An enzyme immunoassay (EIA) for progesterone in horse plasma.

This research presents a new and easy technique to measure progesterone levels in horse plasma using Enzyme Immunoassay (EIA).

Research Procedure

• The researchers created an Enzyme Immunoassay (EIA) to measure the concentration of progesterone. Progesterone is a hormone in horses and the understanding of its levels is crucial for several biological and veterinary purposes, including horse breeding.
• An enzyme-coupled antigen, which refers to a substance that causes an immune response, known as 11-OH-hemisuccinyl-beta-D-galactosidase was used in this procedure.
• Methylumbelliferyl-beta-D-galactoside was employed as a substrate, which is the molecule upon which an enzyme reacts.
• Polyclonal antibodies against 11-OH-hemisuccinate-BSA, which the immune system produces to neutralize a variety of pathogens, were attached to polystyrene tubes to capture the hormone in question within the horse plasma.

Research Findings

• The novel assay demonstrated that it could detect progesterone concentrations as low as 0.156 ng/ml of plasma, or in amounts of 93 pg per test tube, validating the assay’s sensitivity.
• To ascertain accuracy, researchers used Probit analysis which shows a mathematical relationship between the intensity of a stimulus and the occurrence of an event. The analysis showed a linear correlation between the logarithm of concentration and the binding percentage, confirming the reliability of the new technique.

Research Comparison and Conclusion

• To evaluate the newly developed EIA’s performance, it was compared to a well-established method, the radioimmunoassay (RIA). The comparison indicated a strong correlation with a correlation coefficient of 0.81, unveiling the significant compatibility of the new EIA with an existing reliable method.
• The successful results of this study suggest that this new, simpler Enzyme Immunoassay (EIA) has ample sensitivity to accurately estimate progesterone levels in horse plasma, providing a potentially easier, faster, and potentially less costly alternative to obtaining this important information.