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Psychostimulants induce neuroadaptations in excitatory and fast inhibitory transmission in the ventral tegmental area (VTA). Mechanisms underlying drug-evoked synaptic plasticity of slow inhibitory transmission mediated by GABA B receptors and G protein-gated inwardly rectifying potassium (GIRK/Kir 3 ) channels, however, are poorly understood. Here, we show that 1 day after methamphetamine...
GABA B receptors are heterodimeric G protein-coupled receptors composed of R1 and R2 subunits that mediate slow synaptic inhibition in the brain by activating inwardly rectifying K + channels (GIRKs) and inhibiting Ca 2+ channels. We demonstrate here that GABA B receptors are intimately associated with 5′AMP-dependent protein kinase (AMPK). AMPK acts as a metabolic...
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