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• W1551289473 abstract "We have developed a highly sensitive and specific solid-phase enzyme immunoassay for 9-deoxy-delta 9,delta 12-dihydroprostaglandin D2 (delta 12-PGJ2) and studied the occurrence of this novel PGD2 metabolite in human urine. The assay detected delta 12-PGJ2 over the range of 2-200 pg, and the antiserum showed 2% cross-reaction with PGJ2 and less than 0.2% with other PGs. We used this assay and purified the delta 12-PGJ2-like immunoreactive substance from human urine. Purification consisted of chromatographies on a Sep-Pak C18 cartridge, a silicic acid column, reversed-phase high-performance liquid chromatography, and finally an affinity column of anti-delta 12-PGJ2 antibody. As a result, about 850 ng of delta 12-PGJ2-like immunoreactive substance were recovered from 60 liters of human urine. The purified material was identified as delta 12-PGJ2 by gas chromatography/high resolution-selected ion monitoring using the molecular ion m/z 448[M]+. and ions [M - 15]+, [M - 43]+, [M - 100]+., and [M - 143]+. The amounts of delta 12-PGJ2 in the urine from normal, volunteer men and women were 151.5 +/- 20.0 and 65.6 +/- 5.4 ng/24 h (mean +/- S.E., n = 5), respectively. The delta 12-PGJ2 amount in urine did not alter significantly during storage for at least 24 h or by the addition of authentic PGD2 to urine samples, suggesting that the delta 12-PGJ2 we determined was not derived from the decomposition of PGD2 in the urine during storage or purification. Moreover, when a single dose of PGD2 (1 mg/kg) was injected intravenously into cynomolgus monkeys, the urinary level of delta 12-PGJ2 increased 20- to 180-fold over the normal levels, whereas the delta 12-PGJ2 level decreased by 40-50% of the normal levels, following the administration of indomethacin at a dose of 1 mg/kg. These results indicate that delta 12-PGJ2 is formed naturally in the body and excreted as a urinary PGD2 metabolite." @default.
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• W1551289473 date "1988-11-01" @default.
• W1551289473 modified "2023-10-12" @default.
• W1551289473 title "Occurrence of 9-deoxy-delta 9,delta 12-13,14-dihydroprostaglandin D2 in human urine." @default.
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• W1551289473 doi "https://doi.org/10.1016/s0021-9258(18)37435-0" @default.
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