Naslov
Seasonal Variations in Semen Antioxidants of Simmental Bulls

Autori
Shek-Vugrovečki, Ana ; Aladrović, Jasna ; Beer Ljubić, Blanka ; Laškaj, Renata ; Majić-Balić, Ivanka ; Milinković-Tur, Suzana

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
12th Middle European buiatric Congres : Book of proceedings ; u: Veterinarska stanica (2011) (S1) / Kos, Josip ; Samardžija, Marko - Zagreb : Hrvatski veterinarski institut, 2011, 143-148

ISBN
978-953-6062-79-9

Skup
Middle European buiatric Congres (12 ; 2011)

Mjesto i datum
Pula, Hrvatska, 18.05.2011. - 22.05.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
sperma; simentalski bikovi; antioksidansi; godišnje doba
(semen; Simmental bulls; antioxidants; season)

Sažetak
Many environmental and physiological factors induce oxidative stress, thus the objective of the present study was to examine seasonal variations of antioxidant enzymes and lipids oxidation in bull spermatozoa and seminal plasma. Semen was collected by use of sterile artificial vagina from nine breeding Simmental bulls aged between 2.5 and 7.2 years (5.1±0.6 yr ; mean±SE) once in summer and once in winter. In the spermatozoa and seminal plasma activities of total superoxide dismutase (TSOD), glutathione peroxidase (GSH-Px), catalase and lipid peroxides concentrations (LPO) were determined. Spermatozoa TSOD activity in summer was significantly higher from the values recorded in winter (6434±899 U/g protein ; vs. 3839±297 U/g protein). GSH-Px activity (202±19 U/g protein vs. 343±27 U/g protein) and LPO concentration (9.4±2.4 μmol/g lipids vs. 22.0±2.9 μmol/g lipids) in bull spermatozoa were significantly lower in summer as compared with winter values of these parameters. No catalase activity was detected in spermatozoa. Seminal plasma TSOD activity was significantly higher in summer compared with that in winter (2939±171 U/L ; vs. 2381±129 U/L). Activities of GSH-Px and catalase, and LPO concentration in bull seminal plasma showed no significant seasonal variation. In this study, positive correlation was recorded between seminal plasma catalase and TSOD, and activity of catalase was negatively correlated with GSH-Px. Activity of TSOD and pattern of its changes, probably as a result of higher environmental temperatures in summer, might be a good predictive tool for evaluation of semen quality.

Izvorni jezik
Engleski

Znanstvena područja
Veterinarska medicina

POVEZANOST RADA