Clearance of infused triglyceride by resting horses.

The study explored how resting horses cleared infused triglycerides, finding that the process is much slower than in other species, which could indicate inefficiencies in metabolizing lipoproteins.

Study Procedures

• The researchers studied six mature resting horses that had eaten a meal of alfalfa hay 2 to 6 hours prior to the experiments.
• The horses were given Intralipid, a 10% triglyceride emulsion, via infusion into the jugular vein. The dosage was calculated at 0.2 ml per kg of the horse’s weight.
• Within an 80 minute window following the infusion, blood samples were taken to determine the concentration of plasma triglycerides. This process helped measure the body’s ability to clear (remove) the infused lipid.

Results

• The mean clearance rate of the infused lipid was found to be extremely slow, with a half-life of approximately 269 minutes. This is the time required for half the infused lipid to be removed from the bloodstream.
• In comparison to other species, the speed at which these horses cleared the infused lipid was notably slower. This suggests potential differences in metabolic processes.

Implications

• The slow clearance of infused triglycerides in horses could indicate an inability to efficiently metabolize lipoproteins. In other words, these horses may struggle to break down these types of fats, which could impact their energy levels and overall health.
• This finding could have implications for equine health and nutrition, and may need to be considered in diet planning for horses. More research is necessary to fully understand the implications of these results.