Platelet-activating factor is a renal vasodilator in the anesthetized rat

Rajash Handa, Jack W. Strandhoy, Vardaman M. Buckalew

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

In view of the potent vasoactive properties of platelet-activating factor (PAF), we investigated the renal hemodynamic effects of this lipid. C16-PAF (0.5-10 ng/kg) given as a bolus into the renal arterial circulation of pentobarbital sodium-anesthetized male Wistar rats produced a dose-dependent increase in renal blood flow (6-15%), before causing systemic hypotension. The PAF-induced renal vasodilation and systemic hypotension was independent of renal innervation, unaltered by eicosanoid synthesis inhibition with indomethacin or dexamethasone, unchanged by the nonselective dopamine-receptor antagonist haloperidol, but was abolished by the PAF-receptor antagonist, L-659,989. Nonhypotensive intrarenal PAF infusion at 0.5 ng · min-1 · kg-1 caused an increase in renal blood flow. Thus PAF can cause renal vasodilation in the rat kidney that is PAF-receptor mediated and does not involve the sympathetic nervous system or the release of vasodilatory arachidonic acid metabolites or dopamine.

Original languageEnglish (US)
JournalAmerican Journal of Physiology - Renal Fluid and Electrolyte Physiology
Volume258
Issue number6 27-6
StatePublished - 1990
Externally publishedYes

Fingerprint

Platelet Activating Factor
Vasodilator Agents
Renal Circulation
Kidney
Vasodilation
L 659989
Hypotension
Dopamine Antagonists
Eicosanoids
Sympathetic Nervous System
Haloperidol
Pentobarbital
Arachidonic Acid
Indomethacin
Dexamethasone
Wistar Rats
Dopamine
Hemodynamics
Lipids
platelet activating factor receptor

Keywords

  • Blood pressure
  • Dopamine
  • Eicosanoids
  • Renal blood flow
  • Renal nerves

ASJC Scopus subject areas

  • Physiology

Cite this

Platelet-activating factor is a renal vasodilator in the anesthetized rat. / Handa, Rajash; Strandhoy, Jack W.; Buckalew, Vardaman M.

In: American Journal of Physiology - Renal Fluid and Electrolyte Physiology, Vol. 258, No. 6 27-6, 1990.

Research output: Contribution to journalArticle

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