Total plasma corticosteroid concentrations in horses with combined immunodeficiency.

This research investigates the plasma corticosteroid concentrations in Arabian foals with combined immunodeficiency (CID) and their mothers during pregnancy, and finds no significant differences when compared with healthy foals and their mothers.

Study Design and Participants

• The study involved 30 Arabian mares and their foals divided into different groups. There were seven foals with combined immunodeficiency (CID) and five without CID. The mare groups included ten mares that were pregnant with CID foals, 20 mares pregnant with non-CID foals, and 5 non-pregnant mares, all heterozygous for the CID trait.

Method of Data Collection

• The researchers took measurements of plasma corticosteroid concentrations – hormones that play a crucial role in processes such as immune response and regulation of inflammation. The concentrations were quantified at various stages of gestation for the pregnant mares and compared across the different groups.

Main Findings

• CID foals had an average plasma corticosteroid concentration of 34.4 +/- 5.2 ng/ml, and the non-CID foals had a concentration of 37.6 +/- 8.4 ng/ml. This difference was not significant, suggesting that CID does not impact the corticosteroid concentration in foals.
• Mares pregnant with CID foals had a concentration of 61.5 +/- 16.4 ng/ml, and those carrying non-CID foals had a concentration of 61.5 +/- 12.8 ng/ml. Similarly, there was no significant difference between these groups, implying that the foal’s health status (CID or non-CID) does not influence the mare’s corticosteroid levels during pregnancy.
• Comparing pregnant and non-pregnant mares revealed no significant difference in corticosteroid concentrations as well. The non-pregnant mares had a corticosteroid concentration of 77.9 +/- 10.7 ng/ml.

Based on these findings, the researchers concluded that combined immunodeficiency in Arabian foals and their gestational status did not significantly impact plasma corticosteroid concentrations.