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Effect of dietary n-3 LC-PUFAs on plasma vitellogenin, sex steroids, and ovarian steroidogenesis during vitellogenesis in female silver pomfret (Pampus argenteus) broodstock

文献类型： 外文期刊

作者： Peng, Shiming 1 ; Gao, Quanxin 1 ; Shi, Zhaohong 1 ; Zhang, Chenjie 1 ; Wang, Jiangang 1 ; Yin, Fei 1 ; Zhang, Yanlian 1 ;

作者机构： 1.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China

关键词： Silver pomfret;Broodstock;Vitellogenin;Sex steroids;Steroidogenesis

期刊名称：AQUACULTURE （ 影响因子：4.242； 五年影响因子：4.723 ）

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收录情况： SCI

摘要： We investigated the effects of dietary n-3 LC-PUFAs on plasma vitellogenin (Vtg), sex steroids levels and ovarian steroidogenesis during vitellogenesis in female silver pomfret (Pampus argenteus) broodstock. Broodstock were fed four iso-nitrogenous, iso-energetic, and iso-lipidic experimental diets for 185 d: FO (100% fish oil), FSO (70% fish oil and 30% soybean oil), SFO (30% fish oil and 70% soybean oil), and SO (100% soybean oil) with n-3 LC-PUFA levels of 5.18, 4.01, 3.02, and 2.22%, respectively. The results revealed that plasma FSH levels increased at vitellogenesis (P < 0.05) and slightly decreased at post-vitellogenesis in all four groups. However, plasma LH levels continuously increased during vitellogenesis and significantly increased at post-vitellogenesis (P < 0.05). The FO and FSO groups had significantly higher FSH and LH levels than the SO group at vitellogenesis and post-vitellogenesis. Plasma E2 and T levels continuously increased during vitellogenesis in all four groups. However, the SO group had the lowest plasma E2 and T levels during vitellogenesis. Plasma Vtg levels significantly increased at vitellogenesis and post-vitellogenesis (P < 0.05). FO and FSO had significantly higher Vtg levels than SO (P < 0.05) during vitellogenesis. Cyp19 alpha 1 alpha and era expression levels significantly increased at vitellogenesis and post-vitellogenesis (P < 0.05), with no significant differences between the vitellogenesis and post-vitellogenesis, except in the SO group. Cyp19 alpha 1 alpha and era expression levels decreased in SO at vitellogenesis. In conclusion, dietary n-3 LC-PUFAs affect ovarian steroidogenesis in silver pomfret by altering plasma FSH and LH levels and ovarian Cyp19 alpha 1 alpha gene expression levels during vitellogenesis. High dietary n-3 LC-PUFAs promote ovarian development in silver pomfret, by increasing E2 secretion and Vtg synthesis. (C) 2015 Elsevier B.V. All rights reserved.

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