Figure 3M.tb CFU in WT mouse BMMs pre-treated with EVs minus co-treatment with IFN-ɣ. BMMs were treated with EVs from uninfected (EVs_Control) or M.tb-infected (EVs_M.tb) cells for 0, 24, 48 and 72 hr following a 1 hr M.tb infection. Mock, no EV treatment. Data shown are the mean ± SD of three independent infections and all data shown are representative of at least three independent experiments. ; * p < 0.05, ** p < 0.01 and *** p < 0.001 by two-tailed Student's t-test. M.tb CFU in WT mouse BMMs pre-treated with EVs plus (B) co-treatment with IFN-ɣ. BMMs were treated with EVs from uninfected (EVs_Control) or M.tb-infected (EVs_M.tb) cells for 0, 24, 48 and 72 hr following a 1 hr M.tb infection. Mock, no EV treatment. Data shown are the mean ± SD of three independent infections and all data shown are representative of at least three independent experiments. ; * p < 0.05, ** p < 0.01 and *** p < 0.001 by two-tailed Student's t-test. Immunofluorescence microscopy analysis for colocalization of M.tb (GFP) with lysosome marker Lamp-1 in WT mouse BMMs. Cells were pre-treated for 5 hr with EVs from uninfected or M.tb-infected macrophages plus IFN-γ, and then infected with GFP-expressing M.tb for 24 hr prior to immunostaining. quantitative analysis of M.tb colocalization with Lamp-1 in WT mouse BMMs Data shown are the mean ± SD of three independent infections and all data shown are representative of at least three independent experiments. Scale bar, 5 μM n.s., not significant; * p < 0.05, ** p < 0.01 and *** p < 0.001 by two-tailed Student's t-test. Immunofluorescence microscopy analysis for colocalization of M.tb (GFP) with lysosome marker Lamp-1 in Mavs-/- (E and F) mouse BMMs. Cells were pre-treated for 5 hr with EVs from uninfected or M.tb-infected macrophages plus IFN-γ, and then infected with GFP-expressing M.tb for 24 hr prior to immunostaining. quantitative analysis of M.tb colocalization with Lamp-1 in Mavs-/- mouse BMMs Data shown are the mean ± SD of three independent infections and all data shown are representative of at least three independent experiments. Scale bar, 5 μM n.s., not significant; * p < 0.05, ** p < 0.01 and *** p < 0.001 by two-tailed Student's t-test. Immunofluorescence microscopy as described above except using control siRNA-treated (G and H) BMMs. quantitative analysis of M.tb colocalization with Lamp-1 in control siRNA-treated mouse BMMs Data shown are the mean ± SD of three independent infections and all data shown are representative of at least three independent experiments. Scale bar, 5 μM n.s., not significant; * p < 0.05, ** p < 0.01 and *** p < 0.001 by two-tailed Student's t-test. Immunofluorescence microscopy as described above except using RIG-I siRNA-treated (I and J) BMMs. quantitative analysis of M.tb colocalization with Lamp-1 in RIG-I siRNA-treated mouse BMMs Data shown are the mean ± SD of three independent infections and all data shown are representative of at least three independent experiments. Scale bar, 5 μM n.s., not significant; * p < 0.05, ** p < 0.01 and *** p < 0.001 by two-tailed Student's t-test. M.tb CFU in infected Mavs-/- (K) mouse BMMs pre-treated with IFN-ɣ plus EVs from uninfected (EVs_Control) or M.tb-infected (EVs_M.tb) BMMs. CFU was determined immediately after the 1 hr infection or 24 and 72 hr post-infection. Data shown are the mean ± SD of three independent infections and all data shown are representative of at least three independent experiments. ; * p < 0.05, ** p < 0.01 and *** p < 0.001 by two-tailed Student's t-test. M.tb CFU in control siRNA-treated (L) or RIG-I siRNA-treated (M) mouse BMMs pre-treated with IFN-ɣ plus EVs from uninfected (EVs_Control) or M.tb-infected (EVs_M.tb) BMMs. CFU was determined immediately after the 1 hr infection or 24 and 72 hr post-infection. Data shown are the mean ± SD of three independent infections and all data shown are representative of at least three independent experiments. * p < 0.05, ** p < 0.01 and *** p < 0.001 by two-tailed Student's t-test.