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Dexmedetomidine promotes the hypoxia-induced viability of cancer cell lines. (A) Viability of A549 cells in group N, group H, group HD and group HDA. (B) The viability of HCT116 cells in group N, group H, group HD and group HDA. The proliferation rate of the cells was determined by MTT assay. *P<0.05 vs. N; #P<0.05 vs. H; +P<0.05 vs. HD; n=6 in each group. H, hypoxia; HD, hypoxia + dexmedetomidine; HDA, hypoxia + dexmedetomidine + atipamezole; N, normoxia; OD, optical density.
