Journal: PLOS Pathogens
Article Title: Choline metabolism underpins macrophage IL-4 polarization and RELMα up-regulation in helminth infection
doi: 10.1371/journal.ppat.1011658
Figure Lengend Snippet: A-D) Macrophages were treated with vehicle (DMSO) or HC3 (250 μM) for 24 h, washed, then treated with IL-4 (20 ng/mL) for 24 h. Relative expression of M[IL-4] hallmark genes Arg1 , Mrc1 , Chil3 , or Retnla normalized to Actb and compared to M[0]. n = 3–4, representative of 3–5 experiments. Unpaired t test (*** p < 0.001). E) Schematic of timing variations for inhibitors and IL-4 polarization. Macrophages were treated with vehicle (DMSO), HC3 (250 μM), or RSM (5 μM) in the first 24 h then polarized with IL-4 (20 ng/mL) for 24 h (POST). Inhibitors were given together with IL-4 for 24 h (CONC). Macrophages were polarized with IL-4 for 24 h, then treated with inhibitors for 24 h (PRE). Expression of Retnla normalized to Actb and compared to M[0]. n = 3, representative of 1 experiment. Two-way ANOVA with Tukey’s test for multiple comparisons (* p < 0.05, ** p < 0.01, *** p < 0.001, **** p < 0.0001). F) Macrophages were treated with vehicle (DMSO), HC3 (250 μM) or RSM-932a (5 μM) for 24 h, washed, then treated with IL-4 (20 ng/mL) for 15’ and stained for intracellular pSTAT6 (Tyr641). n = 3, representative of 3 experiments. Two-way ANOVA with Tukey’s test for multiple comparisons (** p < 0.01, **** p < 0.0001). G) Surface PD-L1 and PD-L2 expression in M[0], M[IL-4], or M[LPS], treated with vehicle, HC3 (250 μM) or RSM-932a (5 μM). n = 2, representative of 3 experiments. H) Macrophages were treated with vehicle (DMSO) or HC3 (250 μM) for 24 h, washed, then treated with IL-4 (20 ng/mL) for 24 h in complete or choline-deficient (ΔCho) media. B) Quantification of intracellular RELMα staining in live F480 + macrophages. n = 3, representative of >4 experiments. One-way ANOVA with Tukey’s test for multiple comparisons (* p < 0.05, ** p < 0.01). I) Macrophages were treated with vehicle (DMSO), HC3 (250 μM), or RSM-932a (5 μM) for 24 h, washed, then treated with IL-4 (20 ng/mL) for 24 h. Detection of supernatant RELMα by ELISA. n = 5 (vehicle, HC3, IL-4) or n = 2 (RSM). Unpaired t test (** p < 0.01). Schematics were created using BioRender.
Article Snippet: Recombinant RELMα, polyclonal rabbit anti-RELMα capture, and polyclonal biotinylated rabbit anti-RELMα detection antibodies (all Peprotech) were used according to a previously described protocol [ ].
Techniques: Expressing, Staining, Enzyme-linked Immunosorbent Assay