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IL-6 and CD31 expression levels after IRI injury. Quantitative RT-PCR evaluation of renal expression of IL-6 (A) and CD31 (B) after ischemia-reperfusion with or without opioid preconditioning. HPRT was used as a housekeeping gene for normalization. Sham group is represented by the white bars, IRI by the black bars, IRI + morphine by the dark gray bars and IRI + fentanyl by the light gray bars. Values are means ± S.E.M. (n = 6). * p < 0.05 vs. IRI.
