Environmental toxicology and pharmacology · 2018
Role of voltage-gated calcium channels on striatal dopamine release induced by inorganic mercury in freely moving rats.
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Faro Lilian R Ferreira, Alfonso Miguel, Ferreira Vania Moraes, Durán Rafael
Аннотация
The possible role of voltage-sensitive calcium channels (VSCC) activation on the HgCl2-induced dopamine release was investigated using selective VSCC blockers and the dopamine levels were measured by HPLC from samples obtained by in vivo brain microdialysis. Infusion of HgCl2 in nicardipine (10 or 100 μM) or flunaricine (10 μM) pretreated animals had no significant effect on dopamine release induced by HgCl2. Pretreatment with 100 μM flunaricine, 20 μM ω-conotoxin MVIIC, or ω-conotoxin GVIA significantly decreased the HgCl2-induced dopamine release over 61%, 88%, and 99%, respectively. HgCl2-induced dopamine release could be produced, at least in part, by activation of VSCC at dopaminergic terminals, especially N- and P/Q-type.