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Dose-dependent suppression by LF-33 of endotoxin-induced TNF-α secretion by RAW 264.7 cells in human serum. E. coli LPS at 10 ng/ml was incubated at 37°C for 1 h with human serum and LF-33 at the concentrations indicated before being exposed to RAW 264.7 cells. All data were the means of triplicates in representative experiments.
