The effect of nutritional status on IGF-I mRNA expression in the liver and brain of juvenile barramundi (Lates calcarifer) was investigated. Fish were either fed a satiety ration (SAT) or starved (STV) for 6 weeks. Starved fish demonstrated significantly lower condition factor and hepatic IGF-I mRNA expression at 3 and 6 weeks, when compared with the SAT group. IGF-I mRNA expression in the brain was 10 fold lower than the liver and was not affected by ration size. These results suggest the liver is the major site of IGF-I mRNA synthesis and hepatic but not brain IGF-I mRNA expression is regulated by food availability in juvenile barramundi.

译文

研究了营养状况对幼年barramundi (Lates calcarifer) 肝脏和大脑中igf-i mRNA表达的影响。对鱼喂食饱腹感 (SAT) 或饥饿 (STV) 6周。与SAT组相比,饥饿的鱼在3周和6周时表现出明显较低的条件因子和肝igf-i mRNA表达。大脑中igf-i mRNA的表达比肝脏低10倍,不受日粮大小的影响。这些结果表明,肝脏是igf-i mRNA合成的主要部位,而肝脏而不是大脑igf-i mRNA的表达受幼年barramundi食物的调节。

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