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• W1524339949 endingPage "e0129346" @default.
• W1524339949 startingPage "e0129346" @default.
• W1524339949 abstract "Most cases of congenital obstructive nephropathy are the result of ureteropelvic junction obstructions, and despite their high prevalence, we have a poor understanding of their etiology and scarcity of genetic models. The eight-protein exocyst complex regulates polarized exocytosis of intracellular vesicles in a large variety of cell types. Here we report generation of a conditional knockout mouse for Sec10, a central component of the exocyst, which is the first conditional allele for any exocyst gene. Inactivation of Sec10 in ureteric bud-derived cells using Ksp1.3-Cre mice resulted in severe bilateral hydronephrosis and complete anuria in newborns, with death occurring 6-14 hours after birth. Sec10 FL/FL;Ksp-Cre embryos developed ureteropelvic junction obstructions between E17.5 and E18.5 as a result of degeneration of the urothelium and subsequent overgrowth by surrounding mesenchymal cells. The urothelial cell layer that lines the urinary tract must maintain a hydrophobic luminal barrier again urine while remaining highly stretchable. This barrier is largely established by production of uroplakin proteins that are transported to the apical surface to establish large plaques. By E16.5, Sec10 FL/FL;Ksp-Cre ureter and pelvic urothelium showed decreased uroplakin-3 protein at the luminal surface, and complete absence of uroplakin-3 by E17.5. Affected urothelium at the UPJ showed irregular barriers that exposed the smooth muscle layer to urine, suggesting this may trigger the surrounding mesenchymal cells to overgrow the lumen. Findings from this novel mouse model show Sec10 is critical for the development of the urothelium in ureters, and provides experimental evidence that failure of this urothelial barrier may contribute to human congenital urinary tract obstructions." @default.
• W1524339949 created "2016-06-24" @default.
• W1524339949 creator A5016868546 @default.
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• W1524339949 creator A5080781995 @default.
• W1524339949 date "2015-06-05" @default.
• W1524339949 modified "2023-10-06" @default.
• W1524339949 title "Urothelial Defects from Targeted Inactivation of Exocyst Sec10 in Mice Cause Ureteropelvic Junction Obstructions" @default.
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• W1524339949 doi "https://doi.org/10.1371/journal.pone.0129346" @default.
• W1524339949 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4457632" @default.
• W1524339949 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26046524" @default.
• W1524339949 hasPublicationYear "2015" @default.
• W1524339949 type Work @default.
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