Dietary astaxanthin differentially affected the lipid accumulation in the liver and muscle of the marine teleost, tiger puffer Takifugu rubripes
文献类型： 外文期刊
第一作者： Liao, Zhangbin
作者： Liao, Zhangbin;Xu, Houguo;Wei, Yuliang;Zhang, Qinggong;Liang, Mengqing;Liao, Zhangbin;Zhang, Qinggong;Xu, Houguo;Wei, Yuliang;Liang, Mengqing
作者机构：
关键词： astaxanthin; diet; lipid accumulation; Takifugu rubripes
期刊名称：AQUACULTURE RESEARCH （ 影响因子：2.082； 五年影响因子：2.415 ）
ISSN： 1355-557X
年卷期： 2018 年 49 卷 10 期
页码：
收录情况： SCI
摘要： The lipid-regulating effects of astaxanthin (ASTX) have been widely reported in terrestrial animals. However, little relevant information has been available in fish although ASTX has been used as exogenous pigment and antioxidant in fish feed. A 74-day feeding study was conducted to investigate the effects of dietary ASTX on lipid accumulation in the marine teleost tiger puffer. Four experimental diets differing only in ASTX supplementation, that is, 0 (control), 50 (ASTX50), 100 (ASTX100) and 500 (ASTX500) mg kg(-1), were randomly assigned to 12 tanks of juvenile tiger puffer. Compared to control, the liver lipid content in group ASTX50 was significantly higher, while those in groups ASTX100 and ASTX500 were lower. The muscle lipid contents in group ASTX500 were significantly higher compared to control. Group ASTX50 had the best growth performances, while diet ASTX500 seemed to have adverse effects. In the liver, compared to control, groups ASTX50 and ASTX100 showed significantly lower mRNA expressions of genes related to triglycerol synthesis and fatty acid synthesis, transport and uptake, but higher expressions of genes related to beta-oxidation and monoglycerol hydrolysis. In the muscle, compared to control, ASTX100 showed higher expressions of genes related to beta-oxidation. ASTX50 resulted in higher contents of saturated and monounsaturated fatty acids but lower contents of n-3 polyunsaturated fatty acids in fish. In conclusion, astaxanthin in diets for tiger puffer differentially regulated the lipid accumulation in the liver and muscle, both in dose-dependent manners. Excess dietary astaxanthin (500 mg/kg) had adverse effects on tiger puffer.
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