An angiotensin-I converting enzyme inhibitor from buckwheat (Fagopyrum esculentum Moench) flour |
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Authors: | Aoyagi Yasuo |
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Institution: | Kagawa Nutrition University, 3-9-21 Chiyoda, Sakado, Saitama 350-0288, Japan. aoyagi@eiyo.ac.jp |
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Abstract: | A compound that inhibited angiotensin-I converting enzyme (ACE) activity was isolated from buckwheat powder. This compound is thought to be the hydroxy derivative of nicotianamine and its chemical structure is 2'-hydroxynicotianamine. This compound showed a very high inhibitory activity toward ACE, and the IC(50) was 0.08 microM. Only this hydroxy analog was found in buckwheat powder, at about 30 mg/100g, and no nicotianamine was detected. However, nicotianamine was detected in the buckwheat plant body. 2'-hydroxynicotianamine was also found in other polygonaceous plants. |
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Keywords: | Buckwheat Fagopyrum esculentum Polygonaceae ACE inhibitor Hypotension Non-protein amino acid Phytosiderophore Nicotianamine 2″-Hydroxynicotianamine |
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