Effects of Dietary 5-Aminolevulinic Acid on Growth, Nutrient Composition, and Intestinal Microflora in Juvenile Shrimp, Litopenaeus vannamei
文献类型： 外文期刊
作者： Li, Yiming 1 ; Ye, Yucong 3 ; Zhu, Yashi 3 ; Yao, Zongli 1 ; Zhou, Kai 1 ; Wei, Yuxing 1 ; Zhang, Lin 2 ; Bao, Ning 2 ; Zhao, Yunlong 3 ; Lai, Qifang 1 ;
作者机构： 1.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China
2.Beijing Challenge Biotechnol Co Ltd, Beijing 100081, Peoples R China
3.East China Normal Univ, Sch Life Sci, 500 Dongchuan Rd, Shanghai 200241, Peoples R China
关键词： 5-Aminolevulinic acid; Litopenaeus vannamei; Growth; Gene expression; Intestinal health
期刊名称：MARINE BIOTECHNOLOGY （ 影响因子：2.8； 五年影响因子：3.0 ）
ISSN： 1436-2228
年卷期： 2024 年 26 卷 6 期
页码：
收录情况： SCI
摘要： 5-Aminolevulinic acid (5-ALA) is an endogenous non-protein amino acid and has been used as a new type of growth promoter in aquaculture feed. This study explored the effects of 5-ALA on growth and intestinal health in juvenile shrimp, Litopenaeus vannamei. Shrimps were fed diets containing five different 5-ALA levels (0, 15, 30, 45, and 60 g/t) for 90 days. A concentration of 45 g/t 5-ALA significantly improved growth metrics, including the specific growth rate, protein efficiency, and feed conversion (P < 0.05). The optimal concentration of 5-ALA was 38.3 g/t, as indicated by broken-line regression. Dietary supplementation with 5-ALA increased the crude protein content of whole shrimp, but had no significant effect on the moisture, ash, or crude lipid content (P > 0.05). Suitable supplementation of 5-ALA (45 g/t, 60 g/t) improved the activities of the digestive enzymes alpha-amylase, pepsin, trypsin, and lipase, thus promoting digestion and absorption. Shrimp fed with 45 g/t 5-ALA had increased levels of essential amino acids in the muscles and a higher proportion of polyunsaturated fatty acids in the hepatopancreas. Supplementation with 45 or 60 g/t 5-ALA upregulated the expression of genes related to growth and molting, including chitinase, ecdysone receptor, retinoic X receptor, calcium/calmodulin-dependent protein kinase I, heat shock protein 60, and heat shock protein 70. Moreover, dietary supplementation with 5-ALA affected the abundance of intestinal flora, increased the number of beneficial bacteria, and improved intestinal health. These results indicated that 5-ALA may significantly benefit shrimp health and aquaculture productivity, providing a novel theoretical basis for further research into 5-ALA as a dietary supplement.
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