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- W2145424250 endingPage "4791" @default.
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- W2145424250 abstract "ABSTRACT Gene targeting experiments have shown that the murine Hoxa-13 and Hoxd-13 paralogous genes control skeletal patterning in the distal region of the developing limbs. However, both genes are also expressed in the terminal part of the digestive and urogenital tracts during embryogenesis and postnatal development. Here, we report the abnormalities occuring in these systems in Hoxa-13−/− and Hoxa-13/Hoxd-13 compound mutant mice. Hoxa-13−/− mutant fetuses show agenesis of the caudal portion of the Müllerian ducts, lack of development of the presumptive urinary bladder and premature stenosis of the umbilical arteries, which could account for the lethality of this mutation at mid-gestational stages. Due to such lethality, only Hoxa-13+/−/Hoxd-13−/− compound mutants can reach adulthood. These compound mutants display: (i) agenesis or hypoplasia of some of the male accessory sex glands, (ii) malpositioning of the vaginal, urethral and anal openings, and improper separation of the vagina from the urogenital sinus, (iii) hydronephrosis and (iv) anomalies of the muscular and epithelial layers of the rectum. Thus, Hoxa-13 and Hoxd-13 play important roles in the morphogenesis of the terminal part of the gut and urogenital tract. While Hoxa-13−/−/Hoxd-13+/− fetuses show severely impaired development of the urogenital sinus, double null (Hoxa-13−/−/Hoxd-13−/−) fetuses display no separation of the terminal (cloacal) hindgut cavity into a urogenital sinus and presumptive rectum, and no development of the genital bud, thereby demonstrating that both genes act, in a partly redundant manner, during early morphogenesis of posterior trunk structures." @default.
- W2145424250 created "2016-06-24" @default.
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- W2145424250 date "1997-12-01" @default.
- W2145424250 modified "2023-10-16" @default.
- W2145424250 title "Gene dosage-dependent effects of the <i>Hoxa-13</i> and <i>Hoxd-13</i> mutations on morphogenesis of the terminal parts of the digestive and urogenital tracts" @default.
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- W2145424250 doi "https://doi.org/10.1242/dev.124.23.4781" @default.
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