J Knee Surg 2005; 18(1): 31-42
DOI: 10.1055/s-0030-1248155
Original Article

© 2005 Thieme Medical Publishers

In Vivo Transplantation of Neonatal Ovine Neocartilage Allografts – Determining the Effectiveness of Tissue Transglutaminase

Yan Lu1 , H. Davis Adkisson2 , John Bogdanske1 , Vicki Kalscheur1 , William Maloney3 , Regina Cheung4 , Alan J. Grodzinsky4 , Keith A. Hruska2, 3 , Mark D. Markel1
  • 1The School of Veterinary Medicine, University of Wisconsin-Madison, Wisc
  • 2Isto Technologies Inc, St Louis, Mo
  • 3Washington University Medical School, St Louis, Mo
  • 4The Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Mass
Weitere Informationen


27. Januar 2010 (online)


Following transplantation of ovine neocartilage allografts, 26 sheep were divided into groups according to the following weight-bearing schedule: 8-week nonweight bearing (8NWB, n=14), and 8-week nonweight bearing+4-week weight bearing (8NWB+4WB, n=12). In addition, 7 and 6 sheep, respectively, in the 8NWB and 8NWB+4WB groups received tTG treatment after allograft transplantation, whereas the remaining 13 sheep in these groups did not receive tTG. Finally, 8 sheep served as sham-operated controls without allograft transplantation. After euthanasia, stifle joints were harvested for the analysis of gross appearance, chondrocyte viability, histology, and biomechanical testing.

No significant differences were noted in macroscopic graft survival and union with host tissue in both 8NWB and 8NWB+4WB groups between the tTG treated and non-tTG treated animals. Analysis of histological scores demonstrated no significant difference between tTG and non-tTG treatments in both 8NWB and 8NWB+4WB groups. Confocal laser microscopic analysis of the explanted defects revealed 70%-100% cell viability in all treatment groups.

This study shows that allogeneic chondrocytes harvested from neonatal donors provide sufficient metabolic activity to affect repair. Use of tTG to augment resorbable suture fixation of neocartilage grafts provided no advantage over suture alone in this pilot study.