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Wnt Ligands Secreted by Subepithelial Mesenchymal Cells Are Essential for the Survival of Intestinal Stem Cells and Gut Homeostasis

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Progesterone and Wnt4 control mammary stem cells via myoepithelial crosstalk

Cathrin Brisken, Jacques Rougemont, Ayyakkannu Ayyanan, Marian Caikovski, Renuga Devi Rajaram, Duje Buric

Ovarian hormones increase breast cancer risk by poorly understood mechanisms. We assess the role of progesterone on global stem cell function by serially transplanting mouse mammary epithelia. Progesterone receptor (PR) deletion severely reduces the regene ...

Wiley-Blackwell2015

ProNodal acts via FGFR3 to govern duration of Shh expression in the prechordal mesoderm

Daniel Constam

The secreted glycoprotein sonic hedgehog (Shh) is expressed in the prechordal mesoderm, where it plays a crucial role in induction and patterning of the ventral forebrain. Currently little is known about how Shh is regulated in prechordal tissue. Here we s ...

Company of Biologists2015

Wnt directs the endosomal flux of LDL-derived cholesterol and lipid droplet homeostasis

Olivier Martin, Gerardo Turcatti, Nicolas Jean Philippe Guex, Marc Chambon

The Wnt pathway, which controls crucial steps of the development and differentiation programs, has been proposed to influence lipid storage and homeostasis. In this paper, using an unbiased strategy based on high-content genome-wide RNAi screens that monit ...

Nature Publishing Group2015

Aberrantly active Wnt signaling is the hallmark driver of colorectal cancer (CRC). Bcl9/9l proteins are components of the main transcriptional activation complex of canonical Wnt signaling and interact with beta-catenin via a highly conserved homology doma ...

EPFL2014

Wnt-regulated dynamics of positional information in zebrafish somitogenesis

Andrew Charles Oates

How signaling gradients supply positional information in a field of moving cells is an unsolved question in patterning and morphogenesis. Here, we ask how a Wnt signaling gradient regulates the dynamics of a wavefront of cellular change in a flow of cells ...

2014

Bcl9 and Bcl9l (Bcl9/9l) encode Wnt signaling components that mediate the interaction between beta-catenin and Pygopus (Pygo) via two evolutionarily conserved domains, HD1 and HD2, respectively. We generated mouse strains lacking these domains to probe the ...

Cold Spring Harbor Laboratory Press2014

Pygopus has been discovered as a fundamental Wnt signaling component in Drosophila. The mouse genome encodes two Pygopus homologs, Pygo1 and Pygo2. They serve as context-dependent beta-catenin coactivators, with Pygo2 playing the more important role. All P ...

Company Of Biologists Ltd2013

Autolysosomal β-catenin degradation regulates Wnt-autophagy-p62 crosstalk

Paloma Ordonez Moran

Abstract The Wnt/β-catenin signalling and autophagy pathways each play important roles during development, adult tissue homeostasis and tumorigenesis. Here we identify the Wnt/β-catenin signalling pathway as a negative regulator of both basal and stress-in ...

Nature Publishing Group2013

Lrig1: a new master regulator of epithelial stem cells

Paloma Ordonez Moran

The intestine represents the most vigorously renewing, adult epithelial tissue that makes maintenance of its homeostasis a delicate balance between proliferation, cell cycle arrest, migration, differentiation, and cell death. These processes are precisely ...

2012

The Intestinal Epithelium

Luca Pellegrinet

The mammalian intestine is a prototype of a self-renewing organ. The rapid cellular turnover is supported by proliferating progenitors located in the intestinal crypt, which is also the stem cell location. Homeostasis of the intestinal epithelium has to be ...

EPFL2011