U-99194 maleate is a potent and selective antagonist of the dopamine D3 receptor, exhibiting a Ki value of 160 nM. This compound effectively inhibits both endogenously released dopamine and exogenous D3 agonist activation of the D3 receptor. In rat hippocampal slices, U-99194 maleate reverses the IPSC-suppressive effect induced by the D3 agonist PD 128907. Additionally, it demonstrates significant suppression of nicotine-induced tremors in mouse models, making it a valuable tool for investigating dopamine D3 receptor-mediated motor disorders, particularly in the context of kinetic tremors.
U-99194 maleate is a potent and selective antagonist of the dopamine D3 receptor, exhibiting a Ki value of 160 nM. This compound effectively inhibits both endogenously released dopamine and exogenous D3 agonist activation of the D3 receptor. In rat hippocampal slices, U-99194 maleate reverses the IPSC-suppressive effect induced by the D3 agonist PD 128907. Additionally, it demonstrates significant suppression of nicotine-induced tremors in mouse models, making it a valuable tool for investigating dopamine D3 receptor-mediated motor disorders, particularly in the context of kinetic tremors.
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