# Evaluation of the Antiaging Potential of the Dendropanax morbiferus-Derived Compound Dendropanoxide in TNF-α-Stimulated Human Dermal Fibroblasts

## TL;DR

This study shows that dendropanoxide, a compound from Dendropanax morbiferus, reduces skin aging by lowering oxidative stress and inflammation while boosting collagen and skin barrier protection.

## Contribution

The study demonstrates the antiaging potential of dendropanoxide through multiple cellular mechanisms in human skin cells.

## Key findings

- Dendropanoxide significantly reduced ROS production and MMP-1 expression in skin cells.
- The compound increased pro-collagen I secretion and inhibited inflammatory cytokines like IL-1β and IL-6.
- Dendropanoxide enhanced gene expression of skin barrier proteins and inhibited JNK/p38 signaling pathways.

## Abstract

In this study, we investigated the antiaging potential of dendropanoxide (DP), an active compound derived from Dendropanax morbiferus, in human dermal fibroblasts (NHDFs) induced by Tumor Necrosis Factor-alpha (TNF-α) and in human epidermal keratinocytes (NHEKs) induced by TNF-α and interferon gamma (IFN-γ). We induced oxidative stress related to ultraviolet (UV) radiation with TNF-α and IFN-γ and then treated the cells with various concentrations of DP to evaluate its effects on reactive oxygen species (ROS) production, matrix metalloproteinase-1 (MMP-1) expression, collagen synthesis, inflammatory cytokine expression, and skin barrier protection. The results showed that DP significantly reduced ROS production, indicating its potential to alleviate oxidative stress in the skin. Additionally, DP effectively inhibited MMP-1 production, suggesting that it could prevent collagen degradation in the dermis, significantly increase the secretion of pro-collagen I, promote collagen synthesis, and protect the dermal extracellular matrix (ECM). Moreover, DP significantly reduced the expression of inflammatory cytokines IL-1β and IL-6, thereby inhibiting excessive inflammatory responses in the skin. DP also enhanced the gene expression of key factors involved in skin barrier maintenance, including Kazal-type 5 (SPINK5), loricrin (LOR), aquaporin-3 (AQP3), filaggrin (FLG), and keratin 1 (KRT1), suggesting its potential to maintain and protect the skin barrier. Western blot analysis revealed that DP inhibited TNF-α-induced phosphorylation of JNK and p38, implying that DP exerts antiaging effects through the regulation of the JNK and p38 signaling pathways. Collectively, these findings suggest that DP has significant potential as an antiaging agent.