背景:骆驼是为它们的牛奶而饲养的,肉,羊毛和头发,交通运输,和他们的排泄物作为燃料。驼鹿的季节性繁殖伴随着性活动的变化,形态学,和睾丸的功能。本研究旨在评估在车辙和非车辙季节期间单峰公牛(Camelusdromedarius)睾丸中血清睾酮(T)水平以及总抗氧化能力(TAC)和丙二醛(MDA)水平的季节性波动。此外,还观察了车辙季节对睾丸大小和组织形态的影响。将70头成熟单峰公牛分为车辙组(n=35)和非车辙组(n=35)。从这些公牛身上,在车辙季节(10月至4月)和非车辙季节(5月至9月)从当地屠宰场收集血液样本和睾丸.
结果:在骆驼公牛的车辙和非车辙期间,所有参数都发生了显着变化。睾丸中的TAC水平,车辙组血清T水平明显高于非车辙组(P<0.05)。然而,车辙组睾丸MDA显著低于非车辙组(P<0.05)。TAC与MDA呈负相关(r=-0.59,p<0.01)。此外,在车辙组和非车辙组中,T与TAC水平呈正相关(r=0.66,p<0.0003)。此外,睾丸大小(长度,广度,和厚度)在车辙季节的骆驼明显大于非车辙季节的骆驼。此外,生精小管的数量和直径,精子发生在车辙季节增加,然而,在非车辙季节,胶原蛋白含量和细胞凋亡增加。
结论:这项研究表明,正常繁殖季节(NBS,车辙组)与较高水平的总抗氧化能力(TAC)相关,T,和生精活性,而胶原蛋白含量,MDA(氧化应激因子)和细胞凋亡(氧化应激的结果)的浓度低于低繁殖季节(LBS,非车辙组)。此外,NBS期间,睾丸大小和生精管直径和数量较高。
BACKGROUND: Camels are bred for their milk, meat, wool and hair, transportation, and their excrement as fuel. The seasonal reproduction of camel bull is accompanied by changes in sexual activity, the morphology, and function of the testes. This study aimed to evaluate the seasonal fluctuations in serum testosterone (T) levels as well as total antioxidant capacity (TAC) and malondialdehyde (MDA) levels in the testes of dromedary bulls (Camelus dromedarius) during the rutting and non-rutting seasons. Moreover, the impact of rutting season on the testicular size and histomorphology was also observed. Seventy mature dromedary bulls were divided into a rutting group (n = 35) and a non-rutting group (n = 35). From these bulls, blood samples and testes were collected during the rutting season (October to April) and non-rutting season (May to September) from a local slaughterhouse.
RESULTS: All parameters changed significantly during rutting and non-rutting periods in camel bulls. The levels of TAC in testes, and serum T were significantly (P < 0.05) higher in the rutting group than in the non-rutting group. However, testicular MDA was significantly (P < 0.05) lower in the rutting group than in the non-rutting group. TAC was negatively correlated with MDA (r = -0.59, p < 0.01). Moreover, in the rutting group and the non-rutting group, T was positively correlated with levels of TAC (r = 0.66, p < 0.0003). Additionally, testicular size (length, breadth, and thickness) was significantly greater in camels during the rutting season than in camels during the non-rutting season. Moreover, the number and diameter of seminiferous tubules, and spermatogenesis increased during the rutting season, whereas, the collagen content and apoptosis increased during the non-rutting season.
CONCLUSIONS: This study revealed that the rutting normal breeding season (NBS, rutting group) was associated with higher levels of total antioxidant capacity (TAC), T, and spermatogenic activity while the collagen content, concentrations of MDA (the oxidative stress factor) and apoptosis (an outcome of oxidative stress) were lower than those in the low breeding season (LBS, non-rutting group). In addition, the testicular size and seminiferous tubule diameter and number were higher during the NBS.