Single layer centrifugation of stallion spermatozoa through Androcoll™-E does not adversely affect their capacitation-like status, as measured by CTC staining.

The research explores the impact of single layer centrifugation (SLC) and subsequent cold storage on the capacitation-like status of stallion sperm, finding no adverse effects and confirming its viability for storage and preservation uses.

Research Design and Methodology

• The authors aim to establish how SLC and subsequent cold storage affect stallion spermatozoa.
• Involving three stallions for the study, three ejaculates per stallion were used producing nine samples overall.
• The samples were examined at regular intervals after collection, extension, and SLC, specifically at 4, 24 and 72 hours.
• The temperature for storage was kept constant at 6 degrees Celsius.

Research Findings

• The researchers measured the capacitation-like status of the spermatozoa using chlortetracycline (CTC), a fluorescent dye.
• The findings showed no discernable difference in capacitation-like-status between colloid-selected and non-selected spermatozoa, confirming that the SLC process did not hinder the spermatozoa’s adaptation capability to fertilize an egg.
• There was a significant decrease in sperm motility during cold storage, but this did not appear to influence their capacitation-like status.
• The proportion of spermatozoa that could go through capacitation increased over time, even as they were stored in cold temperatures. However, the number of acrosome-reacted spermatozoa remained constant.

Conclusion

• The study concludes that SLC, coupled with Androcoll-E, doesn’t negatively impact the capacitation-like status of stallion spermatozoa. This could imply it’s a safe method to select and store spermatozoa for artificial insemination or other fertility treatments.
• Even though motility reduced during cold storage, the proportion of spermatozoa capable of capacitation increased over time indicating that the process could potentially enhance the fertility of cold-stored spermatozoa.
• The research implies SLC could be a viable technique used in the preservation and storage of stallion sperm without compromising the biological properties needed for successful fertilization.