Whole-body leucine and lysine metabolism: response to dietary protein intake in young men.
Whole-body leucine and lysine metabolism: response to dietary protein intake in young men.
复制标题
全身亮氨酸和赖氨酸代谢:年轻男性对膳食蛋白质摄入量的反应。
DOI:
10.1152/ajpendo.1981.240.6.e712
复制
发表时间:
1981
期刊:
影响因子:
--
通讯作者:
Young,VR
中科院分区:
文献类型:
--
作者:
Motil,KJ;Matthews,DE;Bier,DM;Burke,JF;Munro,HN;Young,VR
Whole-body leucine and lysine metabolism was explored in young adult men by a primed constant intravenous infusion of a mixture of L-[1–13C]leucine and L-[alpha-15N]lysine over a 4-h period. Subjects were studied after an overnight fast (postabsorptive state) or while consuming hourly meals (fed state) after adaptation to diets providing either a surfeit level of protein (1.5 g.kg body-1.day-1), a level approximating maintenance requirements (marginal intake) (0.6 g.kg body wt-1.day-1), or a grossly inadequate level (0.1 g.kg-1.day-1). The change in protein intake from a marginal to a surfeit level was associated with an increased leucine flux and incorporation of leucine into body protein. In the fed state, oxidation of leucine increased sharply and release of leucine from tissue protein diminished. When dietary protein intake was reduced from the requirement to inadequate level, leucine flux and body protein synthesis and protein breakdown were reduced, together with a smaller reduction in leucine oxidation. The response of the metabolism of [15N]lysine was responsible for maintenance of leucine and other essential amino acid economy, and they appear to be related to the nitrogen and amino acid requirements of the subject. These findings also demonstrate an effect of meals, modulated by their protein content, on the dynamics of whole-body amino acid metabolism.
登录
查看更多内容
DOI:
--
发表时间:
1980
期刊:
影响因子:
--
作者:
P. Garlick;G. Clugston;R. W. Swick;J. Waterlow
通讯作者:
J. Waterlow
影响因子:
2.9
作者:
D. Bier;H. Christopherson
通讯作者:
H. Christopherson
DOI:
--
发表时间:
1977
期刊:
Journal of NutriLife
影响因子:
--
作者:
Y. A. Kang;A. Harper
通讯作者:
A. Harper
影响因子:
7.1
作者:
W. Rand;V. Young;N. Scrimshaw
通讯作者:
N. Scrimshaw
DOI:
--
发表时间:
1979
期刊:
Journal of NutriLife
影响因子:
--
作者:
E. A. Oddoye;S. Margen
通讯作者:
S. Margen