Figure 4.

(A) Albumin concentration in BAL fluids of WT and PAI-1^−/− mice at 4 weeks after irradiation and non-irradiated age-matched control mice. Data are shown as mean ± SEM for 4–6 mice per group. *P<0.05, **P<0.01 as indicated. (B) Histological analyses using hematoxylin and eosin staining in sections of irradiated lung at 4 weeks after irradiation. Magnification: ×200. Scale bar=100 µm. Arrows show the areas of inflammatory cell infiltration. WT, wild-type; NS, not significant; PAI-1, plasminogen activator inhibitor-1; BAL, bronchoalveolar lavage.