γ-Aminobutyric acid (GABA) is the major inhibitory neurotransmitter in the mammalian central nervous system. GABA is metabolized by the successive action of GABA transaminase (GABA-T) and succinic semialdehyde dehydrogenase (SSADH), to succinic acid, which is a substrate for the tricarboxylic acid cycle. An increase in the brain GABA concentration can enhance the inhibitory function of GABAergic system and have therapeutic applications in neurological disorders including epilepsy, Parkinson’s dise...