Mitochondrial reactive oxygen species regulate the strength of inhibitory GABA-mediated synaptic transmission.

ABSTRACT: Neuronal communication imposes a heavy metabolic burden in maintaining ionic gradients essential for action potential firing and synaptic signalling. Although cellular metabolism is known to regulate excitatory neurotransmission, it is still unclear whether the brain's energy supply affects inhibitory signalling. Here we show that mitochondrial-derived reactive oxygen species (mROS) regulate the strength of postsynaptic GABA(A) receptors at inhibitory synapses of cerebellar stellate cells. Inhibition is strengthened through a mechanism that selectively recruits α3-containing GABA(A) receptors into synapses with no discernible effect on resident α1-containing receptors. Since mROS promotes the emergence of postsynaptic events with unique kinetic properties, we conclude that newly recruited

SUBMITTER: Accardi MV 

PROVIDER: S-EPMC4977183 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature