RRC ID 57241
Author Xu C, Luo J, He L, Montell C, Perrimon N.
Title Oxidative stress induces stem cell proliferation via TRPA1/RyR-mediated Ca2+ signaling in the Drosophila midgut.
Journal Elife
Abstract Precise regulation of stem cell activity is crucial for tissue homeostasis and necessary to prevent overproliferation. In the Drosophila adult gut, high levels of reactive oxygen species (ROS) has been detected with different types of tissue damage, and oxidative stress has been shown to be both necessary and sufficient to trigger intestinal stem cell (ISC) proliferation. However, the connection between oxidative stress and mitogenic signals remains obscure. In a screen for genes required for ISC proliferation in response to oxidative stress, we identified two regulators of cytosolic Ca2+ levels, transient receptor potential A1 (TRPA1) and ryanodine receptor (RyR). Characterization of TRPA1 and RyR demonstrates that Ca2+ signaling is required for oxidative stress-induced activation of the Ras/MAPK pathway, which in turns drives ISC proliferation. Our findings provide a link between redox regulation and Ca2+ signaling and reveal a novel mechanism by which ISCs detect stress signals.
Volume 6
Published 2017-5-31
DOI 10.7554/eLife.22441
PMID 28561738
PMC PMC5451214
MeSH Animals Cell Proliferation* Drosophila / physiology* Drosophila Proteins / metabolism* Gastrointestinal Tract / physiology Ion Channels Oxidative Stress* Ryanodine Receptor Calcium Release Channel / metabolism* Signal Transduction Stem Cells / physiology* TRPA1 Cation Channel / metabolism*
IF 7.551
Times Cited 8