• Yasuhito Funahashi, Tomohiko Oguchi, William F Goins, Momokazu Gotoh, Pradeep Tyagi, James R Goss, Joseph C Glorioso, and Naoki Yoshimura.
• Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15213, USA.
• J. Urol. 2013 Jan 1;189(1):366-73.

PurposeWe examined the effects of tumor necrosis factor-α blockade on bladder overactivity and nociception using replication defective HSV vectors expressing tumor necrosis factor-α soluble receptor.Materials And MethodsHSV vectors expressing tumor necrosis factor-α soluble receptor or β-galactosidase/green fluorescent protein as the control were injected into the bladder wall of female Sprague-Dawley® rats. Green fluorescent protein was observed with fluorescent microscopy in the bladder and L6 dorsal root ganglia. mRNA and protein expression of tumor necrosis factor-α, and interleukin-1β and 6 as well as myeloperoxidase activity in the bladder were determined by quantitative reverse transcriptase-polymerase chain reaction and enzyme-linked immunosorbent assay 4 hours after intravesical resiniferatoxin administration. c-Fos positive neurons were counted in the L6 spinal dorsal horn. Cystometry and behavioral analyses were also performed.ResultsGreen fluorescent protein expression was confirmed in the bladder and L6 dorsal root ganglia. Resiniferatoxin administration significantly increased tumor necrosis factor-α mRNA and protein levels in the bladder in controls. Tumor necrosis factor-α mRNA was also increased in the tumor necrosis factor-α soluble receptor group, although tumor necrosis factor-α protein up-regulation was suppressed. The up-regulation of interleukin-1β and 6 mRNA and protein levels, and the myeloperoxidase activity seen in controls were suppressed in the tumor necrosis factor-α soluble receptor group. c-Fos positive cells in the L6 spinal dorsal horn were less prominent in the tumor necrosis factor-α soluble receptor group than in controls. On cystometry the significant decrease in intercontraction intervals after resiniferatoxin infusion detected in controls was not seen in the tumor necrosis factor-α soluble receptor group. On behavioral analyses freezing behavior was significantly decreased in the tumor necrosis factor-α soluble receptor group without affecting licking behavior.ConclusionsHSV vector mediated tumor necrosis factor-α blockade gene therapy in the bladder and bladder afferent pathways decreases the bladder pain and overactivity induced by nociceptive bladder stimuli.Copyright © 2013 American Urological Association Education and Research, Inc. Published by Elsevier Inc. All rights reserved.

15 keywords...

hide…