探讨了CeO2纳米颗粒对体外培养的人肺腺癌细胞A549的生物效应.使用扫描电子显微镜(SEM)对CeO2纳米颗粒进行了表征,采用噻唑蓝比色法测定了不同质量浓度CeO2纳米颗粒悬液对A549细胞活性的影响,对其抗氧化能力进行了检测,并且测定了30 nm CeO2作用24 h后细胞中的超氧化物歧化酶(SOD)和谷胱甘肽(GSH)的含量.结果表明,纳米CeO2能够增加A549细胞的活性,缓解H2O2造成的氧化应激损伤,引起细胞内SOD和GSH含量下降.说明:CeO2纳米颗粒有清除氧自由基能力,对A549细胞具有潜在的保护作用.
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