The R-spondin/Lgr5/Rnf43 module: regulator of Wnt signal strength.
The R-spondin/Lgr5/Rnf43 module: regulator of Wnt signal strength.
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DOI:
10.1101/gad.235473.113
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发表时间:
2014-02-15
影响因子:
10.5
通讯作者:
Clevers H
中科院分区:
文献类型:
--
作者:
de Lau W;Peng WC;Gros P;Clevers H
Adult stem cells are controlled by an intricate interplay of potent Wnt agonists, antagonists, and anti-antagonists. This review by de Lau et al. focuses on the complex physical and functional interactions of three recently discovered protein families that control stem cell activity by regulating surface expression of Wnt receptors: Lgr5 and its homologs, the E3 ligases Rnf43 and Znrf3, and the secreted R-spondin ligands. Lgr5 was originally discovered as a common Wnt target gene in adult intestinal crypts and colon cancer. It was subsequently identified as an exquisite marker of multiple Wnt-driven adult stem cell types. Lgr5 and its homologs, Lgr4 and Lgr6, constitute the receptors for R-spondins, potent Wnt signal enhancers and stem cell growth factors. The Lgr5/R-spondin complex acts by neutralizing Rnf43 and Znrf3, two transmembrane E3 ligases that remove Wnt receptors from the stem cell surface. Rnf43/Znrf3 are themselves encoded by Wnt target genes and constitute a negative Wnt feedback loop. Thus, adult stem cells are controlled by an intricate interplay of potent Wnt agonists, antagonists, and anti-antagonists.
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影响因子:
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Glinka, A;Wu, W;Niehrs, C
通讯作者:
Niehrs, C
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