BALF cellularity is shown as (A) total number of the cells, (B) macrophages, (C) neutrophils, and (D) lymphocytes. Data are expressed as mean ± S.E.M. for n=7–10 per treatment group and are representative of two independent experiments. (E) Representative DiffQuik-stained cytospin preparations of BALF from sham- and CS-exposed mice treated with either vehicle or matrine (10 and 30 mg.kg⁻¹, intranasally). One-way ANOVA with Sidak post hoc test was performed to assess statistical significance. ****P<0.0001, ^##P<0.01, ^#P<0.05.