Related Experiment Video
Updated: May 20, 2026
09:38
The Organoid Reconstitution Assay (ORA) for the Functional Analysis of Intestinal Stem and Niche Cells
Published on: November 20, 2017
Stem cell niches: famished Paneth cells, gluttonous stem cells.
Tae-Hee Kim1, Ramesh A Shivdasani
1Department of Medical Oncology and Center for Functional Cancer Epigenetics, Dana-Farber Cancer Institute, Boston, MA 02215, USA.
Current Biology : CB
|July 28, 2012
Summary
Caloric restriction in mice suppresses mTORC1 signaling in Paneth cells. This process enhances the proliferation of adjacent adult stem cells in the intestine.
Area of Science:
- Stem cell biology
- Gastrointestinal physiology
- Metabolism and aging
Background:
- Adult stem cells maintain tissue homeostasis and repair throughout life.
- Environmental factors, such as nutrient availability, can influence stem cell behavior.
- The mechanistic target of rapamycin complex 1 (mTORC1) pathway is a key regulator of cell growth and metabolism.
Purpose of the Study:
- To investigate the impact of caloric restriction on intestinal stem cell function.
- To elucidate the role of Paneth cells and mTORC1 signaling in mediating the effects of caloric restriction on stem cells.
Main Methods:
- Utilized a mouse model to study the intestinal stem cell niche.
- Employed genetic and pharmacological approaches to manipulate mTORC1 signaling in Paneth cells.
- Assessed stem cell proliferation and differentiation markers.
Main Results:
- Caloric restriction led to the repression of mTORC1 signaling specifically in Paneth cells.
- Reduced mTORC1 activity in Paneth cells promoted the proliferation of neighboring intestinal stem cells.
- Paneth cell-intrinsic signaling is crucial for stem cell response to dietary changes.
Conclusions:
- Dietary interventions like caloric restriction can modulate adult stem cell activity through specific cell types and signaling pathways.
- Targeting mTORC1 signaling in Paneth cells represents a potential strategy to influence intestinal stem cell dynamics and tissue regeneration.
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