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Quantifying the Mechanical Properties of the Endothelial Glycocalyx with Atomic Force Microscopy
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Localization of Galectins within Glycocalyx.

E M Rapoport1, V K Matveeva1, O A Vokhmyanina1

  • 1Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia.

Biochemistry. Biokhimiia
|September 10, 2018
PubMed
Summary
This summary is machine-generated.

Galectins, proteins involved in cell signaling, cluster in specific patches within the cell

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Area of Science:

  • Cell Biology
  • Glycobiology
  • Biochemistry

Background:

  • Galectins mediate crucial cellular processes like adhesion and signal transmission.
  • Understanding galectin localization within the glycocalyx is key to their functional activity.
  • The precise location and ligand interactions of galectins remain largely uncharacterized.

Purpose of the Study:

  • To investigate the localization of endogenous and exogenously introduced galectins within the cell's glycocalyx.
  • To determine if galectin distribution is uniform or clustered.
  • To elucidate the relationship between galectin patching and glycocalyx structure.

Main Methods:

  • Microscopy techniques to visualize galectin distribution.
  • Analysis of galectin localization relative to glycocalyx components.
  • Investigation of galectin association with specific cellular domains.

Main Results:

  • Galectins exhibit non-uniform, patchy distribution within the glycocalyx.
  • This patching arises from the inherent irregular distribution of glycans, not galectin cross-linking.
  • Galectins are primarily located in the inner glycocalyx zone, away from the cell membrane.
  • These galectin patches are independent of cell raft association.

Conclusions:

  • Galectin localization within the glycocalyx is dictated by underlying glycan architecture.
  • Galectins reside in the inner glycocalyx, suggesting specific functional microenvironments.
  • The findings provide new insights into galectin-cell surface interactions and signaling.