Abstract
The effects of sex hormones on the vitro production of prostaglandin (PG) E2 by monocytes were investigated. Monocytes were obtained from heparinized peripheral blood of healthy adults and incubated for 24 hours with lipopolysaccharide (LPS) and sex hormones. After incubation, the medium was assayed for PGE2 by means of radioimmunoassay. PGE2 production by monocytes was enhanced by progesterone. Estradiol reduced PGE2 production at 0.4 ng/ml, but enhanced it at 20 ng/ml. Testosterone reduced PGE2 production. The reduced PGE2 production by monocytes treated with 0.4 ng/ml of estradiol was restored to the control level by addition of progesterone at 20 ng/ml. These results suggest that sex hormones may modulate gingival inflammation mediated by PGE2.
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