Dieckol, a Component of Ecklonia cava, Suppresses the Production of MDC/CCL22 via Down-Regulating STAT1 Pathway in Interferon-γ Stimulated HaCaT Human Keratinocytes.

Abstract

Macrophage-derived chemokine, C-C motif chemokine 22 (MDC/CCL22), is one of the inflammatory chemokines that controls the movement of monocytes, monocyte-derived dendritic cells, and natural killer cells. Serum and skin MDC/CCL22 levels are elevated in atopic dermatitis, which suggests that the chemokines produced from keratinocytes are responsible for attracting inflammatory lymphocytes to the skin. A major signaling pathway in the interferon-γ (IFN-γ)-stimulated inflammation response involves the signal transducers and activators of transcription 1 (STAT1). In the present study, we investigated the anti-inflammatory effect of dieckol and its possible action mechanisms in the category of skin inflammation including atopic dermatitis. Dieckol inhibited MDC/CCL22 production induced by IFN-γ (10 ng/mL) in a dose dependent manner. Dieckol (5 and 10 μM) suppressed the phosphorylation and the nuclear translocation of STAT1. These results suggest that dieckol exhibits anti-inflammatory effect via the down-regulation of STAT1 activation.

• Authors: Na-Jin Kang, Dong-Hwan Koo, Gyeoung-Jin Kang, Sang-Chul Han, Bang-Won Lee, Young-Sang Koh, Jin-Won Hyun, Nam-Ho Lee, Mi-Hee Ko, Hee-Kyoung Kang, Eun-Sook Yoo
• Journal: Biomolecules & therapeutics (Biomol Ther (Seoul)) Vol. 23 Issue 3 Pg. 238-44 (May 2015) ISSN: 1976-9148 [Print] Korea (South)
• PMID: 25995822 (Publication Type: Journal Article)