Fig 1: Impaired G-CSF-induced granulopoiesis in sepsis survivorsSham and CLP mice were administered PBS or G-CSF as in Figure 6.(A) Absolute number of neutrophils (CD11b+Ly6CloLy6G+) in the BM. (B) Frequencies of immature neutrophils (CD101−) and (C) mature neutrophils (CD101+) in the BM. Data represent the mean ± SD from two independent experiments, n = 3–9 mice per group analyzed via two-way ANOVA; ∗p < 0.05, ∗∗∗p < 0.001. (D) Frequencies of immature and mature neutrophils (CD101−/+) in the blood. (E) Representative flow cytometry plots showing the frequency of G-CSFR-positive blood neutrophils. (F) The percentage of G-CSFR+ neutrophils in peripheral blood. Data are pooled from two experiments with n = 3–6 mice/group; two-way ANOVA with Tukey’s multiple comparison test, and two-tailed unpaired Student’s t test for total neutrophils ##p < 0.01. Data represent the mean ± SD with n = 3–6 analyzed via one-way ANOVA, ∗p < 0.05. (G) Concentrations of SOCS3 in BM as determined by ELISA and normalized to total protein. Data represent the mean ± SD from two pooled experiment with n = 5–9 mice per group; analyzed via one-way ANOVA, ∗p < 0.05. (H) Model illustrating the impact of a mobilizing course of G-CSF injections on expansion and mobilization of HSPCs and emergency granulopoiesis sepsis survivors.
Fig 2: Dysfunctional hematopoietic response to G-CSF treatment post-sepsis(A) Diagram of CLP-induced sepsis and G-CSF administration beginning day 20 post-surgery. BM, spleen, and peripheral blood were harvested 1 h after final G-CSF administration.(B) Frequency of HSPCs in peripheral blood. Data represent the mean ± SD from a single experiment; n = 3–4.(C) The number of HSPCs in the BM. (D) The numbers of HSCs and MPPs in the BM in the indicated groups.(E) The number of HSPCs in the spleen.(F) The numbers of HSCs and MPPs in the spleen in the indicated groups. Data (C–F) represent the mean ± SD from three independent experiments, n = 6–12 mice per group analyzed via one-way ANOVA; ∗p < 0.05, ∗∗∗p < 0.001.(G–I) The number of CFU-C in the BM (G), blood (H), and spleen (I). CFU data are mean ± SD and represent data pooled from two independent experiments, n = 6–9; two-way ANOVA with Bonferroni’s multiple comparison test; ∗p < 0.05, ∗∗∗p < 0.001, ∗∗∗∗p < 0.0001.
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