International Journal of Clinical and Laboratory Research

, Volume 27, Issue 2, pp 178–184

Metabolic and hemodynamic effects of peptide leukotriene C4 and D4 in man

  • C. Vigorito
  • A. Giordano
  • R. Cirillo
  • A. Genovese
  • F. Rengo
  • G. Marone
Article

DOI: 10.1007/BF02912454

Cite this article as:
Vigorito, C., Giordano, A., Cirillo, R. et al. Int J Clin Lab Res (1997) 27: 178. doi:10.1007/BF02912454

Abstract

The time course of the effects of intravenous or intracoronary administration of peptide leukotrienes on metabolic parameters and on systemic and coronary hemodynamics was evaluated in 15 patients with normal coronary arteries. Peptide leukotriene C4 (2 nmol given as a bolus intravenous injection) induced an early fall (at 2 min) in mean arterial pressure (P<0.02) associated with a rise in heart rate (P<0.001) and in plasma levels of epinephrine (P<0.05) and norepinephrine (P<0.005), but without significant changes in coronary blood flow or coronary vascular resistance. Mean arterial pressure, heart rate, norepinephrine, and epinephrine returned to baseline values 10 min after leukotriene C4 administration. In contrast, at 10 min post leukotriene C4, with coronary blood flow and myocardial oxygen consumption unchanged, an increase in coronary vascular resistance (P<0.05) and in myocardial oxygen extraction (P<0.01) was observed, which returned to baseline values at 20 min post leukotriene C4. Peptide leukotriene D4(3 nmol, given in the left coronary artery) induced an early (20 s) and transient fall in mean arterial pressure (P<0.001 ) paralleled by a rise in heart rate and plasma levels of epinephrine and norepinephrine, all of which returned to baseline at 10 min. Coronary vascular resistance increased at 10 and 15 min (P<0.02 and P<0.05, respectively) and myocardial oxygen extraction at 15 min (P<0.02). These results suggest that small doses of peptide leukotrienes induce both an early and transient fall in mean arterial pressure associated with secondary sympathoadrenergic activation, and a late increase in small coronary arteriolar resistance.

Key words

Leukotriene C4Leukotriene D4Coronary blood flow

Copyright information

© Springer-Verlag 1997

Authors and Affiliations

  • C. Vigorito
    • 1
  • A. Giordano
    • 1
  • R. Cirillo
    • 1
  • A. Genovese
    • 1
  • F. Rengo
    • 1
  • G. Marone
    • 1
  1. 1.Department of MedicineUniversity of Naples Federico II, School of MedicineItaly