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Phytother Res. 2016 Apr;30(4):636-45. doi: 10.1002/ptr.5573. Epub 2016 Feb 3.

The Hot-Water Extract of Smilacis Chinae Rhizome Suppresses 2,4-Dinitrochlorobenzene and House Dust Mite-Induced Atopic Dermatitis-Like Skin Lesions in Mice.

Author information

1
Department of Biomedical Chemistry, College of Biomedical and Health Sciences, Konkuk University, Chungju, 27478, Korea.
2
Chemon Non-clinical Research Institute, Yangji, 17162, Korea.
3
Industrial Medicine Department, Chungju Hospital, Konkuk Medical School, Konkuk University, Chungju, 27478, Korea.
4
Division of Sport Science, College of Science and Technology, Konkuk University, Chungju, 27478, Korea.
5
College of Pharmacy, Chung-Ang University, Seoul, 06974, Korea.
6
Novarex Co., Ltd, Seoul, 06626, Korea.

Abstract

Smilacis Chinae Rhizome (SCR) has been used as an oriental folk medicine for various biological activities. However, its effect on atopic dermatitis (AD) remains undetermined to date. We assessed the effect of orally administered hot-water extract of SCR on AD-like skin lesions in mice and its underlying mechanisms. AD-like murine model was prepared by repeated alternate application of house dust mite (Dermatophagoides farinae) extract (DFE) and 2,4-dinitrochlorobenzene (DNCB) for 4 weeks, topically to the ears. Daily oral administration of SCR for 3 and 4 weeks significantly reduced inflammatory ear thickening, with the effect being enhanced at the earlier start and longer period of administration. This effect was accompanied by a significant decrease in both Th2 and Th1 serum antibodies (total IgE, DFE-specific IgE, and IgG2a). Histological analysis showed that SCR markedly decreased the epidermal/dermal ear thickening and the dermal infiltration of inflammatory cells. Furthermore, SCR suppressed DFE/DNCB-induced expression of IL-4, IL-13, IL-17, IL-18, TSLP, and IFN-γ genes in the ear tissue. Taken together, our observations demonstrate that chronic oral administration of SCR exerts beneficial effect in mouse AD model, suggesting that SCR has the therapeutic potential as an orally active treatment of AD by modulating both Th1 and Th2 responses.

KEYWORDS:

DFE/DNCB; Smilacis Chinae Rhizome; Th1; Th2; atopic dermatitis; inflammation

PMID:
26840656
DOI:
10.1002/ptr.5573
[Indexed for MEDLINE]

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