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Effect of long-term in vivo treatment with imipramine on the oxidative energy metabolism in rat brain mitochondria.

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  • 1Department of Biochemistry, M.S. University of Baroda, India.


The effects of long-term administration of the tricyclic antidepressant imipramine on energy metabolism of rat brain mitochondria were examined. Intraperitoneal administration of the drug resulted in significant stimulation of the state 3 respiration rates with glutamate, pyruvate+malate, beta-hydroxybutyrate and succinate as the substrates. The effect was evident within a week of imipramine administration and was sustained through the second week of the drug treatment. State 4 respiration rates were also found to be increased in general. However, the respiration with ascorbate+TMPD as the electron donor system decreased. The intramitochondrial content of cytochrome b and c+c1 increased in the first week of the drug treatment; that of aa3 cytochrome increased only in the second week.

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