Effect of dietary isoleucine on skin mucus barrier and epithelial physical barrier functions of hybrid bagrid catfishPelteobagrus vachellixLeiocassis longirostris
文献类型： 外文期刊
作者： Yin, Long 1 ; Zhao, Ye 1 ; Zhou, Xiao-Qiu 2 ; Yang, Chao 1 ; Feng, Lin 2 ; Liu, Yang 2 ; Jiang, Wei-Dan 2 ; Wu, Pei 2 ; Zhou 1 ;
作者机构： 1.Sichuan Agr Univ, Coll Anim Sci & Technol, Chengdu 611130, Peoples R China
2.Sichuan Agr Univ, Anim Nutr Inst, Chengdu 611130, Peoples R China
3.Sichuan Agr Univ, Fish Nutr & Safety Prod Univ Key Lab Sichuan Prov, Yaan 625014, Peoples R China
4.Sichuan Acad Agr Sci, Fisheries Inst, Chengdu 611731, Peoples R China
关键词： Isoleucine; Barrier function; Antioxidant defense; Tight junction; Skin; Hybrid bagrid catfish
期刊名称：FISH PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：2.794； 五年影响因子：2.876 ）
ISSN： 0920-1742
年卷期： 2020 年 46 卷 5 期
页码：
收录情况： SCI
摘要： The study investigated the effects of dietary isoleucine (Ile) on skin mucus barrier and epithelial physical barrier functions of hybrid bagrid catfishPelteobagrus vachellixLeiocassis longirostris. A total of 630 fish (33.11 +/- 0.09 g) were fed semi-purified isonitrogenous diets containing 5.0 (control), 7.5, 10.0, 12.5, 15.0, 17.5, and 20.0 g Ile kg(-1)diet for 8 weeks. The results indicated that dietary Ile increased (P < 0.05) in skin (1) mucus protein content and antimicrobial activity against three gram-negative bacteria (Aeromonas hydrophila,Escherichia coli, andYersinia ruckeri) and two gram-positive bacteria (Streptococcus agalactiaeandStaphylococcus aureus), (2) mucus lysofew information is available about the influencezyme (LZM), acid phosphatase (ACP), and alkaline phosphatase (AKP) activities, and complement 3 and 4 (C3 and C4) and immunoglobulin M (IgM) contents, (3) intelectin 1 (intl1), intelectin 2 (intl2), c-type-lysozyme (c-LZM), g-type-lysozyme (g-LZM), and beta-defensin mRNA levels. Dietary Ile decreased (P < 0.05) reactive oxygen species (ROS), malondialdehyde (MDA), and protein carbonyl (PC) contents, and up-regulated (P < 0.05) CuZnSOD, GST, GPX1a, muc5ac, muc5b, zonula occludens-1 (ZO-1), zonula occludens-2 (ZO-2), occludin, and claudin 3 mRNA levels in skin. These results indicated that Ile improved skin mucus barrier function via increasing mucus protein, C3 and C4, and IgM contents and antibacterial factors activities, and promoted epithelial physical barrier function via decreasing skin antioxidant damage and improving tight junction structure in hybrid bagrid catfish.
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