title: Osteogenesis of the construct combined BMSCs with beta-TCP in rat.
abstract: BACKGROUND
  The use of artificial bone graft substitutes has increased as the surgical applications widen and the availability of allograft bone decreases. The present study was to evaluate the construct combined bone marrow stromal cells (BMSCs) with beta-tricalcium phosphate (beta-TCP) as bone substitute implanted in rat dorsal muscles.
  
  
  METHODS
  To study the osteogenic capability in vivo, specimens were harvested on 1 week, 4 weeks and 8 weeks after implantation, and were analyzed by hematoxylin and eosin (HE) staining. The percentages of new bone formation for each implant type and implantation period were determined by histomorphometry.
  
  
  RESULTS
  After 1 week of implantation, new bone formation for both beta-TCP and BMSCs+beta-TCP group had no formed. After 4 weeks of implantation, the amount of bone formation was increased to 1.32 % in beta-TCP group and 6.35% in BMSCs+beta-TCP group. After 8 weeks of implantation, more bone was found in the BMSCs+beta-TCP group (21.58 %), while in the beta-TCP group bone formation was increased to 4.78%. Significant differences between the two groups have been observed.
  
  
  CONCLUSIONS
  Based on these results, we conclude that bone substitutes constructed by porous beta-TCP scaffold loaded with osteogenically induced BMSCs could promote newly formed bone.
authors.affiliation: Department of Orthopedics, Second Affiliated Hospital Xi'an Jiao Tong University, Xiwu Road, NO 157, Xi'an, shaanxi 710004, PR China.
authors.forename: Mingyu
authors.initials: M
authors.lastname: Zhang
authors.forename: Kunzheng
authors.initials: K
authors.lastname: Wang
authors.forename: Zhibin
authors.initials: Z
authors.lastname: Shi
authors.forename: Huaqing
authors.initials: H
authors.lastname: Yang
authors.forename: Xiaoqian
authors.initials: X
authors.lastname: Dang
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D001672:Biocompatible Materials; D001854:Bone Marrow Cells / Q000166:cytology*; D018786:Bone Substitutes / Q000494:pharmacology*; D002130:Calcium Phosphates / Q000494:pharmacology*; D010012:Osteogenesis / Q000502:physiology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D017154:Stromal Cells / Q000166:cytology*; D023822:Tissue Engineering / Q000379:methods
chemical_list: D001672:Biocompatible Materials; D018786:Bone Substitutes; D002130:Calcium Phosphates; C485817:beta-tricalcium phosphate