In Vitro Effects of Melatonin on Hyaluronidase Activity and Sperm Motility in Bull Semen

Authors : Sadettin TANYILDIZI, Tanzer BOZKURT, Osman ÇİFTÇİ, Fatih SAKİN

Pages : 89-93

View : 24 | Download : 5

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The effects of melatonin on hyaluronidase activity of semen and spermatozoa motility of Holstein bulls were investigation in vitro. Semen samples were divided into 5 equal parts and incubated insert ignore into journalissuearticles values(v/v); with melatonin at the doses of 0.5, 1, 2 and 4 mM for 60 min. Percentages of spermatozoa motility, morphological abnormality and hyaluronidase activity of semen were determined at 5, 10, 15, 20, 30 and 60 min during incubation. Results show that melatonin caused a significant insert ignore into journalissuearticles values(P < 0.001); decrease in the spermatozoa motility, while causing a significant increase in the hyaluronidase activities of the semen. However, there was no significant difference in the percentages of abnormal spermatozoa when compared with control samples. Doses of 0.5, 1, 2 and 4 mM of melatonin in bull semen decreased the percentage of spermatozoa motility in a time- and dose-dependent manner. The mean percentages of abnormal spermatozoa were not affected by melatonin treatment. However, it caused an increased hyaluronidase activity of bull semen. In conclusion, the existence of melatonin in bull semen has a significant effect on fertilization ability by affecting spermatozoa motility and hyaluronidase activity.
Keywords : Bull spermatozoa, semen, melatonin, hyaluronidase