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. 2023 Mar 16;24(5):827–840. doi: 10.1038/s41590-023-01468-3

Fig. 3. A vacant interstitial macrophage niche is repopulated by Ccr2-dependent classical monocyte differentiating into interstitial macrophages.

Fig. 3

a, Representative plots of Ly6C and CD64 expression within lung AM-excluded CD45+F4/80+SSCloCD11b+ cells at days 0, 0.5, 1, 2, 3, 7 and 14 after 50 ng DT i.p. in IMDTR mice. b, Time course of absolute numbers of cMo, pMo, AMs, bulk IMs, CD206 IMs and CD206+ IMs quantified by flow cytometry in IMDTR and littermate controls, as in a. Data show the mean (centerline) ± s.e.m. (colored area) and are pooled from ≥2 independent experiments (n = 8–10 mice per time point). c, Amount of Ccl2 in the lung and serum of IMDTR and littermate controls at 0, 12, 24 and 48 h after DT i.p. injection. d,e, Representative CD45.1 and CD45.2 contour plots (d) and bar graphs showing the percentage of CD45.1 donor and CD45.2 host chimerism (e) in the indicated cell populations from lethally irradiated thorax-protected CD45.2 IMDTR mice reconstituted with CD45.1 wild-type BM donor cells, injected or not with 50 ng DT i.p. 4 weeks later and evaluated at day 7 after DT. f,g, Representative CD45.1 and CD45.2 contour plots (f) and bar graphs showing the percentage of Ccr2+/+ donor, Ccr2−/− donor and host chimerism (g) in the indicated cell populations from lethally irradiated, thorax-protected CD45.1/CD45.2 IMDTR mice transplanted with a 1:1 mix of CD45.2 Ccr2−/− and CD45.1 Ccr2+/+ BM cells, injected with 50 ng DT i.p. 4 weeks later and evaluated at day 7 after DT. h, Representative contour plot of Ly6C and CD64 expression within lung single live AM-excluded CD45+F4/80+SSCloCD11b+ cells in CD45.1/CD45.2 IMDTR mice treated with 50 ng DT i.p., transferred with CD45.1 BM wild-type cMo i.v. 24 h after DT and evaluated at days 2 and 14 after DT. Plots are representative of 5 mice, each of them giving similar results. Data show the mean ± s.e.m. and are pooled from two independent experiments (c, e and g: n = 4–8, 4–8 and 6 mice per group, respectively). P values were calculated by likelihood ratio tests (b), two-way ANOVA with Tukey’s post hoc tests (c,e) or one-way ANOVA with Sidak’s post hoc tests (g). *P < 0.05; **P < 0.01; ***P < 0.001; ****P < 0.0001.

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