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Updated: Aug 12, 2025
08:53
In Vitro Model Integrating Substrate Stiffness and Flow to Study Endothelial Cell Responses
Published on: July 19, 2024
583
Matrix stiffness regulates Notch signaling activity in endothelial cells
Maibritt Kretschmer1, Rose Mamistvalov2, David Sprinzak2
1Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 Munich, Germany.
Journal of Cell Science
|January 31, 2023
Summary
Cellular environment stiffness influences Notch signaling. Softer substrates increase Notch activity, impacting endothelial cell differentiation and potentially tumor growth.
Area of Science:
- Cell Biology
- Biophysics
- Developmental Biology
Background:
- Notch signaling is crucial for cell development and disease.
- Its mechanotransduction module regulates receptor cleavage.
- The impact of cellular environment biomechanics on Notch signaling remains unclear.
Purpose of the Study:
- To investigate how substrate stiffness affects Notch signaling in endothelial cells.
- To understand the role of biomechanical properties in Notch pathway regulation.
Main Methods:
- Utilized stiffness-tuned polydimethylsiloxane (PDMS) substrates.
- Examined Notch signaling pathway activity in endothelial cells.
- Analyzed trans-endocytosis and integrin cell-matrix connections.
Main Results:
- Notch signaling activity inversely correlates with substrate stiffness.
- Increased Notch activity was observed on softer substrates.
- Substrate stiffness regulates trans-endocytosis of the Notch extracellular domain and integrin connections.
Conclusions:
- Mechanotransduction of Notch activation is modulated by substrate stiffness.
- Substrate rigidity is a significant cue for Notch signaling.
- Findings suggest implications for diseases involving extracellular matrix stiffening, like tumor growth.
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