Alterations in IL-6, TNF-α, CRP, NO, eNOS and iNOS in rat endotheliocytes prior to and following CIH induction. (A) Rat endotheliocytes (original magnification, ×100). (B) Protein levels of IL-6, TNF-α, CRP, eNOS and iNOS in rat endotheliocytes prior to and following CIH induction, ssessed by western blotting. (C) Rat endotheliocytes IL-6. (D) Rat endotheliocytes TNF-α. (E) Rat endotheliocytes CRP. (F) Rat endotheliocytes NO. (G) Rat endotheliocytes eNOS. (H) Rat endotheliocytes iNOS. *P<0.05 vs. control; #P<0.05 vs. CIH-0 h; ΔP<0.05 vs. CIH-1; □P<0.05 vs. CIH-2 h. CIH, chronic intermittent hypoxia; IL-6, interleukin-6; TNF-α, tumor necrosis factor-α; CRP, C-reactive protein; NO, nitric oxide; eNOS, endothelial nitric oxide synthase; iNOS, inducible nitric oxide synthase.