胚胎干细胞裸鼠眼内诱导形成髓上皮瘤

Development of embryonic stem cells into medulloepithelioma in the eyes of nude mice

目的 :观察小鼠胚胎干细胞在裸鼠眼内生长的形态变化。方法 :将胚胎干细胞在体外培养 ,并维持在未分化的状态 ,再移植到Balb/c裸小鼠眼内。 6 - 45d处死裸鼠 ,形态学和免疫组化观察其变化。结果 :胚胎干细胞移植到裸小鼠右眼后 ,在眼前房和玻璃体腔内生长。形态学检查在前房和玻璃体腔内见到各种形态的细胞 ,出现囊样、腺样、管样、菊花样等结构。免疫组化NSE染色多数细胞呈强阳性反应 ,部分细胞GFAP也呈中强度阳性反应。结论

AIM: To investigate the intraocular growth characteristics of mice embryonic stem (ES) cells in nude mice.METHODS: Murine embryonic stem cells (D3 cell lines) were cultured and maintained in an undifferentiated state in vitro, then transplanted into the eyes of nude mice. In 6-45 d, the nude mice were executed for Morphological and immunohistochemical examinations.RESULTS: ES cells were developed into masses which enlarged gradually in the anterior chamber and vitreous cavity. Morphological examination showed different component: cysts, sheets and cords of medullary epithelium and rosettes in the eyes of the nude mice. Most of cells were highly stained by NSE, and some cells were moderately stained by GFAP.CONCLUSION: The embryonic stem cells(D3 cell lines) could differentiated into medulloepithelioma-like tissue in the anterior chamber and vitreous cavity of the Balb/c nude mice.