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Updated: Oct 3, 2025

Tension Gauge Tether Probes for Quantifying Growth Factor Mediated Integrin Mechanics and Adhesion
Published on: February 11, 2022
Dual clathrin and integrin signaling systems regulate growth factor receptor activation
Marco A Alfonzo-Méndez1, Kem A Sochacki1, Marie-Paule Strub1
1Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, 50 South Drive, Building 50, Bethesda, MD, 20892, USA.
Clathrin lattices organize growth factor and adhesion signals, linking epidermal growth factor receptor (EGFR) and β5-integrin. This crosstalk enhances cell signaling, impacting cancer progression and endocytosis.
Area of Science:
- Cell Biology
- Molecular Biology
- Cancer Research
Background:
- Crosstalk between growth factor and adhesion receptors is crucial for cell functions.
- Dysregulation of these receptors drives cancer progression.
- Spatial organization of growth and adhesion signals remains poorly understood.
Purpose of the Study:
- To elucidate the mechanism of spatial organization and integration of growth factor and adhesion signals.
- To investigate the role of clathrin lattices in coordinating receptor signaling.
- To understand the crosstalk between epidermal growth factor receptor (EGFR) and β5-integrin.
Main Methods:
- Quantitative fluorescence microscopy
- Electron microscopy
- Biochemical assays to study receptor interactions and signaling
Main Results:
- Flat clathrin lattices partition and activate growth factor signals.
- Ligand-activated EGFR, Grb2, Src, and β5-integrin are recruited to clathrin-coated structures.
- Clathrin structures form large plaques that link EGFR and β5-integrin via Src-mediated phosphorylation.
- Disruption of the EGFR/Src/β5-integrin axis inhibits clathrin plaque formation and receptor signaling.
Conclusions:
- Clathrin lattices provide a platform for integrating growth factor and adhesion signaling.
- Reciprocal regulation between clathrin and receptor systems enhances signaling.
- Findings have implications for understanding cancer, cell adhesion, and endocytosis.
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