Neuronal porosome

The neuronal porosome is a 15 nm cup-shaped supramolecular lipoprotein structure located at the presynaptic plasma membrane of neurons [5, 10]. It serves as the universal secretory portal where synaptic vesicles transiently dock and fuse to release neurotransmitters into the synaptic cleft via a "kiss-and-run" mechanism [10, 12]. The complex is composed of approximately 30-40 proteins, including SNAREs (such as SNAP-25 and Syntaxin-1A), ion channels (like P/Q-type calcium channels), and motor proteins that regulate the opening and closing of the fusion pore [5, 13]. In neurodegenerative conditions like Alzheimer's disease, the porosome is disrupted by toxic beta-amyloid (1-42) and the depletion of essential components, leading to synaptic failure and impaired neurotransmission [1, 11]. Therapeutic approaches being developed by companies like Porosome Therapeutics involve the reconstitution of functional wild-type porosomes into diseased neurons or the use of AI-designed decoy peptides to protect the complex from amyloid-induced damage [1, 6, 8]. These strategies aim to restore both the secretory and metabolic integrity of the neuron to reverse disease pathology [2, 9].

Other names

Secretory portalSecretory nanomachinePresynaptic porosomeSynaptic porosomeNeuronal porosome complex

Restoration of the neuronal secretory machinery through porosome reconstitution and metabolic reprogramming, combined with the neutralization of toxic beta-amyloid to prevent disruption of porosome protein-protein interactions [1, 2, 11].