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Effect of substances on PGE2 production in LPS-induced HGFs. HGFs were incubated with 10 μg/ml PDS, COX-2 inhibitor NS-398 or 10 μg/ml NBBA for 30 min before LPS (1 μg/ml) was added. After 24 h of incubation time, the supernatants were evaluated for IL-6 levels by ELISA.
