Effect of clenbuterol on the clearance of particles of charcoal (4 to 90 microm) from the uteri of mares.

The research paper investigates the effect of the drug clenbuterol on the ability of healthy mares to clear particles of charcoal from their uteri. The study’s results indicate clenbuterol significantly affects fluid volume and the rate at which particles are cleared, suggesting potential for its use in managing fertility issues in mares resulting from persistent inflammation.

Research Objective and Methodology

• This study aimed to understand the effect of beta2-adrenergic agonist, specifically clenbuterol, to enhance the particle clearance mechanism in the uterus of a mare. This acts as a potential solution to persistent inflammation, which is a serious fertility issue.
• The researchers chose 18 mares as the subjects of their study, out of which, three were susceptible to endometritis, and four were ovariectomised. The mares were subjected to a charcoal clearance test that involved filling the uterus with 500 mg of charcoal (with particle size ranging between 4 to 90 microm), diluted with 50 ml of Phosphate-Buffered Saline (PBS).
• After 48 hours, the uteri were flushed using a solution of methylene blue in 50 ml of PBS. The diluting factor was determined by photospectrometry.

Treatment with Clenbuterol

• Out of the total subjects, four mares with suitable charcoal clearance were chosen for further investigation. The researchers administered 0.8 microg/kg of clenbuterol intravenously every 12 hours and 1 microg/kg every eight hours. The mares were again subjected to charcoal clearance testing post-treatment.
• The parameters scrutinized in this scenario included the flush volume, pH, specific gravity, and pellet size.

Findings and Conclusions

• All the parameters evaluated, remained within their normal range post clenbuterol treatment. However, the researchers did record minimal but significant differences in fluid volume and extinction rate (rate of particle clearance).
• The results hint at the potential role of clenbuterol in enhancing uterine particle clearance in healthy mares, which could evolve as a novel method to address fertility issues related to persistent inflammation.