Platelet-activating factor modulates interleukin-6 production by mouse fibroblasts.
We compared the effects of platelet-activating factor (PAF), interleukin-1 beta (IL-1 beta) and polyriboinositic-polyribocytidylic acid (poly-I:C) on IL-6 production by confluent L929 mouse fibroblasts. At concentrations above 1 microM, PAF dose-dependently enhanced IL-6 production; at 5 microM PAF this increase (72.7 +/- 19.9 U/ml) was higher than that evoked by 100 U/ml IL-1 beta (5.7 +/- 0.4 U/ml) or 50 micrograms/ml poly-I:C (39.3 +/- 6.7 U/ml). The IL-6 production induced by 5 microM PAF was not inhibited by addition of the specific PAF antagonist BN 52021 (10 microM) to the incubation medium. These results demonstrate that, as this is the case for IL-1, PAF also modulates IL-6 production.
Institut Henri Beaufour, Les Ulis, France.
P
P
Braquet
B
B
Pignol
T
T
Maisonnet
J M
JM
Mencia-Huerta
D000818:Animals; D002460:Cell Line; D005347:Fibroblasts / Q000378:metabolism; D015850:Interleukin-6 / Q000096:biosynthesis*; D051379:Mice; D010972:Platelet Activating Factor / Q000494:pharmacology*
D015850:Interleukin-6; D010972:Platelet Activating Factor