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. 2019 Feb 4;9:1177. doi: 10.1038/s41598-018-38018-z

Figure 3.

Figure 3

In vitro 5-HT release is stimulated by Clostridium ramosum. (A) Level of 5-HT released from RIN14B cells after exposure to C. ramosum supernatant, heat inactivated cell lysate or to ionomycin for 1 h. Means ± SEM of n = 7–12 per group are shown. (B) Level of 5-HT released from mouse small intestinal organoids after exposure to culture supernatant or heat inactivated cell lysate of C. ramosum for 7 days. Means ± SEM of n = 6 per group are shown. (C) mRNA expression of Tph1 and SERT derived from RIN14B cells 1 h after exposure to culture supernatant or heat killed lysate of C. ramosum, or to ionomycin. (D) Level of 5-HT released from mouse colonic organoids after exposure to culture supernatant or heat inactivated cell lysate of C. ramosum and 2% lipid mixture. Means ± SEM of n = 2–3 per group are shown. Differences among all 6 groups were analyzed by one-way Anova and Tukey’s multiple comparison tests. *p < 0.05; **p < 0.01. #p < 0.05; ##p < 0.01 for Cra lysates + lipid mixture versus vehicle + lipid mixture and Cra supernatant respectively. (E) Level of 5-HT released from RIN14B cells after exposure to supernatants or heat inactivated cell lysates of Anaerostipes caccae, Bacteroides thetaiotaomicron, Bifidobacterium longum, Blautia product, Clostridium butyricum, Escherichia coli, Clostridium ramosum and Lactobacillus plantarum and vehicle (BHI:YCFA medium). Means ± SEM of n = 6 per group are shown. Differences among all groups were analyzed by Kruskal-Wallis and Dunn’s Post-hoc tests. *p < 0.05; **p < 0.01.