The perichondrial ring as a reservoir for precartilaginous cells. In vivo model in young chicks' epiphysis

Int Orthop. 2006 Oct;30(5):353-6. doi: 10.1007/s00264-006-0082-2. Epub 2006 Apr 28.

Abstract

Background: The purpose of this study is to illustrate the routes of migration of precartilaginous cells from the perichondrial ring of LaCroix, as a potential reservoir for growth-plate germ cells.

Methods: Chondrocytes derived from the ring of LaCroix of young chicks' proximal tibia were cultured in vitro and transfected with adenovirus vector containing the gene encoding for Escherichia coli (beta)-galactosidase (lacZ) gene, which allows assessment of the migratory routes of these cells. The lacZ- transfected cells were injected back into the perichondrial ring of LaCroix of young chicks' proximal tibias. Four weeks later the migration root was assessed microscopically.

Results: Injection of cells derived from the ring of LaCroix of neonate chicks, transfected in culture with adenoviruses containing LacZ reporter gene, allows the assessment of migratory potential of these cells. Stained cells were found at the outer layer of the epiphysis, particularly in areas adjacent to the perichondrial ring. Further longitudinal histopathological studies along the bone axis demonstrated a condensed layer of the stained cells arranged horizontally along parts of the physis.

Conclusion: The perichondrial ring of LaCroix represents a potential reservoir of growth-plate germ cells in young chicks.

Le but de cette étude est d’étudier la circulation des cellules souches précartilagineuses provenant de la virole périchondrale de LaCroix considérée comme un réservoir potentiel de ces cellules. Méthode: les chondrocytes provenant de la virole périchondrale de LaCroix prélevés au niveau de l’extrémité supérieure du tibia chez de jeunes poulets ont été cultivés in vitro et transplantés à l’aide d’un adénovirus codant le gène beta galactosidase (lacZ). Les cellules lacZ ainsi transplantées ont été injectées dans la virole périchondrale de l’extrémité supérieure du tibia des mêmes poulets. Quatre semaines après, les migrations cellulaires ont été étudiées au microscope. Résultats: les migrations de ces cellules ont été vérifiées sur le plan histopathologique. Conclusion: On peut affirmer que la virole périchondrale de LaCroix est un réservoir potentiel de cellules souches de croissance chez les jeunes poulets.

MeSH terms

  • Adenoviridae / genetics
  • Animals
  • Cartilage / cytology*
  • Cell Movement*
  • Chickens
  • Chondrocytes / chemistry
  • Chondrocytes / cytology
  • Chondrocytes / physiology*
  • Epiphyses / cytology
  • Genes, Reporter
  • Growth Plate / cytology*
  • Growth Plate / growth & development*
  • Osteogenesis*
  • Tibia / cytology
  • beta-Galactosidase / analysis
  • beta-Galactosidase / genetics

Substances

  • beta-Galactosidase