(A) Fluorescence of FITC-BSA was measured in BALf samples from 4 animal groups: control, lung injury (LI), lung injury followed by TAT-SNAP-23 (LI + TAT-SNAP-23), or lung injury followed by TAT-Control (LI + TAT-Control). Data were expressed as mean relative fluorescent units ± SEM, n= 6 animals per group. (B) Total protein was measured in BALf samples from 3 animal groups: lung injury (LI), lung injury followed by TAT-SNAP-23 (LI + TAT-SNAP-23), or lung injury followed by TAT-Control (LI + TAT-Control). Data were expressed as mean ± SEM, n= 4 animals per group. (C) Hematoxilin & Eosin (H&E) staining was performed on lung sections from 4 animal groups: control, lung injury, lung injury followed by TAT-SNAP-23, or lung injury followed by TAT-Control; original magnification 10 × and 100 ×. (D) Immunohistochemistry for myeloperoxidase (MPO) was performed on lung sections from lung injured animals, and lung injured treated with TAT-SNAP-23; original magnification 40 × and 100 ×.