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首页> 外文期刊>Toxicology in vitro: an international journal published in association with BIBRA >The primary role of iron-mediated lipid peroxidation in the differential cytotoxicity caused by two varieties of talc nanoparticles on A549 cells and lipid peroxidation inhibitory effect exerted by ascorbic acid.
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The primary role of iron-mediated lipid peroxidation in the differential cytotoxicity caused by two varieties of talc nanoparticles on A549 cells and lipid peroxidation inhibitory effect exerted by ascorbic acid.

机译:铁介导的脂质过氧化作用在两种滑石纳米颗粒对A549细胞造成的不同细胞毒性中的主要作用以及抗坏血酸对脂质过氧化的抑制作用。

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摘要

Talc particles, the basic ingredient in different kinds of talc-based cosmetic and pharmaceutical products, pose a health risk to pulmonary and ovarian systems due to domestic and occupational exposures. Two types of talc nanoparticles depending on the source of geographical origin - indigenous- and commercial talc nanoparticles were assessed for their potential in vitro toxicity on A(549) cells; along with indigenous conventionally used microtalc particles. Cell viability, determined through live/dead staining and 3-(4,5-dimethyl thiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay, decreased as a function of concentration, origin and size of particles. Both varieties of talc nanoparticles differentially induced lipid peroxidation (LPO), which was correlated with the pattern of lactate dehydrogenase (LDH) leakage, reactive oxygen species (ROS) generation, and glutathione (GSH) depletion. Relatively higher cytotoxicity of indigenous nanotalc could be attributed to its higher content of iron as compared to commercial nanotalc. The known scavenger of ROS, l-ascorbic acid significantly inhibited LPO induction due to talc particles. Data suggest that nanotalc toxicity on A(549) cells was mediated through oxidative stress, wherein role of iron-mediated LPO was much pronounced in differential cytotoxicity.
机译:滑石粉颗粒是各种基于滑石粉的化妆品和药品中的基本成分,由于家庭和职业暴露,对肺和卵巢系统构成健康风险。根据地理来源,两种类型的滑石纳米颗粒-评估了本地和商业的滑石纳米颗粒对A(549)细胞的潜在体外毒性。以及本地常规使用的微滑石颗粒。通过活/死染色和3-(4,5-二甲基噻唑-2-基)-2,5-二苯基溴化四氮唑(MTT)测定法测定的细胞活力随颗粒浓度,来源和大小而降低。两种滑石纳米颗粒均差异诱导脂质过氧化(LPO),这与乳酸脱氢酶(LDH)泄漏,活性氧(ROS)生成和谷胱甘肽(GSH)消耗的模式有关。天然纳米滑石相对较高的细胞毒性可以归因于其铁含量比市售纳米滑石更高。由于滑石颗粒,已知的ROS清除剂1-抗坏血酸显着抑制了LPO的诱导。数据表明,纳米滑石对A(549)细胞的毒性是通过氧化应激介导的,其中铁介导的LPO在不同的细胞毒性中的作用非常明显。

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