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Activation of group II metabotropic glutamate receptors blocks zinc release from hippocampal mossy fibers Biol. Res.
Matias,Carlos M; Dionísio,Jose C; Saggau,Peter; Quinta-Ferreira,Maria Emilia.
BACKGROUND: The hippocampal CA3 area contains large amounts of vesicular zinc in the mossy fiber terminals which is released during synaptic activity, depending on presynaptic calcium. Another characteristic of these synapses is the presynaptic localization of high concentrations of group II metabotropic glutamate receptors, specifically activated by DCG-IV. Previous work has shown that DCG-IV affects only mossy fiber-evoked responses but not the signals from associational-commissural afferents, blocking mossy fiber synaptic transmission. Since zinc is released from mossy fibers even for single stimuli and it is generally assumed to be co-released with glutamate, the aim of the work was to investigate the effect of DCG-IV on mossy fiber zinc signals....
Tipo: Journal article Palavras-chave: Zinc; Neurotransmission; Glutamatergic; Co-release; Metabotropic fluorescence; Inhibition.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100067
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