Amino acids as modulators of the European seabass, Dicentrarchus labrax, innate immune response: an in vitro approach

被引:0
作者
Rita Azeredo
Cláudia R. Serra
Aires Oliva-Teles
Benjamín Costas
机构
[1] Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR),Departamento de Biologia
[2] Universidade do Porto,undefined
[3] Terminal de Cruzeiros do Porto de Leixões,undefined
[4] Avenida General Norton de Matos s/n,undefined
[5] Faculdade de Ciências da Universidade do Porto (FCUP),undefined
[6] Rua do Campo Alegre s/n,undefined
[7] Ed. FC4,undefined
[8] Instituto de Ciências Biomédicas Abel Salazar,undefined
[9] Universidade do Porto (ICBAS-UP),undefined
[10] Rua de Jorge Viterbo Ferreira 228,undefined
来源
Scientific Reports | / 7卷
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摘要
Teleost innate immune system is a most developed and powerful system in which fish highly rely throughout their lives. Conditions in aquaculture farms are particularly prone to disease, thus, health and welfare ensuring strategies are an urgent call to which nutrition is gradually becoming a most regarded achievement tool. This study intended to evaluate different amino acids’ effect on immune-related mechanisms as well as their potential as enhancers of European seabass, Dicentrarchus labrax, leucocyte functioning. To achieve these goals, primary cultures of head-kidney leucocytes were established and kept in amino acid (glutamine, arginine, tryptophan or methionine) supplemented culture media in two doses. The effects of amino acids treatments were then evaluated after stimulation with either Vibrio anguillarum or Vibrio anguillarum lipopolysaccharides by measuring nitric oxide production, extracellular respiratory burst, ATP and arginase activities, and expression of immune-related genes. Glutamine, arginine and tryptophan showed to be particularly relevant regarding cell energy dynamics; arginine and tryptophan supplementation also resulted in down-regulation of important immune-related genes. Immune responses in cells treated with methionine were generally enhanced but further studies, particularly those of enzymes activity, are essential to complement gene expression results and to better understand this nutrient’s immune role in fish.
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