A new approach to quantification of Sertoli cells that avoids problems associated with the irregular nuclear surface

Area of Science:

• Reproductive Biology
• Animal Science
• Histology

Background:

• Accurate quantification of Sertoli cells is crucial for understanding testicular function and male fertility.
• Previous methods for Sertoli cell enumeration may have limitations in accuracy or applicability.

Purpose of the Study:

• To introduce and validate a new method for quantifying Sertoli cells in stallion testes.
• To compare Sertoli cell numbers between breeding and non-breeding seasons in stallions.

Main Methods:

• A new quantification approach was developed using spermatid counts per testis, spermatids per Sertoli cell apex, and spermatid lifespan correction.
• Testes from adult stallions were analyzed during both the non-breeding and breeding seasons.
• The new method's results were cross-verified with established ratios and absolute values from other techniques.

Main Results:

• The number of Sertoli cells per gram of testicular parenchyma remained consistent between seasons.
• A significant increase in the total number of Sertoli cells per testis was observed during the breeding season.
• The new method demonstrated consistency with other established techniques, confirming its validity.

Conclusions:

• The novel quantification method provides a reliable approach to determine Sertoli cell numbers in stallion testes.
• Seasonal variations significantly impact the total number of Sertoli cells per testis, highlighting the influence of reproductive status.
• This method offers a valuable tool for research in equine reproductive physiology and endocrinology.