Figure 2.

Microscopic analysis of pulmonary injury induced by chronic exposure of MA. A, MA‐induced pulmonary injury by H&E staining (Olympus BX 51, Japan, ×200): infiltration by inflammatory cells in the MA group, more compact lung parenchyma, thickened alveolar septum, alveoli fusion and reduced number of alveolar sacs in the MA group. B, The thickness of alveolar septum (μm) in different groups. C, The number of alveolar sacs in different groups. The quantification of Figure 2B,C was analysed in three visual fields randomly selected in each section, respectively. Data were shown as means ± SD, ***P < .01 vs Control; Control, Control group; MA, methamphetamine group