Table 2. Tumor necrosis factor-alpha and transforming growth factor beta 1 levels in bronchoalveolar lavage fluid.

	Control	Early  bleomycin+saline	Early bleomycin+montelukast	Late  bleomycin+saline	Late bleomycin+montelukast
	Mean±SD	Mean±SD	Mean±SD	Mean±SD	Mean±SD
TNF-a(pg/mL)	4.0±1.4	44.1±14.5*†	11.8±4.7§	30.3±5.7*	14.3±4.1¶
TGF-b1 (pg/mL)	28.6±6.6	82.3±14.1*‡	32.0±5.8§	60.1±2.9*	34.8±3.8§
TNF-a: Tumor necrosis factor-alpha; TGF-b1: Transforming growth factor beta 1; * p<0.001 vs. control; ¶ p<0.01; § p<0.001 vs. B+saline groups in same term; † p<0.05 vs. late bleomycin + saline group; ‡ p<0.001 vs. late bleomycin + saline group. Data are means ± standard deviations from eight rats for each group.