Influence of an antagonist of slow-reacting substance of anaphylaxis on the cardiovascular manifestations of hypoxia in piglets

Ronald N. Goldberg, Cleide Suguihara, Tahir Ahmed, Belsy Deseda De Cudemus, Patricia Barrios, Emmalee S. Setzer, Eduardo Bancalari

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Leukotrienes have been implicated in the pathogenesis of hypoxic pulmonary hypertension in adult animals and in persistent pulmonary hypertension with accompanying hypoxemia in the neonate. In order to elucidate the role of leukotrienes in hypoxic pulmonary hypertension in a young animal model, the effects of a leukotriene antagonist, FPL 57231, were evaluated in anesthetized piglets. Cardiac output and vascular pressures were measured and pulmonary and systemic vascular resistances calculated prior to and during hypoxia. These measurements were compared during continued hypoxia between a control and treatment group which received FPL 57231. FPL 57231 infusion resulted in significant decreases in mean pulmonary artery pressure (p < 0.04), pulmonary vascular resistance (p < 0.01) and the ratio of pulmonary/systemic vascular resistance (p < 0.01). Systemic vascular resistance fell approximately 25% from hypoxic baseline (p < 0.01) while PVR decreased 54%. There were no differences between groups in mean systemic arterial pressure, cardiac output, pH, or PaCO2. In addition, pretreatment with FPL 57231 attenuated the hemodynamic response to hypoxia. These data suggest that leukotrienes may, in part, mediate hypoxic pulmonary vasoconstriction in piglets.

Original languageEnglish (US)
Pages (from-to)1201-1205
Number of pages5
JournalPediatric Research
Volume19
Issue number11
DOIs
StatePublished - Nov 1985

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health

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