SLC6A1 and Hyperammonemia: We analyzed the effects of hyperammonemia on the content of the cerebellar slices of GABA-synthesizing enzymes GAD65 and GAD67, and on the concentration of GABA itself, on the membrane expression of GABA transporters GAT1 and GAT3, and of GABAA receptor subunits α2, β3, and γ2.