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• W2024096303 abstract "Objectives Interstitial cystitis (IC) is a painful bladder syndrome associated with urinary frequency and urgency. Elusive cause of IC makes its diagnosis only possible by exclusion in many cases. In this study, we used proteomics for identifying disease-associated proteins in a rat model of chronic bladder irritation. Methods Chronic irritation of the rat bladder was caused by a brief (90 seconds) intravesical instillation of 0.2 mL of 0.4 N HCl. Whole bladders were collected at different time points after treatment, snap frozen, and nuclear and cytosolic protein extracts were obtained. Samples were resolved in standard 2-dimensional (2D) gels stained with an improved Coomasie stain or by differential gel electrophoresis (DIGE). Differentially expressed spots were excised and identified by MALDI-TOF MS/MS. Histologic and Western blot analyses were also performed. Results Bladder morphology and histologic appearance of bladder sections after HCl treatment reflected hemorrhage, edema, epithelial denudation, detrusor mastocytosis, and eosinophilia. Proteomic analysis of irritated rat bladder revealed marked overexpression of 4 nuclear proteins and marked underexpression of 1 nuclear protein compared with normal rat bladders. Among these proteins, inflammation-associated calgranulin A (over) and smooth muscle protein-22/transgelin (under) showed opposed expression patterns after bladder irritation. Conclusions Presence of mast cells and eosinophils and overexpression of calgranulin A confirm the inflammatory component of HCl-irritated bladder. Altered expression of nuclear proteins is of particular interest because of their possible role as a prognostic marker in inflammatory bladder disorders. However, more studies are needed before clinical application of these findings can be established. Interstitial cystitis (IC) is a painful bladder syndrome associated with urinary frequency and urgency. Elusive cause of IC makes its diagnosis only possible by exclusion in many cases. In this study, we used proteomics for identifying disease-associated proteins in a rat model of chronic bladder irritation. Chronic irritation of the rat bladder was caused by a brief (90 seconds) intravesical instillation of 0.2 mL of 0.4 N HCl. Whole bladders were collected at different time points after treatment, snap frozen, and nuclear and cytosolic protein extracts were obtained. Samples were resolved in standard 2-dimensional (2D) gels stained with an improved Coomasie stain or by differential gel electrophoresis (DIGE). Differentially expressed spots were excised and identified by MALDI-TOF MS/MS. Histologic and Western blot analyses were also performed. Bladder morphology and histologic appearance of bladder sections after HCl treatment reflected hemorrhage, edema, epithelial denudation, detrusor mastocytosis, and eosinophilia. Proteomic analysis of irritated rat bladder revealed marked overexpression of 4 nuclear proteins and marked underexpression of 1 nuclear protein compared with normal rat bladders. Among these proteins, inflammation-associated calgranulin A (over) and smooth muscle protein-22/transgelin (under) showed opposed expression patterns after bladder irritation. Presence of mast cells and eosinophils and overexpression of calgranulin A confirm the inflammatory component of HCl-irritated bladder. Altered expression of nuclear proteins is of particular interest because of their possible role as a prognostic marker in inflammatory bladder disorders. However, more studies are needed before clinical application of these findings can be established." @default.
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• W2024096303 date "2008-03-01" @default.
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• W2024096303 title "Proteomic Investigation on Chronic Bladder Irritation in the Rat" @default.
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• W2024096303 doi "https://doi.org/10.1016/j.urology.2007.10.069" @default.
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