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Int. J. Mol. Sci. 2014, 15(5), 7563-7578; doi:10.3390/ijms15057563
Article

Topical N-Acetylcysteine Accelerates Wound Healing in Vitro and in Vivo via the PKC/Stat3 Pathway

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Received: 21 January 2014 / Revised: 17 April 2014 / Accepted: 21 April 2014 / Published: 2 May 2014
(This article belongs to the Section Biochemistry, Molecular Biology and Biophysics)
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Abstract

N-Acetylcysteine (Nac) is an antioxidant administered in both oral and injectable forms. In this study, we used Nac topically to treat burn wounds in vitro and in vivo to investigate mechanisms of action. In vitro, we monitored glutathione levels, cell proliferation, migration, scratch-wound healing activities and the epithelialization-related proteins, matrixmetalloproteinase-1 (MMP-1) and proteins involved in regulating the expression of MMP-1 in CCD-966SK cells treated with Nac. Various Nac concentrations (0.1, 0.5, and 1.0 mM) increased glutathione levels, cell viability, scratch-wound healing activities and migration abilities of CCD-966SK cells in a dose-dependent manner. The MMP-1 expression of CCD-966SK cells treated with 1.0 mM Nac for 24 h was significantly increased. Levels of phosphatidylinositol 3-kinase (PI3K), protein kinase C (PKC), janus kinase 1 (Jak1), signal transducer and activator of transcription 3 (Stat3), c-Fos and Jun, but not extracellular signal-regulated protein kinases 1 and 2 (Erk1/2), were also significantly increased in a dose-dependent manner compared to the controls. In addition, Nac induced collagenous expression of MMP-1 via the PKC/Stat3 signaling pathway. In vivo, a burn wound healing rat model was applied to assess the stimulation activity and histopathological effects of Nac, with 3.0% Nac-treated wounds being found to show better characteristics on re-epithelialization. Our results demonstrated that Nac can potentially promote wound healing activity, and may be a promising drug to accelerate burn wound healing.
Keywords: N-acetylcysteine; wound healing; glutathione; MMP-1; PKC; Stat3 N-acetylcysteine; wound healing; glutathione; MMP-1; PKC; Stat3
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Tsai, M.-L.; Huang, H.-P.; Hsu, J.-D.; Lai, Y.-R.; Hsiao, Y.-P.; Lu, F.-J.; Chang, H.-R. Topical N-Acetylcysteine Accelerates Wound Healing in Vitro and in Vivo via the PKC/Stat3 Pathway. Int. J. Mol. Sci. 2014, 15, 7563-7578.

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