Cited by 575Cancer Cells and MetastasisDigestive system and related healthWnt/β-catenin signaling in development and cancer

Lgr5 stem cells are indispensable for radiation-induced intestinal regeneration

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Metcalfe, Ciara, Kljavin, Noelyn M., Ybarra, Ryan, de Sauvage, Frederic J.·2014·Cell Stem Cell

Abstract

The intestinal epithelium continually self-renews and can rapidly regenerate after damage. Lgr5 marks mitotically active intestinal stem cells (ISCs). Importantly, intestinal homeostasis can be maintained after depletion of Lgr5(+) cells due to the activation of Lgr5(-) reserve ISCs. The Lgr5(-) ISC populations are thought to play a similar role during intestinal regeneration following radiation-induced damage. We tested this regeneration hypothesis by combining depletion of Lgr5(+) ISCs with radiation exposure. In contrast to the negligible effect of Lgr5(+) ISC loss during homeostasis, depletion of Lgr5(+) cells during radiation-induced damage and subsequent repair caused catastrophic crypt loss and deterioration of crypt-villus architecture. Interestingly though, we found that crypts deficient for Lgr5(+) cells are competent to undergo hyperplasia upon loss of Apc. These data argue that Lgr5(-) reserve stem cells are radiosensitive and that Lgr5(+) cells are crucial for robust intestinal regeneration following radiation exposure but are dispensable for premalignant hyperproliferation.

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Crossref · 10.1016/j.stem.2013.11.008

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  • Irradiation in the intestinal epithelium is accompanied by crypt shrinking because of apoptosis, followed by a burst of proliferative response predominantly from existing/surviving ISCs.

    “Irradiation in the intestinal epithelium is accompanied by crypt shrinking because of apoptosis, followed by a burst of proliferative response predominantly from existing/surviving ISCs (Metcalfe et al., 2014), usually leading to an increase in crypt depth followed by crypt fission.”

    From Canonical Wnt Signaling Ameliorates Aging of Intestinal Stem Cells (2017) · cites this paper as Metcalfe et al., 2014

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Authors
Metcalfe, C., Kljavin, N. M., Ybarra, R., & de Sauvage, F. J.
Affiliations
Genentech (US)
Venue
Cell Stem Cell
Publisher
Elsevier BV
Published
2014-02
Volume
14
Issue
2
Pages
149-159
ISSN
  • 1875-9777 (ISSN-L)
  • 1934-5909
OpenAlex
W2029556699
Cited by
575
References
40
Citations by year
2026: 39 · 2025: 36 · 2024: 48 · 2023: 36 · 2022: 46 · 2021: 52 · 2020: 59 · 2019: 50 · 2018: 61 · 2017: 42 · 2016: 41 · 2015: 41 · 2014: 24
FWCI
18.93
Type
journal article
Language
en
Open access
Locations
  • Cell stem cell (publishedVersion)
  • PubMed (publishedVersion)
Funders
Genentech
Topics
  • Health Sciences › Medicine › Oncology › Cancer Cells and Metastasis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Digestive system and related health
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Wnt/β-catenin signaling in development and cancer
Keywords
Lgr5, intestinal stem cells, radiation enteritis, intestinal regeneration, APC loss, intestinal hyperplasia, stem cell depletion, intestinal homeostasis
MeSH terms
Animals, Colitis, Diphtheria Toxin, Dose-Response Relationship, Radiation, Hyperplasia, Intestines, Radiation, Ionizing, Regeneration, Stem Cells, Dextran Sulfate, Paneth Cells, Models, Animal, Adenomatous Polyposis Coli Protein, Receptors, G-Protein-Coupled, Mice

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