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Effects of Phytoecdysteroid on the Proliferation and Activity of Bone Cells  

Ko, Seon-Yle (Department of Oral Biochemistry, School of Dentistry, Dankook University)
Publication Information
Journal of Oral Medicine and Pain / v.32, no.2, 2007 , pp. 129-135 More about this Journal
Abstract
Ecdysteroids are known as insect molting hormone. At the same time, ecdysteroids and plant ecdysteroids (phytoecdysteorids) reveal beneficial effects on mammal. The present study was undertaken to determine the possible cellular mechanism of action of phytoecdysteroids in bone metabolism. The effects on the osteoblasts were determined by measuring cell proliferation, alkaline phosphatase (ALP) activity, and gelatinase activity. The effects on the osteoclasts were investigated by measuring tartrate-resistant acid phosphatase (TRAP)(+) multinucleated cells (MNCs) formation after culturing osteoclast precursors. Phytoecdysteroid treatment showed a increase in ALP activity of osteoblasts. Phytoecdysteroid increased the activity of gelatinase. In addition, phytoecdysteroid decreased the osteoclast generation induced by macrophage-colony stimulating factor (M-CSF) and receptor activator of NF-kB ligand (RANKL) in (M-CSF)-dependent bone marrow macrophage (MDBM) cell cultures. Taken these results, phytoecdysteroid may be a regulatory protein within the bone marrow microenvironment.
Keywords
Osteoblast; Osteoclast; Phytoecdysteroid;
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