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• W2111623323 abstract "p53 is best known as a tumor suppressor that regulates cell-cycle, differentiation, and apoptosis pathways, but its potential role in embryonic development and organogenesis remains controversial. Here, p53(-/-) embryos bred on C57Bl6 background exhibited a spectrum of congenital abnormalities of the kidney and urinary tract, including ureteric bud (UB) ectopia, double ureters/collecting systems, delayed primary branching of the UB, and hypoplastic metanephroi. We observed ectopic UB outgrowth from the Wolffian duct (WD) in one third of p53(-/-) embryos. The prevalence of duplex was higher in embryos than in neonates, and ex vivo organ culture suggested that ectopic ureters can regress over time, leaving behind a dysplastic pole (segmental dysgenesis). Transgenic expression of dominant negative p53 or conditional inactivation of p53 in the UB but not in the metanephric mesenchyme lineage recapitulated the duplex phenotype. Mechanistically, p53 inactivation in the WD associated with enhanced sensitivity to glial cell line-derived neurotrophic factor (GDNF)-induced ectopic budding and potentiated phosphatidylinositol-3 kinase activation by GDNF in UB cells. Unlike several other models of UB ectopia, hypersensitivity of p53(-/-) WD to GDNF is not accompanied by reduced Sprouty-1 or anterior expansion of the GDNF domain. In summary, our data lend support for a restrictive role for p53 activity in UB outgrowth from the WD." @default.
• W2111623323 created "2016-06-24" @default.
• W2111623323 creator A5006410472 @default.
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• W2111623323 creator A5089950604 @default.
• W2111623323 date "2009-11-01" @default.
• W2111623323 modified "2023-10-08" @default.
• W2111623323 title "p53 Regulates Metanephric Development" @default.
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• W2111623323 doi "https://doi.org/10.1681/asn.2008121224" @default.
• W2111623323 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2799183" @default.
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