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. 2017 Nov 7;7:14761. doi: 10.1038/s41598-017-15348-y

Figure 4.

Figure 4

The inhibitory effect of 5-HT on the LPS-induced pro-inflammatory cytokine production of human macrophages is dependent on 5-HT7R and PKA. (A) Production of LPS-stimulated IL-12p40 and TNFα by M-MØ non-treated (-) or pretreated with 5-HT (6 h) in the presence or absence of the 5-HT7R antagonists SB269970 or SB258719 (n = 6; *p < 0.05; **p < 0.01; ***p < 0.001). (B) Production of LPS-stimulated IL-12p40 and TNFα by M-MØ non-treated (-) or pretreated (6 h) with either 5-HT (5HT) or the 5-HT7R agonist AS19 (n = 6; *p < 0.05; **p < 0.01). (C) Production of LPS-stimulated IL-12p40 and TNFα by M-MØ non-treated (-) or pretreated with 5-HT (5HT, 6 h) in the presence or absence of the PKA inhibitor RP8 (n = 6; *p < 0.05; **p < 0.01).