ArticlePflugers Archiv : European journal of physiology2016
Functional coupling of TRPV4 channels and BK channels in regulating spontaneous contractions of the guinea pig urinary bladder.
Article in Pflugers Archiv : European journal of physiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed, 30 citations in OpenAlex.
- Ion Channels as Therapeutic Targets in Overactive Bladder: A Narrative Review of Mechanisms, Translational Evidence, and Current Gaps.Lower urinary tract symptoms · 2026Review
- Pharmacological Separation of Mechanosensory Mechanisms in Rat Urinary Bladder Ex Vivo.Pharmacology research & perspectives · 2026Article
- Endothelial TRPV4-Cx43 signalling complex regulates vasomotor tone in resistance arteries.The Journal of physiology · 2025Article
- Endothelial TRPV4/Cx43 Signaling Complex Regulates Vasomotor Tone in Resistance Arteries.bioRxiv : the preprint server for biology · 2024Article
- Low-Intensity Extracorporeal Shock Wave Therapy Ameliorates Detrusor Hyperactivity with Impaired Contractility via Transient Potential Vanilloid Channels: A Rat Model for Ovarian Hormone Deficiency.International journal of molecular sciences · 2024Article
- Drugs Currently Undergoing Preclinical or Clinical Trials for the Treatment of Overactive Bladder: A Review.Current therapeutic research, clinical and experimental · 2022Review
- Imatinib Mesylate Reduces Neurotrophic Factors and pERK and pAKT Expression in Urinary Bladder of Female Mice With Cyclophosphamide-Induced Cystitis.Frontiers in systems neuroscience · 2022Article
- Imatinib Mesylate Reduces Voiding Frequency in Female Mice With Acute Cyclophosphamide-Induced Cystitis.Frontiers in systems neuroscience · 2022Article
- Functional nitrergic innervation of smooth muscle structures in the mucosa of pig lower urinary tract.Cell and tissue research · 2021Article
- Alterations in detrusor contractility in rat model of bladder cancer.Scientific reports · 2020Article
- Urinary bladder smooth muscle ion channels: expression, function, and regulation in health and disease.American journal of physiology. Renal physiology · 2020Review
- TRPV4 receptor as a functional sensory molecule in bladder urothelium: Stretch-independent, tissue-specific actions and pathological implications.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2020Article
- TRP Channels as Lower Urinary Tract Sensory Targets.Medical sciences (Basel, Switzerland) · 2019Review
- Altered detrusor contractility and voiding patterns in mice lacking the mechanosensitive TREK-1 channel.BMC urology · 2019Article
- Cellular Mechanism Underlying Hydrogen Sulfide Mediated Epithelial KFrontiers in physiology · 2018Article
- The potassium channel KCa3.1 constitutes a pharmacological target for astrogliosis associated with ischemia stroke.Journal of neuroinflammation · 2017Article
Corrections and comments
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We investigated the role of TRPV4 channels (TRPV4) in regulating the contractility of detrusor smooth muscle (DSM) and muscularis mucosae (MM) of the urinary bladder. Distribution of TRPV4 in DSM and MM of guinea-pig bladders was examined by fluorescence immunohistochemistry. Changes in the contractility of DSM and MM bundles were measured using isometric tension recording. Intracellular Ca(2+) dynamics were visualized by Cal-520 fluorescent Ca(2+) imaging, while membrane potential changes were recorded using intracellular microelectrode technique. DSM and MM expressed TRPV4 immunoreactivity. GSK1016790A (GSK, 1 nM), a TRPV4 agonist, evoked a sustained contraction in both DSM and MM associated with a cessation of spontaneous phasic contractions in a manner sensitive to HC-067047 (10 μM), a TRPV4 antagonist. Iberiotoxin (100 nM) and paxilline (1 μM), large conductance Ca(2+)-activated K(+) (BK) channel blockers restored the spontaneous contractions in GSK. The sustained contractions in DSM and MM were reduced by nifedipine (10 μM), a blocker of L-type voltage-dependent Ca(2+) channels (LVDCCs) by about 40 % and by nominally Ca(2+)-free solution by some 90 %. GSK (1 nM) abolished spontaneous Ca(2+) transients, increased basal Ca(2+) levels and also prevented spontaneous action potential discharge associated with DSM membrane hyperpolarization. In conclusion, Ca(2+) influx through TRPV4 appears to activate BK channels to suppress spontaneous contractions and thus a functional coupling of TRPV4 with BK channels may act as a self-limiting mechanism for bladder contractility during its storage phase. Despite the membrane hyperpolarization in GSK, Ca(2+) entry mainly through TRPV4 develops the tonic contraction.
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