Analysis of peripheral blood chemiluminescence in horses.

This study shows that regular physical training in horses increases their blood’s pro-oxidative potential, as observed in elevated chemiluminescence levels, but there was no significant correlation with the horse’s sex or age.

Research Objective and Design

• The researchers aimed to investigate the chemiluminescence (CL) of peripheral blood, a measure of oxidative stress, in clinically healthy horses of different sexes and ages.
• This involved a series of tests on 119 half-breed horses of various uses, including 66 recreational horses and 53 sport horses, examining their peripheral blood collected under resting conditions or before physical activity.

Methodology and Techniques

• In the blood samples collected, they analyzed both spontaneous and stimulated chemiluminescence using zymosan and phorbol myristate acetate – two substance used to stimulate the release of reactive oxygen species from neutrophils or to incite oxidative stress.
• The researchers then compared the chemiluminescence values between sport and recreational horses, as well as across different sexes and ages.

Findings and Interpretation

• The researchers found that regular training increases the blood’s pro-oxidative potential, as evidenced by the significantly higher chemiluminescence values in sport horses compared to their recreational counterparts.
• However, the researchers didn’t find a statistically significant correlation between the horse’s sex or age and the chemiluminescence values in their peripheral blood.
• Thus, suggesting that other factors such as physical activity levels play a prominent role in oxidative stress levels than age or sex in horses.

Implications and Suggestion

• The researchers propose the need to optimize the results of blood chemiluminescence measurements, taking into account variables such as the number of neutrophils and the concentration of hemoglobin in the blood of tested animals.
• This caution implies that analyzing results of non-optimized blood chemiluminescence measurements, i.e., those done without considering these important blood parameters, could possibly lead to premature or inaccurate conclusions.