PMID- 27659399 OWN - NLM STAT- MEDLINE DCOM- 20170822 LR - 20180309 IS - 1872-7484 (Electronic) IS - 1566-0702 (Linking) VI - 201 DP - 2016 Dec TI - Adrenergic signaling elements in the bladder wall of the adult rat. PG - 40-48 LID - S1566-0702(16)30180-1 [pii] LID - 10.1016/j.autneu.2016.09.002 [doi] AB - A growing body of work is describing the absence of a significant sympathetic innervation of the detrusor implying little sympathetic regulation of bladder contractility. However, low doses of adrenergic agonists are capable of relaxing the bladder smooth muscle. If these effects underpin a physiological response then the cellular nature and operation of this system are currently unknown. The present immunohistochemistry study was done to explore the existence of alternative adrenergic signaling elements in the rat bladder wall. Using antibodies to tyrosine hydroxylase (TH) and vesicular mono-amine transporter (vmat), few adrenergic nerves were found in the detrusor although TH immunoreactive (IR) nerves were apparent in the bladder neck. TH-IR and vmat-IR nerves were however abundant surrounding blood vessels. A population of vmat-IR cells was found within the network of interstitial cells that surround the detrusor muscle bundles. These vmat-IR cells were not or only weakly TH-IR. This suggests that these interstitial cells have the capacity to store and release catecholamines that may involve noradrenaline. Cells expressing the beta(1)-adrenoceptor (beta(1)AR-IR) were also detected within the interstitial cell network. Double staining with antibodies to beta(1)AR and vmat suggests that the majority of vmat-IR interstitial cells show beta(1)AR-IR indicative of an autocrine signaling system. In conclusion, a population of interstitial cells has the machinery to store, release and respond to catecholamines. Thus, there might exist a non-neuronal beta-adrenergic system operating in the bladder wall possibly linked to one component of motor activity, micro-contractions, a system that may be involved in mechanisms underpinning bladder sensation. CI - Copyright (c) 2016 Elsevier B.V. All rights reserved. FAU - Persyn, Sara AU - Persyn S AD - Department of Urology, Antwerp University Hospital and University of Antwerp, Faculty of Medicine, Antwerp, Belgium. Electronic address: sarapersyn@hotmail.com. FAU - Eastham, Jane AU - Eastham J AD - Uro-physiology Research Group, The Dental and Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, England. Electronic address: j.e.eastham@newcastle.ac.uk. FAU - De Wachter, Stefan AU - De Wachter S AD - Department of Urology, Antwerp University Hospital and University of Antwerp, Faculty of Medicine, Antwerp, Belgium. Electronic address: stefan.dewachter@uantwerpen.be. FAU - Gillespie, James AU - Gillespie J AD - Department of Urology, Antwerp University Hospital and University of Antwerp, Faculty of Medicine, Antwerp, Belgium. Electronic address: james.gillespie@uantwerpen.be. LA - eng PT - Journal Article DEP - 20160910 PL - Netherlands TA - Auton Neurosci JT - Autonomic neuroscience : basic & clinical JID - 100909359 RN - 0 (Catecholamines) RN - 0 (Receptors, Adrenergic, beta) RN - 0 (Vesicular Monoamine Transport Proteins) RN - EC 1.14.16.2 (Tyrosine 3-Monooxygenase) SB - IM MH - Animals MH - Catecholamines/*metabolism MH - Female MH - Immunohistochemistry MH - Microscopy, Fluorescence MH - Rats, Wistar MH - Receptors, Adrenergic, beta/metabolism MH - Tyrosine 3-Monooxygenase/metabolism MH - Urinary Bladder/blood supply/cytology/innervation/*metabolism MH - Vesicular Monoamine Transport Proteins/metabolism OTO - NOTNLM OT - Catecholamines OT - Interstitial cells OT - Rat OT - Urinary bladder OT - beta-Adrenoceptors EDAT- 2016/09/24 06:00 MHDA- 2017/08/23 06:00 CRDT- 2016/09/24 06:00 PHST- 2016/05/08 00:00 [received] PHST- 2016/09/04 00:00 [revised] PHST- 2016/09/09 00:00 [accepted] PHST- 2016/09/24 06:00 [pubmed] PHST- 2017/08/23 06:00 [medline] PHST- 2016/09/24 06:00 [entrez] AID - S1566-0702(16)30180-1 [pii] AID - 10.1016/j.autneu.2016.09.002 [doi] PST - ppublish SO - Auton Neurosci. 2016 Dec;201:40-48. doi: 10.1016/j.autneu.2016.09.002. Epub 2016 Sep 10.