title: [Comparative study on effects of rutin and quercetin on metabolism in osteoblast cells].
abstract: OBJECTIVE
  To investigate the mechanism of rutin and its aglycone (quercetin) in preventing and treating osteoporosis and their effects on stimulating bone formation were studied comparatively in osteoblast cells.
  
  
  METHODS
  The effects of rutin and quercetin on the proliferation, differentiation and mineralization were studied respectively by using tetrazolium (MTT), alkaline phosphatase (ALP) and mineralized nodules assays in newborn rat calvarial osteoblast (ROB) cells.
  
  
  RESULTS
  Quercetin showed significant stimulatory effects on proliferation and mineralization in ROB cells, so it could promote bone formation. However, rutin could not imporve stimulation of bone formation because it increased proliferation and inhibited differentation and had no remarkable influence on ROB cells in vitro.
  
  
  CONCLUSIONS
  Rutin showed less activity than quercetin on bone formation in ROB cells in vitro. Therefore the mechanism that some foods and traditional Chinese medicine containing rutin can prevent and treat osteoporosis is that its metaboite in vivo can promote bone formation in ROB cells.
authors.affiliation: Department of Traditional Chinese Medicine, China Pharmaceutical University, Nanjing 210038, China. yangyajunl@163.com
authors.forename: Ya-jun
authors.initials: YJ
authors.lastname: Yang
authors.forename: Zhong-lin
authors.initials: ZL
authors.lastname: Yang
authors.forename: Dong-chun
authors.initials: DC
authors.lastname: Wang
authors.forename: Xiao-chun
authors.initials: XC
authors.lastname: Xiao
authors.forename: Ping
authors.initials: P
authors.lastname: Li
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism; D000818:Animals; D002113:Calcification, Physiologic / Q000187:drug effects; D002454:Cell Differentiation / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects*; D002478:Cells, Cultured; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D010006:Osteoblasts / Q000187:drug effects* / Q000378:metabolism; D010024:Osteoporosis / Q000517:prevention & control; D011794:Quercetin / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D012431:Rutin / Q000494:pharmacology*
chemical_list: D004365:Drugs, Chinese Herbal; D012431:Rutin; D011794:Quercetin; D000469:Alkaline Phosphatase