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Lasers in Medical Science

, Volume 31, Issue 4, pp 673–678 | Cite as

S100a8/NF-κB signal pathway is involved in the 800-nm diode laser-induced skin collagen remodeling

  • Xiaolin Ren
  • Minggai Ge
  • Xiaofeng Qin
  • Peng Xu
  • Pingya Zhu
  • Yongyan Dang
  • Jun Gu
  • Xiyun Ye
Original Article

Abstract

The 800-nm diode laser is widely used for hair removal and also promotes collagen synthesis, but the molecular mechanism by which dermis responses to the thermal damage induced by the 800-nm diode laser is still unclear. Ten 2-month-old mice were irradiated with the 800-nm diode laser at 20, 40, and 60 J/cm2, respectively. Skin samples were taken for PCR, Western blot analysis, and histological study at day 3 or 30 after laser irradiation. The expression of S100a8 and its two receptors (advanced glycosylation end product-specific receptor, RAGE and toll-like receptor 4, TRL4) was upregulated at day 3 after laser treatments. P-p65 levels were also elevated, causing the increase of cytokine (tumor necrosis factor, TNF-α and interleukin 6, IL-6) and MMPs (MMP1a, MMP9). At day 30, PCR and Western blot analysis showed significant increase of type I and III procollagen in the dermis treated with laser. Importantly, skin structure was markedly improved in the laser-irradiated skin compared with the control. Thus, it seemed that S100a8 upregulation triggered NF-κB signal pathway through RAGE and TLR4, responding to laser-induced dermis wound healing. The involvement of the NF-κB pathway in MMP gene transcription promoted the turnover of collagen in the skin, accelerating new collagen synthesis.

Keywords

800-nm diode laser S100a8 NF-κB Skin collagen remodeling 

Notes

Acknowledgments

This work was supported by the National Natural Science Foundation of China (No. 81271742).

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Copyright information

© Springer-Verlag London 2016

Authors and Affiliations

  1. 1.Institute of Biomedical Sciences, School of Life SciencesEast China Normal UniversityShanghaiChina
  2. 2.Department of Dermatology, Changhai HospitalSecond Military Medical UniversityShanghaiChina

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