Imperial College London
Alternate

ProfessorPraveenAnand

Faculty of Medicine, Department of Brain Sciences

Professor
 
 
 
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Contact

 

+44 (0)20 3313 3319p.anand

 
 
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Location

 

Area A Grd FloorUnknownHammersmith Campus

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Summary

 

Publications

Citation

BibTex format

@article{Anand:2019:10.1177/1744806919881038,
author = {Anand, U and Korchev, Y and Anand, P},
doi = {10.1177/1744806919881038},
journal = {Molecular Pain},
title = {The role of urea in neuronal degeneration and sensitization: an in vitro model of uremic neuropathy},
url = {http://dx.doi.org/10.1177/1744806919881038},
volume = {15},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Background: Uremic neuropathy commonly affects patients with chronic kidney disease (CKD), with painful sensations in the feet, followed by numbness and weakness in the legs and hands.  The symptoms usually resolve following kidney transplantation, but the mechanisms of uremic neuropathy and associated pain symptoms remain unknown. As blood urea levels are elevated inpatients with CKD, we examined the morphological and functional effects of clinically observed levels of urea on sensory neurons. Methods: Rat DRG neurons were treated with 10or50 mMol/L urea for 48 hours, fixed and immunostained for PGP9.5 and βIII tubulin immunofluorescence, ,.  Neurons were also immunostained for TRPV1, TRPM8 and Gap43 expression, and the capsaic insensitivity of urea or vehicle treated neurons was  determined.Results: Urea treated neurons had degenerating neurites with diminished PGP9.5 immunofluorescence,and swollen, retracted growth cones.  βIII tubulin appeared clumped after urea treatment.  Neurite lengths were significantly reduced to 60 ± 2.6%(10 mMol/L, P<0.01), and to 56.2± 3.3 %, (50 mMol/L, P<0.01),urea treatmentfor 48 hours, compared with control neurons. Fewer neurons survived urea treatment,with 70.08 ± 13.3% remaining after 10 mMol/L (P<0.05), and 61.49 ± 7.4 % after 50 mMol/L ureatreatment (P<0.01), compared with controls.  The proportion of neurons expressing TRPV1 wasreduced after urea treatment, but not TRPM8 expressing neurons. In functional studies, treatment with urea resulted in dose-dependent neuronal sensitization.Capsaicinresponses were significantly increased to 115.29 ± 3.4%(10 mMol/L, P<0.01) and 125.3 ± 4.2%(50 mMol/L,P<0.01), compared with controls. Sensitization due to urea was eliminated in the presence of the TRPV1 inhibitor SB705498, the MEKinhibitor PD98059,the PI3 kinase inhibitor LY294002, and the TRPM8 inhibitor AMTB. ConclusionNeurite degenerationandsensitization a
AU  - Anand,U
AU  - Korchev,Y
AU  - Anand,P
DO  - 10.1177/1744806919881038
PY  - 2019///
SN  - 1744-8069
TI  - The role of urea in neuronal degeneration and sensitization: an in vitro model of uremic neuropathy
T2  - Molecular Pain
UR  - http://dx.doi.org/10.1177/1744806919881038
UR  - http://hdl.handle.net/10044/1/73349
VL  - 15
ER  -
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