Citat:
Ursprungligen postat av Hannes
Stimulerar inte kasein proteinsyntesen? utan bara emot nedbrytning?
Vassle stimulerar proteinsytesen och nedbrytningen?
Blev just nu förvirrad. Trodde kasein stimulerade proteinsyntesen också?
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Exakt vad jag skrev i inlägget jag länkade till ovan.
"The most striking differences between the fast and slow meals had to do with protein synthesis, as assessed by NOLD, and with amino acid oxidation. Stimulation of synthesis was dramatic and immediate after the fast meals, whereas it was absent after the slow meals. Such unique responses to the fast and slow meals are most likely due to different levels of amino acid availability. Indeed "fast proteins," which strongly increased amino acid availability (as reflected by plasma aminoacidemia), probably induced a stimulation of protein synthesis. By contrast, "slow proteins," which modified plasma amino acid concentration to a much slower extent, were not associated with a stimulation of protein synthesis.
However, in the present study, stimulation of protein synthesis did not result in a better leucine balance. Indeed, leucine oxidation was also stimulated more by the fast than by the slow meals, which was likely due to direct stimulation of the rate-limiting enzymes of amino acid oxidation by the amino acids themselves. The absence of a relationship between a better balance and a higher synthesis also emphasizes the importance of the inhibition of protein breakdown in the postprandial utilization of proteins."
Am J Physiol Endocrinol Metab. 2001 Feb;280(2):E340-8.