Dopamine release evoked by beta scorpion toxin, tityus gamma, in prefrontal cortical slices is mediated by intracellular calcium stores.

1. We have investigated the effect of tityus gamma (TiTX γ) scorpion toxin on the release of [3H] dopamine in rat brain prefrontal cortical slices. The stimulatory effect of TiTX γ on the release of [3H]dopamine was dose/time-dependent with an EC50 of 0.01μM.