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The effects of opioids in HUVEC apoptotic proteins. Western blot (A) and quantification of band intensity (B) of Bax and Bcl-2 in HUVEC after 24 h treatment of morphine and fentanyl. Morphine (C) and fentanyl (D) at 1, 10 and 100 μM significantly decreases Annexin V percentage in HUVEC. Each experiment was repeated three times in triplicate, and each value indicates mean ± SD. *p < 0.05, compared to control
