Abstract
Purpose: Although a dual origin of the vagina has been popularized, other theories support a mullerian or wolffian duct origin or various combinations of these structures and the urogenital sinus. Uroplakins are specialized membrane proteins of the urothelial plaque, constituting the asymmetrical unit membrane of the bladder, and represent specific molecular markers of urothelial differentiation. We hypothesize that the epithelium of the dorsal wall of the urogenital sinus is involved in the formation of the sinovaginal bulbs and will express uroplakins. In addition, localization of the androgen receptor and its temporal expression during development may in part explain the varied effects of androgens on the lower female genital tract in congenital adrenal hyperplasia.Materials and Methods: Lower genitourinary tracts from 4 human female fetuses (9 to 18 weeks) were serially sagittally sectioned. Representative sections were stained with hematoxylin and eosin, rabbit antibodies against panuroplakin and ant...
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