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Abstract Title:

Total glucosides of paeony (TGP) inhibits the production of inflammatory cytokines in oral lichen planus by suppressing the NF-κB signaling pathway.

Abstract Source:

Int Immunopharmacol. 2016 Jul ;36:67-72. Epub 2016 Apr 22. PMID: 27107800

Abstract Author(s):

Yanni Wang, Han Zhang, Guanhuan Du, Yufeng Wang, Tianyi Cao, Qingqiong Luo, Junjun Chen, Fuxiang Chen, Guoyao Tang

Article Affiliation:

Yanni Wang

Abstract:

Total glucosides of paeony (TGP) is a bioactive compound extracted from paeony roots and has been widely used to ameliorate inflammation in several autoimmune and inflammatory diseases. However, the anti-inflammatory effect of TGP on oral lichen planus (OLP), a chronic inflammatory oral condition characterized by T-cell infiltration and abnormal epithelial keratinization cycle remains unclear. In this study, we found that TLR4 was highly expressed and activation of the NF-κB signaling pathway was obviously observed in the OLP tissues. Moreover, there was significant higher mRNA expression of inflammatory cytokines interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) in OLP keratinocytes than normal oral epithelial keratinocytes. With the help of the cell culture model by stimulating the keratinocyte HaCaT cells with lipopolysaccharides (LPS), we mimicked the local inflammatory environment of OLP. And we further confirmed that TGP could inhibit LPS-induced production of IL-6 and TNF-α in HaCaT cells via a dose-dependent manner. TGP treatment decreased the phosphorylation of IκBα and NF-κB p65 proteins, thus leading to less nuclear translocation of NF-κB p65 in HaCaT cells. Therefore, our data suggested that TGP may be a new potential candidate for the therapy of OLP.

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