Fig. 4

Incubation with l-carnitine and baicalin did not affect hyperoxia-induced proliferation in cultured lung endothelial cells. Cells were exposed to hyperoxia (50% O₂/5% CO₂, 95% O₂/5% CO₂) or air (21% O₂/5% CO₂) for 24 h followed by normoxia for 24 h. Cells were incubated with l-carnitine (LCT, 40 and 80 mg/L) and baicalin (BLN, 22.5 and 45 mg/L) for 12 h during the air recovery phase. EdU incorporation was measured by flow cytometry, and a percentage of EdU positive cells was calculated. N = 6–7. *P < 0.05, **P < 0.01 vs air using one-way ANOVA followed by Tukey’s multiple comparison test