Wnt4
WNT4 is a secreted Wnt ligand that regulates kidney tubulogenesis and female reproductive development[1][2]. Mechanistically, Wnt4 acts as an autoinducer of metanephric mesenchyme-to-epithelium transition during nephron development[1]. Wnt4 also supports Müllerian duct formation and suppresses ectopic testosterone biosynthesis in female embryos[2]. In disease models, WNT4 loss-of-function causes Müllerian-duct regression, virilization, renal defects, and SERKAL syndrome phenotypes[3][4]. Compared with related isoforms, Wnt9b functions upstream of Wnt4 in urogenital mesenchymal induction, while Wnt4 propagates epithelial renal vesicle formation[5]. Recombinant Wnt4 protein induces nephronic tubules and differentiation markers without strong canonical β-catenin activation, supporting its use in kidney development models[6].
References:
- [1]. Stark K, et al. Epithelial transformation of metanephric mesenchyme in the developing kidney regulated by Wnt-4. Nature. 1994 Dec 15;372(6507):679-83. [Content Brief]
- [2]. Vainio S, et al. Female development in mammals is regulated by Wnt-4 signalling. Nature. 1999 Feb 4;397(6718):405-9. [Content Brief]
- [3]. Biason-Lauber A, et al. A WNT4 mutation associated with Müllerian-duct regression and virilization in a 46,XX woman. N Engl J Med. 2004 Aug 19;351(8):792-8. [Content Brief]
- [4]. Mandel H, et al. SERKAL syndrome: an autosomal-recessive disorder caused by a loss-of-function mutation in WNT4. Am J Hum Genet. 2008 Jan;82(1):39-47. [Content Brief]
- [5]. Carroll TJ, et al. Wnt9b plays a central role in the regulation of mesenchymal to epithelial transitions underlying organogenesis of the mammalian urogenital system. Dev Cell. 2005 Aug;9(2):283-92. [Content Brief]
- [6]. Tanigawa S, et al. Wnt4 induces nephronic tubules in metanephric mesenchyme by a non-canonical mechanism. Dev Biol. 2011 Apr 1;352(1):58-69. [Content Brief]
