Implantation of canine umbilical cord blood-derived mesenchymal stem cells mixed with beta-tricalcium phosphate enhances osteogenesis in bone defect model dogs.
- Author:
Byung Jun JANG
1
;
Ye Eun BYEON
;
Ji Hey LIM
;
Hak Hyun RYU
;
Wan Hee KIM
;
Yoshihisa KOYAMA
;
Masanori KIKUCHI
;
Kyung Sun KANG
;
Oh Kyeong KWEON
Author Information
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords: beta-TCP; dog; mesenchymal stem cell; osteogenesis; umbilical cord blood
- MeSH: Animals; Biocompatible Materials/metabolism/therapeutic use; Bone Substitutes/*therapeutic use; Calcium Phosphates/*therapeutic use; Dogs; Fetal Blood/*cytology; Fracture Fixation/methods/veterinary; Mesenchymal Stem Cells/*physiology; Osteogenesis/*physiology; Tissue Engineering/methods; Wound Healing/physiology
- From:Journal of Veterinary Science 2008;9(4):387-393
- CountryRepublic of Korea
- Language:English
- Abstract: This study was performed to evaluate the osteogenic effect of allogenic canine umbilical cord blood-derived mesenchymal stem cells (UCB-MSCs) mixed with beta-tricalcium phosphate (beta-TCP) in orthotopic implantation. Seven hundred milligrams of beta-TCP mixed with 1 x 10(6) UCB-MSCs diluted with 0.5 ml of saline (group CM) and mixed with the same volume of saline as control (group C) were implanted into a 1.5 cm diaphyseal defect and wrapped with PLGC membrane in the radius of Beagle dogs. Radiographs of the antebrachium were made after surgery. The implants were harvested 12 weeks after implantation and specimens were stained with H&E, toluidine blue and Villanueva-Goldner stains for histological examination and histomorphometric analysis of new bone formation. Additionally, UCB-MSCs were applied to a dog with non-union fracture. Radiographically, continuity between implant and host bone was evident at only one of six interfaces in group C by 12 weeks, but in three of six interfaces in group CM. Radiolucency was found only near the bone end in group C at 12 weeks after implantation, but in the entire graft in group CM. Histologically, bone formation was observed around beta-TCP in longitudinal sections of implant in both groups. Histomorphometric analysis revealed significantly increased new bone formation in group CM at 12 weeks after implantation (p < 0.05). When applied to the non-union fracture, fracture healing was identified by 6 weeks after injection of UCB-MSCs. The present study indicates that a mixture of UCB-MSCs and beta-TCP is a promising osteogenic material for repairing bone defects.
