Ann Dermatol.  2015 Apr;27(2):142-151. 10.5021/ad.2015.27.2.142.

Ethanol Extract of Peanut Sprout Exhibits a Potent Anti-Inflammatory Activity in Both an Oxazolone-Induced Contact Dermatitis Mouse Model and Compound 48/80-Treated HaCaT Cells

Affiliations
  • 1Department of Dermatology, Chonnam National University Medical School, Gwangju, Korea. schul@jnu.ac.kr
  • 2Department of Urology, Chonnam National University Medical School, Gwangju, Korea.
  • 3Jangsoochae Company, Chuncheon, Korea.

Abstract

BACKGROUND
We developed an ethanol extract of peanut sprouts (EPS), a peanut sprout-derived natural product, which contains a high level of trans-resveratrol (176.75 microg/ml) and was shown to have potent antioxidant activity.
OBJECTIVE
We evaluated the potential anti-inflammatory activity of EPS by measuring its antioxidant potential in skin.
METHODS
The anti-inflammatory activity of EPS was tested using two models of skin inflammation: oxazolone (OX)-induced contact dermatitis in mice and compound 48/80-treated HaCaT cells. As biomarkers of skin inflammation, cyclooxygenase-2 (COX-2) and nerve growth factor (NGF) levels were measured.
RESULTS
OX-induced contact dermatitis was suppressed markedly in mice that were treated with an ointment containing 5% EPS as evidenced by a decrease in the extent of scaling and thickening (p<0.05) and supported by a histological study. COX-2 (messenger RNA [mRNA] and protein) and NGF (mRNA) levels, which were upregulated in the skin of OX-treated mice, were suppressed markedly in the skin of OX+EPS-treated mice. Consistent with this, compound 48/80-induced expression of COX-2 (mRNA and protein) and NGF (mRNA) in HaCaT cells were suppressed by EPS treatment in a dose-dependent manner. As an inhibitor of NF-kappaB, IkappaB protein levels were dose-dependently upregulated by EPS. Fluorescence-activated cell sorting (FACS) analysis revealed that EPS scavenged compound 48/80-induced reactive oxygen species (ROS) in HaCaT cells.
CONCLUSION
EPS exerts a potent anti-inflammatory activity via its anti-oxidant activity in both mouse skin and compound 48/80-treated HaCaT cells in vitro. Compound 48/80-treated HaCaT cells are a useful new in vitro model of skin inflammation.

Keyword

Anti-inflammatory activity; Anti-oxidant activity; p-Methoxy-N-methylphenethylamine; Ethanol extract of peanut sprouts; Oxazolone-induced contact dermatitis
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