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Efficient Production and Purification of Recombinant Murine Kindlin-3 from Insect Cells for Biophysical Studies
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EMMPRIN regulates β1 integrin-mediated adhesion through Kindlin-3 in human melanoma cells

Julie Delyon1,2, Farah Khayati1, Ibtissem Djaafri1,3

  • 1INSERM UMR-S 976, Paris, France.

Experimental Dermatology
|March 27, 2015
PubMed

Insights

Extracellular matrix metalloproteinase inducer (EMMPRIN) regulates melanoma cell adhesion via β1 integrin and kindlin-3. EMMPRIN knockdown enhances cell adhesion and reduces invasion, revealing a new pathway in tumor cell migration.

Area of Science:

  • Oncology
  • Cell Biology
  • Biochemistry

Background:

  • Extracellular matrix metalloproteinase inducer (EMMPRIN) is implicated in tumor invasion via extracellular matrix (ECM) degradation.
  • Melanoma cell migration is a critical process in metastasis.

Purpose of the Study:

  • To investigate the role of EMMPRIN in regulating melanoma cell adhesion to the ECM.
  • To elucidate the molecular mechanisms underlying EMMPRIN's function in melanoma cell migration, focusing on interactions with β1 integrin and kindlin-3.

Main Methods:

  • EMMPRIN knockdown in human melanoma M10 cells using siRNA.
  • Assessment of cell invasion, adhesion, and spreading.
  • Analysis of actin cytoskeleton organization using phalloidin staining.
  • In situ proximity ligation assay and co-immunoprecipitation to study protein interactions.
  • Western blotting to evaluate protein and transcript levels of key molecules.
  • In vivo studies to validate findings.

Main Results:

  • EMMPRIN knockdown decreased melanoma cell invasion and increased cell adhesion and spreading, with morphological changes indicating enhanced actin organization.
  • EMMPRIN silencing promoted the interaction between β1 integrin and kindlin-3, leading to increased β1 integrin activation and decreased FAK phosphorylation.
  • EMMPRIN inversely regulated the expression of kindlin-3 and β1 integrin at both transcript and protein levels.
  • EMMPRIN did not affect talin expression or its interaction with β1 integrin.

Conclusions:

  • EMMPRIN plays a novel role in regulating melanoma cell migration by modulating cell adhesion through the β1 integrin/kindlin-3 pathway.
  • Targeting EMMPRIN may offer a therapeutic strategy to inhibit melanoma cell migration and invasion.
Keywords:
EMMPRINKindlin-3cell adhesionmelanomaβ1 integrin

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