Fig. 1

HE staining of lung tissues in each group (200×, scale bar 50 μm). A: control group; B: histone group; C: histone + UFH group. D: Lung injury score in each group. Mean ± SD. n = 8. ^***P < 0.001, compared with control group; ^###P < 0. 001, compared with histone + UFH group