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Optimizing the Genetic Incorporation of Chemical Probes into GPCRs for Photo-crosslinking Mapping and Bioorthogonal Chemistry in Live Mammalian Cells
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The AXL Receptor is a Sensor of Ligand Spatial Heterogeneity

Aaron S Meyer1, Annelien J M Zweemer1, Douglas A Lauffenburger1

  • 1Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge MA 02139 ; Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge MA 02139.

Cell Systems
|August 4, 2015
PubMed

Insights

The AXL receptor tyrosine kinase (RTK) plays a role in inflammation and cancer. This study reveals AXL senses ligand concentration through reaction-diffusion, offering new therapeutic targets.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Systems Biology

Background:

  • AXL receptor tyrosine kinase (RTK) is implicated in inflammation and cancer progression.
  • AXL overexpression contributes to drug resistance and tumor dissemination in solid tumors.
  • Existing knowledge on Gas6-AXL signaling lacks mechanistic detail regarding activation.

Purpose of the Study:

  • To elucidate the detailed, mechanistic picture of AXL activation.
  • To understand how ligand-receptor interactions influence AXL signaling.
  • To provide insights for designing targeted AXL therapeutics.

Main Methods:

  • Integration of quantitative experimental data.
  • Application of mathematical modeling approaches.
  • Analysis of reaction-diffusion interactions.

Main Results:

  • AXL functions by sensing local spatial heterogeneity in ligand concentration.
  • This sensing mechanism is driven by complex reaction-diffusion interactions.
  • AXL activation mechanism differs from other receptor tyrosine kinase families.

Conclusions:

  • AXL's distinct activation mechanism is crucial for its physiological roles in inflammation.
  • Understanding AXL's unique signaling provides a vital insight for developing targeted therapies.
  • This research paves the way for novel AXL-targeted therapeutic interventions.

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