Inhibitory effects of sodium valproate on oxidative phosphorylation.
Sodium valproate (VP) inhibited oxidative phosphorylation in isolated rat liver mitochondria. State 3 rates of oxygen consumption with glutamate as substrate were 80% of control values at a low VP concentration (24 microM). At 240 microM, there was more than 50% inhibition of glutamate and alpha-ketoglutarate state 3 rates. Succinate state 3 rates were 80% of control values, and uncoupling was noted at 2400 microM VP. These VP effects were similar to those of propionate and isovalerate, suggesting a common mechanism of toxicity. Inhibition of mitochondrial oxidative phosphorylation may explain why VP intoxication causes a hepatocerebral disorder that resembles Reye syndrome.[1]References
- Inhibitory effects of sodium valproate on oxidative phosphorylation. Haas, R., Stumpf, D.A., Parks, J.K., Eguren, L. Neurology (1981) [Pubmed]
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