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In traditional Chinese medicine, the flower of Pueraria lobata (Puerariae Flos) has been used in therapy to counteract the problems associated with alcohol drinking and liver injury. In this study, we investigated the hepatoprotective effects and its mechanisms of tectoridin, an isoflavone glycoside from the flower of P. lobata (Willd.) Ohwi. Ethanol (5g/kg) was given orally every 12h for a total of three doses. 1h after the last dose of ethanol, tectoridin (25, 50 and 100mg/kg) was given intragastrically five times in three consecutive days. The mice were sacrificed at 4h after tectoridin treatment. Peroxisome proliferators-activated receptor α (PPARα), sterol regulatory element-binding protein (SREBP)-1c and their target genes were evaluated by biochemical analysis and quantitative real-time polymerase chain reaction (qPCR). Mitochondria were isolated for the mitochondrial permeability transition (MPT) and membrane …