The K-Cl co-transporter KCC2 (SLC12A5) tunes the efficacy of GABA receptor-mediated transmission by regulating the intraneuronal chloride concentration [Cl]. KCC2 undergoes activity-dependent regulation in both physiological and pathological conditions. The regulation of KCC2 by synaptic excitation is well documented; however, whether the transporter is regulated by synaptic inhibition is unknown.
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