The Effects of Tempol on Cyclophosphamide-Induced Oxidative Stress in Rat Micturition Reflexes
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- Eric J. Gonzalez
- Department of Neurological Sciences, University of Vermont College of Medicine, Burlington, VT 05405, USA
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- Abbey Peterson
- Department of Neurological Sciences, University of Vermont College of Medicine, Burlington, VT 05405, USA
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- Susan Malley
- Department of Neurological Sciences, University of Vermont College of Medicine, Burlington, VT 05405, USA
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- Mitchel Daniel
- Department of Neurological Sciences, University of Vermont College of Medicine, Burlington, VT 05405, USA
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- Daniel Lambert
- Department of Neurological Sciences, University of Vermont College of Medicine, Burlington, VT 05405, USA
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- Michael Kosofsky
- Department of Neurological Sciences, University of Vermont College of Medicine, Burlington, VT 05405, USA
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- Margaret A. Vizzard
- Department of Neurological Sciences, University of Vermont College of Medicine, Burlington, VT 05405, USA
抄録
<jats:p>We hypothesized that cyclophosphamide- (CYP-) induced cystitis results in oxidative stress and contributes to urinary bladder dysfunction. We determined (1) the expression of oxidative stress markers 3-nitrotyrosine (3-NT), reactive oxygen species (ROS)/reactive nitrogen species (RNS), inflammatory modulators, neuropeptides calcitonin gene-related peptide (CGRP), substance P (Sub P), and adenosine triphosphate (ATP) that contribute to the inflammatory process in the urinary tract and (2) the functional role of oxidative stress in urinary bladder dysfunction with an antioxidant, Tempol, (1 mM in drinking water) combined with conscious cystometry. In CYP-treated (4 hr or 48 hr; 150 mg/kg, i.p.) rats, ROS/RNS and 3-NT significantly (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mi>P</mml:mi><mml:mo>≤</mml:mo><mml:mn fontstyle="italic">0.01</mml:mn></mml:math>) increased in urinary bladder. CYP treatment increased ATP, Sub P, and CGRP expression in the urinary bladder and cystometric fluid. In CYP-treated rats, Tempol significantly (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M2"><mml:mi>P</mml:mi><mml:mo>≤</mml:mo><mml:mn fontstyle="italic">0.01</mml:mn></mml:math>) increased bladder capacity and reduced voiding frequency compared to CYP-treated rats without Tempol. Tempol significantly (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M3"><mml:mi>P</mml:mi><mml:mo>≤</mml:mo><mml:mn fontstyle="italic">0.01</mml:mn></mml:math>) reduced ATP expression, 3-NT, and ROS/RNS expression in the urinary tract of CYP-treated rats. These studies demonstrate that reducing oxidative stress in CYP-induced cystitis improves urinary bladder function and reduces markers of oxidative stress and inflammation.</jats:p>
収録刊行物
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- The Scientific World Journal
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The Scientific World Journal 2015 1-13, 2015
Hindawi Limited
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キーワード
詳細情報 詳細情報について
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- CRID
- 1360016868724922112
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- ISSN
- 1537744X
- 23566140
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- データソース種別
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- Crossref