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The Three-Dimensional Human Skin Reconstruct Model: a Tool to Study Normal Skin and Melanoma Progression
Published on: August 3, 2011
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αvβ3 integrin expression increases elasticity in human melanoma cells.
Leda Lacaria1, Janina R Lange2, Wolfgang H Goldmann2
1Aix Marseille Univ, CNRS, INSERM, LAI, Marseille, France.
Biochemical and Biophysical Research Communications
|March 14, 2020
Summary
AlphaVbeta3 integrin expression enhances melanoma cell stiffness. Replacing it with AlphaIIbbeta3 integrin alters stiffness based on cell adhesion conditions, impacting cellular mechanics.
Area of Science:
- Cellular mechanics
- Biophysics
- Integrin signaling
Background:
- Cells interact with the extracellular matrix (ECM) via mechano-transduction.
- Integrins are key mediators connecting the ECM to the cytoskeleton.
- Cellular mechanical properties are influenced by cytoskeletal rearrangements.
Purpose of the Study:
- To investigate the role of alphaVbeta3 integrin in regulating human melanoma cell mechanics.
- To understand how alphaVbeta3 integrin expression affects cell stiffness and deformability.
- To compare the mechanical influence of alphaVbeta3 and alphaIIbbeta3 integrins.
Main Methods:
- Atomic force microscopy (AFM) was used to measure cell mechanical properties.
- Micro-constriction assays were employed to assess cell deformability.
- Human melanoma M21 cells with varying integrin expression were analyzed.
Main Results:
- AlphaVbeta3 integrin expression significantly increased melanoma cell stiffness in both adherent and non-adherent states.
- Substituting alphaVbeta3 with alphaIIbbeta3 integrin resulted in increased stiffness in adherent cells but decreased stiffness in non-adherent cells.
- AlphaVbeta3-mediated cell stiffening persisted upon adhesion to fibronectin, independent of fibronectin concentration.
Conclusions:
- AlphaVbeta3 integrin plays a crucial role in determining melanoma cell mechanical properties.
- The specific integrin subtype influences cell mechanics differently depending on adhesion context.
- Findings provide insights into integrin-mediated regulation of cellular mechanics in health and disease.
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