Inhibitory Effect of .BETA.-Carotene and Astaxanthin on Photosensitized Oxidation of Phospholipid Bilayers.
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概要
- 論文の詳細を見る
Large unilamellar liposomes comprising of egg yolk phos-phatidylcholine (PC) was exposed to photoirradiation in the presence of methylene blue (water-soluble photosensitizes) or 12-(1-pyrene)dodecan-oic acid (P-12, lipid-soluble photosensitizer) to estimate the inhibitory effect of β-carotene and astaxanthin on photosensitized oxidation of phospholipid bilayers. Without sensitizers, astaxanthin decreased much slower than β-carotene and other hydrocarbon carotenoids (lycopene, a-carotene). Astaxanthin lasted longer than β-carotene even in the presence of methylene blue or P-12. Decrease of astaxanthin was also much slower than that of β-carotene when egg yolk PC was replaced by dimyristoyl PC. However, inhibitory effect of astaxanthin was lower than β-carotene in the case of P-12 sensitized photooxidation. These results suggest that effectiveness of carotenoids as antioxidants on photosensi-tized oxidation (Type II) in phospholipid bilayers depends on the site of singlet oxygen to be generated, as well as their stability on photoirradia-tlon.
- 財団法人 学会誌刊行センターの論文
著者
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Terao Junji
National Food Research Institute Ministry Of Agriculture Forestry And Fisheries
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SAKAMOTO Hideki
Kagome Research Institute, Kagome Co.
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Ojima Fumihiro
Kagome Co. Ltd.
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Ishiguro Yukio
Kagome Co. Ltd.
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OSHIMA Syunji
Kagome Resarch Instute, Kagome Co., Ltd
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ISHIGURO Yukio
Kagome Resarch Instute, Kagome Co., Ltd
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SAKAMOTO Hideki
Kagome Resarch Instute, Kagome Co., Ltd
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