title: Effect of vitamin K2 (menatetrenone) on osteoclast-like cell formation in mouse bone marrow cultures.
abstract: The effects of menatetrenone, a vitamin K2 homologue, on osteoclast-like cell formation in mouse bone marrow culture were investigated. After 7 days of incubation, menatetrenone at 10(-6) M, 3 x 10(-6) M and 10(-5) M dose dependently inhibited the tartrate-resistant acid phosphatase-positive multinucleated cell formation induced by 1,25-dihydroxyvitamin D3 (1,25(OH)2D3). The addition of menatetrenone for the last 3 days of the 7-day incubation period was required to inhibit formation of multinucleated cells in response to 1,25(OH)2D3. Moreover, the addition of 1,25(OH)2D3 for the last 3 days was essential for multinucleated cell formation, and this activity was markedly inhibited by the simultaneous addition of menatetrenone. The inhibitory effects of menatetrenone on multinucleated cell formation may contribute to its ameliorative action on bone loss in vivo, and may indicate a new mechanism of vitamin K2 activity in bone metabolism.
authors: Department of Drug Research II, Eisai Co., Ltd., Tokyo, Japan.
authors: Y
authors: Y
authors: Akiyama
authors: K
authors: K
authors: Hara
authors: T
authors: T
authors: Tajima
authors: S
authors: S
authors: Murota
authors: I
authors: I
authors: Morita
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism; D000818:Animals; D001853:Bone Marrow / Q000187:drug effects*; D001854:Bone Marrow Cells; D002117:Calcitriol / Q000494:pharmacology; D002454:Cell Differentiation / Q000187:drug effects; D002478:Cells, Cultured; D015726:Giant Cells / Q000201:enzymology; D006490:Hemostatics / Q000494:pharmacology*; D051379:Mice; D010010:Osteoclasts / Q000166:cytology*; D014812:Vitamin K / Q000031:analogs & derivatives* / Q000494:pharmacology; D024482:Vitamin K 2 / Q000031:analogs & derivatives
chemical_list: D006490:Hemostatics; D024482:Vitamin K 2; D014812:Vitamin K; C030814:menatetrenone; D000135:Acid Phosphatase; D002117:Calcitriol