The Polyphenol Chlorogenic Acid Attenuates UVB-mediated Oxidative Stress in Human HaCaT Keratinocytes.

The Polyphenol Chlorogenic Acid Attenuates UVB-mediated Oxidative Stress in Human HaCaT Keratinocytes.
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DOI:
10.4062/biomolther.2014.006
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发表时间:
2014-02
影响因子:
3.7
通讯作者:
Hyun JW
Hyun JW
中科院分区:
医学3区
文献类型:
--
作者:
Cha JW;Piao MJ;Kim KC;Yao CW;Zheng J;Kim SM;Hyun CL;Ahn YS;Hyun JW

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研究了多酚化合物绿原酸(CGA)对中波紫外线(UVB)诱导的人HaCaT细胞氧化损伤的保护作用。在无细胞体系中,CGA可清除过氧化氢和中波紫外线(UVB)产生的1,1-二苯基-2-苦基肼自由基、超氧阴离子、羟基自由基和胞内活性氧(ROS)。此外,CGA还吸收了UVB波段(280-320 nm)的电磁辐射。正如彗星试验所证明的那样,UVB照射会导致细胞DNA损伤;在UVB照射之前用CGA对细胞进行预处理可以防止DNA损伤并提高细胞活力。此外,CGA预处理可预防或改善UVB暴露的细胞中与凋亡相关的变化,包括凋亡小体的形成、线粒体膜电位的破坏以及凋亡相关蛋白Bcl2、Bax和Caspase-3水平的变化。我们的发现表明,CGA可以保护细胞免受UVB辐射诱导的氧化应激。
We investigated the protective effects of chlorogenic acid (CGA), a polyphenol compound, on oxidative damage induced by UVB exposure on human HaCaT cells. In a cell-free system, CGA scavenged 1,1-diphenyl-2-picrylhydrazyl radicals, superoxide anions, hydroxyl radicals, and intracellular reactive oxygen species (ROS) generated by hydrogen peroxide and ultraviolet B (UVB). Furthermore, CGA absorbed electromagnetic radiation in the UVB range (280–320 nm). UVB exposure resulted in damage to cellular DNA, as demonstrated in a comet assay; pre-treatment of cells with CGA prior to UVB irradiation prevented DNA damage and increased cell viability. Furthermore, CGA pre-treatment prevented or ameliorated apoptosis-related changes in UVB-exposed cells, including the formation of apoptotic bodies, disruption of mitochondrial membrane potential, and alterations in the levels of the apoptosis-related proteins Bcl-2, Bax, and caspase-3. Our findings suggest that CGA protects cells from oxidative stress induced by UVB radiation.
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