A comparison of the reduction in immunoglobulin (IgG) concentration of frozen equine plasma treated by three thawing techniques.

The research study is about comparing the reduction of immunoglobulin (IgG) concentration in frozen horse plasma treated with three different thawing techniques.

Objectives of the Study

• The study aimed to determine the impact of three different thawing techniques on the concentration of IgG, an immune protein, in equine plasma.
• The researchers looked to compare these findings with the IgG concentration in fresh plasma to identify the best method for thawing.

Methods Used

• Plasma was obtained from 13 mares and its IgG concentration was measured both when fresh and after being stored at -4 degrees Celsius.
• The stored plasma samples were thawed using three different techniques and their IgG concentration was again measured. The three methods were: slow thawing over 6 hours at 22 degrees Celsius, rapid thawing at 57 degrees Celsius over 50 minutes, and microwaving for 20 to 25 minutes.

Key Findings

• The study found that there was no significant reduction in IgG concentration when the plasma was slowly thawed over 6 hours at 22 degrees Celsius, compared to the fresh sample.
• On the other hand, a significant reduction in IgG concentration was found when the plasma was quickly thawed at 57 degrees Celsius or microwaved for 20 to 25 minutes.
• This suggests that rapid thawing techniques might not be the best method for retaining IgG concentrations.

Implication of the Results

• The results highlight the importance of the method used for thawing plasma, as it directly impacts the IgG concentration, which is crucial for equine health, especially in hypogammaglobulinaemic newborn foals.
• When such plasma is given to hypo-gammaglobulinaemic newborn foals, a larger quantity is required if the plasma has been rapidly thawed rather than slowly thawed or if fresh plasma is used.
• This could impact the treatment approaches used by vets, suggesting that slower thawing is preferable to maintain the important IgG concentrations in stored plasma.