The Journal of Experimental Medicine
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Journal of Experimental Medicine, Vol 146, 1719-1734, Copyright © 1977 by Rockefeller University Press


ARTICLES

Suppression of human T-cell mitogenesis by prostaglandin. Existence of a prostaglandin-producing suppressor cell

JS Goodwin, AD Bankhurst and RP Messner

Small amounts of PGE inhibit mitogen-induced [3H]thymidine incorporation in human peripheral lymphocytes. The 50% inhibitory concentration is approximately 10(-7) M, and this is reduced to approximately 10(-8) M when endogenous PGE production is blocked. PGE inhibits PHA- and Con A-stimulated cultures much better than PWM cultures, suggesting a differential effect of PGE on T-cell vs. B-cell function. In vitro blockade of PG synthesis results in approximately 50% increase in [3H]thymidine incorporation in PHA cultures. PGE is produced endogenously in PHA cultures by glass adherent suppressor cells.
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