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- W2023162509 abstract "Immunoactive eicosanoids may have a role in both placental separation and uterine involution in cattle. In the present study, we examined the effects of bacterial cell wall preparation and endotoxins on in vitro prostaglandin synthesis and arachidonic acid (AA) metabolism by caruncular and allantochorionic tissues. Placentomes were obtained about 6 h post partum from cows that delivered normally (n = 10) or those with retained fetal membranes (n = 4); the tissue explants were incubated for 6 h in the presence of labeled or nonlabeled AA. Prostaglandin F2α (PGF2α) and E2 (PGE2) were measured by radioimmunoassay, and labeled AA metabolites were separated by reverse phase-high pressure-liquid chromatography. There was no effect of bacterial cell wall preparations or endotoxins on in vitro caruncular PGF2α secretion. However, bacterial products increased caruncular PGE2 secretion in both cows that delivered normally and those with retained fetal membranes. For normal delivery cows caruncular tissue, bacterial product also increased leukotriene B4 (LTB4) and decreased both thromboxane B2 (TXB2) and hydroxy-eicosatetranoic acids (HETE) in vitro secretion. For the allantochorion, bacterial products increased in vitro PGF2α secretion only in cows that delivered normally and increased PGE2 secretion essentially in cows with retained fetal membranes. In general, 6 keto PGF1α was the main metabolite secreted by both allantochorionic and carucular tissues. However, in cows with retained fetal membranes, PGE2 became the most important metabolite secreted by allantochorion, especially in the presence of endotoxin. In conclusion, these results suggest that bacteria found in the early postpartum uterus or their endotoxin affect primarily caruncular and allantochorionic PGE2 synthesis." @default.
- W2023162509 created "2016-06-24" @default.
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- W2023162509 date "1994-01-01" @default.
- W2023162509 modified "2023-10-01" @default.
- W2023162509 title "Effect of bacterial cell wall and lipopolysaccharide on arachidonic acid metabolism by caruncular and allantochorionic tissues from cows that calved normally and those that retained fetal membranes" @default.
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- W2023162509 doi "https://doi.org/10.1016/0093-691x(94)90508-g" @default.
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