MG-63骨肉瘤原位模型的建立

Establishment of Orthotopic Model of MG-63 Osteosarcoma

目的建立裸鼠股骨骨肉瘤原位模型。方法体内连续传代筛选MG-63细胞系获得高成瘤率的细胞,MG-63细胞悬液或MG-63细胞皮下成瘤瘤组织块接种于裸鼠股骨下端。观察MG-63细胞在股骨骨肉瘤原位模型的成瘤特性,并比较两种成瘤方法的成瘤率,常规影像学检查以及肿瘤组织病理检查。结果两周内可见局部肿瘤形成。术后4周X线片可见股骨下段溶骨及成骨改变、肿瘤样骨形成。光镜下可见典型的骨肉瘤病理特征,成骨作用明显。细胞悬液法成瘤率70%,组织块法成瘤率100%,两种方法成瘤率的差异有统计学意义(P<0.05)。结论成功建立了裸鼠股骨下段原位肿瘤移植模型,为骨肉瘤的研究提供了更接近人体内环境的研究基础。

Objective To establish an orthotopic transplantation model of human osteosarcoma in nude mice. Methods The cell suspensions of serial passage of MG-63 cell line with high tumor formation rate were implanted into the distal femur of nude mice. The tumor tissue were treated with routine pathologic HE stain and observed under microscope, and made to the x-ray inspection. Results In two weeks, the neoplasm was found to grow at local tissue of nude mice, and also found in x-ray film when it was after implant operated for 4 weeks. The typical characteristics of osteosarcoma of tumor tissue were found under microscope. The tumor formation rate of tumor tissue transplantation was 100% and the tumor formation rate of MG-63 cell suspension was 70%. Conclusion The orthotopic transplantation model of osteosarcoma in nude mice is well established and provides a more similar human internal milieu for researches of osteosarcoma.