Open Access

Protective effect of curcumin against ultraviolet A irradiation‑induced photoaging in human dermal fibroblasts

  • Authors:
    • Xiaoming Liu
    • Ruizhi Zhang
    • Haixia Shi
    • Xiaobo Li
    • Yanhong Li
    • Ahmad Taha
    • Chunxing Xu
  • View Affiliations

  • Published online on: March 20, 2018     https://doi.org/10.3892/mmr.2018.8791
  • Pages: 7227-7237
  • Copyright: © Liu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Ultraviolet (UV) radiation induces DNA damage, oxidative stress, and inflammatory processes in skin, resulting in photoaging. Natural botanicals have gained considerable attention due to their beneficial protection against the harmful effects of UV irradiation. The present study aimed to evaluate the ability of curcumin (Cur) to protect human dermal fibroblasts (HDFs) against ultraviolet A (UVA)‑induced photoaging. HDFs were treated with 0‑10 µM Cur for 2 h and subsequently exposed to various intensities of UVA irradiation. The cell viability and apoptotic rate of HDFs were investigated by MTT and flow cytometry assays, respectively. The effect of UVA and Cur on the formation of reactive oxygen species (ROS), malondialdehyde levels, which are an indicator of ROS, and the levels/activity of antioxidative defense proteins, including glutathione, superoxide dismutase and catalase, were evaluated using 2',7'-dichlorofluorescin diacetate and commercial assay kits. Furthermore, western blotting was performed to determine the levels of proteins associated with endoplasmic reticulum (ER) stress, the apoptotic pathway, inflammation and the collagen synthesis pathway. The results demonstrated that Cur reduced the accumulation of ROS and restored the activity of antioxidant defense enzymes, indicating that Cur minimized the damage induced by UVA irradiation in HDFs. Furthermore, western blot analysis demonstrated that Cur may attenuate UVA‑induced ER stress, inflammation and apoptotic signaling by downregulating the protein expression of glucose‑regulated protein 78, C/EBP‑homologous protein, nuclear factor‑κB and cleaved caspase‑3, while upregulating the expression of Bcl‑2. Additionally, it was demonstrated that Cur may regulate collagen metabolism by decreasing the protein expression of matrix metalloproteinase (MMP)‑1 and MMP‑3, and may promote the repair of cells damaged as a result of UVA irradiation through increasing the protein expression of transforming growth factor‑β (TGF‑β) and Smad2/3, and decreasing the expression of the TGF‑β inhibitor, Smad7. In conclusion, the results of the present study indicate the potential benefits of Cur for the protection of HDFs against UVA‑induced photoaging and highlight the potential for the application of Cur in skin photoprotection.
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May-2018
Volume 17 Issue 5

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Copy and paste a formatted citation
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Spandidos Publications style
Liu X, Zhang R, Shi H, Li X, Li Y, Taha A and Xu C: Protective effect of curcumin against ultraviolet A irradiation‑induced photoaging in human dermal fibroblasts. Mol Med Rep 17: 7227-7237, 2018
APA
Liu, X., Zhang, R., Shi, H., Li, X., Li, Y., Taha, A., & Xu, C. (2018). Protective effect of curcumin against ultraviolet A irradiation‑induced photoaging in human dermal fibroblasts. Molecular Medicine Reports, 17, 7227-7237. https://doi.org/10.3892/mmr.2018.8791
MLA
Liu, X., Zhang, R., Shi, H., Li, X., Li, Y., Taha, A., Xu, C."Protective effect of curcumin against ultraviolet A irradiation‑induced photoaging in human dermal fibroblasts". Molecular Medicine Reports 17.5 (2018): 7227-7237.
Chicago
Liu, X., Zhang, R., Shi, H., Li, X., Li, Y., Taha, A., Xu, C."Protective effect of curcumin against ultraviolet A irradiation‑induced photoaging in human dermal fibroblasts". Molecular Medicine Reports 17, no. 5 (2018): 7227-7237. https://doi.org/10.3892/mmr.2018.8791