Dietary soya allergen β-conglycinin induces intestinal inflammatory reactions, serum-specific antibody response and growth reduction in a carnivorous fish species, turbot Scophthalmus maximus L.

作者：Yanxian Li, Haibin Hu, Jintao Liu, Pei Yang, Yanjiao Zhang, Qinghui Ai, Wei Xu, Wenbing Zhang, Kangsen Mai · 发表于：Aquaculture Research · 年份：2016 · DOI：10.1111/are.13224 · 被引用次数：63 · 研究领域：Aquaculture Nutrition and Growth、Aquaculture disease management and microbiota、Reproductive biology and impacts on aquatic species

This study was conducted to investigate the effects of dietary β-conglycinin on the growth performance, digestion, gut morphology and immune responses of juvenile turbot (Scophthalmus maximus L.). Four diets were formulated to contain 0%, 2%, 4% and 8% purified β-conglycinin. Triplicate groups of 30 fish were fed to apparent satiation twice daily for 12 weeks. Fish fed 4% and 8% dietary β-conglycinin showed significantly reduced specific growth rate, feed efficiency ratio, apparent digestibility coefficient of nutrients and whole-body lipid contents, as well as a profound infiltration of mixed leucocytes in the lamina propria and a significant decrease in the absorptive surface of distal intestine. The expression of pro-inflammatory cytokines, TNF-α and IL-1β, in the distal intestine was significantly upregulated by 4% dietary β-conglycinin, whereas a significantly lower expression level of IgM and anti-inflammatory cytokine TGF-β1 was observed in fish fed 8% dietary β-conglycinin. Serum lysozyme and alternative complement pathway activity were first significantly enhanced by 2% dietary β-conglycinin and then rapidly declined by 4% and 8% dietary β-conglycinin. Respiratory burst activity of head kidney macrophages and serum superoxide dismutase activity were significantly suppressed by 4% and 8% dietary β-conglycinin. Dietary β-conglycinin (2–8%) significantly increased the level of specific antibody against β-conglycinin in serum. Collectively, these results suggested that h...