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Phlorotannins such as eckol and dieckol have the potential for use for the prevention of hyperlipidemic atherosclerosis.

PMID: 

Arch Pharm Res. 2008 Dec ;31(12):1564-71. Epub 2008 Dec 20. PMID: 19099225

Abstract Title: 

Anti-hyperlipidemic effect of an edible brown algae, Ecklonia stolonifera, and its constituents on poloxamer 407-induced hyperlipidemic and cholesterol-fed rats.

Abstract: 

We conducted this study to isolate novel anti-hyperlipidemic agents derived from natural marine products. To accomplish this, we investigated the effects of ethanolic (EtOH) extracts of Ecklonia stolonifera and its phlorotannin constituents, eckol and dieckol, on serum lipid levels in rats with hyperlipidemia that was induced by a high-cholesterol diet or poloxamer 407. Treatment with the EtOH extracts of E. stolonifera and its phlorotannin-rich ethyl acetate (EtOAc) and n-butanol (n-BuOH) fractions induced a significant reduction in triglycerides (TG), total cholesterol (TC), and low-density lipoprotein-cholesterol (LDL-C) levels, as well as a significant increase in the high-density lipoprotein-cholesterol (HDLC) level in hyperlipidemic rats. However, treatment with the water (H(2)O) fraction did not exert any significant effects on the serum levels of hyperlipidemic rats. In addition, eckol and dieckol isolated from the active EtOAc fraction induced a significant reduction in serum TG, TC, and LDL-C levels, as well as in the atherogenic index (A.I.). Furthermore, treatment with dieckol induced a greater decrease in the serum TG, TC, and LDL-C levels of hyperlipidemic rats than eckol or lovastatin, as well as an increase in the serum HDL-C levels. Taken together, these results suggest that phlorotannins such as eckol and dieckol have the potential for use for the prevention of hyperlipidemic atherosclerosis.

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