Abstract
Lamotrigine (LTG), an anticonvulsive drug, was tested for its effects on striatal content of DA and its metabolites, DOPAC and HVA, in audiogenic seizure-resistant (ER) and audiogenic seizure-prone (EP) lines of Balb/c mice. A single dose of LTG (20 mg/kg) prevented audiogenic seizures in seizure-prone mice, while reducing substantially the striatal content of the DA metabolite, DOPAC (to less than 50% of saline-injected controls) in both seizure-resistant and seizure-prone mice. LTG administration also resulted in significant reduction of striatal content of HVA. The in situ activity of tyrosine hydroxylase (TH) in extracts of striatum was significantly reduced by LTG administration in both ER and EP mice. These data show that DA synthesis in the striatum of mice is substantially reduced by LTG administration.
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