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Effects of Intravenous Administration of Slow-Reacting Substance of Anaphylaxis, Histamine, Bradykinin, and Prostaglandin F2α on Pulmonary Mechanics in the Guinea Pig
Jeffrey M. Drazen, K. Frank Austen
Jeffrey M. Drazen, K. Frank Austen
Published June 1, 1974
Citation Information: J Clin Invest. 1974;53(6):1679-1685. https://doi.org/10.1172/JCI107719.
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Effects of Intravenous Administration of Slow-Reacting Substance of Anaphylaxis, Histamine, Bradykinin, and Prostaglandin F2α on Pulmonary Mechanics in the Guinea Pig

Abstract

The effects of intravenous administration of a purified preparation of slow-reacting substance of anaphylaxis (SRS-A), histamine, bradykinin, and prostaglandin F2α (PGF2α) on the mechanics of respiration were assessed in the unanesthetized guinea pig. Geometrically increasing doses of SRS-A resulted in graded decreases in average pulmonary compliance, with only modest increases in average pulmonary resistance. A dose with apparent maximal effects. 3,000 U/kg, resulted in a decrease of 49±7% of compliance below control values, with an increase in resistance of 24±8% above control. Intravenous administration of geometrically increasing amounts of histamine, bradykinin, and prostaglandin F2α also resulted in decreased compliance; but in each case this was accompanied by a marked increase in respiratory resistance. A decrease of compliance of approximately 50%, induced by intravenous histamine, bradykinin, or PGF2α, was accompanied by an increase of 60-140% in resistance. Thus, intravenously administered SRS-A alters pulmonary mechanics with a more peripheral effect than any of the other agents tested.

Authors

Jeffrey M. Drazen, K. Frank Austen

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