Influence of Adenine-induced Renal Failure on Tryptophan-niacin Metabolism in Rats
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- FUKUWATARI Tsutomu
- Course of Food Science and Nutrition, Department of Life Style Studies, School of Human Cultures, The University of Shiga Prefecture
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- MORIKAWA Yuko
- Course of Food Science and Nutrition, Department of Life Style Studies, School of Human Cultures, The University of Shiga Prefecture
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- HAYAKAWA Fumiko
- Course of Food Science and Nutrition, Department of Life Style Studies, School of Human Cultures, The University of Shiga Prefecture
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- SUGIMOTO Etsuro
- Course of Food Science and Nutrition, Department of Life Style Studies, School of Human Cultures, The University of Shiga Prefecture
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- SHIBATA Katsumi
- Course of Food Science and Nutrition, Department of Life Style Studies, School of Human Cultures, The University of Shiga Prefecture
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To discover the role of the kidney in tryptophan degradation, especially tryptophan to niacin, rat kidneys were injured by feeding a diet containing a large amount of adenine. The kidney contains very high activity of aminocarboxymuconate-semialdehyde decarboxylase (ACMSD), which leads tryptophan into the glutaric acid pathway and then the TCA cycle, but not to the niacin pathway. On the other hand, kidneys contain significant activity of quinolinate phosphoribosyltransferase (QPRT), which leads tryptophan into the niacin pathway. The ACMSD activity in kidneys were significantly lower in the adenine group than in the control group, while the QPRT activity was almost the same, however, the formations of niacin and its compounds such as N1-methylnicotinamide and its pyridones did not increase, and therefore, the conversion ratio of tryptophan to niacin was lower in the adenine group than in the control group. The contents of NAD and NADP in liver, kidney, and blood were also lower in the adenine group. The decreased levels of niacin and the related compounds were consistent with the changes in the enzyme activities involved in the tryptophan-niacin metabolism in liver. It was concluded from these results that the conversion of tryptophan to niacin is due to only the liver enzymes and that the role of the kidney would be extremely low.
収録刊行物
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- Bioscience, Biotechnology, and Biochemistry
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Bioscience, Biotechnology, and Biochemistry 65 (10), 2154-2161, 2001
公益社団法人 日本農芸化学会
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詳細情報 詳細情報について
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- CRID
- 1390001206476005248
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- NII論文ID
- 110002693254
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- NII書誌ID
- AA10824164
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- COI
- 1:CAS:528:DC%2BD3MXotFantbc%3D
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- ISSN
- 13476947
- 09168451
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- NDL書誌ID
- 5969020
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- PubMed
- 11758903
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可