Serotonin receptor subtype 6 (5-HT6 receptor (also HTR6))

The serotonin receptor subtype 6 is a G protein-coupled receptor encoded by the HTR6 gene that binds serotonin (5-hydroxytryptamine). It is coupled primarily to Gs proteins and mediates excitatory neurotransmission via activation of adenylate cyclase. This receptor is expressed almost exclusively in the brain—particularly in regions involved with motor control, emotion, cognition, and memory such as the cerebral cortex, hippocampus, striatum, nucleus accumbens, caudate nucleus, olfactory tubercle and cerebellum. Antagonism or inverse agonism at this site has shown promise for improving cognitive deficits associated with neurodegenerative diseases like Alzheimer’s disease. Several investigational drugs targeting this site have reached clinical development for cognitive enhancement but none are yet approved specifically for this indication[1][3][8][9].

Other names

5-HT6 receptorHTR6Serotonin 5-hydroxytryptamine receptor 6

Drugs targeting the serotonin receptor subtype 6 typically act as antagonists or inverse agonists. These agents block or reduce constitutive activity of the receptor to enhance cognitive function and potentially treat memory impairment in neuropsychiatric disorders[3][8][9].