Figure 2. No difference in acute rejection grades between lung grafts of KO vs.

WT mice. (A and C) Low magnification H&E images. (B and D) Enlarged images from selected areas. Acute rejection was graded based on ISHLT criteria in n = 9 WT recipients and n = 10 KO recipients (lungs from 3 KO recipients had such extensive fibrosis that acute rejection was not gradable). (E) No significant difference in acute rejections scores. (F) No significant difference in airway (B-grade) inflammation scores.