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Correlation between the urinary excretion of acid-soluble peptides, fractional synthesis rate of whole body proteins, and plasma immunoreactive insulin-like growth factor-l/somatomedin C concentration in the rat

Published online by Cambridge University Press:  09 March 2007

Taek Jeong Nam
Affiliation:
Department of Agricultural Chemistry. Faculty of Agriculture, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
Tadashi Noguchi
Affiliation:
Department of Agricultural Chemistry. Faculty of Agriculture, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
Ryuhei Funabiki
Affiliation:
Department of Agricultural Chemistry, Faculty of Agriculture, Tokyo Noko University, Fuchu-shi 183, Japan
Hisanori Kato
Affiliation:
Department of Agricultural Chemistry. Faculty of Agriculture, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
Yutaka Miura
Affiliation:
Department of Agricultural Chemistry. Faculty of Agriculture, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
Hiroshi Naito
Affiliation:
Department of Agricultural Chemistry. Faculty of Agriculture, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
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Abstract

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The relations between the urinary excretion of acid-soluble peptide (ASP)-form amino acids, the rate of whole body protein synthesis and plasma immunoreactive insulin-like growth factor-1/somatomedin C concentration were investigated in rats. The urinary ASP-form leucine plus valine excretion correlated well with the rate of whole body protein synthesis and with the plasma immunoreactive insulin-like growth factor-1 concentration. The results provide further evidence for the hypothesis that urinary excretion of ASP is an excellent index of the status of protein metabolism in animals.

Type
Protein Nutrition and Metabolism
Copyright
Copyright © The Nutrition Society 1990

References

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