Amyloid A in equine colostrum and early milk.

The study investigates the presence of a protein called Amyloid A3 in horse colostrum and early milk, testing ties to factors like age, breed, length of gestation and induction of parturition. The researchers found that the protein was consistently present in the samples, but bore no relation to its serum concentrations, and was somewhat influenced by longer gestation and induced births.

Research Objective and Hypothesis

The main aim for this study was to explore the presence and concentration of the protein amyloid A3 (AA3) within equine colostrum and early milk. The researchers hypothesized that:

• AA3 would be consistently found in equine colostrum and early milk;
• There would be no correlation between the concentrations of AA3 in serum and colostrum in individual mares at the time of birth;
• The levels of this protein in colostrum/milk might be influenced by the age and breed of the mare, the length of the gestation period, and whether childbirth was induced.

Methodology

The study group covered thirty-eight mares at the period around birth, along with seven other mares that were neither pregnant nor lactating. Researchers measured and compared the serum concentrations of AA3 protein in both pregnant and non-pregnant mares.

Findings

Researchers determined that:

• The concentrations of AA3 protein in the horses’ serum were consistent with previous studies;
• AA3 protein was detected in all samples of colostrum and early milk, showing higher concentrations than those found in the mother’s serum around birth;
• There was no connection between the serum concentrations of Amyloid A protein and colostrum concentrations of AA3 at birth;
• Age and breed of the mare did not have a significant effect on AA3 concentrations;
• Longer gestation lengths and induced births were linked with lower concentrations of colostrum and milk AA3.

Conclusion

The study concluded that AA3 is consistently found in equine colostrum and early milk. The findings suggest that the production of this protein in the mammary gland is likely influenced by different factors compared to the production of serum AA. The presence of this protein in early milk and colostrum could potentially offer protective effects in the newborn horse’s intestine.