Abstract
Seminal oxidative stress status is emerging as a significant prognostic tool in assisted reproductive technology. A dynamic interplay between pro- and anti-antioxidant substances in the ejaculate is essential. In this study, we determined seasonal changes in the activity of the antioxidant enzyme defence system comprising catalase (CAT), glutathione peroxidase (GPx) and superoxide dismutase (SOD) in seminal plasma (SP) of mature Holstein bull’s semen. Samples were collected by a bovine artificial vagina from 30 sexually mature Holstein bulls, and CAT, GPx and SOD activities were determined for different seasons. The CAT enzymatic activity determined in SP was greater in autumn as compared with other seasons (P < 0.01). Significantly lower GPx activity was found in winter compared with other seasons (62 ± 12 versus 133 ± 35; P < 0.01). However, SOD was not significantly affected by the season. The results reported confirm the influence of season on sperm quality. Furthermore, this study presents convincing evidence that SP composition is important in determining the antioxidant defence system of ejaculated spermatozoa.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
