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In vitro interaction between oviduct epithelial and equine sperm
J E Ellington1, G G Ignotz, D D Varner
1Department of Clinical Sciences, Cornell University, Ithaca, New York.
Archives of Andrology
|September 1, 1993
Summary
Stallion sperm attach to equine oviductal epithelial cells (OEC) in vitro, maintaining motility for days. OEC-conditioned media induce capacitation-like changes in sperm, similar to heparin.
Area of Science:
- Reproductive Biology
- Sperm Physiology
- Equine Reproduction
Background:
- Understanding stallion sperm-oviduct interactions is crucial for equine reproductive technologies.
- Equine oviductal epithelial cells (OEC) may play a role in sperm capacitation and storage.
Purpose of the Study:
- To evaluate the interaction between stallion sperm and in vitro-cultured equine oviductal epithelial cells (OEC).
- To investigate the effect of OEC and OEC-conditioned medium on sperm capacitation and viability.
Main Methods:
- Coculture of frozen-thawed OEC monolayers with stallion sperm.
- Assessment of sperm attachment, motility, and viability using microscopy and staining techniques (chlortetracycline, Hoechst 33258).
- Incubation of sperm with control, heparinized, or OEC-conditioned medium.
Main Results:
- Live stallion sperm attached to OEC monolayers in vitro, exhibiting flagellar motion for up to 4 days.
- Scanning electron microscopy revealed intimate associations between sperm and OEC.
- OEC-conditioned medium induced capacitation-like changes in sperm, comparable to heparin, without significantly affecting viability.
Conclusions:
- Equine oviductal epithelial cells provide a supportive environment for stallion sperm in vitro.
- OEC-conditioned medium can promote sperm capacitation, suggesting a role for oviductal factors in fertility.