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DOI: 10.1055/s-2005-864137
© Georg Thieme Verlag KG Stuttgart · New York
Topical Application of Luteolin Inhibits Scratching Behavior Associated with Allergic Cutaneous Reaction in Mice
Publication History
Received: July 26, 2004
Accepted: December 12, 2004
Publication Date:
01 June 2005 (online)
![](https://www.thieme-connect.de/media/plantamedica/200505/lookinside/thumbnails/10.1055-s-2005-864137-1.jpg)
Abstract
The present study is aimed at evaluating the effects of luteolin on the scratching behavior associated with an allergic cutaneous reaction in mice. Elicitation of passive cutaneous anaphylaxis, and intradermal injections of compound 48/80, histamine or serotonin induced scratching behavior in ICR mice. Models of irritant contact dermatitis and allergic contact dermatitis were prepared by the topical application of 2,4-dinitrochlorobenzene (DNCB) on the ears of mice. Topical application of luteolin at concentrations of 20 and 100 μg/site significantly inhibited the number of scratching incidents associated with passive cutaneous anaphylaxis, and a similar tendency was also observed in histamine-, serotonin- and compound 48/80-evoked cutaneous reactions. The vascular permeability increase induced by passive cutaneous anaphylaxis or histamine injection was also significantly reduced by luteolin. Luteolin showed a potent inhibition on the ear thickness increase in models of irritant contact dermatitis and allergic contact dermatitis. In conclusion, luteolin significantly inhibited the scratching behavior associated with allergic cutaneous anaphylaxis. Its effects against pruritus are mainly attributed to its inhibition of mediator release from activated mast cells and direct antagonist effects on the released mediators which may act as local pruritogens.
Key words
Luteolin - scratching behavior - passive cutaneous anaphylaxis - compound 48/80 - histamine - serotonin - dermatitis
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Liu Baolin
Department of Pharmacology of Chinese Materia Medica
China Pharmaceutical University
Nanjing 210038
People’s Republic of China
Fax: +86-025-5288-3499
Email: NJLBL55@SOHU.com