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Induction of Mesenchymal-Epithelial Transitions in Sarcoma Cells
Published on: April 7, 2017
Matrix metalloproteinase-1 contribution to sarcoma cell invasion
Nandor Garamszegi1, Susanna P Garamszegi, Sean P Scully
1Sarcoma Biology Laboratory of Sylvester Comprehensive Cancer Center, University of Miami, Miller School of Medicine, FL, USA. ngaramszegi@med.miami.edu
Journal of Cellular and Molecular Medicine
|August 2, 2011
Summary
Matrix metalloproteinase-1 (MMP-1) is crucial for cancer cell invasion. Inhibiting its prenylation reduces MMP-1 delivery to cellular structures, decreasing invasiveness in sarcoma cells.
Area of Science:
- Biochemistry
- Cell Biology
- Oncology
Background:
- Matrix metalloproteinase-1 (MMP-1) activity is implicated in various diseases, including cancer progression.
- Discrepancies in MMP-1's role in tumorigenesis suggest a need to understand its production, trafficking, and activation.
- Regulation of MMP-1's directional delivery versus general secretion is poorly understood.
Purpose of the Study:
- To investigate the role of prenylation in MMP-1's directional delivery and cellular invasion.
- To elucidate the mechanisms regulating MMP-1 localization and activation in invasive sarcoma cells.
Main Methods:
- Inhibition of prenylation using farnesyl transferase inhibitor (FTI-276).
- RNA interference (RNAi) knockdown of MMP-1.
- Use of prenylation agonist farnesyl pyrophosphate (FPP).
- MMP-1-specific fluorogenic substrate, MMP1-Ds-Red fusion protein, and DQ-collagen degradation assays.
- MetaMorph analysis of cellular lamellipodia.
Main Results:
- FTI-276 decreased extracellular MMP-1 and reduced sarcoma cell invasiveness by 30%.
- MMP-1 knockdown confirmed its role in cellular invasiveness.
- FPP partially restored MMP-1 levels and invasion but transiently delayed podia distribution.
- FTI-276 inhibited MMP-1 formation and delivery to lamellipodia; FPP partially restored lamellipodia area.
Conclusions:
- MMP-1 directional delivery to cellular podia is essential for sarcoma cell invasion.
- This directional delivery and activation process is sensitive to prenylation inhibition.
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