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 mug/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.
journal_name
Planta Medjournal_title
Planta medicaauthors
Baolin L,Weiwei W,Ning Tdoi
10.1055/s-2005-864137subject
Has Abstractpub_date
2005-05-01 00:00:00pages
424-8issue
5eissn
0032-0943issn
1439-0221journal_volume
71pub_type
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