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Oncotarget：青蒿琥酯改性的纳米氧化石墨烯可用于癌症的化疗-光热治疗

2017-12-13 MedSci MedSci原创

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青蒿琥酯（ARS）的水溶性差，限制了其临床应用。本研究中，研究人员将ARS与PEG化纳米氧化石墨烯（nGO-PEG）共价连接，获得了ARS修饰的nGO-PEG（nGO-PEG-ARS），在生理环境中具有优异的光热效应和分散性。nGO-PEG-ARS可诱导活性氧（ROS）和过氧亚硝酸盐（ONOO-）的产生。虽然近红外（NIR）辐照nGO-PEG并不会诱导产生细胞毒性，但是NIR照射下nGO-PEG的

青蒿琥酯（ARS）的水溶性差，限制了其临床应用。本研究中，研究人员将ARS与PEG化纳米氧化石墨烯（nGO-PEG）共价连接，获得了ARS修饰的nGO-PEG（nGO-PEG-ARS），在生理环境中具有优异的光热效应和分散性。nGO-PEG-ARS可诱导活性氧（ROS）和过氧亚硝酸盐（ONOO-）的产生。

虽然近红外（NIR）辐照nGO-PEG并不会诱导产生细胞毒性，但是NIR照射下nGO-PEG的光热效应不仅增强了细胞摄取，还增强了nGO-PEG-ARS对ONOO─的产生，导致了nGO-PEG-ARS对杀伤HepG2细胞的协同化学光热效应。使用Fe（III）5,10,15,20-四（4-磺酸基苯基）卟啉氯化物（FeTTPS，ONOO-清除剂）代替抗氧化剂N-乙酰半胱氨酸（NAC，ROS清除剂）预处理可明显阻断nGO-PEG-ARS的细胞毒性，无论有或没有NIR照射，表明ONOO-代替ROS主导了nGO-PEG-ARS的协同化学-光热抗癌作用。与其他处理组相比，使用NIR照射的nGO-PEG-ARS 15天内得到完全的肿瘤治愈，并且在用或不用NIR照射的nGO-PEG-ARS处理小鼠30天，并没有诱导明显的组织损伤，进一步证明了nGO-PEG-ARS具有协同的化学-光热抗癌作用。

综上所述，该研究结果表明，nGO-PEG-ARS是一个多模式协同癌症治疗的多功能纳米平台。

原始出处：

Pang Y, Mai Z, et al., Artesunate-modified nano-graphene oxide for chemo-photothermal cancer therapy. Oncotarget. 2017 Sep 23;8(55):93800-93812. doi: 10.18632/oncotarget.21191. eCollection 2017 Nov 7.

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    2018-07-05 仁医06

    #target#

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    2018-02-21 ms7899726347904398

    #化石#

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    2018-06-14 yangjxjc

    #石墨烯#

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