Dietary tryptophan modulates intestinal immune response, barrier function, antioxidant status and gene expression of TOR and Nrf2 in young grass carp (Ctenopharyngodon idella)

2014 ◽  
Vol 40 (1) ◽  
pp. 275-287 ◽  
Author(s):  
Hailang Wen ◽  
Lin Feng ◽  
Weidan Jiang ◽  
Yang Liu ◽  
Jun Jiang ◽  
...  
Keyword(s):  
Gene Expression ◽  
Immune Response ◽  
Grass Carp ◽  
Barrier Function ◽  
Antioxidant Status ◽  
Ctenopharyngodon Idella ◽  
Grass Carp Ctenopharyngodon Idella

scholarly journals Mannan Oligosaccharides Application: Multipath Restriction From Aeromonas hydrophila Infection in the Skin Barrier of Grass Carp (Ctenopharyngodon idella)

2021 ◽  
Vol 12 ◽  
Author(s):  
Zhiyuan Lu ◽  
Lin Feng ◽  
Wei-Dan Jiang ◽  
Pei Wu ◽  
Yang Liu ◽  
...  
Keyword(s):  
Signaling Pathway ◽  
Aeromonas Hydrophila ◽  
Grass Carp ◽  
Barrier Function ◽  
Pathogenic Bacteria ◽  
Skin Barrier ◽  
Ctenopharyngodon Idella ◽  
Skin Barrier Function ◽  
Grass Carp Ctenopharyngodon Idella ◽  
Mannan Oligosaccharides

The objective of this study was to evaluate the efficacy of dietary Mannan oligosaccharides (MOS) supplementation on skin barrier function and the mechanism of on-growing grass carp (Ctenopharyngodon idella). Five hundred forty grass carp were fed for 60 days from the growing stage with six different levels of MOS diets (0, 200, 400, 600, 800, and 1,000 mg kg-1). At the end of the growth trial, the 14-day Aeromonas hydrophila challenge experiment has proceeded. The obtained data indicate that MOS could (1) decline skin lesion morbidity after being challenged by the pathogenic bacteria; (2) maintain physical barrier function via improving antioxidant ability, inhibiting excessive apoptosis, and strengthening the tight junction between the epithelial cell and the related signaling pathway (Nrf2/Keap1, p38MAPK, and MLCK); and (3) regulate immune barrier function by modulating the production of antimicrobial compound and expression of involved cytokines and the related signaling pathway (TOR and NFκB). Finally, we concluded that MOS supplementation reinforced the disease resistance and protected the fish skin barrier function from Aeromonas hydrophila infection.

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