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首页> 外文期刊>Biomaterials >The scavenging of reactive oxygen species and the potential for cell protection by functionalized fullerene materials.
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The scavenging of reactive oxygen species and the potential for cell protection by functionalized fullerene materials.

机译:通过功能化的富勒烯材料清除活性氧和保护细胞的潜力。

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We demonstrated that three different types of water-soluble fullerenes materials can intercept all of the major physiologically relevant ROS. C(60)(C(COOH)(2))(2), C(60)(OH)(22), and Gd@C(82)(OH)(22) can protect cells against H(2)O(2)-induced oxidative damage, stabilize the mitochondrial membrane potential and reduce intracellular ROS production with the following relative potencies: Gd@C(82)(OH)(22)> or =C(60)(OH)(22)>C(60)(C(COOH)(2))(2). Consistent with their cytoprotective abilities, these derivatives can scavenge the stable 2,2-diphenyl-1-picryhydrazyl radical (DPPH), and the reactive oxygen species (ROS) superoxide radical anion (O(2)(*-)), singlet oxygen, and hydroxyl radical (HO(*)), and can also efficiently inhibit lipid peroxidation in vitro. The observed differences in free radical-scavenging capabilities support the hypothesis that both chemical properties, such as surface chemistry induced differences in electron affinity, and physical properties, such as degree of aggregation, influence the biological and biomedical activities of functionalized fullerenes. This represents the first report that different types of fullerene derivatives can scavenge all physiologically relevant ROS. The role of oxidative stress and damage in the etiology and progression of many diseases suggests that these fullerene derivatives may be valuable in vivo cytoprotective and therapeutic agents.
机译:我们证明了三种不同类型的水溶性富勒烯材料可以拦截所有主要的生理相关ROS。 C(60)(C(COOH)(2))(2),C(60)(OH)(22)和Gd @ C(82)(OH)(22)可以保护细胞免受H(2)O (2)诱导氧化损伤,稳定线粒体膜电位并降低细胞内ROS的产生,其相对效能如下:Gd @ C(82)(OH)(22)>或= C(60)(OH)(22)> C(60)(C(COOH)(2))(2)。与它们的细胞保护能力一致,这些衍生物可以清除稳定的2,2-二苯基-1-吡啶并肼基(DPPH)和活性氧(ROS)超氧自由基阴离子(O(2)(*-)),单线态氧和羟基自由基(HO(*)),并且还可以在体外有效抑制脂质过氧化。观察到的清除自由基能力的差异支持以下假设:化学性质(例如表面化学)导致电子亲和力的差异,以及物理性质(例如聚集程度)均影响功能化富勒烯的生物和生物医学活性。这代表了第一个报告,即不同类型的富勒烯衍生物可以清除所有生理相关的ROS。氧化应激和损伤在许多疾病的病因和进展中的作用表明,这些富勒烯衍生物可能是有价值的体内细胞保护和治疗剂。

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