Dietary Aloe vera improves plasma lipid profile, antioxidant, and hepatoprotective enzyme activities in GIFT-tilapia (Oreochromis niloticus) after Streptococcus iniae challenge
文献类型: 外文期刊
作者: Gabriel, Ndakalimwe Naftal 1 ; Qiang, Jun 1 ; Ma, Xin Yu 1 ; He, Jie 1 ; Xu, Pao 1 ; Liu, Kai 1 ;
作者机构: 1.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214081, Peoples R China
2.Minist Fisheries & Marine Resources, Directorate Aquaculture, Hardap, Namibia
3.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Minist Agr, China Key Lab Freshwater Fisheries & Germplasm Re, Wuxi 214081, Jiangsu, Peoples R China
4.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, M
关键词: Aloe vera;Antioxidative stress;Aquaculture;Streptococcus;Tilapia
期刊名称:FISH PHYSIOLOGY AND BIOCHEMISTRY ( 影响因子:2.794; 五年影响因子:2.876 )
ISSN:
年卷期:
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收录情况: SCI
摘要: The current study investigated the effects of dietary Aloe vera on plasma lipid profile status, antioxidant, and hepatoprotective enzyme activities of GIFT-tilapia juveniles under Streptococcus iniae challenge. Five dietary groups were designed including a control and 100 % Aloe powder incorporated into a tilapia feed at 0.5, 1, 2, and 4 %/kg feed, which were administered for 8 weeks. Fish fed dietary Aloe at 4 %/kg feed significantly reduced in total cholesterol, while triacylglycerol reduced (P < 0.05) in those fed 0.5, 2, and 4 % Aloe/kg feed compared to unsupplemented ones. High-density lipoprotein was significantly elevated in fish fed 0.5 and 1 % Aloe/kg feed compared to unsupplemented ones, and no significant changes (P > 0.05) were noted in low-density lipoprotein among test groups. Furthermore, high activities of superoxide dismutase, catalase, and glutathione peroxide in liver tissues were observed in Aloe-supplemented fish compared to unsupplemented ones, before and after S. iniae challenge (7.7 x 10(6) CFU cells/mL). Variations were also noted in malondialdehyde activity throughout the trial, but no significant difference (P > 0.05) was observed between groups. Meanwhile, Aloe-supplemented fish reduced serum aspartate and alanine aminotransferase (AST and ALT) activities before and after challenge. Based on the second-order polynomial regression analysis, dietary Aloe inclusion levels less than or equal to 1.88, 1.86, and 2.79 %/kg feed were determined to be suitable in improving plasma lipid profile status, antioxidant, and hepatoprotective enzyme activities in GIFT-tilapia in this study, respectively. Thus, A. vera extracts may be recommended as a tilapia feed supplement to enhance fish antioxidant and hepatoprotective capacities, especially during disease outbreaks.
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