Search results for: TGFâ1 Active Human Recombinant Protein
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Effect of cytokines on prostaglandin E2 and prostacyclin production in primary cultures of human myometrial cells.
The objective of this study was to characterize interleukin-1, -6, and -8 (IL-1-, IL-6-, and IL-8)-induced prostacyclin (PGI2 as 6-keto PGF1 alpha) and prostaglandin E2 (PGE2) production in primary cultures of human myometrial cells. Prostaglandins (PGs) released into the culture media were quantitated by specific radioimmunoassays. IL-1, but not IL-6 or IL-8, caused a dose- and time-dependent increase in the production of both PGI2 and PGE2. Half-maximally stimulating doses (EC50) of IL-1 were about 0.1 ng/ml, and maximal responses were observed at 1-10 ng/ml, amounting to 15- to 23-fold increases over unstimulated controls. The action of IL-1 was greatly potentiated by the protein kinase C-activating phorbol ester, TPA, and inhibited by actinomycin D and cycloheximide. IL-1-induced PG production was also suppressed by dexamethasone, by the natural IL-1 receptor antagonist (IL-1ra), and by transforming growth factor1 beta (TGF1 beta). It is concluded that IL-1 is a potent agonist of PG synthesis in human myometrial cells, acting by a mechanism dependent on the synthesis of new proteins, presumably key enzymes (phospholipase A2 and/or cyclo-oxygenase-2). This study has added further support to the notion that the myometrium serves as a target for the inflammatory cytokine, IL-1, and thereby may be affected directly, thus promoting preterm labor associated with intrauterine infection.H M Todd, V L Dundoo, W R Gerber, C A Cwiak, J J Baldassare, F Hertelendy
2595 related Products with: Effect of cytokines on prostaglandin E2 and prostacyclin production in primary cultures of human myometrial cells.
1.00 flask16 Arrays/Slide1.00 flask16 Arrays/Slide1 mg100 μg10 ug100 μg1.00 flask1.00 flask16 Arrays/Slide100 μgRelated Pathways
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