Measurement of progesterone in sheep using a commercial ELISA kit for human plasma

Author:

Pasciu Valeria1ORCID,Nieddu Maria2,Baralla Elena1,Porcu Cristian1,Sotgiu Francesca1,Berlinguer Fiammetta1

Affiliation:

1. Departments of Veterinary Medicine, University of Sassari, Sassari, Italy

2. Chemistry and Pharmacy, University of Sassari, Sassari, Italy

Abstract

Determination of serum or plasma progesterone (P4) concentrations is important to recognize pregnant and non-pregnant ewes, and also to predict the number of carried lambs. The 2 most common methodologies for the detection of plasma P4 are radioimmunoassay (RIA) and enzyme immunoassay (EIA). RIA is very expensive, and not all laboratories are equipped to perform this test; EIA is commercially available for human use, but only a few companies produce species-specific kits, which are expensive. We verified for ovine plasma a less expensive and easily available ELISA kit (DiaMetra) designed to quantify P4 in humans. Pools of ovine and human plasma were used to compare repeatability, accuracy, sensitivity, and stability of P4 measured by the DiaMetra kit. Repeatability data were within 15%, and accuracy values were ~90% for both plasma matrices. Stability data showed a loss of <20% for freeze–thaw and <30% for 30-d storage. All parameters were acceptable under international guidelines for method validation. The human ELISA kit was used successfully to quantify plasma P4 in 26 ewes during pregnancy until delivery. P4 concentrations were also correlated with the number of carried lambs.

Funder

Regione Autonoma della Sardegna

Publisher

SAGE Publications

Subject

General Veterinary

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