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Shp2/MAPK signaling controls goblet/paneth cell fate decisions in the intestine

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Item Type:Article
Title:Shp2/MAPK signaling controls goblet/paneth cell fate decisions in the intestine
Creators Name:Heuberger, J., Kosel, F., Qi, J., Grossmann, K.S., Rajewsky, K. and Birchmeier, W.
Abstract:In the development of the mammalian intestine, Notch and Wnt/{beta}-catenin signals control stem cell maintenance and their differentiation into absorptive and secretory cells. Mechanisms that regulate differentiation of progenitors into the three secretory lineages, goblet, paneth, or enteroendocrine cells, are not fully understood. Using conditional mutagenesis in mice, we observed that Shp2-mediated MAPK signaling determines the choice between paneth and goblet cell fates and also affects stem cells, which express the leucine-rich repeat-containing receptor 5 (Lgr5). Ablation of the tyrosine phosphatase Shp2 in the intestinal epithelium reduced MAPK signaling and led to a reduction of goblet cells while promoting paneth cell development. Conversely, conditional mitogen-activated protein kinase kinase 1 (Mek1) activation rescued the Shp2 phenotype, promoted goblet cell and inhibited paneth cell generation. The Shp2 mutation also expanded Lgr5+ stem cell niches, which could be restricted by activated Mek1 signaling. Changes of Lgr5+ stem cell quantities were accompanied by alterations of paneth cells, indicating that Shp2/MAPK signaling might affect stem cell niches directly or via paneth cells. Remarkably, inhibition of MAPK signaling in intestinal organoids and cultured cells changed the relative abundance of Tcf4 isoforms and by this, promoted Wnt/{beta}-catenin activity. The data thus show that Shp2-mediated MAPK signaling controls the choice between goblet and paneth cell fates by regulating Wnt/{beta}-catenin activity.
Keywords:PTPN11, Mek1DD, Crypt, TCF7L2, RTK, Animals, Mice
Source:Proceedings of the National Academy of Sciences of the United States of America
Publisher:National Academy of Sciences
Page Range:3472-3477
Date:4 March 2014
Official Publication:https://doi.org/10.1073/pnas.1309342111
PubMed:View item in PubMed

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