AIM: to observe the protective effect of Astragalus injection on N-methyl-N-nitrosourea (MNU) -induced photoreceptor apoptosis in SD rats.

目的观察黄芪注射液对N甲基N亚硝脲(MNU)诱导SD大鼠视网膜光感受器细胞凋亡的保护作用。

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Objective To study time and dose dependence of animal models with brain neoplasms induced transplacentally with N-ethyl-N-nitrosourea (NEU).

目的探讨亚硝基乙基脲（NEU）经胎盘诱发脑肿瘤动物模型的时间和剂量依赖性。

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