Development of lymphocyte blastogenic response in the neonatal period of foals.

This research article explores the immune response in newborn foals by studying their lymphocyte activity and cortisol levels during the first weeks of life. It reveals a correlation between high birth cortisol levels and a decreased initial immune response.

Research Objective

• The study aimed to investigate the development of the lymphocyte blastogenic response (i.e., the ability of lymphocytes, a type of white blood cell, to multiply in response to an antigen) during the neonatal period of foals. The researchers also tracked changes in serum cortisol levels, a hormone linked with stress and immune response, during this period.

Methods and Samples

• The research was conducted on eighteen newborn foals. Their lymphocyte blastogenic responses and serum cortisol levels were measured and evaluated during various stages of the neonatal period.
• The results of the blastogenic responses were represented by a stimulation index (SI), which is a numerical expression of the growth rate of lymphocytes in response to specific stimulants, known as mitogens.

Findings

• The research found that the lymphocyte’s blastogenic response to three specific mitogens was lowest at birth, then increased gradually post-birth with slight variations.
• The serum cortisol level was highest at birth, decreasing rapidly within the first week before stabilizing.

Conclusion and Implications

• The results suggest a potential correlation between the high cortisol levels present at birth and the decreased initial blastogenic response of lymphocytes. This implies that the neonatal immune response may be influenced by the foal’s hormonal state at birth.
• This understanding could be crucial for developing interventions that help boost the immunity of newborn foals, protecting them against possible infections during their early weeks of life.