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- W2047883325 abstract "The fetus and prematurely delivered newborn lamb have high concentrations of circulating PGE2 that may play a hormonal role, particularly in maintaining the patency of the ductus arteriosus. We studied the ability of the isolated, perfused lung from immature (100 +/- 2 days gestation, +/- SEM n = 8) and near term (142 +/- 1 days, n = 10; term is 150 days) lamb fetuses to metabolize PGE2 as a function of PGE2 concentration in the perfusate. After an intra-arterial infusion of 3H-PGE2 and 14C-inulin (to act as a marker of extracellular space), the bulk of the 14C-inulin was rapidly cleared through the isolated lung and the majority of the 3H activity appeared after the 14C activity had fallen to negligible values. The 3H activity that was retained longer in the lung was primarily associated with the 15-keto prostaglandin E2 and 15-keto-13,14 dihydro prostaglandin E2 metabolites. Lungs from immature fetal lambs metabolized 25% less PGE2 than did lungs from animals near term. This is consistent with our prior observation that premature lambs have decreased plasma clearance rates (in vivo) and elevated circulating concentrations of PGE2 when compared with term newborn lambs." @default.
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- W2047883325 date "1981-03-01" @default.
- W2047883325 modified "2023-10-16" @default.
- W2047883325 title "Effect of gestational age on pulmonary metabolism of prostaglandin E1 & E2" @default.
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- W2047883325 doi "https://doi.org/10.1016/0090-6980(81)90095-2" @default.
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