Figure 5: Effects of Ad-siTLR4 on LPS-induced ALI. Lungs were collected at 4 h after injection of normal saline or LPS for histological examination (a, b, c). Sections were stained with hematoxylin-eosin. Magnification: ×100 Wet/Dry ratio (d), total protein content in BALF (e) as well as MPO activity (f) were measured to determine the lung edema, microvascular permeability, and neutrophil sequestration, respectively. versus Ad-EGFP group, versus control group.