Morphometry of equine neutrophils isolated at different temperatures.

The research investigates the effect of different temperatures on the structure and characteristics of horse white blood cells, known as neutrophils. The study showed that the isolation procedures at both low and room temperature led to neutrophil degranulation, but without cell swelling. However, cells isolated at room temperature showed more degranulation, and the effect was more pronounced on secondary granules than on primary ones. A specific type of granule, similar to that of immature human neutrophils, was also observed.

Objective of the Research

• The main aim of the study was to examine the impact of different temperatures on the morphological features of equine neutrophils, which are an essential part of the horse’s immune system, their ability to fight infection.

Methodology

• The researchers obtained homogeneous neutrophil samples from peripheral blood at two different temperatures, 4 degrees and 22 degrees Celsius. They achieved this by centrifugation, a process used to separate different components of the blood, on two sequential Ficoll-Hypaque density gradients.
• The ultrastructure and morphometric elements of these neutrophils were subsequently evaluated for any temperature-induced changes.

Findings

• Neutrophil degranulation, which is the release of small molecules to destroy microbes or other foreign substances, occurred at both temperatures. However, no cell bulging or swelling was observed.
• Degranulation was observed to be more prevalent in cells separated at 22 degrees Celsius, which is close to room temperature, suggesting that these cells react more aggressively when exposed to normal environmental conditions.
• The impact of the isolation temperature varied between different granules in the neutrophils. The content of secondary granules showed more variance based on temperature than the primary ones.
• The researchers identified a granule type that was similar to the there immature granules found in human neutrophils.
• Granules with a flocculent matrix were more likely found in cells that were processed at 22 degrees Celsius, and these were thought to be part of the degranulation process.

Significance

• The study contributes valuable insights into understanding the behavior and characteristics of equine neutrophils under different conditions. This could help in creating better diagnostic methods and treatments for diseases where the immune response plays a crucial role.