Abstract
Canine kidneys were autoperfused in situ at constant flow in 28 experiments. Renal venous effluent was examined for (PLM) prostaglandin-like material following acidic lipid extraction and thin layer chromatography or by continuous bioassay utilizing the bloodbathed organ technique. There was a low basal efflux of PLM from the kidney which was markedly enhanced during the renal vascular constriction elicited by renal nerve stimulation at 2-10 cycles/second or by infusion of norepinephrine. The PLM was tentatively identified as an E-type prostaglandin based on chromatographic behavior and bioassay. The present study indicates that PLM is released from the dog kidney during an increase in renal vascular resistance. Release is not necessarily dependent upon changes in total renal blood flow although alterations in the distribution of intrarenal blood flow might be involved. (authors)
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