Drynariae Rhizoma promotes osteoblast differentiation and mineralization in MC3T3-E1 cells through regulation of bone morphogenetic protein-2, alkaline phosphatase, type I collagen and collagenase-1.
In a previous study (Jeong et al., 2003, Inhibition of Drynariae Rhizoma extracts on bone resorption mediated by processing of cathepsin K in cultured mouse osteoclasts. International Immunopharmacology 3, 1685-1697), treatment of osteoclasts-containing long bone cells with Drynariae Rhizoma (DR) extract prevented the intracellular maturation of cathepsin K and thus, it was considered that DR is a pro-drug of a potent bone resorption inhibitor. To further clarify the role of DR in ossification, we investigated the effects of DR on the proliferation and differentiation of osteoblastic cell lines in vitro. In this study, the bone effect of DR is studied. We assessed the effects of DR on osteoblastic differentiation in nontransformed osteoblastic cells (MC3T3-E1) and rat bone marrow cells. DR enhanced alkaline phosphatase (ALP) activity and mineralization in a dose- and time-dependent fashion. This stimulatory effect of the DR was observed at relatively low doses (significant at 50-150 microg/ml and maximal at 150 microg/ml). Northern blot analysis showed that the DR (100 microg/ml) increased in bone morphogenetic protein-2 as well as ALP mRNA concentrations in MC3T3-E1 cells. DR (60 microg/ml) slightly increased in type I collagen mRNA abundance throughout the culture period, whereas it markedly inhibited the gene expression of collagenase-1 between days 15 and 20 of culture. These results indicate that DR has anabolic effects on bone through the promotion of osteoblastic differentiation, suggesting that it could be used for the treatment of common metabolic bone diseases such as osteoporosis.
Department of Internal Medicine, Biochemistry and Molecular Biology, College of Oriental Medicine, Dongguk University and National Research Laboratory for Glycobiology, 707 Sukjang-Dong, Kyungju, Kyungbuk 780-714, Republic of Korea.
Ji-Cheon
JC
Jeong
Jae-Wook
JW
Lee
Cheol-Ho
CH
Yoon
Hyung-Min
HM
Kim
Cheorl-Ho
CH
Kim
D000469:Alkaline Phosphatase / Q000494:pharmacology; D000818:Animals; D001854:Bone Marrow Cells / Q000502:physiology; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins / Q000096:biosynthesis; D018929:Cell Culture Techniques; D002454:Cell Differentiation / Q000187:drug effects* / Q000502:physiology; D024042:Collagen Type I / Q000096:biosynthesis; D017364:Collagenases / Q000096:biosynthesis / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D008297:Male; D051379:Mice; D010006:Osteoblasts / Q000187:drug effects*; D010012:Osteogenesis / Q000187:drug effects*; D010024:Osteoporosis / Q000188:drug therapy; D010936:Plant Extracts / Q000494:pharmacology; D029621:Polypodiaceae / Q000737:chemistry*; D012333:RNA, Messenger / Q000032:analysis; D051381:Rats; D017207:Rats, Sprague-Dawley; D016212:Transforming Growth Factor beta / Q000096:biosynthesis
C525719:Bmp2 protein, mouse; C525720:Bmp2 protein, rat; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins; D024042:Collagen Type I; D010936:Plant Extracts; D012333:RNA, Messenger; D016212:Transforming Growth Factor beta; D000469:Alkaline Phosphatase; D017364:Collagenases; C417249:collagenase 1