellent precision with intra- and inter-assay coefficients of variation less than 10% for rPRL concentrations ranging from 0.25-40 ng/ml.
- The EIA could accurately quantify rPRL in biological samples containing up to 25% plasma.
- A strong correlation (r = 0.984) was observed when comparing the EIA results with radioimmunoassay (RIA).
- Assay results were obtained rapidly, within 4.5 to 18.5 hours depending on the sample type.
Conclusions:
- The developed enzyme immunoassay is a sensitive, specific, and rapid method for quantifying rat prolactin (rPRL).
- This assay is suitable for measuring rPRL in various biological matrices, including those with plasma.
- The cost-effective and stable tracer further enhances the assay's utility as a valuable tool for rPRL measurement in research settings.