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Drosophila intestinal stem and progenitor cells are major sources and regulators of homeostatic niche signals.

Published version
Peer-reviewed

Type

Article

Change log

Authors

Doupé, David P 
Marshall, Owen J 
Dayton, Hannah 
Brand, Andrea H 
Perrimon, Norbert 

Abstract

Epithelial homeostasis requires the precise balance of epithelial stem/progenitor proliferation and differentiation. While many signaling pathways that regulate epithelial stem cells have been identified, it is probable that other regulators remain unidentified. Here, we use gene-expression profiling by targeted DamID to identify the stem/progenitor-specific transcription and signaling factors in the Drosophila midgut. Many signaling pathway components, including ligands of most major pathways, exhibit stem/progenitor-specific expression and have regulatory regions bound by both intrinsic and extrinsic transcription factors. In addition to previously identified stem/progenitor-derived ligands, we show that both the insulin-like factor Ilp6 and TNF ligand eiger are specifically expressed in the stem/progenitors and regulate normal tissue homeostasis. We propose that intestinal stem cells not only integrate multiple signals but also contribute to and regulate the homeostatic signaling microenvironmental niche through the expression of autocrine and paracrine factors.

Description

Keywords

epithelial homeostasis, insulin, microenvironment, niche, stem cells, Animals, Drosophila, Drosophila Proteins, Homeostasis, Intestines, Signal Transduction, Stem Cell Niche, Stem Cells

Journal Title

Proc Natl Acad Sci U S A

Conference Name

Journal ISSN

0027-8424
1091-6490

Volume Title

115

Publisher

Proceedings of the National Academy of Sciences
Sponsorship
Wellcome Trust (092545/Z/10/Z)
Biotechnology and Biological Sciences Research Council (BB/L00786X/1)
Wellcome Trust (103792/Z/14/Z)
Wellcome Trust (092096/Z/10/Z)
Cancer Research Uk (None)