NaHS inhibits the expression of Fas/FasL induced by hemorrhagic shock in rat lungs. (A–E) IHC staining of Fas in rat lungs, the black arrows indicate cells stained positively for Fas; (F–J) IHC staining of FasL in rat lungs, the black arrows indicate cells stained positively for FasL. Original magnification ×40. Scale bars=20 μm. cP<0.01 vs the Sham and Sham+NaHS groups. fP<0.01 vs the HS group. (A, F) Sham group; (B, G) Sham+NaHS group; (C, H) HS group; (D, I) HS+NaHS group.