摘要:
Aim To establish human U87-MG glioma model in nude mice brain and to observe the characteristics of the tumor growth. Methods Human U87-MG glioma cells were cultured in vitro. 5 μL of cell suspension containing 3.0 ×1010·L-1, 4.0×1010·L-1and 5.0×1010·L-1respectively was inocula-ted into the right caudate nucleus of 18 male nude mice brain un-der the guidance of stereotaxic apparatus, separately, whereas another 6 nude mice as the control group, were inoculated into the same volume of Hanks solution. The moving and survival state of rats with gliomas were observed. The examinations of the tumors formation, volumes, metastasis and histopathology were performed and the obtained brain samples were stained with HE and immunohistochemistry. Results All the tested rats of dif-ferent inoculation doses developed brain tumors without extracra-nial metastasis. The mean survival time of three groups was (46.50 ± 3.27) d,(38.50 ± 3.28) d and (30.67 ± 3.51) d,respectively. The tumors showed the similar morphological fea-tures and immunophenotype to human glioma. There was positive expression of GFAP and S-100 in the tumors. Conclusions The orthotopic implantation model of human U87-MG glioma, by in-oculating quantitative U87-MG cells stereotaxically into the brains of the nude mice, is successfully established with 100 yield of intracranial tumor and no extracranial growth extension. It resembles the histopathological and morphological features of human glioma,which can be used as a reliable animal model for the study of the tumorigenesis, pathogenesis, biological charac-teristics and therapy of glioma.%目的 应用不同数量U87-MG细胞接种裸鼠脑内,建立裸鼠脑胶质瘤模型,观察其生长特性.方法 采用立体定向技术,分别将3.0×1010·L-1、4.0×1010·L-1、5.0×1010 ·L-1浓度的人脑胶质瘤细胞U87-MG单细胞悬液,接种于18只♂裸鼠的右侧尾状核区,每只接种体积为5 μL,另取6只裸鼠作为对照,接种同体积Hanks液.观察不同接种量实验鼠的生存状态、成瘤情况及脏器转移灶、带瘤生存期,测量肿瘤的最大径,计算肿瘤体积,将获取的全脑标本制作病理切片,行HE染色和免疫组化检查.结果 各接种量的实验组成瘤率均为100%,未见颅外转移病灶,3组裸鼠的平均生存时间分别为(46.50 ± 3.27) d、(38.50 ± 3.28) d、(30.67 ± 3.51) d;病理学检查符合人脑胶质瘤细胞的形态学特征和免疫表型;免疫组化GFAP和S-100蛋白呈阳性表达.结论 立体定向脑内定量注射U87-MG细胞制备的人脑胶质瘤裸鼠原位移植模型成瘤率高、颅内生长稳定、颅外远隔部位转移率低,与人脑胶质瘤病理学及形态学特征相似,能为研究胶质瘤的发生、发病机制、生物学特性以及探寻有效的治疗措施提供可靠的动物模型.