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Effects of NaHS and L-cysteine on the contents of IL-1β and IL-18 in the culture media of human placental cells. ELISA was performed to determine IL-1β and IL-18 contents. NaHS regulated the contents of (A) IL-1β and (B) IL-18 in the culture media. L-cysteine regulated the contents of (C) IL-1β and (D) IL-18 in the culture media. Data are presented as the mean ± SEM (n=4). *P<0.05 and **P<0.01. IL, interleukin.
