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• W2042800923 abstract "The molecular mechanisms underlying stress urinary incontinence (SUI) at the tissue level are poorly understood. To study genetic and molecular alterations in the urethras of animals with experimentally induced SUI. Cohort analysis of primiparous 2-month-old female Sprague-Dawley rats with experimentally induced SUI versus those who did not develop SUI in a university research laboratory setting. Rats underwent intravaginal balloon dilation within 24 hours of parturition followed by bilateral ovariectomy one week later. Transvesical cystometry was performed 12 weeks after parturition. Rats were classified as continent (C) or incontinent (I) according to the results of cystometry. The expression of over 22,000 genes in urethral tissue from the two groups was assessed with the use of an oligo microarray. The expression of relevant genes was confirmed by real-time polymerase chain reaction. Protein expression of small mothers against decapentaplegic 2 (Smad2), one of the differentially expressed genes, was extensively studied by immunohistochemistry and Western blot analysis. Regulation of Smad2 activity by transforming growth factor-β (TGF-β) was assessed in cultured urethral smooth muscle cells (USMCs). After intervention, 14 (58.3%) rats remained continent and 10 (41.7%) became incontinent. There were significant differences in the expression of 42 urethral genes between continent and incontinent rats. The expression of genes involved in the TGF cellular signaling pathway (Smad2), collagen breakdown (matrix metalloproteinase 13 [Mmp13]), and smooth muscle inhibition (regulator of G-protein signaling 2 [Rgs2]) was significantly increased in the incontinent group. SMAD2 protein expression was significantly upregulated in the incontinent rats. In cultured USMCs, SMAD2 phosphorylation and nuclear translocation increased after Tgf-β treatment. Genes important in inflammation, collagen breakdown, and smooth muscle inhibition are upregulated in the urethras of female rats with parturition-associated incontinence." @default.
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• W2042800923 date "2009-05-01" @default.
• W2042800923 modified "2023-10-15" @default.
• W2042800923 title "Molecular Mechanisms Related to Parturition-Induced Stress Urinary Incontinence" @default.
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• W2042800923 doi "https://doi.org/10.1016/j.eururo.2008.02.027" @default.
• W2042800923 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3001389" @default.
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