Urothelial nerve endings

Urothelial nerve endings comprise a dense network of sensory afferent and autonomic nerve fibers located within and beneath the urothelial lining of the urinary bladder. These nerve endings serve as a critical interface for the micturition reflex, utilizing various molecular receptors such as TRPV1, P2X3, and muscarinic receptors to sense bladder stretch and chemical composition (Birder & Andersson, 2013, PubMed: 23297184). In clinical practice, these structures are targeted to treat disorders like overactive bladder and interstitial cystitis, where nerve hypersensitivity or increased fiber density contributes to symptoms of urgency and pain (Fowler et al., 2008, PubMed: 18490916). For example, OnabotulinumtoxinA is utilized to inhibit the release of excitatory neurotransmitters from these terminals, while vanilloids like resiniferatoxin are used to desensitize nociceptive fibers (Apostolidis et al., 2008, PubMed: 18230006). Despite their therapeutic importance, urothelial nerve endings are classified as an anatomical structure or tissue site rather than a discrete molecular target like a single protein or enzyme.

Other names

Suburothelial nerve plexusIntraurothelial nerve fibersNerve endings in urotheliumBladder afferent nerve endings

Inhibition of neurotransmitter exocytosis (via SNAP-25 cleavage) and desensitization of afferent sensory signaling pathways.