title: [In vitro induction studies of YouGui drink on culture of steroid induced necrosis of femoral head rat osteoblast].
abstract: OBJECTIVE
  On the basis of YouGui drink ([Chinese characters: see text]) to act on the normal rats in vitro osteoblast proliferation and differentiation, further observe YooGui drink ([Chinese characters: see text]) inductive effect for steroid induced necrosis of femoral head rats in vitro on cultivation of osteoblast proliferation and differentiation.
  
  
  METHODS
  Prednisolone acetate 49 mg/kg x d were injected into gluteal of 20 male SD rats (body weight in 100-120 g), continuously 6 days for model. After 7 days, under sterile conditions from the model rats bone marrow stromal cells were induced and cultured to osteoblast, and then randomly divided into 4 groups, respectively, add the high, medium and low concentration YouGui drink ([Chinese characters: see text]) containing serum (group R1, R2, R3) and control serum (group R4). After 72 h, osteoblast proliferation, alkaline phosphatase activities (APA) were detected, and expression level of osteoprotegerin (OPG) and osteoclast differentiation factor (RANKL) were detected by real-time fluorescence quantitative PCR.
  
  
  RESULTS
  The high and medium concentration YouGui drink ([Chinese characters: see text]) containing serum group compared with the control group (R1, R2 vs. R4), the rate of osteoblast proliferation was significantly high (P < 0.01), APA significantly increased (P < 0.01), relative expression level of osteoblast OPG mRNA significantly increased (P < 0.01), and with the concentration of a certain dose was positively correlated; RANKL mRNA significantly was lower (P < 0.01). The low concentration YouGui drink (t 91 t) containing serum group compared with the control group (R3 vs R4), there was no significantly different in the rate of osteoblast proliferation, ALP and relative expression level of osteoblast OPG mRNA, RANKL mRNA.
  
  
  CONCLUSIONS
  The high concentration of YouGui drink ([Chinese characters: see text]) containing serum can obviously promote the proliferation and differentiation of steroid induced necrosis of femoral head rats in vitro osteoblast, and plays a clear role in promoting and enhance the relative expression of osteoblast OPG mRNA and an inhibitory effect on RANKL mRNA. The effect of YouGui drink ([Chinese characters: see text]) containing serum acting on induced in vitro cultured osteoblasts have relevance with dose, at a certain concentration range it can promote osteoblast differentiation and proliferation.
authors.affiliation: Department of Orthopaedics, Traditional Chinese Medical Hospital of Zhejiang Province, Hangzhou 310006, Zhejiang, China. tongpeijian@163.com
authors.forename: Pei-jian
authors.initials: PJ
authors.lastname: Tong
authors.forename: Liang
authors.initials: L
authors.lastname: Xu
authors.forename: Bai-song
authors.initials: BS
authors.lastname: Hu
authors.forename: Honlg-ting
authors.initials: HT
authors.lastname: Jin
authors.forename: Tao-ye
authors.initials: TY
authors.lastname: Li
authors.forename: Xiang
authors.initials: X
authors.lastname: Fang
mesh_terms: D000818:Animals; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D004326:Drinking; D004365:Drugs, Chinese Herbal / Q000494:pharmacology* / Q000627:therapeutic use; D005271:Femur Head Necrosis / Q000139:chemically induced* / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology*; D005786:Gene Expression Regulation / Q000187:drug effects; D008297:Male; D010006:Osteoblasts / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology*; D053244:Osteoprotegerin / Q000235:genetics; D053245:RANK Ligand / Q000235:genetics; D051381:Rats; D017207:Rats, Sprague-Dawley; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013256:Steroids / Q000494:pharmacology*
chemical_list: D004365:Drugs, Chinese Herbal; D053244:Osteoprotegerin; D053245:RANK Ligand; D013256:Steroids