首页> 外文期刊>Livestock Science >In vitro oxidation of essential amino acids by jejunal mucosal cells of growing pigs.
【24h】

In vitro oxidation of essential amino acids by jejunal mucosal cells of growing pigs.

机译:生长猪的空肠黏膜细胞体外氧化必需氨基酸。

获取原文
获取原文并翻译 | 示例
           

摘要

This study was conducted to test the hypothesis that porcine jejunal mucosal cells can degrade all essential amino acids (EAA). Jejunal mucosal cells (primarily enterocytes) were isolated from 50-day-old healthy pigs and incubated at 37 degrees C for 45 min in Krebs buffer containing plasma concentrations of amino acids and one of the following L-[1-14C]- or L-[U-14C]-amino acids plus unlabelled tracers at 0.5, 2, or 5 mM: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. There was active transamination of leucine, isoleucine and valine in the cells (1.35-2.5 nmol/mg protein per 45 min at 2 mM), with most (67-71%) of their alpha -ketoacids released into the medium. In contrast, catabolism of methionine and phenylalanine was negligible (0.04-0.05 nmol/mg protein per 45 min at 2 mM) and that of other EAA was completely absent in these cells. These results indicate that intestinal mucosal cells are a site for the substantial degradation of branched-chain amino acids but not other EAA in pigs..
机译:进行了这项研究以检验猪空肠粘膜细胞可以降解所有必需氨基酸(EAA)的假设。从50天大的健康猪中分离出空肠黏膜细胞(主要是肠上皮细胞),并在含有血浆浓度的氨基酸和以下L- [1-14C]-或L之一的Krebs缓冲液中于37摄氏度孵育45分钟。 -[U-14C]-氨基酸加上未标记的示踪剂(0.5、2或5 mM):组氨酸,异亮氨酸,亮氨酸,赖氨酸,蛋氨酸,苯丙氨酸,苏氨酸,色氨酸和缬氨酸。细胞中存在亮氨酸,异亮氨酸和缬氨酸的主动转氨作用(在2 mM下每45分钟中有1.35-2.5 nmol / mg蛋白),其中大部分(67-71%)的α-酮酸释放到培养基中。相反,蛋氨酸和苯丙氨酸的分解代谢可忽略不计(在2 mM下每45分钟0.04-0.05 nmol / mg蛋白),而在这些细胞中完全没有其他EAA的分解代谢。这些结果表明,肠粘膜细胞是猪中支链氨基酸大量降解的位点,而不是其他EAA。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号