NDLI: Increased TRPV4 Expression in Urinary Bladder and Lumbosacral Dorsal Root Ganglia in Mice with Chronic Overexpression of NGF in Urothelium

Content Provider	Springer Nature Link
Author	Girard, Beatrice M. Merrill, Liana Malley, Susan Vizzard, Margaret A.
Copyright Year	2013
Abstract	Transient receptor potential vanilloid (TRPV) family member 4 (TRPV4) expression has been demonstrated in urothelial cells and dorsal root ganglion (DRG) neurons, and roles in normal micturition reflexes as well as micturition dysfunction have been suggested. TRP channel expression and function is dependent upon target tissue expression of growth factors. These studies expand upon the target tissue dependence of TRPV4 expression in the urinary bladder and lumbosacral DRG using a recently characterized transgenic mouse model with chronic overexpression of nerve growth factor (NGF-OE) in the urothelium. Immunohistochemistry with image analyses, real-time quantitative polymerase chain reaction, and Western blotting were used to determine TRPV4 protein and transcript expression in the urinary bladder (urothelium + suburothelium, detrusor) and lumbosacral DRG from littermate wild-type (WT) and NGF-OE mice. Antibody specificity controls were performed in TRPV4$^{−/−}$ mice. TRPV4 transcript and protein expression was significantly (p ≤ 0.001) increased in the urothelium + suburothelium and suburothelial nerve plexus of the urinary bladder and in small- and medium-sized lumbosacral (L1, L2, L6-S1) DRG cells from NGF-OE mice compared to littermate WT mice. NGF-OE mice exhibit significant (p ≤ 0.001) increases in NGF transcript and protein in the urothelium + suburothelium and lumbosacral DRG. These studies demonstrate regulation of TRPV4 expression by NGF in lower urinary tract tissues. Ongoing studies are characterizing the functional roles of TRPV4 expression in the sensory limb (DRG, urothelium) of the micturition reflex.
Starting Page	602
Ending Page	614
Page Count	13
File Format	PDF
ISSN	08958696
Journal	Journal of Molecular Neuroscience
Volume Number	51
Issue Number	2
e-ISSN	15591166
Language	English
Publisher	Springer US
Publisher Date	2013-05-21
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Micturition Sensory transducer Growth factor Q-PCR Western blot Neurosciences Neurochemistry Cell Biology Proteomics Neurology
Content Type	Text
Resource Type	Article
Subject	Medicine Cellular and Molecular Neuroscience

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Increased TRPV4 Expression in Urinary Bladder and Lumbosacral Dorsal Root Ganglia in Mice with Chronic Overexpression of NGF in Urothelium

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