Alpha-2B and Alpha-2C adrenergic receptors (ADRA2B/ADRA2C)

The Alpha-2B and Alpha-2C adrenergic receptors are subtypes of the alpha-2 adrenergic receptor family, which are G protein-coupled receptors (GPCRs) primarily coupled to the Gi/o signaling pathway [1, 2]. These receptors are widely distributed in the central and peripheral nervous systems, where they function as presynaptic autoreceptors and heteroreceptors to inhibit the release of neurotransmitters such as norepinephrine, dopamine, and acetylcholine [6, 7, 11]. The alpha-2B subtype is specifically involved in mediating peripheral vasoconstriction and has been implicated in developmental and reproductive processes [5, 9, 10]. In contrast, the alpha-2C subtype plays a critical role in modulating neurotransmission during states of low nerve activity and is heavily involved in mood regulation, stress response, and cognitive functions [3, 7, 12]. Dysregulation or genetic polymorphisms of these receptors are linked}

Other names

Alpha-2B adrenoceptorAlpha-2C adrenoceptorADRA2BADRA2CAlpha-2B/2C adrenergic receptor subtypesAlpha-2BARAlpha-2CAR

Agonism of these receptors leads to Gi/o protein-mediated inhibition of adenylate cyclase, reduction of cAMP levels, and modulation of ion channels, resulting in decreased neurotransmitter release and altered vascular tone [3, 4, 10, 11]. Antagonism blocks these inhibitory effects, thereby increasing neurotransmitter release and potentially improving cognitive or mood-related symptoms [7, 8].