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纳米锰锌铁氧体对肝细胞L-02的细胞毒性 被引量:1

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摘要 目的研究纳米锰锌铁氧体对正常人肝细胞株(L-02)的体外毒性。方法使用透射电镜(TEM)以及X射线衍射仪(XRD)对纳米锰锌铁氧体进行表征,采用噻唑蓝实验(MTT比色法)检测M0.5Zn0.5Fe2O4纳米材料不同浓度(6.25、25、50、100、200、400和800μg/ml)以及不同染毒时间24、48和72 h对L-02细胞活性的影响,观察染毒48 h后细胞形态的改变并检测细胞上清液中乳酸脱氢酶(LDH)漏出率。结果纳米Mn0.5Zn0.5Fe2O4为粒径大约15 nm左右的圆形或椭圆形尖晶石型锰锌铁氧体。L-02细胞的生长活性随着Mn0.5 Zn0.5 Fe2O4浓度的升高和染毒时间的延长而下降。各剂量组细胞活力在染毒48 h后趋于平稳,当纳米颗粒浓度达到200μg/ml时,细胞的存活率明显低于对照组(P<0.01)。与对照组相比,当浓度达到100μg/ml时,染毒48 h的L-02细胞形态发生改变,培养液上清中LDH活性明显升高(P<0.05)。结论随着浓度的增加和时间的延长纳米锰锌铁氧体对L-02细胞毒性增加,破坏细胞膜完整性可能是锰锌铁氧体纳米颗粒造成细胞损伤的途径之一。
出处 《毒理学杂志》 CAS CSCD 北大核心 2011年第2期111-114,共4页 Journal of Toxicology
基金 科技部863项目(2007AA03Z356)
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