INTESTINAL AND HEPATIC NITROGEN-BALANCE IN THE RAT AFTER THE ADMINISTRATION OF AN ORAL PROTEIN LOAD

被引:6
|
作者
FERNANDEZLOPEZ, JA [1 ]
CASADO, J [1 ]
ESTEVE, M [1 ]
RAFECAS, I [1 ]
ARGILES, JM [1 ]
REMESAR, X [1 ]
ALEMANY, M [1 ]
机构
[1] UNIV BARCELONA,DEPT BIOQUIM & FISIOL,E-08028 BARCELONA,SPAIN
关键词
LIVER; INTESTINE; PROTEIN LOAD; N-BALANCE; RAT;
D O I
10.1079/BJN19930074
中图分类号
R15 [营养卫生、食品卫生]; TS201 [基础科学];
学科分类号
100403 ;
摘要
The fate of a small oral dose of protein given to overnight-starved rats was studied. After 3 h, 62 % of the protein amino acids had been absorbed. Most of the absorbed N went into the bloodstream through the portal in the form of amino acids, but urea and ammonia were also present. About one-quarter of all absorbed N was carried as lymph amino acids. The liver was able to take all portal free ammonia and a large proportion of portal amino acids, releasing urea. The hepatic N balance was negative, indicating active proteolysis and net loss of liver protein.
引用
收藏
页码:733 / 742
页数:10
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