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Nutrition clinique et métabolisme
Volume 14, n° 3
pages 237-240 (septembre 2000)
Doi : S0985-0562(00)80028-X
Interactions protéines — Énergie
Protein/energy relationship

Bernard Beaufrère
 Laboratoire de nutrition humaine, 63009 Clermont-Ferrand cedex, France 


Le métabolisme des protéines (protéosynthèse et protéolyse) requiert de l'énergie. De ce fait, une limitation de l'apport énergétique réduit la balance azotée. Glucides et lipides ont un effet d'épargne azoté sensiblement égal mais des mécanismes d'action (hormones, compétition entre substrats) différents. L'effet de la longueur de chaîne des acides gras est également considéré.

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Protein metabolism (synthesis and breakdown) is energy requiring. Therefore, a reduced energy intake results in a decreased nitrogen balance. Carbohydrates and fat are nitrogen sparing to the same extent. However, their mechanisms of action (hormones, substrate competition) are different. The specific effects of the fatty acids chain length are also considered.

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Keyword : acides aminés, acides gras, azote, jeûne

Keywords : aminoacids, fasting, fatty acids, nitrogen

© 2000  Published by Elsevier Masson SAS.
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