Isolation and partial characterization of fucan sulfates from the body wall of sea cucumber Stichopus japonicus and their ability to inhibit osteoclastogenesis.
Two types of fucan sulfate were isolated from chloroform/methanol extract of the body wall of the sea cucumber Stichopus japonicus. One type (type A) contained 3.41 mmol fucose/g and 2.35 mmol sulfate/g, and the molecular mass was determined to be 9 kDa by gel permeation chromatography (GPC). Structural analysis suggested that type A consists of a backbone of (1-->3)-linked fucosyl residues that are substituted at C-4 with fucosyl residues, and that fucosyl residues are sulfated at C-2 and/or C-4. Another type (type B) contained 3.90 mmol fucose/g and 3.07 mmol sulfate/g, and the molecular mass was determined to be 32kDa by GPC. Structural analysis showed that type B is largely composed of unbranched (1-->3)-linked fucosyl residues, and that sulfate substitution(s) occur at C-2 and/or C-4. The potential of both types to inhibit osteoclastogenesis was examined by an in vitro assay system, showing that both types of fucan sulfate inhibit osteoclastogenesis more than 95% at 50 microg/mL concentration. These results suggest that types A and B fucan sulfate from sea cucumber are potent inhibitors of osteoclastogenesis.
Kariya
Yutaka
Y
Central Research Laboratories, Seikagaku Corporation, 3-1253 Tateno, Higashiyamato, Tokyo 207-0021, Japan. kariya@seikagaku.co.jp
Mulloy
Barbara
B
Imai
Kyoko
K
Tominaga
Akihiro
A
Kaneko
Takuji
T
Asari
Akira
A
Suzuki
Kiyoshi
K
Masuda
Hiroyuki
H
Kyogashima
Mamoru
M
Ishii
Tadashi
T
D000818:Animals; D001681:Biological Assay; D001862:Bone Resorption / Q000188:drug therapy; D015394:Molecular Structure; D010010:Osteoclasts / Q000187:drug effects*; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D047528:Stichopus / Q000737:chemistry*
D011134:Polysaccharides; C007789:fucoidan