Effects of a Phytogenic Supplement Containing Olive By-Product and Green Tea Extracts on Growth Performance, Lipid Metabolism, and Hepatic Antioxidant Capacity in Largemouth Bass (Micropterus salmoides) Fed a High Soybean Meal Diet

被引:17
作者
Liu, Jiacheng [1 ]
Xue, Min [1 ]
Morais, Sofia [2 ]
He, Maolong [3 ]
Wang, Hao [1 ]
Wang, Jie [1 ]
Pastor, Jose J. [2 ]
Goncalves, Rui A. [2 ]
Liang, Xiaofang [1 ,4 ]
机构
[1] Chinese Acad Agr Sci, Inst Feed Res, Natl Aquafeed Safety Assessment Ctr, Beijing 100081, Peoples R China
[2] Lucta SA, Innovat Div, Anim Sci Unit, Bellaterra 08193, Spain
[3] Lucta Guangzhou Flavours Co Ltd, Innovat Div, Guangzhou 510530, Peoples R China
[4] Chinese Acad Agr Sci, Inst Feed Res, Feed Proc & Qual Control Innovat Team, Beijing 100081, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
largemouth bass; soybean meal; phytogenic feed additive; antioxidant capacity; lipid metabolism; FISH-MEAL; CAMELLIA-SINENSIS; BODY-COMPOSITION; INTESTINAL MICROBIOTA; BLOOD-CHEMISTRY; EXPRESSION; L; REPLACEMENT; RESPONSES; GENES;
D O I
10.3390/antiox11122415
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
A 10-week growth trial was conducted to investigate the effects of a phytogenic feed additive (PFA) containing olive by-products and green tea extracts supplemented to a reduced fishmeal/high soybean meal diet on the growth performance, hepatic antioxidant capacity, lipid metabolism, and liver health of largemouth bass (Micropterus salmoides). Three experimental diets were tested: (1) a control high fishmeal (40%) and low soybean meal (15.57%) diet (named HFM), (2) a reduced fishmeal (30%) and high soybean meal (30.97%) diet (named HSB), and (3) a HSB diet supplemented with the PFA at 500 mg/kg (named HSB+P). Each diet was assigned to four replicate tanks, each containing 30 largemouth bass (initial body weight, IBW = 48.33 +/- 0.01 g). The results showed that increasing the soybean meal content in the diet did not negatively affect growth performance, whereas supplementation with PFA significantly increased weight gain and specific growth rate of largemouth bass compared to both HFM and HSB groups. Reducing fishmeal and increasing soybean meal in the diet caused oxidative stress with a higher content of ROS in the liver. However, the hepatic antioxidant capacity was enhanced, with reduced ROS and increased GSH-Px levels in the HSB+P group. Moreover, the decrease of plasma TG, LDL-C, and LDL-C/TC, and downregulation of lipogenesis and cholesterol synthesis gene expression in liver, indicated that supplementation with the PFA improved fish lipid metabolism. Protein retention efficiency was also significantly increased in largemouth bass fed the diet with PFA supplementation, which regulated (enhanced) AKT-mTOR phosphorylation. These results clearly indicated that a PFA containing olive by-product and green tea extracts can positively improve growth performance, protein retention efficiency, antioxidant capacity, and lipid metabolism of largemouth bass fed a reduced fishmeal/high soybean meal diet.
引用
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页数:15
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