[Effect of nonsteroid anti-inflammatory substances on mediators of inflammation]

The action of nonsteroid antiinflammatory substances on the content in the inflammation focus of the inflammation reaction mediators, histamine, serotonin and kinines, and some aspects of their metabolism were studied. Sodium mephenaminate and butadion are shown to bring down the histamine content in the exudate of rats with experimental pleurisy. Sodium mephenaminate depresses the histamine synthesis (by inhibiting histidine decarboxylase in the pulmonary tissue), while butadion activates decomposition of this amine (by raising histaminase activity). All the study compounds (except sodium mephenaminate) force down the serotonin level in the exudate and inhibit 5-hydroxytryptophan decarboxylase. The content of kininogen in the exudate decreases only under the influence of butadion. Sodium mephenaminate and butadion mitigate the reaction of the dermal vessels to exogenous histamine and serotonin and chingamine does so only in response to histamine.