Modifications of serum and cellular parameters in trotters after a race. Macrophage migration inhibitory activity reduction and serum beta-glucan elevation.

The research article discusses how trotter horses’ physiological changes after a race, including alterations in serum and cellular parameters, can lead to increased susceptibility to diseases. The study found multiple organ dysfunction and a weakened immune response in these horses post-race.

Research Focus and Methodology

• In the study, the researchers focused on understanding the physiological changes that trotters, a type of racehorse, undergo after a race. This was motivated by the known issue of many trotters suffering from lethal lung infections following their races.
• They hypothesized that the physiological stress and continuous strain from training and racing might lead to modifications in certain cellular and serum parameters, which in turn might predispose the horses to such diseases.
• The research was conducted by analyzing changes in several serum values and hematological parameters in seven trotters after a race.

Findings and Implications

• The study found that after a race, certain serum parameters in trotters, such as blood glucose, triglyceride levels, enzyme activities, and protein concentrations, were increased.
• Also, hematological parameters such as red blood cell count, hemoglobin content, and lymphocyte and monocyte count were seen to increase after a race.
• Interestingly, the study observed a decrease in the activity of macrophage migration inhibitory factor in these horses post-race, suggesting an impaired T-lymphocyte response. This impairment likely means a weakened immune response, potentially making these horses more susceptible to infections.
• Additionally, increased levels of circulating beta-glucans, an indicator of fungal cell wall components, were found in some horses after a race. This may suggest reduced clearance of these potential pathogenic agents, and so, a higher risk of fungal infections.
• The researchers concluded that these combined physiological alterations indicate a state of multiple organ dysfunction, including liver, kidney, pancreas, and skeletal muscle, as well as a weakened immune response post-race.