Abstract

目的 比较温石棉、难溶性陶瓷纤维(RCF)、玻璃棉(GW)、岩棉(RW)对人支气管上皮细胞BEAS-2B细胞株的细胞毒性与致恶性转化的能力.方法 检测温石棉、RCF、GW、RW对BEAS-2B的细胞毒性;BEAS-2B细胞每10 d染毒24 h,共染毒6次,待细胞出现生长抑制后,用锚着不依赖性生长实验判断细胞恶性转化.结果 温石棉、RCF、GW、RW均对BEAS-2B细胞具有细胞毒性,并呈剂量一反应关系.染毒6次后,温石棉组、RCF组细胞生长速度加快,排列紊乱,失去接触抑制,出现复叠层生长,并可在软琼脂上生长,细胞集落形成率分别为4.6%和7.2%,与阴性对照组比较,差异有统计学意义(P 0.05).结论 温石棉组、RCF具有使BEAS-2B细胞发生恶性转化的能力,GW、RW染毒60 d未能使BEAS-2B细胞发生恶性转化。

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