title: Improved Bone Regeneration With Multiporous PLGA Scaffold and BMP-2-Transduced Human Adipose-Derived Stem Cells by Cell-Permeable Peptide.
abstract: OBJECTIVE
  Currently, much work has focused on the engineering of bone using adipose-derived stem cells (ADSCs), which differentiate into osteogenic cells. This study was conducted to assess the bone-regenerating capacity of ADSCs with genetic modification.
  
  
  METHODS
  ADSCs were cultured and transduced with recombinant adenovirus-expressing bone morphogenetic protein-2 (rAd/BMP-2). Two 5-mm full-thickness bone defects were created on the parietal bones of 24 rats. The defects were left empty (n = 12), restored with a scaffold alone (n = 12), transplanted with ADSCs in osteogenic media (n = 12), or transplanted with rAd/BMP-2-transduced ADSCs (n = 12). Six defects from each group were assessed by histologic observation, histomorphometric analysis, and microcomputed tomography (micro-CT) imaging at 4 and 8 weeks after transplantation.
  
  
  RESULTS
  Increased new bone formation was observed in the rAd/BMP-2-transduced ADSC groups, compared with the other groups. On micro-CT, significant differences were noted in bone volume-to-tissue volume ratios between rAd/BMP-2-transduced ADSCs group and the other groups at both time points (P < 0.05).
  
  
  CONCLUSIONS
  The result demonstrates that transferring BMP-2 promotes the osteogenic differentiation of ADSCs and enhances bone regeneration. Under limitation of this study, genetic modification of ADSCs with BMP-2 could be adopted in clinical application.
authors.affiliation: *Assistant Professor, Department of Oral and Maxillofacial Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea. †Graduate Student, Department of Oral and Maxillofacial Surgery, Graduate School of Clinical Dental Science, The Catholic University of Korea, Seoul, Korea. ‡Professor, Department of Oral and Maxillofacial Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea.
authors.forename: Suhyun
authors.initials: S
authors.lastname: Park
authors.forename: Hyun-A
authors.initials: HA
authors.lastname: Heo
authors.forename: Kwang-Bae
authors.initials: KB
authors.lastname: Lee
authors.forename: Han-Goo
authors.initials: HG
authors.lastname: Kim
authors.forename: Sung-Woon
authors.initials: SW
authors.lastname: Pyo
mesh_terms: D000273:Adipose Tissue / Q000166:cytology*; D000818:Animals; D055396:Bone Morphogenetic Protein 2 / Q000494:pharmacology*; D001861:Bone Regeneration / Q000187:drug effects / Q000502:physiology*; D002454:Cell Differentiation / Q000187:drug effects / Q000502:physiology; D018014:Gene Transfer Techniques; D006801:Humans; D019344:Lactic Acid / Q000378:metabolism; D008297:Male; D011100:Polyglycolic Acid / Q000378:metabolism; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D017207:Rats, Sprague-Dawley; D012886:Skull / Q000601:surgery; D013234:Stem Cells / Q000187:drug effects / Q000502:physiology*; D054457:Tissue Scaffolds; D055114:X-Ray Microtomography
chemical_list: C525718:BMP2 protein, human; D055396:Bone Morphogenetic Protein 2; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid