Effects of etiocholanolone and prednisolone on intravascular granulocyte kinetics in horses.

This research studies the influences of substances etiocholanolone and prednisolone on the blood granulocyte count and granulocyte marrow reserve (MGR) in horses. The outcomes show that prednisolone is effective in rapidly mobilizing MGR and reducing the granulocyte specific activity in the blood, while etiocholanolone does not demonstrate these effects.

Research Methodology

• The study was conducted on four adult horses.
• To study granulocyte kinetics, 51Cr-labeled leukocytes were utilized.
• Two agents, etiocholanolone (administered in 0.3 mg/kg dosage) and prednisolone (administered in 200 mg dosage), were used to examine their effects on the MGR in these horses.

Findings

• The mean increase in peripheral granulocyte count following etiocholanolone administration was 870 granulocytes/mm3 while prednisolone administration lead to a mean increase of 5,880 granulocytes/mm3.
• Etiocholanolone didn’t show a successful mobilization of the MGR and in fact reduced the rate of granulocyte egress (exit) from the blood, implying that it had a non-optimal effect on granulocyte levels.
• Prednisolone, on the other hand, effectively mobilized the MGR, thus promoting the availability of granulocytes in the bloodstream.
• Additionally, prednisolone decreased granulocyte specific activity during the initial three hours after injection, demonstrating its capacity to alter granulocyte behaviour more rapidly and effectively than etiocholanolone.

Key Takeaway

• This research puts forth important insight into how different substances can influence granulocyte kinetics in horses, with prednisolone being identified as an effective agent for mobilizing MGR and reducing granulocyte specific activity in the blood stream.