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ORIGINAL ARTICLE
Year : 2011  |  Volume : 3  |  Issue : 3  |  Page : 155-159

Extract from peel of Citrus natsudaidai alleviates experimental chronic allergic dermatitis in mice


1 Department of Geriatric Pharmacology and Therapeutics, Graduate School of Pharmaceutical Sciences, Chiba University, Japan
2 Department of Geriatric Pharmacology and Therapeutics, Graduate School of Pharmaceutical Sciences, Chiba University; Center for Preventive Medical Science, Chiba University, Japan

Correspondence Address:
Katsunori Yamaura
1-8-1 Inohana, Chuo-ku, Chiba 260-8675
Japan
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Source of Support: Grant-in-aid from Chiba University, Japan, Conflict of Interest: None


DOI: 10.4103/0974-8490.84999

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Background: Citrus natsudaidai (natsumikan) is a typical citrus fruit containing several antioxidative nutrients which are found in higher concentration in the peel than in the pulp of the fruit. In this study, we examined whether extract from immature natsumikan peel prevents development of chronic allergic dermatitis in mice. Materials and Methods: Chronic allergic dermatitis was induced by repeated application of 2, 4, 6-trinitro-1-chlorobenzene in BALB/c mice and natsumikan was administrated orally for 30 days. Ear swelling and dermatitis score were measured after each challenge. The level of derivative-reactive oxygen metabolites (d-ROM) in serum was measured on day 30. Results: Treatment of natsumikan significantly attenuated the increase in ear swelling and improved dermatitis scores. In addition, increases in serum d-ROM were attenuated by a treatment of natsumikan. Although the routine treatment with dexamethasone resulted in a clear and significant reduction in body weight, natsumikan treatment did not have such effects. Conclusion: Immature natsumikan peel is beneficial for the treatment of chronic allergic dermatitis.


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