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In vitro Cell Migration and Invasion Assays
Published on: June 1, 2014
A high-throughput migration assay reveals HER2-mediated cell migration arising from increased directional persistence
Neil Kumar1, Muhammad H Zaman, Hyung-Do Kim
1Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
Biophysical Journal
|June 20, 2006
Summary
Human epidermal growth factor receptor 2 (HER2) overexpression increases breast cancer cell invasiveness by enhancing directional persistence. This effect varies with HER2 activation, impacting cell speed differently based on ligand stimulation.
Area of Science:
- Oncology
- Cell Biology
- Biochemistry
Background:
- Human epidermal growth factor receptor 2 (HER2) overexpression is linked to aggressive breast cancer.
- The precise impact of HER2 on cell migration dynamics, including speed and persistence, remains unclear.
- Differential effects of HER2 heterodimerization partners (EGFR vs. HER3) on cell migration are unstudied.
Purpose of the Study:
- To investigate how HER2 overexpression influences cell migration properties like speed and directional persistence.
- To determine the differential effects of HER2 activation via EGFR versus HER3 on cell migration.
- To elucidate the role of HER2-mediated cell migration in breast cancer invasiveness.
Main Methods:
- Developed a high-throughput wound closure assay for quantifying individual cell locomotion and closure kinetics.
- Utilized human mammary epithelial cells with varying HER2 levels.
- Stimulated cells with epidermal growth factor (EGF) or heregulin (a HER3 ligand).
Main Results:
- Increased HER2 levels elevated wound closure, with kinetics dependent on ligand treatment.
- Cell speed increased with HER2 under EGF but decreased under heregulin.
- Directional persistence significantly increased with HER2 levels under both EGF and heregulin treatments.
- Enhanced persistence quantitatively explained increased wound closure, measured by effective diffusion.
Conclusions:
- HER2 overexpression modulates cell migration through differential control of speed and persistence, influenced by EGFR-HER2 or HER2-HER3 heterodimerization.
- Increased directional persistence associated with HER2 overexpression provides a potential mechanism for the invasiveness observed in HER2-positive breast tumors.
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