Fig. 5.
Histological and flow cytometric analysis of pulmonary lymphocytes in Smad3–/– mice. (a) Lungs were harvested from B6 and Smad3–/– mice at 24 h after treated with interleukin (IL)-18/IL-2 for 3 days. Lung tissues were stained with haematoxylin and eosin. Original magnification: ×100. (b) Pulmonary lymphocytes were harvested from B6 and Smad3–/– mice at 24 h after treatment with IL-18/IL-2 for 3 days, as described in Materials and methods. Pulmonary lymphocytes were stained with phycoerythin (PE)-conjugated anti-natural killer (NK)1·1 and PE/cyanine 7 (Cy7)-conjugated anti-CD3ε monoclonal antibodies. (c) Proportion of NK cells relative to pulmonary lymphocytes in B6 and Smad3–/– mice treated with IL-18/IL-2. Data are mean ± standard error of the mean of three mice per group. *P < 0·05; Student's t-test.