动物营养学报
動物營養學報
동물영양학보
ACTA ZOONUTRIMENTA SINICA
2015年
1期
21-27
,共7页
肠道%小肽转运载体%氨基酸转运系统%基因表达%分子机制
腸道%小肽轉運載體%氨基痠轉運繫統%基因錶達%分子機製
장도%소태전운재체%안기산전운계통%기인표체%분자궤제
intestine%small peptide transporter%amino acid transporters%gene expression%molecular mecha-nism
饲粮蛋白质在瘤胃或肠道被降解成多肽，并进一步被分解成氨基酸和小肽，然后被吸收、利用。肠道氨基酸的转运受多种氨基酸转运载体，如中性、酸性和碱性氨基酸转运载体等的调节，小肽的转运则由小肽转运载体1介导。目前，对氨基酸及小肽转运载体基因的表达和功能调节相关的分子机制还不清楚，有待于进一步研究。本文综述了动物小肠肽与氨基酸转运载体等，重点介绍了其基因表达调节的分子机制、影响因素以及营养调控方面的研究进展。
飼糧蛋白質在瘤胃或腸道被降解成多肽，併進一步被分解成氨基痠和小肽，然後被吸收、利用。腸道氨基痠的轉運受多種氨基痠轉運載體，如中性、痠性和堿性氨基痠轉運載體等的調節，小肽的轉運則由小肽轉運載體1介導。目前，對氨基痠及小肽轉運載體基因的錶達和功能調節相關的分子機製還不清楚，有待于進一步研究。本文綜述瞭動物小腸肽與氨基痠轉運載體等，重點介紹瞭其基因錶達調節的分子機製、影響因素以及營養調控方麵的研究進展。
사량단백질재류위혹장도피강해성다태，병진일보피분해성안기산화소태，연후피흡수、이용。장도안기산적전운수다충안기산전운재체，여중성、산성화감성안기산전운재체등적조절，소태적전운칙유소태전운재체1개도。목전，대안기산급소태전운재체기인적표체화공능조절상관적분자궤제환불청초，유대우진일보연구。본문종술료동물소장태여안기산전운재체등，중점개소료기기인표체조절적분자궤제、영향인소이급영양조공방면적연구진전。
Dietary proteins are degraded into amino acids and small peptides in the rumen or intestinal tract, and then absorbed and utilized. Transportation of amino acids is regulated by amino acids transporters, inclu-ding neutral, acidic and alkaline amino acid transporters, whereas the uptake of small peptides is performed by peptide transporter 1. At present, the molecular mechanisms for expression of genes of relevant transporters and function regulation are still not clear, and warrants further study. This article reviewed amino acid and peptide transporters in the intestinal tract, focusing on recent advances on molecular mechanisms for control of expres-sion of amino acid and peptide transporters genes, factors influencing these expressions, and their nutritional regulation.
