Dietary Protein Optimization for Growth and Immune Enhancement in Juvenile Hybrid Sturgeon (Acipenser baerii x A. schrenckii): Balancing Growth Performance, Serum Biochemistry, and Expression of Immune-Related Genes
文献类型： 外文期刊
作者： Wang, Chang'an 1 ; Liu, Entong 2 ; Zhang, Hui 2 ; Shi, Honghe 2 ; Qiu, Guangwen 2 ; Lu, Shaoxia 1 ; Han, Shicheng 1 ; Jiang, Haibo 3 ; Liu, Hongbai 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Key Lab Aquat Anim Dis & Immune Technol Heilongjia, Harbin 150070, Peoples R China
2.Northeast Agr Univ, Coll Anim Sci & Technol, Harbin 150030, Peoples R China
3.Guizhou Univ, Coll Anim Sci, Guiyang 550000, Peoples R China
关键词： hybrid sturgeon; dietary protein; growth performance; immune response; gene expression
期刊名称：BIOLOGY-BASEL （ 影响因子：4.2； 五年影响因子：4.4 ）
ISSN：
年卷期： 2024 年 13 卷 5 期
页码：
收录情况： SCI
摘要： This study aimed to evaluate the effects of dietary protein levels on growth performance, serum indices, body amino acid composition, and intestinal gene expression in juvenile hybrid sturgeon (Acipenser baerii x A. schrenckii). Hybrid sturgeons (initial weight 29.21 +/- 2.04 g) were fed isolipidic diets containing 30%, 33%, 36%, 39%, 42% or 45% crude protein for 12 weeks (n = 18 tanks, 30 fish/tank). Results showed significant differences between treatments, where weight gain and protein efficiency ratio peaked optimally between 35.9% and 38.3% dietary protein. Serum parameters such as glucose, alanine aminotransferase, aspartate aminotransferase, superoxide dismutase, and lipid peroxidation levels varied significantly with changes in dietary protein levels. Specifically, the highest enzymatic activities and growth parameters were observed in groups fed with 33% to 39% protein, enhancing whole-body concentrations of lysine, leucine, phenylalanine, proline, and glutamic acid. Immune parameters such as immunoglobulin M and lysozyme activity also showed peak levels at higher protein concentrations, particularly notable at 42% for lysozyme and 36% for both component 3 and immunoglobulin M. Gene expression related to immune and growth pathways, including MyD88, TLR1, IL-8, IL-6, NF-kappa B, and IL1 beta, was significantly upregulated at protein levels of 33% to 36%, with a noted peak in expression at 39% for TLR1, IL-10, and TOR signaling genes, before diminishing at higher protein levels. Overall, the dietary protein requirement for juvenile hybrid sturgeon ranges from 35.9% to 38.3% crude protein.
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