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Sensory Dysfunction of Bladder Mucosa and Bladder Oversensitivity in a Rat Model of Metabolic Syndrome
PURPOSE: To study the role of sensory dysfunction of bladder mucosa in bladder oversensitivity of rats with metabolic syndrome. MATERIALS AND METHODS: Female Wistar rats were fed a fructose-rich diet (60%) or a normal diet for 3 months. Based on cystometry, the fructose-fed rats (FFRs) were divided...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Public Library of Science
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3446912/ https://www.ncbi.nlm.nih.gov/pubmed/23029112 http://dx.doi.org/10.1371/journal.pone.0045578 |
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author | Lee, Wei-Chia Chiang, Po-Hui Tain, You-Lin Wu, Chia-Ching Chuang, Yao-Chi |
author_facet | Lee, Wei-Chia Chiang, Po-Hui Tain, You-Lin Wu, Chia-Ching Chuang, Yao-Chi |
author_sort | Lee, Wei-Chia |
collection | PubMed |
description | PURPOSE: To study the role of sensory dysfunction of bladder mucosa in bladder oversensitivity of rats with metabolic syndrome. MATERIALS AND METHODS: Female Wistar rats were fed a fructose-rich diet (60%) or a normal diet for 3 months. Based on cystometry, the fructose-fed rats (FFRs) were divided into a group with normal detrusor function or detrusor overactivity (DO). Acidic adenosine triphosphate (ATP) solution (5mM, pH 3.3) was used to elicit reflex micturition. Cystometric parameters were evaluated before and after drug administration. Functional proteins of the bladder mucosa were assessed by western blotting. RESULTS: Compared to the controls, intravesical acidic ATP solution instillation induced a significant increase in provoked phasic contractions in both FFR groups and a significant decrease in the mean functional bladder capacity of group DO. Pretreatment with capsaicin for C-fiber desentization, intravesical liposome for mucosal protection, or intravenous pyridoxal 5-phosphate 6-azophenyl-2′,4′-disulfonic acid for antagonized purinergic receptors can interfere with the urodynamic effects of intravesical ATP in FFRs and controls. Over-expression of TRPV1, P2X(3), and iNOS proteins, and down-regulation of eNOS proteins were observed in the bladder mucosa of both fructose-fed groups. CONCLUSIONS: Alterations of sensory receptors and enzymes in the bladder mucosa, including over-expression of TRPV1, P2X(3), and iNOS proteins, can precipitate the emergence of bladder phasic contractions and oversensitivity through the activation of C-afferents during acidic ATP solution stimulation in FFRs. The down-regulation of eNOS protein in the bladder mucosa of FFRs may lead to a failure to suppress bladder oversensitivity and phasic contractions. Sensory dysfunction of bladder mucosa and DO causing by metabolic syndrome are easier to elicit bladder oversensitivity to certain urothelium stimuli. |
format | Online Article Text |
id | pubmed-3446912 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-34469122012-10-01 Sensory Dysfunction of Bladder Mucosa and Bladder Oversensitivity in a Rat Model of Metabolic Syndrome Lee, Wei-Chia Chiang, Po-Hui Tain, You-Lin Wu, Chia-Ching Chuang, Yao-Chi PLoS One Research Article PURPOSE: To study the role of sensory dysfunction of bladder mucosa in bladder oversensitivity of rats with metabolic syndrome. MATERIALS AND METHODS: Female Wistar rats were fed a fructose-rich diet (60%) or a normal diet for 3 months. Based on cystometry, the fructose-fed rats (FFRs) were divided into a group with normal detrusor function or detrusor overactivity (DO). Acidic adenosine triphosphate (ATP) solution (5mM, pH 3.3) was used to elicit reflex micturition. Cystometric parameters were evaluated before and after drug administration. Functional proteins of the bladder mucosa were assessed by western blotting. RESULTS: Compared to the controls, intravesical acidic ATP solution instillation induced a significant increase in provoked phasic contractions in both FFR groups and a significant decrease in the mean functional bladder capacity of group DO. Pretreatment with capsaicin for C-fiber desentization, intravesical liposome for mucosal protection, or intravenous pyridoxal 5-phosphate 6-azophenyl-2′,4′-disulfonic acid for antagonized purinergic receptors can interfere with the urodynamic effects of intravesical ATP in FFRs and controls. Over-expression of TRPV1, P2X(3), and iNOS proteins, and down-regulation of eNOS proteins were observed in the bladder mucosa of both fructose-fed groups. CONCLUSIONS: Alterations of sensory receptors and enzymes in the bladder mucosa, including over-expression of TRPV1, P2X(3), and iNOS proteins, can precipitate the emergence of bladder phasic contractions and oversensitivity through the activation of C-afferents during acidic ATP solution stimulation in FFRs. The down-regulation of eNOS protein in the bladder mucosa of FFRs may lead to a failure to suppress bladder oversensitivity and phasic contractions. Sensory dysfunction of bladder mucosa and DO causing by metabolic syndrome are easier to elicit bladder oversensitivity to certain urothelium stimuli. Public Library of Science 2012-09-19 /pmc/articles/PMC3446912/ /pubmed/23029112 http://dx.doi.org/10.1371/journal.pone.0045578 Text en © 2012 Lee et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Lee, Wei-Chia Chiang, Po-Hui Tain, You-Lin Wu, Chia-Ching Chuang, Yao-Chi Sensory Dysfunction of Bladder Mucosa and Bladder Oversensitivity in a Rat Model of Metabolic Syndrome |
title | Sensory Dysfunction of Bladder Mucosa and Bladder Oversensitivity in a Rat Model of Metabolic Syndrome |
title_full | Sensory Dysfunction of Bladder Mucosa and Bladder Oversensitivity in a Rat Model of Metabolic Syndrome |
title_fullStr | Sensory Dysfunction of Bladder Mucosa and Bladder Oversensitivity in a Rat Model of Metabolic Syndrome |
title_full_unstemmed | Sensory Dysfunction of Bladder Mucosa and Bladder Oversensitivity in a Rat Model of Metabolic Syndrome |
title_short | Sensory Dysfunction of Bladder Mucosa and Bladder Oversensitivity in a Rat Model of Metabolic Syndrome |
title_sort | sensory dysfunction of bladder mucosa and bladder oversensitivity in a rat model of metabolic syndrome |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3446912/ https://www.ncbi.nlm.nih.gov/pubmed/23029112 http://dx.doi.org/10.1371/journal.pone.0045578 |
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