PMID: 1211476Sep 1, 1975Paper

Prostaglandin control of renal circulation in the unanesthetized dog and baboon

The American Journal of Physiology
J A SwainS F Vatner

Abstract

Effects of indomethacin and meclofenamate, inhibitors of prostaglandin synthesis, were evaluated in the regulation of renal blood flow in conscious and anesthetized dogs and in tranquilized baboons, instrumented with arterial pressure catheters and renal blood flow probes. Indomethacin, 10 mg/kg, did not alter renal blood flow or resistance significantly in the conscious dog. In the anesthetized dog, however, indomethacin caused a reduction in renal blood flow (25 +/- 3% of control) and an elevation of renal vascular resistance (45 +/- 8% of control). Meclofenamate, 4 mg/kg, reduced renal flow (12 +/- 2%) and increased renal vascular resistance 15 +/- 4% in conscious dogs. In conscious dogs and tranquilized primates, indomethacin and meclofenamate reduced the reactive hyperemia in the renal bed after 15 s occlusion from a control of 36 +/- 5 ml to 6 +/- 2 ml, and after 45 s occlusion from a control of 98 +/- 9 ml to 17 +/- 5 ml. Methoxamine (10-50 mug/kg per min) and angiotensin II (0.03-0.12 mug/kg per min), infused in graded doses, induced significantly greater renal vasoconstriction in conscious dogs in the presence of indomethacin. Thus, in the conscious animal, prostaglandins appear to play only a minor role in the control...Continue Reading

Citations

Aug 1, 1987·Clinical and Experimental Pharmacology & Physiology·W P AndersonA I Gilchrist
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