Intestinal Stem Cell Pool Regulation in Drosophila

Yinhua Jin, Parthive H. Patel, Alexander Kohlmaier, Bojana Pavlović, Chenge Zhang, Bruce A. Edgar

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Abstract

Intestinal epithelial renewal is mediated by intestinal stem cells (ISCs) that exist in a state of neutral drift, wherein individual ISC lineages are regularly lost and born but ISC numbers remain constant. To test whether an active mechanism maintains stem cell pools in the Drosophila midgut, we performed partial ISC depletion. In contrast to the mouse intestine, Drosophila ISCs failed to repopulate the gut after partial depletion. Even when the midgut was challenged to regenerate by infection, ISCs retained normal proportions of asymmetric division and ISC pools did not increase. We discovered, however, that the loss of differentiated midgut enterocytes (ECs) slows when ISC division is suppressed and accelerates when ISC division increases. This plasticity in rates of EC turnover appears to facilitate epithelial homeostasis even after stem cell pools are compromised. Our study identifies unique behaviors of Drosophila midgut cells that maintain epithelial homeostasis.
Original languageEnglish
Pages (from-to)1479-1487
Number of pages9
JournalStem Cell Reports
Volume6
Issue number6
Early online date4 May 2017
DOIs
Publication statusPublished - 6 Jun 2017

Keywords

  • stem cell pool
  • stem cell behavior
  • epithelial turnover
  • midgut
  • Drosophila
  • intestinal stem cell
  • neutral drift

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    Jin, Y., Patel, P. H., Kohlmaier, A., Pavlović, B., Zhang, C., & Edgar, B. A. (2017). Intestinal Stem Cell Pool Regulation in Drosophila. Stem Cell Reports, 6(6), 1479-1487. https://doi.org/10.1016/j.stemcr.2017.04.002