Antioxidant and Free Radical Scavenging Properties of Marennine, a Blue-Green Polyphenolic Pigment from the Diatom Haslea ostrearia (Gaillon/Bory) Simonsen Responsible for the Natural Greening

详细信息    查看全文

• 作者：Jean-Bernard Pouvreau ; Michè ; le Moranç ; ais ; Fre&#769 ; de&#769 ; ric Taran ; Philippe Rosa ; Laurent Dufosse&#769 ; Fabienne Gue&#769 ; rard ; Serge Pin ; Joë ; l Fleurence ; Pierre Pondaven
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2008
• 出版时间：August 13, 2008
• 年：2008
• 卷：56
• 期：15
• 页码：6278-6286
• 全文大小：265K
• 年卷期：v.56,no.15(August 13, 2008)
• ISSN：1520-5118

文摘

Among microalgae, the marine diatom Haslea ostrearia has the distinctive feature of synthesizing and releasing, into the surrounding environment, a blue-green polyphenolic pigment called marennine. The oyster-breeding industry commonly makes use of this natural phenomenon for the greening of oysters grown in the ponds of the French Atlantic coast. This article reports the in vitro antioxidant properties of pure marennine. Two kinds of evaluation systems were adopted to test the antioxidative activity of marennine: antioxidant capacity assays (β-carotene and thymidine protection assays and iron reducing power assay) and free radical scavenging assays (DPPH^·, O₂^·−, and HO^·). In almost all cases, marennine exhibited significantly higher antioxidative and free radical scavenging activities than natural and synthetic antioxidants commonly used in food, as shown by comparing median effective concentration (EC₅₀) values, for each test independently. This medium molecular weight polyphenol (around 10 kDa) from microalgae is thus a potentially useful natural antioxidant. Because of its blue-coloring property and water solubility, it could also be used as a natural food-coloring additive.