Emapunil (AC-5216 XBD-173) is an anxiolytic drug which acts as a selective agonist at the peripheral benzodiazepine receptor also known as the mitochondrial 18 kDa translocator protein or TSPO. This protein has multiple functions among which is regulation of steroidogenesis particularly the production of neuroactive steroids such as allopregnanolone in the brain.
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