In Vivo Imaging Reveals Existence of Crypt Fission and Fusion in Adult Mouse Intestine

Lotte Bruens, Saskia I J Ellenbroek, Jacco van Rheenen, Hugo J Snippert

Research output: Contribution to journal/periodicalArticleScientificpeer-review

Abstract

The intestinal epithelium is a repetitive sheet of crypt and villus units with stem cells at the bottom of the crypts. During postnatal development, crypts multiply via fission, generating 2 daughter crypts from 1 parental crypt. In the adult intestine, crypt fission is observed at a low frequency. Using intravital microscopy in Lgr5EGFP-Ires-CreERT2 mice, we monitored individual crypt dynamics over multiple days with single-cell resolution. We discovered the existence of crypt fusion, an almost exact reverse phenomenon of crypt fission, in which 2 crypts fuse into 1 daughter crypt. Examining 819 crypts in 4 mice, we found that 3.5% ± 0.6% of all crypts were in the process of fission, whereas 4.1 ± 0.9% of all crypts were undergoing crypt fusion. As counteracting processes, crypt fission and fusion could regulate crypt numbers during the lifetime of a mouse. Identifying the mechanisms that regulate rates of crypt fission and fusion could provide insights into intestinal adaptation to altered environmental conditions and disease pathogenesis.

Original languageEnglish
Pages (from-to)674-677.e3
JournalGastroenterology
Volume153
Issue number3
DOIs
Publication statusPublished - Sep 2017

Keywords

  • Animals
  • Cell Fusion
  • Female
  • Homeostasis
  • Intestinal Mucosa
  • Intravital Microscopy
  • Male
  • Mice
  • Stem Cells
  • Journal Article

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