Figure 1

Total cell number in BAL. Quantification of BAL total cell number at D8 (A, C) and D21 (B, D) post elastase treatment, in presence of 100 μg (A, B) or 500 μg NPs (C, D). S, saline; E, elastase; BSA, bovine serum albumin. CB, carbon black. TiO₂, titanium dioxide. *: p < 0.05 vs S-BSA. n = 6. Box plots show median and interquartile range (25^th and 75^th percentiles).