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Fluorimetric Techniques for the Assessment of Sperm Membranes
Published on: November 28, 2018
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Antisperm antibodies and sperm function in bulls undergoing scrotal insulation
Maria S Ferrer1, Roberto Palomares2, David Hurley2
1Department of Large Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA.
Reproduction (Cambridge, England)
|October 16, 2020
Summary
Scrotal insulation in bulls increased antisperm antibodies (ASAs) and impaired sperm function, leading to teratospermia and asthenospermia. While most bulls recovered, persistent ASAs suggest long-term reproductive immune system effects.
Area of Science:
- Reproductive immunology
- Andrology
- Veterinary science
Background:
- Bovine antisperm antibodies (ASAs) are linked to poor sperm quality.
- The impact of induced scrotal insulation on sperm parameters and immune response is not fully understood.
Purpose of the Study:
- To investigate the hypothesis that scrotal insulation induces ASAs and sperm function deterioration in bulls.
- To evaluate the temporal effects of scrotal insulation on various sperm parameters and reproductive immune markers.
Main Methods:
- Scrotal insulation was applied to 10 bulls for 8 days.
- Semen was collected and analyzed for scrotal circumference, sperm motility, morphology, membrane integrity, acrosome integrity, apoptosis, lipid peroxidation, mitochondrial membrane potential, ASA binding, and DNA integrity over 96 days.
Main Results:
- Scrotal insulation significantly increased IgG- and IgA-bound sperm, correlating with reduced motility and abnormal morphology.
- Deterioration was observed in sperm membrane integrity, acrosome integrity, and mitochondrial membrane potential.
- A decrease in apoptotic cells and lipid peroxidation was noted, with most bulls recovering normospermia by day 96.
Conclusions:
- Scrotal insulation induces ASAs and negatively impacts sperm function in bulls.
- Despite short-term recovery, persistent ASAs and sperm damage suggest long-term effects on reproductive homeostasis.
- This study highlights the sensitivity of the bovine reproductive system to thermal stress.
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