Intestinal crypt homeostasis results from neutral competition between symmetrically dividing Lgr5 stem cells - PubMed (original) (raw)

. 2010 Oct 1;143(1):134-44.

doi: 10.1016/j.cell.2010.09.016.

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• PMID: 20887898
• DOI: 10.1016/j.cell.2010.09.016

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Intestinal crypt homeostasis results from neutral competition between symmetrically dividing Lgr5 stem cells

Hugo J Snippert et al. Cell. 2010.

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Abstract

Intestinal stem cells, characterized by high Lgr5 expression, reside between Paneth cells at the small intestinal crypt base and divide every day. We have carried out fate mapping of individual stem cells by generating a multicolor Cre-reporter. As a population, Lgr5(hi) stem cells persist life-long, yet crypts drift toward clonality within a period of 1-6 months. We have collected short- and long-term clonal tracing data of individual Lgr5(hi) cells. These reveal that most Lgr5(hi) cell divisions occur symmetrically and do not support a model in which two daughter cells resulting from an Lgr5(hi) cell division adopt divergent fates (i.e., one Lgr5(hi) cell and one transit-amplifying [TA] cell per division). The cellular dynamics are consistent with a model in which the resident stem cells double their numbers each day and stochastically adopt stem or TA fates. Quantitative analysis shows that stem cell turnover follows a pattern of neutral drift dynamics.

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Comment in

• Stem cell fate in proliferating tissues: equal odds in a game of chance.
  Jones PH. Jones PH. Dev Cell. 2010 Oct 19;19(4):489-90. doi: 10.1016/j.devcel.2010.10.001. Dev Cell. 2010. PMID: 20951341
• Stem cells: dividing with symmetry.
  Baumann K. Baumann K. Nat Rev Mol Cell Biol. 2010 Nov;11(11):752. doi: 10.1038/nrm3004. Nat Rev Mol Cell Biol. 2010. PMID: 20966965 No abstract available.

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