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- W2159702479 abstract "Prostaglandin D2 (PGD2) was recently found to be stereospecifically converted to the compound (5Z,13E)-(15S)-9 alpha,11 beta,15-trihydroxyprosta-5,13-dien-1-oic acid (9 alpha,11 beta-PGF2) by a human liver cytosolic NADPH-dependent 11-ketoreductase enzyme. Because PGD2 is a potent bronchoconstrictor and is released into bronchoalveolar lavage fluid after allergen stimulation in patients with allergic asthma, the ability of human lung to metabolize PGD2 to 9 alpha,11 beta-PGF2 and the contractile effects of 9 alpha,11 beta-PGF2 on human bronchial smooth muscle were investigated. The 100,000 X g supernatant of human lung converted PGD2 in the presence of an NADPH-generating system stereospecifically to 9 alpha,11 beta-PGF2 at a rate of 3.46 +/- 0.94 pmol per min per mg of protein. 9 alpha,11 beta-PGF2 was found to contract human bronchial rings in a dose-dependent fashion with a potency virtually identical with that of both PGD2 and PGF2 alpha, known potent bronchial constrictors. PGD2 was found to be a very poor substrate for human lung 15-hydroxyprostaglandin dehydrogenases and to be preferentially metabolized by lung to 9 alpha,11 beta-PGF2. 9 alpha,11 beta-PGF2 was also found to be a very poor substrate for the lung 15-hydroxyprostaglandin dehydrogenases. Thus, once formed, 9 alpha,11 beta-PGF2 would not be expected to be rapidly inactivated in situ by these metabolic enzymes. These results suggest that 9 alpha,11 beta-PGF2 may participate along with other putative mediators in the pulmonary allergic response in humans." @default.
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- W2159702479 date "1987-01-01" @default.
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- W2159702479 title "(5Z,13E)-(15S)-9 alpha,11 beta,15-trihydroxyprosta-5,13-dien-1-oic acid (9 alpha,11 beta-prostaglandin F2): formation and metabolism by human lung and contractile effects on human bronchial smooth muscle." @default.
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- W2159702479 doi "https://doi.org/10.1073/pnas.84.1.256" @default.
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