Effect of thearubigin treatment on pulmonary histopathology. a PBS-treated healthy control group, b LPS-induced ALI group, c vehicle-treated ALI group, d 10 mg/kg thearubigin-treated ALI group, e 20 mg/kg thearubigin-treated ALI group, and f 40 mg/kg thearubigin-treated ALI group. ALI acute lung injury, LPS lipopolysaccharide. Scale bar indicates 20 μm