Effects of Dietary Casein and Adrenal Hormone on the Dietary Induction of α-Amino-β-carboxymuconate-ε-semialdehyde Decarboxylase Activity in Rat
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概要
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The effects of dietary casein and adrenal hormone on the dietary induction of α-amino-β-carboxymuconate-ε-semialdehyde decarboxylase (ACMSDase) activity in rat liver and kidneys were examined. Of three levels of casein in the diet examined (7.5%, 15% and 30%), only the feeding of a 30% casein diet to normal rats after three days on a protein-free diet resulted in a significant increase in the activity of ACMSDase in liver and kidneys on the following morning. The degree of the increase in this activity was higher in the liver than the kidneys. Dietary induction of ACMSDase activity disappeared when rats were adrenalectomized six days prior to the start of the experiment. In sham-operated rats, dietary induction of liver ACMSDase activity was as high as that in normal rats, however, that in kidneys disappeared. Prednisolone (synthetic adrenal hormone with glucocorticoid activity) injection of adrenalectomized rats led to the recovery of the dietary induction of liver ACMSDase activity. Blood serum corticosterone levels in normal rats on the last day of the feeding period remained maximum and then decreased gradually until 04: 00, and tended to be higher in rats fed a protein-free diet than in those fed a 30% casein diet. These results suggest that the dietary induction of ACMSDase activity occurs only when a sufficient amount of dietary casein is ingested in the presence of a physiologically significant concentration of blood serum glucocorticoid in rats.
- 社団法人 日本農芸化学会の論文
著者
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Iwai Kazuo
Laboratory Of Nutrition Chemistry Faculty Of Home Economics Kobe Women's University
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Hayakawa Takashi
Laboratory Of Nutritional Chemistry Department Of Food Science And Technology Faculty Of Agriculture
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Hayakawa Takashi
Laboratory of Nutritional Chemistry, Department of Food Science and Technology, Faculty of Agriculture, Kyoto University
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