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- W1936228450 abstract "The metabolic effects of a protein-rich meal were studied for 3 h in 10 controls and in 20 cirrhotic patients. After protein ingestion, blood glucose did not vary significantly. Insulin and glucagon levels rose in controls and, more markedly, in cirrhotics. Aromatic amino acids and tryptophan increased more in cirrhotics as a result of their decreased liver function. Similarly, branched-chain amino acids increased by 153 +/- 14 nmol/ml X min (mean +/- SE) in controls and by 259 +/- 27 nmol/ml X min in cirrhotics (p less than 0.02), in the presence of a markedly increased insulin response. Branched-chain amino acid metabolism mainly occurs in skeletal muscle under insulin control; in cirrhosis, it might be reduced as a consequence of insulin resistance. To support this hypothesis, the effects of the protein meal were compared with those of an oral glucose load in 15 cirrhotic patients. Branched-chain amino acid response to protein ingestion significantly correlated with blood glucose response to oral glucose (r = 0.714), and with insulin resistance during the glucose tolerance test, when assessed by the insulinogenic index (r = 0.628). Similarly, in 8 patients, increased branched-chain amino acid response also correlated with the index of tissue sensitivity to insulin obtained by means of the glucose clamp technique during continuous insulin infusion (r = -0.809). We conclude that liver cirrhosis is characterized by an abnormal branched-chain amino acid response to protein ingestion, which matches the well-known intolerance to oral glucose. Both alterations are possibly due to decreased peripheral insulin activity on substrates." @default.
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- W1936228450 date "1983-08-01" @default.
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- W1936228450 title "Plasma amino acid response to protein ingestion in patients with liver cirrhosis" @default.
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- W1936228450 doi "https://doi.org/10.1016/0016-5085(83)90312-8" @default.
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