Role of Amino Acid-catabolizing Enzymes in Urea Synthesis for Rats Treated with the Thyroid Hormone
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概要
- 論文の詳細を見る
The purpose of the present study was to determine whether the regulation of urea synthesis was mediated through the supply of nitrogen by amino acid-catabolizing enzymes and whether the concentration of acetylCoA would control the N-acetylglutamate concentration when the thyroid status was manipulated. Experiments were conducted on three groups of rats, each being given 6-propyl-2-thiouracil (PTU, thyroid inhibitor) without a triiodothyronine (T_3) treatment, or PTU + T_3, or neither PTU nor T_3 (control), respectively. The urinary excretion of urea, the liver concentration of N-acetylglutamate, and the hepatic activities of serine dehydratase, threonine dehydratase, alanine transaminase (GPT) and aspartate transaminase (GOT) in rats given PTU + T_3 were significantly lower than those in rats given PTU alone. The activity of glutamate dehydrogenase, and the concentrations of free amino acids and acetylCoA in the liver of the PTU + T_3-treated group were significantly higher than those in the group treated with PTU alone. These results suggest that the higher activity of amino acid-catabolizing enzymes in the hypothyroid (with PTU alone) rats is likely to stimulate urea synthesis.
- 社団法人日本農芸化学会の論文
- 1993-10-23
著者
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HAYASE Kazutoshi
Department of Home Economics, Aichi University of Education
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YOSHIDA AKIRA
Department of Radiological Sciences, Hiroshima Prefectural College of Health Science
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Hayase Kazutoshi
Department Of Home Economics Aichi University Of Education
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Hayase K
Department Of Home Economics Aichi University Of Education
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Yoshida Akira
Department Of Cardiology Kyoto National Hospital
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Yoshida Akira
Department Of Agricultural Chemistry Nagoya University
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