Evaluation of Synthetic GnRH-Analog Peforelin with Regard to Oocyte Differentiation and Follicular Development in C57BL/6J Mice.
Authors: Amberger Lena, Wagner Daniel, Höflinger Sonja, Zwicker Frederik, Matzek Dana, Popper Bastian
Journal: Animals : an open access journal from MDPI
Summary
# Editorial Summary Peforelin, a synthetic gonadotropin-releasing hormone analogue, has been evaluated as a potential replacement for pregnant mare serum gonadotropin (PMSG, or equine chorionic gonadotropin) in laboratory ovulation induction protocols—a shift driven by escalating animal welfare concerns and regulatory pressures surrounding PMSG extraction from pregnant mares. Researchers administered peforelin at three different doses or conventional PMSG to prepubescent female mice, with subsequent hCG injection to trigger ovulation, then assessed oocyte yield, fertilisation rates, ovarian histomorphology and follicular maturation across treatment groups. Whilst peforelin-treated mice produced significantly fewer oocytes than the PMSG cohort, fertilisation rates remained comparably high, and ovarian tissue architecture showed no meaningful pathological differences between treatments. These findings demonstrate that peforelin offers sufficient efficacy for superovulation induction in mice and presents a materially more ethical alternative to PMSG extraction, with potential implications for any equine professionals engaged in reproductive research or assisted breeding programmes who may encounter discussions around hormone sourcing and compliance with evolving animal welfare standards.
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Practical Takeaways
- •Not applicable - this is fundamental research in laboratory mice using synthetic hormones, with no direct application to equine practice
- •Not applicable - this study addresses reproductive biotechnology in rodent models, not equine veterinary care
- •Not applicable - findings are specific to mouse ovulation induction protocols and do not translate to equine reproductive management
Key Findings
- •Peforelin at three different concentrations produced significantly fewer oocytes compared to PMSG treatment in C57BL/6J mice
- •Fertilization rates were high in the peforelin cohort despite lower oocyte numbers
- •Ovarian morphology and follicular differentiation were not significantly altered in peforelin-treated mice compared to PMSG controls
- •Peforelin demonstrates suitability as an ethically acceptable alternative to PMSG for superovulation induction in laboratory mice