An enzyme-linked immunosorbent assay for rat prolactin

Area of Science:

• Endocrinology
• Immunology
• Assay Development

Background:

• Rat prolactin is a crucial hormone regulating various physiological processes.
• Existing radioimmunoassays for rat prolactin have limitations, including the need for radioactive isotopes and specialized equipment.
• A need exists for a sensitive, specific, and accessible assay for rat prolactin quantification.

Purpose of the Study:

• To develop and validate a sensitive and specific competitive enzyme-linked immunosorbent assay (ELISA) for the quantification of rat prolactin.
• To optimize assay parameters for improved performance and efficiency.
• To evaluate the ELISA as a viable alternative to traditional radioimmunoassays.

Main Methods:

• Development of a competitive enzyme-linked immunosorbent assay (ELISA) using reagents from the National Institute of Arthritis, Diabetes, Digestive Diseases and Kidney.
• Optimization of assay parameters, including reagent concentrations and reaction kinetics.
• Detection and quantification using goat anti-rabbit immunoglobulin G conjugated to horseradish peroxidase.

Main Results:

• The developed ELISA demonstrated high sensitivity, with a detection range of 0.06 to 6 ng.
• Intra-assay coefficient of variation (CV) was 4.2% and inter-assay CV was 7.6% at 0.6 ng.
• The ELISA showed a strong correlation (0.868) with radioimmunoassay results.
• The assay can be completed within 24 hours.

Conclusions:

• The developed competitive ELISA is a sensitive, specific, and reliable method for quantifying rat prolactin.
• This assay serves as a practical and advantageous alternative to radioimmunoassays, especially when radioactive labeling facilities are limited.
• The assay's efficiency and performance make it a valuable tool for research involving rat prolactin.