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首页> 外文期刊>Journal of dermatological science >Keratinocyte growth factor down-regulates intracellular ROS production induced by UVB.
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Keratinocyte growth factor down-regulates intracellular ROS production induced by UVB.

机译:角质形成细胞生长因子下调UVB诱导的细胞内ROS的产生。

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BACKGROUND: Exposure to ultraviolet (UV) radiation causes a complex cellular response, mostly mediated by the production of reactive oxygen species (ROS), which can be counteracted by exogenous treatments and endogenous mechanisms with anti-oxidant and scavenger properties. Keratinocyte growth factor (KGF/FGF7), a member of the fibroblast growth factor family, promotes epithelial growth and differentiation and is involved in cell survival after oxidant injuries. OBJECTIVE: We analyzed the role of KGF in the control of intracellular ROS production and oxidative stress after UVB exposure on KGF receptor (KGFR) transfected cells and human immortalized and primary keratinocytes. METHODS: We assessed the intracellular ROS production measuring the intensity of the oxidation-sensitive fluorescent probe 2',7'-dichlorofluorescein diacetate (DCFH-DA) by confocal microscopy, as well as the catalase activity by spectrophotometric assay. Moreover, morphological and biochemical analysis of actin cytoskeleton reorganization was evaluated as a further marker of oxidative damage. RESULTS: Our data show that KGF significantly reduces intracellular ROS generation in response to UVB, preserves the decrease of catalase activity and prevents actin cytoskeleton rearrangement. CONCLUSION: Our results provide a further evidence that KGF may be crucial for an efficient skin photoprotection, demonstrating a direct role for KGF in the reduction of intracellular ROS content following UVB exposure.
机译:背景:暴露于紫外线(UV)会引起复杂的细胞反应,主要是由活性氧(ROS)的产生介导的,这种反应可通过具有抗氧化剂和清除剂特性的外源性处理和内源性机制来抵消。角质形成细胞生长因子(KGF / FGF7)是成纤维细胞生长因子家族的成员,可促进上皮细胞的生长和分化,并参与氧化剂损伤后的细胞存活。目的:我们分析了KGF在UVB暴露于KGF受体(KGFR)转染的细胞以及人类永生和原代角质形成细胞后,在控制细胞内ROS产生和氧化应激中的作用。方法:我们通过共聚焦显微镜评估了氧化敏感荧光探针2',7'-二氯荧光素二乙酸盐(DCFH-DA)的强度,并通过分光光度法测定了过氧化氢酶的活性,从而评估了细胞内ROS的产生。此外,肌动蛋白细胞骨架重组的形态和生化分析被评估为氧化损伤的进一步标志。结果:我们的数据表明,KGF显着减少了对UVB的细胞内ROS生成,保留了过氧化氢酶活性的降低,并防止肌动蛋白的细胞骨架重排。结论:我们的结果提供了进一步的证据,表明KGF可能对有效的皮肤光保护至关重要,这表明KGF在UVB暴露后降低细胞内ROS含量方面具有直接作用。

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