Effects of Siegesbeckia herba extract against particulate matter 10 (PM10) in skin barrier‐disrupted mouse models

Objectives Skin barrier disruption is a significant problem of the older population in an aging society. It is characterized by increased transepidermal water loss and decreased skin water content, and particulate matter (PM) is a social issue that can contribute to the exacerbation of skin inflammation. Thus, addressing this problem is urgent. Methods Skin barrier‐disrupted mouse models were induced by two methods using acetone application or tape‐stripping. This study investigated the antioxidative and anti‐inflammatory properties of the Siegesbeckia herba extract (SHE) on PM‐induced changes in skin barrier‐disrupted mouse models. To examine changes in skin water content, inflammatory cytokines, and keratinocyte differentiation markers, mouse models were treated with vehicle 100 μL, PM10 100 μL (100 μg/mL), SHE 100 μL, or PM10 100 μL (100 μg/mL) plus SHE 100 μL. Results SHE preserved skin hydration in the skin barrier‐disrupted mouse models regardless of the presence of PM10. SHE also inhibited the upregulation of inflammatory cytokines such as interleukin (IL)‐1β, IL‐4, IL‐6, IL‐8, and tumor necrosis factor‐α and normalized the downregulation of keratinocyte differentiation markers against PM10 in skin barrier‐disrupted mouse models. Conclusions This study elucidated the therapeutic effects of SHE against PM10 in skin barrier‐disrupted mouse models.