Impact of dietary protein levels on growth, immune response, digestibility, intestinal microbiota, and transcriptome in Litopenaeus vannamei fed cottonseed protein concentrate
文献类型： 外文期刊
作者： Wang, Hongming 1 ; Hu, Xin 1 ; Chen, Jian 1 ; Zheng, Yudong 1 ; Tan, Beiping 1 ; Shi, Lili 1 ; Zhang, Shuang 1 ;
作者机构： 1.Guangdong Ocean Univ, Coll Fisheries, Zhanjiang, Peoples R China
2.Minist Agr, Key Lab Aquat Livestock & Poultry Feed Sci & Techn, Zhanjiang, Peoples R China
3.Aquat Anim Precis Nutr & High Efficiency Feed Engn, Zhanjiang, Peoples R China
4.CATAS, Zhanjiang Expt Stn, Zhanjiang, Peoples R China
关键词： Litopenaeus vannamei; Growth performance; Immune response; Intestinal microbiota; Transcriptome
期刊名称：AQUACULTURE REPORTS （ 影响因子：3.7； 五年影响因子：4.0 ）
ISSN： 2352-5134
年卷期： 2025 年 42 卷
页码：
收录情况： SCI
摘要： This study investigated the effects of dietary protein levels on Litopenaeus vannamei using cottonseed protein concentrate (CPC) as the primary protein source. L. vannamei (initial body weight = 0.42 +/- 0.01 g) were fed diets containing 32 % (CPC32), 36 % (CPC36), 40 % (CPC40), 44 % (CPC44), and 48 % (CPC48) protein for 8 weeks. The CPC40 group exhibited the highest final body weight (FBW), weight gain rate (WGR), specific growth rate (SGR), and the lowest feed conversion ratio (FCR). Analysis of hepatopancreatic tissues revealed that activities of superoxide dismutase (SOD), peroxidase (PO), lysozyme (LZM), and catalase (CAT) were significantly reduced, while malondialdehyde (MDA) levels increased in the CPC48 group compared to the CPC40 group. The activities of trypsin and amylase were significantly decreased in the CPC32 and CPC48 groups compared to CPC40, with a notable decrease in trypsin activity also observed in the CPC36 group. Intestinal microbiota analysis showed significant shifts in the CPC40 group, including an increased Bacteroidetes to Proteobacteria ratio and higher relative abundances of Verrucomicrobia, Flavobacteriaceae, Demequinaceae, and Photobacterium. Transcriptomic analysis identified significant signaling pathways affected by dietary treatments, notably the IL-17 signaling pathway, endoplasmic reticulum protein processing, and cholesterol metabolism. Key genes such as HSP90B1 and HSP90AA1 were prominently involved in various pathways, including IL-17 signaling, thyroid hormone synthesis, fluid shear stress, prion disease, and atherosclerosis. Correlation analysis indicated a significant positive relationship between HSP90B1 gene expression and Photobacterium abundance. Furthermore, gene expression levels of HSP90B1 and HSP90AA1 in hemocytes were significantly elevated in the CPC32 and CPC48 groups compared to CPC40. In conclusion, the CPC40 diet may enhance immune pathways in L. vannamei through the synergistic modulation of the HSP90B1 gene and Photobacterium, leading to reduced intestinal pathogenic bacteria, improved immunity and digestive efficiency, ultimately promoting growth performance.
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