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http://dx.doi.org/10.6116/kjh.2019.34.1.51.

Anti-inflammatory Effect of Nypa fruticans Wurmb. on tumor necrosis factor (TNF)-α-induced Inflammatory response in HaCaT cells  

Bae, Gi-Sang (Department of Herbology, College of Oriental Medicine, Wonkwang University)
Park, Sung-Joo (Department of Herbology, College of Oriental Medicine, Wonkwang University)
Publication Information
The Korea Journal of Herbology / v.34, no.1, 2019 , pp. 51-57 More about this Journal
Abstract
Objectives : Nypa fruticans Wurmb. (NF) have been used as a traditional medicine to treat inflammatory diseases in East-South Asia. However, it is largely undiscovered whether NF water extract could exhibit anti-inflammatory activities against tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$)-induced inflammatory responses on human keratinocytes, HaCaT cells. Therefore, this study was aimed to investigate the anti-inflammatory activity of NF water extract on TNF-${\alpha}$-induced inflammatory responses in HaCaT cells. Methods : To investigate the anti-inflammatory activites of NF water extract in HaCaT cells, the inflammatory model of HaCaT cells was established under a suitable concentration (10 ng/ml) of human TNF-${\alpha}$ (hTNF-${\alpha}$). HaCaT keratinocyte cells were pre-treated with NF water extract for 1 h, and then stimulated with hTNF-${\alpha}$. Then, the cells were harvested to measure the inflammatory mediators such as inducible nitric oxide synthase (iNOS), cyclooxygenase (COX)-2 and prostaglandin $E_2$ ($PGE_2$), and pro-inflammatory cytokine including TNF-${\alpha}$ and interleukin (IL)-6. In addition, we examined the inhibitory mechanisms of NF, mitogen activated protein kinases (MAPKs) and inhibitory kappa B alpha ($I{\kappa}-B{\alpha}$) Results : The treatment of NF inhibited the hTNF-${\alpha}$-induced elevation of iNOS, COX-2, and $PGE_2$ in HaCaT cells. In addition, NF treatment inhibited the hTNF-${\alpha}$-induced elevation of TNF-${\alpha}$ and IL-6. Furthermore, NF treatment inhibited the activation of MAPKs but not degradation of $I{\kappa}-B{\alpha}$. Conclusions : Taken together, our result suggest that treatment of NF could inhibit the hTNF-${\alpha}$-induced inflammatory responses via deactivation of MAPKs in HaCaT cells. This study could suggest that NF could be a beneficial agent to prevent skin damage or inflammation.
Keywords
Human keratinocytes; Inflammatory mediators; Nypa fruticans Wurmb. (NF); Tumor necrosis factor-${\alpha}$;
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