Journal: The Korean Journal of Pain
Article Title: IL-27-Ucp2-FoxO3 axis mediating the polarization of alternatively activated macrophages and ameliorating inflammatory pain
doi: 10.3344/kjp.25307
Figure Lengend Snippet: FoxO3 controls IL-27-induced AAM differentiation and mitigates inflammatory pain in mice. (A) Immunofluorescence (IF) microscopy of FoxO3 in the nucleus of BMDMs upon stimulation with either NC, IL-27 (100 ng/mL for 12 hours), and IL-4 (20 ng/mL for 24 hours). n = 3, The scale bar indicates 1cm, and (B) the P values were tested by a one-way ANOVA with Tukey’s multiple comparisons test. (C) By comparing the knockdown efficiencies of three candidate siRNAs targeting FoxO3, Si#1 was identified as the most effective and will use it in subsequent experiments. GAPDH was used as a reference, n = 3, and the P values ( vs. NC) were tested by a one-way ANOVA with Dunnett’s post hoc test. (D) Compared to the FoxO3 mRNA in WT and/or si-Fxox3-treated BMDM in response to IL-27 (100 ng/mL for 12 hours) and IL-4 (20 ng/mL for 24 hours) treatment. GAPDH was used as a reference, n = 4, and the P values (si-FoxO3 vs. WT in NC/IL-27/IL-4 treatment) were tested by two-way ANOVA with Tukey’s multiple comparisons test. (E–G) Three M2 markers (Arg-1, Chi3l3, Retnla) were assessed by qPCR (E) and ELISA methods (F, G) in WT and/or si-Fxox3-treated BMDM in response to IL-27 (100 ng/mL for 12 hours) and IL-4 (20 ng/mL for 24 hours) treatment. GAPDH was used as a reference, n = 3, and the P values (si-FoxO3 vs. WT in NC/IL-27/IL-4 treatment) were tested by two-way ANOVA with Tukey’s multiple comparisons test. (H) Flowchart of the experimental process of the adoptive transfer strategy. (I, J) Course of mechanical hyperalgesia in mice with five different intervention groups. (I) The BMDM transfer time was indicated, n = 5, and P values (M vs. MSF3) were tested by two-way ANOVA with Tukey’s multiple comparisons test. (J) The results of IL-27M-IL-27MSF3 groups. N = 5, and P values (IL-27M vs. IL-27MSF3) were tested by two-way ANOVA with Tukey’s multiple comparisons test. * P < 0.05, ** P < 0.01, *** P < 0.001, ns: not significant. Data are shown as mean ± standard error of the mean. FoxO3: forkhead box class O3, IL: interleukin, Ucp2: uncoupling protein 2, AAM: alternatively activated macrophage, BMDM: bone marrow-derived macrophage, WT: wild type, M: macrophages, MSF3: macrophage + si-FoxO3, IL-27M: IL-27-primed macrophage, IL-27MSF3: IL-27-primed macrophage+si-FoxO3.
Article Snippet: The forced elevation of IL-27 concentration in the mice was obtained by i.v. injection of recombinant mouse IL-27 cytokine (rIL-27, MCE) ( ).
Techniques: Immunofluorescence, Microscopy, Knockdown, Enzyme-linked Immunosorbent Assay, Adoptive Transfer Assay, Derivative Assay