Eisenia bicyclis

Kousaka K, Ogi N, Akazawa Y, Fujieda M, Yamamoto Y, Takada Y, Kimura J (2003) Novel Oxylipin Metabolites from the Brown Alga Eisenia bicyclis. J Nat Prod 66 1318... 

Alaha esculenta, A. marginata Ascophyllum nodosum Dictyopteris divaricata Ecklonia maxima Eisenia bicyclis... 

In the past four decades, researchers have foimd that soluble dietary fibers are negatively associated with obesity. Marine algae is particularly rich in two different types of fiber, soluble and insoluble (Table 4.1 Lahaye, 1991). Eisenia bicyclis, sometimes referred as Arame, contained more than 50% soluble fiber of its dry weight the other brown algae species, F. vesiculosus, contained aroimd 40% insoluble fiber per dry weight (Lahaye, 1991 Ruperez and Saura-Calixto, 2001). In human... 

Kousaka, K., Ogi, N., Akazawa, Y., Fujieda, M., Yamamoto, Y., Takada, Y., and Kimura, J. (2003). Novel oxyUpin metabolites from the brown alga Eisenia bicyclis. J. Nat. Prod. 66, 1318-1323. 

The structure of the laminaran from Eisenia bicyclis has been determined by methylation and periodate ion oxidation analyses as well as by and n.m.r. spectroscopies. The polysaccharide possessed a branched structure with both (1- 3)- and (16)- 3-D-glucopyranose residues being present in the ratio of 3 2. 

Definition Seaweeds of Analipus japonicus, Eisenia bicyclis, Hizikia fusiforme, Kjellmaniella gyrata, Laminaria angustata, L. claustonia, L. digitata, L japonica, L. longicruris, Macrocystis pyrifera, etc. 

On the other hand, a peptidelike substance, eisenin, was isolated by Ohira (440,441,442) from Eisenia bicyclis, using, a similar procedure to that of Haas. On hydrolysis it yielded L-alanine L-glutamic acid, and ammonia. Ohira formulated eisenin as pyrrolidonoylglutaminylalanine. This conclusion has been criticized by Tazawa (582). 

A new series of macrolactones derived from stearidonic acid was characterized in another species harvested on the Japanese coast, Eisenia bicyclis, and all are related to ecklonialactones or cymathere ethers. Moreover, some of these are chlorinated (eiseniachlorides A-B) or iodin-ated (eiseniaiodides A-B). A general biogenetic scheme explains the formation of all these oxylipins from stearidonic acid (Kousaka et at., 2003). AH of the halogenated oxylipins show moderate antibacterial activity against Bacillus subtilis and Staphylococcus aureus. 

KAMEi Y and AOKi M (2007), A chlorophyll c2 analogue from the marine brown alga Eisenia bicyclis inactivates the infectious hematopoietic necrosis virus, a fish rhabdovirus . Arch Virol, 152,861-869. 

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