γ-Acetylenic GABA, also known as 4-aminohex-5-ynoic acid is a potent and irreversible inhibitor of GABA-T.[3]
Like other GABA-T inhibitors, γ-acetylenic GABA causes GABA levels in the brain to be elevated. This is due to 4-aminobutyrate transaminase being the enzyme that converts γ-aminobutyric acid to L-glutamate. Inhibiting the enzyme stops this conversion from happening.
Continuous administration of γ-acetylenic GABA on rats during four days was able to reduce or completely stop seizures that were induced by amygdala overstimulation.[4]
A study has showed that γ-acetylenic GABA could reduce tardive dyskinesia symptoms. This result mostly happened in subjects receiving higher doses.[5]
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