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Intestinal stem cells lacking the Math1 tumour suppressor are refractory to Notch inhibitors

Johan H van Es1, Natalie de Geest, Maaike van de Born

  • 1Hubrecht Institute for Developmental Biology and Stem Cell Research and University Medical Centre Utrecht, Uppsalalaan 8, Utrecht 3584CT, Netherlands.

Nature Communications
|October 27, 2010
PubMed

Insights

Inhibition of Notch signaling causes intestinal stem cells to convert into goblet cells, a process dependent on the transcription factor Math1. This finding clarifies the genetic hierarchy in intestinal cell differentiation.

Area of Science:

  • Gastroenterology
  • Cell Biology
  • Developmental Biology

Background:

  • Intestinal epithelial cells regenerate from stem cells, undergoing proliferation and differentiation.
  • Notch signaling and the transcription factor Math1 are crucial for intestinal cell fate determination and homeostasis.
  • Deregulation of these pathways is implicated in intestinal cancers.

Purpose of the Study:

  • To elucidate the genetic hierarchy governing intestinal stem cell differentiation into secretory cells.
  • To investigate the role of Math1 in the context of Notch signaling inhibition.

Main Methods:

  • Utilized pharmacological inhibition of Notch signaling via gamma-secretase inhibitors.
  • Employed genetic inactivation of the Notch signaling pathway.
  • Assessed the requirement of Math1 for stem cell conversion into goblet cells.

Main Results:

  • Inhibition of Notch signaling leads to the loss of proliferating crypt progenitors.
  • These progenitors convert into post-mitotic goblet cells upon Notch pathway blockade.
  • This conversion is critically dependent on the presence and function of Math1.

Conclusions:

  • Math1 is essential for the conversion of intestinal stem cells into goblet cells when Notch signaling is inhibited.
  • Establishes a key regulatory step in the differentiation pathway controlled by Math1 and Notch.
  • Provides insights into mechanisms underlying intestinal homeostasis and neoplastic transformation.

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