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BDNF level in the rat dorsal hippocampus. The BDL group had a lower dorsal hippocampus BDNF level than the control groups. The BDLM group had higher dorsal hippocampus BDNF than the control groups, indicating the effectiveness of melatonin. *P<0.05 versus the SHAM group; #P<0.05 versus BDL. BDL, bile duct ligation; BDLM, bile duct ligation treated with melatonin; BDNF, brain-derived neurotrophic factor; SHAM, sham control; SHAMM, sham control treated with melatonin.
