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. 2015 Jun 1;2015:484528. doi: 10.1155/2015/484528

Figure 4.

Figure 4

Changes of IL-6 levels under different conditions. (a) Concentration of IL-6 secreted by MSCs pretreated for different durations (1 day, 3 days, and 5 days). The secreting durations (1 day, 3 days, and 5 days) after pretreatment were different, too. Paired t-test was used. (b) Concentration of IL-6 in coculture and noncoculture groups. Paired t-test was used. (c) Relative mRNA amount showed the principal cell source of IL-6. (d) Effects of IFN-γ and TNF-α on production of IL-6 by MSCs. One-way ANOVA was used. ∗ P < 0.05, ∗∗ P < 0.01, and # P < 0.001.