1. Developmental Biology
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Fizzy-related dictates a cell cycle switch during organ repair and tissue growth responses in the Drosophila hindgut

  1. Erez Cohen
  2. Scott R Allen
  3. Jessica K Sawyer
  4. Donald T Fox  Is a corresponding author
  1. Duke University, United States
Research Article
  • Cited 14
  • Views 2,090
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Cite this article as: eLife 2018;7:e38327 doi: 10.7554/eLife.38327

Abstract

Ploidy-increasing cell cycles drive tissue growth in many developing organs. Such cycles, including endocycles, are increasingly appreciated to drive tissue growth following injury or activated growth signaling in mature organs. In these organs, the regulation and distinct roles of different cell cycles remains unclear. Here, we uncover a programmed switch between cell cycles in the Drosophila hindgut pylorus. Using an acute injury model, we identify mitosis as the response in larval pyloric cells, whereas endocycles occur in adult pyloric cells. By developing a novel genetic method, DEMISE (Dual-Expression-Method-for-Induced-Site-specific-Eradication), we show the cell cycle regulator Fizzy-related dictates the decision between mitosis and endocycles. After injury, both cycles accurately restore tissue mass and genome content. However, in response to sustained growth signaling, only endocycles preserve epithelial architecture. Our data reveal distinct cell cycle programming in response to similar stimuli in mature vs. developmental states and reveal a tissue-protective role of endocycles.

Article and author information

Author details

  1. Erez Cohen

    Department of Cell Biology, Duke University, Durham, United States
    Competing interests
    The authors declare that no competing interests exist.
  2. Scott R Allen

    Department of Cell Biology, Duke University, Durham, United States
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-4809-0493
  3. Jessica K Sawyer

    Department of Pharmacology and Cancer Biology, Duke University, Durham, United States
    Competing interests
    The authors declare that no competing interests exist.
  4. Donald T Fox

    Department of Cell Biology, Duke University, Durham, United States
    For correspondence
    don.fox@duke.edu
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-0436-179X

Funding

National Institutes of Health (GM118447)

  • Donald T Fox

The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.

Reviewing Editor

  1. Bruce Edgar, University of Utah, United States

Publication history

  1. Received: May 12, 2018
  2. Accepted: August 16, 2018
  3. Accepted Manuscript published: August 17, 2018 (version 1)
  4. Version of Record published: September 10, 2018 (version 2)

Copyright

© 2018, Cohen et al.

This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.

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