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Beilstein J Nanotechnol:PEG-nGO诱导的体内氧化应激的全身作用

2019-06-10 不详 网络

氧化应激(OS)在某些人类疾病的病理学中起重要作用。科学家对纳米石墨烯复合材料(PEG-nGO)给药后氧化应激的测定产生了浓厚的兴趣。通过改良的Hummer方法合成氧化石墨烯片(GOS),并通过X射线衍射(XRD),紫外-可见光谱(UV)和透射电子显微镜(TEM)表征。采用张的方法来破解GOS。然后用聚乙二醇(PEG)使纳米氧化石墨烯聚乙二醇化。通过傅里叶变换红外光谱(FTIR),UV光谱和TEM

氧化应激(OS)在某些人类疾病的病理学中起重要作用。科学家对纳米石墨烯复合材料(PEG-nGO)给药后氧化应激的测定产生了浓厚的兴趣。

通过改良的Hummer方法合成氧化石墨烯片(GOS),并通过X射线衍射(XRD),紫外-可见光谱(UV)和透射电子显微镜(TEM)表征。采用张的方法来破解GOS。然后用聚乙二醇(PEG)使纳米氧化石墨烯聚乙二醇化。通过傅里叶变换红外光谱(FTIR),UV光谱和TEM证实nGO的PEG化。通过使用动态光散射(DLS)测定nGO和PEG-nGO的平均尺寸分布。随后,进行了测量氧化应激标记物的体内研究,即脂质过氧化物,以及抗氧化剂,包括过氧化氢酶,超氧化物歧化酶,谷胱甘肽和谷胱甘肽S-转移酶。在施用剂量(5mg/kg)的PEG-nGO后,在不同的时间间隔进行比较。

结果显示,自由基的增加和器官中自由基清除酶的减少。该结果表明,PEG-nGO处理在治疗的最初几个小时引起器官OS增加。然而,4小时后肝脏完全从OS恢复。即使在4小时后,脑,心脏和肾脏也显示OS增加。

总之,PEG-nGO诱导的OS增加可能对脑,心脏和肾脏有害。

原始出处:

Ain QT, Haq SH, et al., The systemic effect of PEG-nGO-induced oxidative stress in vivo in a rodent model. Beilstein J Nanotechnol. 2019 Apr 18;10:901-911. doi: 10.3762/bjnano.10.91. eCollection 2019.

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    2019-10-11 shock_melon
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    2020-01-22 feather89
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    2019-06-12 wleon8899
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