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Updated: Mar 21, 2026

Real-time Bioluminescence Imaging of Notch Signaling Dynamics during Murine Neurogenesis
Published on: December 12, 2019
Notch signalling regulates asymmetric division and inter-conversion between lgr5 and bmi1 expressing intestinal stem
Tara Srinivasan1, Elaine Bich Than2, Pengcheng Bu1,3
1Department of Biomedical Engineering, Cornell University, Ithaca, New York, 14853, USA.
NOTCH signaling controls intestinal stem cell (ISC) plasticity by regulating the balance between fast-cycling LGR5+ and slow-cycling BMI1+ cells. This pathway promotes interconversion and asymmetric division, crucial for tissue regeneration.
Area of Science:
- Stem cell biology
- Gastrointestinal biology
- Cell signaling
Background:
- Intestinal stem cells (ISCs) drive tissue regeneration.
- Two main ISC populations exist: rapidly cycling LGR5+ cells and slow-cycling BMI1+ cells.
- Interconversion between these ISC pools is known but poorly understood.
Purpose of the Study:
- To investigate the role of NOTCH signaling in regulating ISC population balance.
- To elucidate the mechanism of interconversion between LGR5+ and BMI1+ ISCs.
- To understand ISC plasticity in response to inflammation.
Main Methods:
- In vitro and in vivo mouse models.
- Manipulation of NOTCH signaling pathways.
- Analysis of ISC populations (LGR5+ and BMI1+).
- Assessment of cell division patterns.
Main Results:
- NOTCH signaling modulates the ratio of BMI1+ to LGR5+ ISCs.
- NOTCH suppression decreases the BMI1+/LGR5+ ISC ratio.
- NOTCH stimulation increases the BMI1+/LGR5+ ISC ratio.
- NOTCH signaling promotes asymmetric ISC division during inflammation.
Conclusions:
- NOTCH signaling is a key regulator of ISC plasticity.
- NOTCH signaling mediates direct interconversion between slow- and fast-cycling ISCs.
- Asymmetric division is a mechanism for ISC interconversion regulated by NOTCH.
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