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营养物质在肠内被分解成肽和氨基酸后,通过不同的吸收途径进入肠上皮细胞,然后进入血液供机体的蛋白合成或产能需要,研究者在鱼类中已经发现肽载体蛋白并对其分子结构进行了分析,对其转运特性和调控因素进行了一些研究,而氨基酸载体的研究还是空白,只是通过同位素示踪技术对小肠的吸收动力学进行过研究。文章综述了近年来鱼类小肠对肽及游离氨基酸吸收方面的研究,旨在为研究饲料配方的平衡性或者进行小肠营养生理方面的研究提供参考和思路。
Nutrients in the intestine is broken down into peptides and amino acids, enter the intestinal epithelial cells through different absorption routes, and then enter the blood for the body’s protein synthesis or capacity needs, the researchers have found in fish peptide carrier protein and its molecules The structure of the small intestine was analyzed. Some studies on its transport characteristics and regulatory factors were carried out. However, the study of amino acid carrier was still blank. Only the absorption kinetics of small intestine was studied by isotope tracing technique. In this paper, the research on the absorption of peptides and free amino acids in the small intestine of fish in recent years is reviewed in order to provide reference and ideas for the study of the balance of feed formula or the study of nutrition in small intestine.