title: Initial adhesion of bone marrow stromal cells to various bone graft substitutes.
abstract: OBJECTIVE
  The aim of this study is to determine whether certain biomaterials have the potential to support cell attachment. After seeding bone marrow stromal cells onto the biomaterials, we investigated their responses to each material in vitro.
  
  
  METHODS
  Rat bone marrow derived stromal cells were used. The biomaterials were deproteinized bovine bone mineral (DBBM), DBBM coated with fibronectin (FN), synthetic hydroxyapatite (HA), HA coated with FN, HA coated with β-tricalcium phosphate (TCP), and pure β-TCP. With confocal laser scanning microscopy, actin filaments and vinculin were observed after 6, 12, and 24 hours of cell seeding. The morphological features of cells on each biomaterial were observed using scanning electron microscopy at day 1 and 7.
  
  
  RESULTS
  The cells on HA/FN and HA spread widely and showed better defined actin cytoskeletons than those on the other biomaterials. At the initial phase, FN seemed to have a favorable effect on cell adhesion. In DBBM, very few cells adhered to the surface.
  
  
  CONCLUSIONS
  Within the limitations of this study, we can conclude that in contrast with DBBM not supporting cell attachment, HA provided a more favorable environment with respect to cell attachment.
authors.affiliation: Department of Periodontology, Seoul National University School of Dentistry, Seoul, Korea.
authors.forename: Young-Jae
authors.initials: YJ
authors.lastname: Jo
authors.forename: Kyoung-Hwa
authors.initials: KH
authors.lastname: Kim
authors.forename: Ki-Tae
authors.initials: KT
authors.lastname: Koo
authors.forename: Tae-Il
authors.initials: TI
authors.lastname: Kim
authors.forename: Yang-Jo
authors.initials: YJ
authors.lastname: Seol
authors.forename: Yong-Moo
authors.initials: YM
authors.lastname: Lee
authors.forename: Young
authors.initials: Y
authors.lastname: Ku
authors.forename: Chong-Pyoung
authors.initials: CP
authors.lastname: Chung
authors.forename: In-Chul
authors.initials: IC
authors.lastname: Rhyu