Document Detail

The Mechanoreceptor TRPV4 is Localized in Adherence Junctions of the Human Bladder Urothelium: A Morphological Study.
MedLine Citation:
PMID:  21784462     Owner:  NLM     Status:  Publisher    
PURPOSE: TRPV4 (transient receptor potential vanilloid 4 channel) is a nonselective cation channel involved in different sensory functions that was recently implicated in bladder mechanosensation. We investigated the cellular site of TRPV4 in bladder urothelium and explored a molecular connection between TRPV4 and urothelial adherence junctions. MATERIALS AND METHODS: We obtained healthy tissues sections from cystectomy in humans due to cancer in 3 and noncancerous conditions in 2. Besides human biopsies tissues from 7 normal and 7 TRPV4-/-mice, and the urothelial cell line RT4 were also used. Experiments were done with polyclonal antibody against TRPV4 (against the N-terminus of rat TRPV4). A molecular connection between TRPV4 and different adherence junction components was investigated using immunofluorescence, Western blot and immunoprecipitation. RESULTS: Results revealed TRPV4 on urothelial cell membranes near adherence junctions. Results were comparable in the urothelial cell line, human bladders and mouse bladders. Subsequent immunoprecipitation experiments established a molecular connection of TRPV4 to α-catenin, an integral part of the adherence junction that catenates E-cadherin to the actin-microfilament network. CONCLUSIONS: Results provide evidence for the location of TRPV4 in human bladder urothelium. TRPV4 is molecularly connected to adherence junctions on the urothelial cell membrane. TRPV4 coupling to a rigid intracellular and intercellular structural network would agree with the hypothesis that TRPV4 can be activated by bladder stretch.
Dick A W Janssen; Joost G Hoenderop; Kees C F J Jansen; Annemiete W Kemp; John P F A Heesakkers; Jack A Schalken
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-7-22
Journal Detail:
Title:  The Journal of urology     Volume:  -     ISSN:  1527-3792     ISO Abbreviation:  -     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-7-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376374     Medline TA:  J Urol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 American Urological Association Education and Research, Inc. Published by Elsevier Inc. All rights reserved.
Departments of Urology and Physiology (JGH, AWK), Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Stimulation of Soluble Guanylate Cyclase Improves Renal Recovery After Relief of Unilateral Ureteral...
Next Document:  Oxalate Impairs Aminophospholipid Translocase Activity in Renal Epithelial Cells Via Oxidative Stres...