Figure 2
From: The role of pro- and anti-inflammatory responses in silica-induced lung fibrosis
Hydroxyproline and type 1 collagen contents in lung homogenates of SD rats (A-B) and NMRI mice (C-D) 60 days after intratracheal instillation of saline or silica particles (2.5 or 25 mg/ g lung). Bars represent means +/- SEM of 5 to 7 animals. Significant differences between treated animals and controls: *P < 0.05, **P < 0.01, ***P < 0.001 (Student-Newman-Keuls multiple comparison test).