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用国产青石棉染毒BALB/c-3T3细胞72h后继续培养5wk,观察其恶性转化.试验结果表明,从1.0μg·cm-2剂量组开始转化率比阴性对照组增高(P<0.05),且有剂量反应关系.将各剂量组转化灶的细胞分别作软琼脂生长试验,结果均有细胞增殖成克隆;将20μg·cm-2剂量组-转化灶的细胞分别接种至裸鼠皮下,wk4即形成接种部位包块,所有包块经病理组织学检查证实为纤维肉瘤.本研究首次证明青石棉可诱发BALB/c-3T3细胞恶性转化.
BALB / c-3T3 cells were infected with crocidolite for 72 hours and then cultured for 5 weeks. Malignant transformation was observed. The results showed that the conversion rate from the 1.0μg · cm-2 dose group was higher than that of the negative control group (P <0.05), and there was a dose-response relationship. The cells in each dose group were subjected to soft agar growth test. As a result, all the cells proliferated into clones. Cells in the dose of 20 μg · cm-2-foci were inoculated subcutaneously into nude mice respectively, , All mass confirmed by histopathology fibrosarcoma. This study shows for the first time that crocidolite can induce the malignant transformation of BALB / c-3T3 cells.