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    • 8. 发明申请
    • SIZE-DEPENDENT BIOLOGICAL EFFECT OF NANOPARTICLES
    • 纳米粒子的大小依赖性生物学效应
    • WO2009002386A3
    • 2009-03-05
    • PCT/US2008006701
    • 2008-05-23
    • UNIV CALIFORNINACHEN FANQING FRANK
    • CHEN FANQING FRANK
    • A61K9/14
    • C12Q1/6809B82Y5/00
    • Nanoparticles are used increasingly in consumer products and biomedical applications. Yet the cellular interaction mechanism at the molecular level is not well understood for nanomaterials of different size, shape and surface chemistry. Gold nanoparticles (Au-NPs), which have been explored extensively for various applications in recent years, are used as the model system to help understand the size-dependent biological effects of nanoparticles. Jurkat cells treated with Au-NPs ranging from 2 nm to 200 nm were studied. Whole genome expression measurements indicate size-dependent effects, including linear scaling and threshold effects. In addition, a non-linear pattern of gene responses that persisted over time were observed in 20-40 nm Au-NP treated cells. Gene function, promoter, and pathway analyses reveal differential signaling processes that are correlated with nanoparticle sizes. The size may play a role in cellular sorting of naturally occurring particulates, particle interaction with the receptors, intracellular transportation, signaling and stress responses.
    • 纳米颗粒越来越多地用于消费品和生物医学应用。 然而,在分子水平上的细胞相互作用机制对于不同尺寸,形状和表面化学的纳米材料来说是不太了解的。 近年来已经广泛应用于各种应用的金纳米颗粒(Au-NP)被用作模型系统,以帮助了解纳米颗粒的尺寸依赖性生物学效应。 研究了用Au-NP处理的Jurkat细胞,范围为2nm至200nm。 全基因组表达测量显示尺寸依赖性影响,包括线性缩放和阈值效应。 此外,在20-40nm Au-NP处理的细胞中观察到随时间持续的基因应答的非线性模式。 基因功能,启动子和通路分析揭示与纳米颗粒尺寸相关的差异信号传导过程。 大小可能在天然存在的颗粒的细胞分选,与受体的颗粒相互作用,细胞内运输,信号传导和应激反应中起作用。