RESUMEN
The anti-inflammatory activity of the dry distillation tar of delipidated soybean (GL, 0.1 approximately 10%) was investigated by its topical application to mice, rats and guinea pigs; and the effects were compared with those of betamethasone 17-valerate (BV, 0.12%), ibuprofen (IP, 5%), phenylbutazone (PB, 5%) and flufenamic acid (FA, 5%), which were all prepared with the same ointment base. GL (1 approximately 10%) showed a concentration-dependent inhibition of the increased vascular permeability induced by histamine and bradykinin in guinea pigs. GL significantly inhibited rat paw edema induced by carrageenin, but in serotonin-induced paw edema, GL showed only a weak effect. GL also inhibited the erythema formation induced by ultra-violet rays, and the activity was equal to that of PB. The inhibitory potency of GL against the erythema formation induced by arachidonic acid in guinea pigs was equal to that of IP. It is suggested from these results that the mode of action of GL is similar to that of other acidic non-steroidal anti-inflammatory drugs. However, GL did not inhibit paper disk granuloma in rats. Furthermore, GL markedly inhibited the delayed-type hypersensitivity induced by picryl chloride, and the activity was stronger than that of IB, PB and FA. Here GL showed the mode of action seen with steroidal anti-inflammatory drugs. The present data provide evidence that GL applied externally possesses a potent effect as an anti-inflammatory drug.