Bronchial Reactivity to Prostaglandins F2α, E2, and Histamine in Different Types of Asthma

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Abstract
Bronchial reactivity to prostaglandins F2α (PGF2α), E2 (PGE2) and histamine has been studied in 27 patients with aspirin-sensitive asthma and in 28 asthmatics without this sensitivity. Of the latter group, 13 patients had atopic, 9 infectious, and 6 mixed type of asthma. Atopic patients were characterized by vivid reactivity to low doses of both PGF2α and histamine. In patients with infectious asthma significantly higher doses of both PGF2α and histamine were necessary to induce bronchoconstriction as compared to atopies. Aspirin-sensitive patients responded quickly with bronchial spasm to similar doses of histamine as atopies, but tolerated significantly higher doses of PGF2α. There was no difference in reactivity to PGF2α between patients with aspirin sensitivity and those with infectious asthma. 5 and 10 min after administration of 60 μg PGE2 significantly better improvement in ventilation occurred in aspirin-sensitive patients than in those of either atopic or infectious groups. The results obtained point to differences in bronchial reactivity to prostaglandins and histamine depending on type of asthma and severity of its symptoms.

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