期刊
FISH & SHELLFISH IMMUNOLOGY
卷 86, 期 -, 页码 814-831出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.fsi.2018.12.014
关键词
Gossypol; Grass carp (Ctenopharyngodon idella); Intestinal immunity; NF-kappa B signalling; TOR signalling
资金
- National Basic Research Program of China (973 Program) [2014CB138600]
- National Department Public Benefit Research Foundation (Agriculture) of China [201003020]
- Outstanding Talents and Innovative Team of Agricultural Scientific Research (Ministry of Agriculture), Science and Technology Support Program of Sichuan Province of China [2014NZ0003]
- Major Scientific and Technological Achievement Transformation Project of Sichuan Province of China [2012NC0007, 2013NC0045]
- Demonstration of Major Scientific and Technological Achievement Transformation Project of Sichuan Province of China [2015CC0011]
- Earmarked Fund for China Agriculture Research System [CARS-45]
- Natural Science Foundation for Young Scientists of Sichuan Province [2014JQ0007]
- Foundation of Sichuan Youth Science and Technology Innovation Research Team [2017TD0002]
The present study explored the effects of dietary gossypol on the gut health of on-growing grass carp. The fish were fed six diets containing different levels of free gossypol (0, 121.38, 243.94, 363.89, 759.93 and 1162.06 mg/kg diet) from gossypol-acetic acid for 60 days and then challenged with Aeromonas hydrophila for 14 days. The results showed that dietary gossypol (1) could aggravate enteritis and damage the structure of intestinal epithelial cells, (2) decreased the lysozyme (LZ) and Acid phosphatase (ACP) activities, complement 3 (C3), C4 and immunoglobulin M (IgM) contents, and it down-regulated the Hepcidin (rather than distal intestine (DI)), immunoglobulin Z (IgZ), liver-expressed antimicrobial peptide (LEAP)-2B, Mucin2 and beta-defensin-1 mRNA levels in the proximal intestine (PI), mid intestine (MI) and DI, (3) up-regulated intestinal pro-inflammatory cytokines tumor necrosis factor alpha (TNF-alpha), interferon gamma 2 (IFN-gamma 2), interleukin 1 beta (IL-1 beta), IL-6 (only in PI), IL-8 and IL-12p35 mRNA levels partly related to nuclear factor kappa B (NF-kappa B) signalling, and (4) down-regulated the mRNA levels of anti-inflammatory cytokines such as transforming growth factor (TGF)-beta 1, TGF-beta 2, interleukin 4/13A (IL-4/13A) (except IL-4/13B), IL-10 and IL-11 partly relating to target of rapamycin (TOR) signalling in the intestines of on-growing grass carp. Moreover, the dietary gossypol had no impact on the LEAP-2A, IL-12P40, IL-17D, IL-10, NF-kappa Bp52, IKK alpha and eIF4E-binding proteins 2 (4E-BP2) mRNA levels in the intestines. Finally, based on the intestinal histopathological results, enteritis morbidity, LZ activity and IgM content, the safe dose of gossypol in the diets for on-growing grass carp should be less than 103.42 mg/kg diet.
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