Anti-inflammatory drug actions on allergic responses in guinea-pig skin

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W PaulJ Morley


Five non-steroidal anti-inflammatory drugs (indomethacin, naproxen, meclofenamic acid, feprazone and phenylbutazone: NSAIDs) and three glucocorticosteroids (dexamethasone, hydrocortisone and prednisolone) have been tested as local inhibitors of increased vascular permeability in guinea-pig skin. Lesions were induced by histamine or by antigen to evoke type I (passive cutaneous anaphylaxis), type III (reverse passive Arthus) and type IV (delayed hypersensitivity) allergic reactions. NSAIDs and glucocorticosteroids caused either weak, inconsistent inhibition or slight, high-dose inhibition of the response to histamine. None of the drugs tested showed significant inhibition of the type IV response. The NSAIDs caused dose-related inhibition of both type I and type III responses whereas glucocorticosteroids were ineffective. Maximum inhibition with the NSAIDs was never greater than 50--60% Feprazone, meclofenamic acid and indomethacin were the most potent inhibitors of histamine, PCA and Arthus responses respectively. The possible significance of the effects of these anti-inflammatory agents on vascular permeability is discussed.


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Related Concepts

Anti-Inflammatory Agents
Arthus Reaction
Vascular Permeability
Cavia porcellus
Allergic Reaction
Delayed Hypersensitivity
Passive Cutaneous Anaphylaxis

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