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Quantitative Measurement of Invadopodia-mediated Extracellular Matrix Proteolysis in Single and Multicellular Contexts
Published on: August 27, 2012
Signaling inputs to invadopodia and podosomes
Daisuke Hoshino1, Kevin M Branch, Alissa M Weaver
1Department of Cancer Biology, Vanderbilt University Medical Center, 2220 Pierce Avenue, Nashville, TN 37232-6840, USA.
Journal of Cell Science
|July 12, 2013
Summary
Cellular invadopodia and podosomes are key for tissue remodeling. Growth factor signaling drives invadopodia formation, while adhesion signaling promotes proteinase release for matrix degradation.
Area of Science:
- Cell Biology
- Biochemistry
- Cancer Research
Background:
- Extracellular matrix (ECM) remodeling is vital for cell migration and tissue dynamics.
- Invadopodia (cancer cells) and podosomes (normal cells) are actin-rich structures specialized for ECM degradation.
- Recent research highlights the importance of growth factor and adhesion signaling in regulating these structures.
Purpose of the Study:
- To review current knowledge on upstream signaling pathways regulating invadopodia and podosomes.
- To elucidate the distinct roles of signaling inputs in different stages of invadopodia/podosome formation and function.
- To present a model integrating growth factor and adhesion signaling in invadopodia activity.
Main Methods:
- Literature review and synthesis of recent research findings.
- Analysis of signaling pathways including phosphoinositide 3-kinase (PI3K).
- Discussion of invadopodia as adhesion structures and their associated adhesion rings.
Main Results:
- Growth factor stimulation activates PI3K, promoting invadopodia formation.
- Adhesion signaling regulates the exocytosis of proteinases at invadopodia.
- Invadopodia-associated adhesion rings contribute to the maturation of invadopodia.
Conclusions:
- Signaling inputs differentially regulate invadopodia and podosomes.
- A coordinated model of growth factor and adhesion signaling is proposed for invadopodia-mediated invasion.
- Understanding these pathways is crucial for targeting cancer cell invasion.
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