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- W2397718313 abstract "Renal glomeruli were isolated from rat kidneys using a passive mechanical sieving technique. Glomerular microsomal fraction, glomerular homogenate, or intact glomeruli were incubated with [1-14C]arachidonic acid, and the profile of prostaglandin (PG) synthesis was determined by thin-layer chromatography. The three incubation systems produced 15.3, 20.8, and 40.4% 6-keto-PGF1 alpha; 19.1, 23.5, and 15.3 PGF2 alpha; 5.7, 9.1, and 3.9% thromboxane (TX) B2; 36.0, 35.1, and 37.0% PGE2; and 23.9, 11.3, and 3.4% PGD2, respectively. Glomeruli were placed in suspension within glass chambers and superfused with Krebs solution. Superfusion with 1.6 x 10(-4) M arachidonic acid stimulated a significant release of renin from glomeruli, whereas 2.7 x 10(-6) M PGE1, PGE2, PGF2 alpha, TXB2, PGD2, or a stable analog of PGH2 had no effect on renin. When the rapid breakdown of PGI2 was counteracted by either increasing the concentration to 1.7 x 10(-4) M or stabilizing in Krebs at pH 9.4, it stimulated a significant increase in renin release. Reducing the arachidonic acid concentration to 1.6 x 10(-5) M eliminated both renin release and PGI2 synthesis, while increased PGE2 synthesis persisted. Finally, using an inhibitor of PGI2 synthesis, azo analog 1 (2.8 x 10(-6) M), 6-keto-PGF1 alpha produced in response to arachidonic acid was eliminated, as was the concurrent release of renin, but PGE2 synthesis was not affected. These results suggest that the mechanism of direct interaction between renal PG and renin in isolated glomeruli is selectively due to the action of PGI2." @default.
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- W2397718313 date "1982-09-01" @default.
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- W2397718313 title "Renin release selectively stimulated by prostaglandin I2 in isolated rat glomeruli" @default.
- W2397718313 doi "https://doi.org/10.1152/ajprenal.1982.243.3.f276" @default.
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