Figure 1From: Leaky lysosomes in lung transplant macrophages: azithromycin prevents oxidative damage(A) Lysosomal membrane permeabilization (LMP) and (B) cell death (apoptosis, necrosis and total cell death) in cultures of oxidatively stressed human lung macrophages that were retrieved from healthy subjects (n = 7), lung transplant recipients without azithromycin (n = 5) and with azithromycin treatment (AZM; 250 mg three times per week) (n = 3). LMP was assessed by cytosolic/nuclear green fluorescence due to acridine orange leakage into the cytosol (arbitrary units; A.U.) in non-oxidatively stressed lung macrophages (open symbols) and oxidatively stressed lung macrophages immediately after a 1-h oxidant exposure (filled symbols). Cell death, which appeared 10 h after the end of oxidant challenge, was assessed by typical morphology using a phase contrast microscope and by the fraction of apoptotic DNA (both methods gave similar results for apoptosis). In the non-oxidatively stressed cultures, cell death was < 3%. For details, see the Methods section. Values are the means ± 1 SD. Significant differences are indicated as follows: * p < 0.05 and ** p < 0.01, # p < 0.05 and ## p < 0.01 (vs. healthy subjects), § p < 0.05 and §§ p < 0.01 (vs. transplant recipients without AZM).Back to article page