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      Human choriogonadotropin (hCG) and placental lactogen (hPL) inhibit interleukin-2 (IL-2) and increase interleukin-1 beta (IL-1 beta), -6 (IL-6) and tumor necrosis factor (TNF-alpha) expression in monocyte cell cultures.

      Journal of perinatal medicine
      Cells, Cultured, Chorionic Gonadotropin, pharmacology, Cytokines, secretion, Dose-Response Relationship, Drug, Humans, Interleukin-1, Interleukin-2, Interleukin-6, Monocytes, Phytohemagglutinins, Placental Lactogen, Time Factors, Tumor Necrosis Factor-alpha

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          The effect of the human trophoblast hormones chorionic gonadotropin (hCG) and placental lactogen (hPL) on the expression of cytokines in peripheral blood mononuclear cell cultures was followed under a variety of culture conditions, (a) phytohemagglutinin stimulated cells (PHA-MSC), (b) allogenic mixed cells (AMC) and (c) spontaneously proliferating cells (SPC). A dose dependent enhanced release of IL-6, IL-1 beta and TNF-alpha by hCG and hPL was observed under all culture conditions. However, an inhibitory effect on the IL-2 release was seen in PHA-MSC by hPL and in AMC by hPL and hCG. The role of the suppression of IL-2 production/release on cytotoxicity towards trophoblast is discussed. These results suggest a sensitive, dose dependent hormonal control of the modulation of the immune response during pregnancy and strengthen the concept of a distinct regulation of monocytes and lymphocyte subpopulation by trophoblast hormones.

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