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Leucine-supplemented meal feeding for ten days beneficially affects postprandial muscle protein synthesis in old rats
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ABSTRACT Acute leucine supplementation of the diet has been shown to blunt defects in postprandial muscle protein metabolism in old rats. This study was undertaken to determine whether the effect of leucine persists in a 10-d experiment. For this purpose, adult (9 mo) and old (21 mo) rats were fed a semiliquid 18.2 g/100 g protein standard diet during the 8-h dark period for 1 mo. Then, each group was given either a leucine-supplemented meal or an alanine-supplemented meal (as the control meal) for 1 h and the standard diet the rest of the feeding period. On d 10, rats were fed either no food ...
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Modulations of Muscle Protein Metabolism by Branched-Chain Amino Acids in Normal and Muscle-Atrophying Rats1,2
; ...anabolism in vivo. We examined muscle protein synthesis rate and breakdown rate...muscle atrophy models. Muscle protein synthesis rate and breakdown rate...rats, BCAAs stimulated muscle protein synthesis despite low insulin concentration...
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Postprandial stimulation of muscle protein synthesis in old rats can be restored by a leucine-supplemented meal
; ...Postprandial Stimulation of Muscle Protein Synthesis in Old Rats Can Be Restored...muscle mass. A decrease of muscle protein synthesis stimulation has been detected...correlated to a decrease of muscle protein synthesis sensitivity to leucine...
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Review article: exercise, aging, and muscle protein metabolism
; ...imbalance between the rates of muscle protein synthesis and muscle proteolysis...increases the rate of muscle protein synthesis in men and women aged...increment in the rate of muscle protein synthesis and contributes to muscle...
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The Increase in Human Muscle Protein Synthesis Induced by Food Intake Is Similar When Assessed with the Constant Infusion and Flooding Techniques1
; ...accompanied by a stimulation of muscle protein synthesis. However, the reported...young growing animals, muscle protein synthesis is particularly sensitive...a rapid inhibition of muscle protein synthesis, and refeeding induces...
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Relationship of protein synthesis to mRNA levels in the muscle of chicks under various nutritional conditions
; ...mechanisms regulating muscle protein synthesis in chicks under various...nutrient. The increase in muscle protein synthesis of unfed chicks following...nutrient intake can change muscle protein synthesis rates in chicks largely...
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Pulse protein feeding pattern restores stimulation of muscle protein synthesis during the feeding period in old rats
; ...Restores Stimulation of Muscle Protein Synthesis during the Feeding Period...a lower sensitivity of muscle protein synthesis to feeding. To overcome...feeding of gastrocnemius muscle protein synthesis in old rats; and 3) it...
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Roles of insulin and amino acids in the regulation of protein synthesis in the neonate
; ...relationship between skeletal muscle protein synthesis and plasma insulin concentration...suggest that skeletal muscle protein synthesis rates and circulating...demonstrated to stimulate muscle protein synthesis in weaned, but still growing...
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Skeletal Muscle Protein Anabolic Response to Increased Energy and Insulin Is Preserved in Poorly Controlled Type 2 Diabetes1,2
; ...postabsorptive state). Muscle protein synthesis and breakdown (nmol...12) (P < 0.05) and muscle protein synthesis tended (P 0.07) to be...decreased (P < 0.05), and muscle protein synthesis tended to decrease (P...
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Latency, duration and dose response relationships of amino acid effects on human muscle protein synthesis
; ...Acid Effects on Human Muscle Protein Synthesis, ABSTRACT The components...postprandial. Within this range, muscle protein synthesis (measured by incorporation...of amino acids causes muscle protein synthesis to be stimulated and to...
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The Muscle Protein Synthetic Response to Carbohydrate and Protein Ingestion Is Not Impaired in Men with Longstanding Type 2 Diabetes1-3
; ...Protein ingestion stimulates muscle protein synthesis and improves net muscle...in which whole body and muscle protein synthesis were measured following...treatment in both groups. Muscle protein synthesis rates were higher in both...
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