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qPCR analysis of occludin a, occludin b, il1b, oprm1, oprd1, drd2a, htr2aa, bdnf, and ntrk2 expression in zebrafish. (n = 3). ∗P < 0.05, ∗∗P < 0.01 vs the C group; #P < 0.05, ##P < 0.01 vs the M group. C, control group; M, morphine group; M+S, morphine+sinomenine group.
