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Effects of icariin as a feed additive on the reproductive function in bucks (Capra hircus)

文献类型： 外文期刊

作者： Zhao, Fang-e 1 ; Chen, Hong 1 ; Wang, Shuo 1 ; Zhang, Xinge 1 ; Chen, Na 1 ; Chen, Hongbo 1 ; Fu, Jie 1 ; Liu, Hailong 2 ; Liu, Jun 1 ; Liu, Tengfei 1 ;

作者机构： 1.Northwest A&F Univ, Coll Vet Med, Yangling, Peoples R China

2.Hainan Acad Agr Sci, Inst Anim Sci & Vet Med, Haikou, Peoples R China

关键词： icariin; testes; spermatogenesis; testosterone; dairy goat

期刊名称：FRONTIERS IN VETERINARY SCIENCE （ 影响因子：2.9； 五年影响因子：3.3 ）

ISSN：

年卷期： 2024 年 11 卷

页码：

收录情况： SCI

摘要： Improving the reproductive ability and fertility of male ruminants is a central concern in animal husbandry. Phytogenic feed additives, known for their anti-inflammatory, antioxidant, and immunomodulatory properties, are commonly used in animal feed. Icariin (ICA), the primary flavonoid glucoside derived from Epimedium, is a traditional tonic in Chinese herbal medicine. However, its potential to enhance the reproductive performance of male ruminants remains unclear. In this study, twelve healthy adult male dairy goats were divided into two groups. The goats received oral administration of ICA at doses of 0 (control) and 50 mg/kg body weight daily for a consecutive period of 80 days during the breeding season. The effects of ICA on the reproductive performance was analyzed by histological examinations, semen quality analysis, and ELISA experiments. ELISA results showed a progressive increase in serum levels of GnIH, LH, and testosterone with the prolonged ICA treatment (p < 0.05). However, the serum concentration of GnRH in the ICA group initially increased, followed by a subsequent decrease (p < 0.05). The hypothalamic concentrations of dopamine (DA) and 5-hydroxytryptamine (5-HT) were significantly higher in the ICA group compared to the control group (p < 0.01). The CASA system analyzed sperm kinematics and revealed that ICA increased ejaculate volume, with both total motile and progressive motile sperm gradually increasing over time (p < 0.05). ICA did not affect the body weight of the goats but significantly increased the organ coefficient of the testes (p < 0.01). Additionally, there was an upregulation of hormone receptor expression in testicular tissue and an improvement in the antioxidant capacity of the testes after ICA treatment (p < 0.01). Furthermore, ICA was implicated in testosterone synthesis by modulating the expression of key enzymes associated with steroidogenesis and promoting the differentiation of spermatogonial stem cell to enhance spermatogenesis. In conclusion, our results indicate that icariin, as a phytogenic feed additive incorporated into the diet of ruminants, offers potential benefits in improving the reproductive performance of male dairy goats.

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