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http://dx.doi.org/10.5657/kfas.2010.43.5.421

Separation and Purification of Antihypertensive Substances from Edible Seaweeds  

Lee, Seung-Joo (Department of Food Processing and Distribution, Gangneung-Wonju National University)
Ha, Wang-Hyun (Department of Food Processing and Distribution, Gangneung-Wonju National University)
Choi, Hye-Jin (Department of Food Processing and Distribution, Gangneung-Wonju National University)
Cho, Soon-Yeong (Department of Food Processing and Distribution, Gangneung-Wonju National University)
Choi, Jong-Won (College of Pharmacy, Kyungsung University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.43, no.5, 2010 , pp. 421-427 More about this Journal
Abstract
To isolate natural antihypertensive substances from edible seaweeds, we screened for and separated active compounds contained in natural Underia pinnatifida, cultural Underia pinnatifida, Laminaria japonica, Sporophylls and Agarum cribrosum. They were extracted using room temperature water, boiling water, acetone, and methanol in turn or using room temperature water, ether, acetone, methanol and boiling water in order. The in vitro antihypertensive activity was quantified as inhibitory efficacy against angiotensin-I converting enzyme (ACE), which is a factor inducing hypertension. For all of the seaweeds tested, the fractions soluble in room temperature water and in boiling water showed the strongest ACE inhibitory effect among the extracted fractions. Conversely, the methanol-extracted fractions for all of the seaweeds tested showed no antihypertensive activity. While the ether and acetone fractions had slight antihypertensive effects. The compounds in the aqueous extracts that had antihypertensive activity were presumed to be polysaccharides, such as fucoidan and alginate.
Keywords
Edible seaweeds; Antihypertensive; ACE inhibitory;
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