Journal: Inflammation
Article Title: Programmed death-ligand 1 (PD-L1) Modulates Chemokine Production Via the TLR4/TRAF6 Signaling Axis During LPS + IFN-γ-Induced Endotoxemia-mimicked Sepsis
doi: 10.1007/s10753-025-02394-2
Figure Lengend Snippet: PD-L1 knockout attenuates septic mouse mortality and suppresses CCL8 and CXCL9 expression. ( A – C ) PD-L1 WT /mice and PD-L1 KO /mice were intraperitoneally injected with LPS (15 mg/kg) and IFN-γ (10 µg/kg) to induce endotoxemia-induced sepsis. ( B ) The survival rate was determined over a 60-hour observation period and is presented as a Kaplan‒Meier survival curve ( n = 15 mice per group). The results are presented as Kaplan–Meier survival curves. The results of the statistical analysis were analyzed with the log-rank test. * p < 0.05. ( C ) Peripheral blood was collected 12 h posttreatment for serum isolation and PBMC separation. CCL8 and CXCL9 protein levels in serum and their corresponding mRNA levels in PBMCs were subsequently analyzed ( n = 3 independent biological replicates). ( D ) Peritoneal macrophages (PMs) were extracted from PD-L1 wild-type and knockout mice and then treated with LPS (100 ng/mL) + IFN-γ (20 ng/mL) for 12 h. The cells were harvested for CCL8 and CXCL9 mRNA and protein detection by qRT‒PCR and ELISAs ( n = 3 independent biological replicates). (E) Peripheral blood monocytes were extracted from PD-L1 wild-type and knockout mice and then treated with LPS + IFN-γ for 12 h. The cells were harvested for CCL8 and CXCL9 mRNA and protein detection by qRT‒PCR and ELISAs ( n = 3 independent biological replicates). The data are presented as the mean ± SEM. Statistical analysis for C was performed by Student’s t test, and that for D and E was performed by one-way ANOVA with LSD test for post hoc analyses. * p < 0.05
Article Snippet: Monocytes were isolated with a Solarbio peripheral blood monocyte isolation reagent kit (Beijing, China).
Techniques: Knock-Out, Expressing, Injection, Isolation