Objective: To explore the therapeutic ef- fect of osteogenically induced adipose-derived stem cells (ADSCs) on vascular deprivation-induced osteonecrosis of the femoral head (ONFH) in rabbit model. Methods: Vas...Objective: To explore the therapeutic ef- fect of osteogenically induced adipose-derived stem cells (ADSCs) on vascular deprivation-induced osteonecrosis of the femoral head (ONFH) in rabbit model. Methods: Vascular deprivation-induced ONFH was established by intramuscular injection of methylpre- dnisolone, and vascular occlusion of the capital femoral epiphysis by electrocoagulation in adult New Zealand white rabbits. Eight weeks afLer the establishment of vascular dep- rivation-induced ONFH, animals were randomly divided into three equal groups. In Group A (control), no therapy was given. In Group B, core decompression was performed by drilling a hole (1.2 mm in diameter) from the outer cortex 2.5 cm distal to the proximal end of the greater trochanter. In Group C, 1 x 107 osteogenically induced ADSCs were resus- pended in 0.5 ml PBS, and then injected directly into the femoral head. Femoral head specimens were obtained at postoperative 8 weeks. The bone formation and three-di- mensional microstructure of the femoral head was evaluated by micro-computed tomography scans (u-CT). Immunohistochemical analysis was performed to detect the expression ofosteocalcin. Angiogenesis and repair of the femoral head were observed histologically. Results: In trabecular bone at the proximal femur region, the trabecular volume was higher in Group C (130.70 mm3± 4.33 mm3) than that in Groups A (101.07 mm3±7.76 mm3) and B (107.89 mm3±8.6g mm3, P〈0.01). Bone volume was significantly increased in Group C (40.09 mm3±6.35 mm3) than in Groups A (29.65 mm3±4.61 mm3) and B (31.80 mm3± 4.01 mm3, P〈0.01). The trabecular number was higher in Groups C (1.58±0.25) than other two groups (1.15±0.18, 1.16± 0.21, P〈0.01). Bone mineral density showed statistically significant difference between Groups C and A or B (375.38± 23.06) mg HA/ccm, vs (313.73 ± 19.30) mg HA/ccm and (316.09± 16.45) mg HA/ccm, P〈0.01). Histological examination indicated that there was more new bone formation in Group C than in other groups. Conclusion: Treatment with autologous osteogenically induced ADSCs transplantation results in an enhanced osteogenesis and microstructure of the vascular deprivation-induced osteonecrosis in rabbits.展开更多
基金This work is supported by a grant from the National Natural Science Foundation of China (30960390) and Doctoral Innovation Fund of Xinjiang Medical University (DC2010-12).
文摘Objective: To explore the therapeutic ef- fect of osteogenically induced adipose-derived stem cells (ADSCs) on vascular deprivation-induced osteonecrosis of the femoral head (ONFH) in rabbit model. Methods: Vascular deprivation-induced ONFH was established by intramuscular injection of methylpre- dnisolone, and vascular occlusion of the capital femoral epiphysis by electrocoagulation in adult New Zealand white rabbits. Eight weeks afLer the establishment of vascular dep- rivation-induced ONFH, animals were randomly divided into three equal groups. In Group A (control), no therapy was given. In Group B, core decompression was performed by drilling a hole (1.2 mm in diameter) from the outer cortex 2.5 cm distal to the proximal end of the greater trochanter. In Group C, 1 x 107 osteogenically induced ADSCs were resus- pended in 0.5 ml PBS, and then injected directly into the femoral head. Femoral head specimens were obtained at postoperative 8 weeks. The bone formation and three-di- mensional microstructure of the femoral head was evaluated by micro-computed tomography scans (u-CT). Immunohistochemical analysis was performed to detect the expression ofosteocalcin. Angiogenesis and repair of the femoral head were observed histologically. Results: In trabecular bone at the proximal femur region, the trabecular volume was higher in Group C (130.70 mm3± 4.33 mm3) than that in Groups A (101.07 mm3±7.76 mm3) and B (107.89 mm3±8.6g mm3, P〈0.01). Bone volume was significantly increased in Group C (40.09 mm3±6.35 mm3) than in Groups A (29.65 mm3±4.61 mm3) and B (31.80 mm3± 4.01 mm3, P〈0.01). The trabecular number was higher in Groups C (1.58±0.25) than other two groups (1.15±0.18, 1.16± 0.21, P〈0.01). Bone mineral density showed statistically significant difference between Groups C and A or B (375.38± 23.06) mg HA/ccm, vs (313.73 ± 19.30) mg HA/ccm and (316.09± 16.45) mg HA/ccm, P〈0.01). Histological examination indicated that there was more new bone formation in Group C than in other groups. Conclusion: Treatment with autologous osteogenically induced ADSCs transplantation results in an enhanced osteogenesis and microstructure of the vascular deprivation-induced osteonecrosis in rabbits.