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ARTS mediates apoptosis and regeneration of the intestinal stem cell niche

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Item Type:Article
Title:ARTS mediates apoptosis and regeneration of the intestinal stem cell niche
Creators Name:Koren, E., Yosefzon, Y., Ankawa, R., Soteriou, D., Jacob, A., Nevelsky, A., Ben-Yosef, R., Bar-Sela, G. and Fuchs, Y.
Abstract:Stem cells (SCs) play a pivotal role in fueling homeostasis and regeneration. While much focus has been given to self-renewal and differentiation pathways regulating SC fate, little is known regarding the specific mechanisms utilized for their elimination. Here, we report that the pro-apoptotic protein ARTS (a Septin4 isoform) is highly expressed in cells comprising the intestinal SC niche and that its deletion protects Lgr5(+) and Paneth cells from undergoing apoptotic cell death. As a result, the Sept4/ARTS(-/-) crypt displays augmented proliferation and, in culture, generates massive cystic-like organoids due to enhanced Wnt/β-catenin signaling. Importantly, Sept4/ARTS(-/-) mice exhibit resistance against intestinal damage in a manner dependent upon Lgr5(+) SCs. Finally, we show that ARTS interacts with XIAP in intestinal crypt cells and that deletion of XIAP can abrogate Sept4/ARTS(-/-)-dependent phenotypes. Our results indicate that intestinal SCs utilize specific apoptotic proteins for their elimination, representing a unique target for regenerative medicine.
Keywords:Apoptosis, Cell Proliferation, Cytoprotection, Gene Deletion, Inbred C57BL Mice, Intestines, Regeneration, Septins, Stem Cell Niche, Wnt Signaling Pathway, Wounds and Injuries, X-Linked Inhibitor of Apoptosis Protein, Animals, Mice
Source:Nature Communications
ISSN:2041-1723
Publisher:Nature Publishing Group
Volume:9
Number:1
Page Range:4582
Date:2 November 2018
Official Publication:https://doi.org/10.1038/s41467-018-06941-4
PubMed:View item in PubMed

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