title: Effects of total flavonoids and flavonol glycosides from Epimedium koreanum Nakai on the proliferation and differentiation of primary osteoblasts.
abstract: In a bioassay-guided drug screening for anti-osteoporosis activity, eight flavonol glycosides were isolated from Epimedium koreanum Nakai, which is traditionally widely used in China for the treatment of impotence and osteoporosis. The effects of total flavonoids and flavonol glycosides on the proliferation and differentiation of rat calvarial osteoblast-like cells were evaluated by the MTT method and measuring the activity of alkaline phosphatase (ALP activity). Total flavonoids (1.2 x10(-2) to 6.0 x10(-7) mg/ml) and flavonol glycosides (2.0 x10(-5) to 1.0 x10(-9) mol/l) exhibited a strong inhibition on the proliferation of primary osteoblasts at most concentrations. However, the total flavonoids and icariin significantly promoted the differentiation of primary osteoblasts. The results suggested that flavonoids from E. koreanum Nakai may improve the development of osteoblasts by promoting the ALP activity; and icariin might be one of the active constituents facilitating the differentiation of osteoblasts.
authors.affiliation: Department of Natural Products Chemistry, Shenyang Pharmaceutical University, Shenyang 110016, PR China.
authors.forename: D-W
authors.initials: DW
authors.lastname: Zhang
authors.forename: Y
authors.initials: Y
authors.lastname: Cheng
authors.forename: N-L
authors.initials: NL
authors.lastname: Wang
authors.forename: J-C
authors.initials: JC
authors.lastname: Zhang
authors.forename: M-S
authors.initials: MS
authors.lastname: Yang
authors.forename: X-S
authors.initials: XS
authors.lastname: Yao
mesh_terms: D000469:Alkaline Phosphatase / Q000032:analysis / Q000378:metabolism; D000818:Animals; D000831:Animals, Newborn; D002454:Cell Differentiation / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D004353:Drug Evaluation, Preclinical; D004789:Enzyme Activation / Q000187:drug effects; D034181:Epimedium / Q000737:chemistry*; D005419:Flavonoids / Q000302:isolation & purification / Q000494:pharmacology*; D044948:Flavonols / Q000302:isolation & purification / Q000494:pharmacology*; D006027:Glycosides / Q000302:isolation & purification / Q000494:pharmacology*; D051379:Mice; D015394:Molecular Structure; D010006:Osteoblasts / Q000187:drug effects* / Q000201:enzymology; D035261:Plant Components, Aerial / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry; D051381:Rats
chemical_list: D005419:Flavonoids; D044948:Flavonols; D006027:Glycosides; D000469:Alkaline Phosphatase; C056599:icariin