The aim of this experiment was to investigate the effect of Lycium barbarum polysaccharides (LBP) on alleviating soybean meal-induced enteritis (SBMIE) in spotted sea bass Lateolabrax maculatus. The diet with 44% fishmeal (FM) content was used as a blank control, and soybean meal (SM) was used to replace 50% FM as an experimental control to induce enteritis. Then, on the basis of experimental control, 0.10%, 0.15%, and 0.20% LBP were added as experimental diets. A total of 225 spotted sea bass (44.52 ± 0.24 g) were randomly divided into 5 groups and fed the corresponding diets for 52 d. The results showed that 0.15% LBP decreased serum D-lactic acid (D-LA) content and diamine oxidase (DAO) activity (P < 0.05). In addition, in all LBP supplementation groups, the intestinal tissue morphology was significantly improved (P < 0.05); the intestinal microbial structure gradually recovered to a level close to that without adding SM; and the microbial species richness and diversity were significantly increased (P < 0.05). Through transcriptomic and metabolomic analysis, it was found that the expression of proinflammatory factors such as interleukin-1β (IL-1β), interleukin-12 (IL-12), nuclear factor kappa B subunit 2 (NF-κB2), and Toll-like receptor 2 (TLR2) were significantly down-regulated in the mitogen-activated protein kinase (MAPK) and Toll-like receptor signaling pathways (P < 0.05), and the important tight junction protein gene Occludin was up-regulated (P < 0.05). In addition, LBP down-regulated saponin metabolites and up-regulated amino acid metabolites (P < 0.05). In conclusion, LBP demonstrated a significant alleviating effect on SBMIE of spotted sea bass L. maculatus.
Dietary supplementation of Lycium barbarum polysaccharides alleviates soybean meal-induced enteritis in spotted sea bass Lateolabrax maculatus
Longhui Liu,Yanbo Zhao,Zhangfan Huang,Zhongying Long,Huihui Qin,Hao Lin,Sishun Zhou,Lumin Kong,Jianrong Ma,Yi Lin,Zhongbao Li
Published 2024 in Animal Nutrition
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- Publication year
2024
- Venue
Animal Nutrition
- Publication date
2024-11-01
- Fields of study
Agricultural and Food Sciences, Medicine
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Semantic Scholar, PubMed
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