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Related Experiment Videos

Selectins, T-cell rolling and inflammation

H Rossiter1, R Alon, T S Kupper

  • 1Division of Dermatology, Brigham and Women's Hospital, MA 02115, USA.

Molecular Medicine Today
|May 1, 1997
PubMed
Summary
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Selectins are Ca(2+)-dependent lectins mediating leukocyte rolling on inflamed vessels. Inhibiting selectin function offers anti-inflammatory potential but faces challenges due to complex biological processes.

Area of Science:

  • Cellular and Molecular Biology
  • Immunology
  • Biochemistry

Background:

  • Selectins are calcium-dependent lectins found on inflamed endothelium and leukocytes.
  • They mediate initial, reversible adhesive contacts crucial for leukocyte rolling under shear flow.
  • This rolling is a prerequisite for firm adhesion and extravasation during inflammatory responses.

Purpose of the Study:

  • To elucidate the structural basis of selectin-ligand interactions supporting cell rolling.
  • To explore the therapeutic potential of selectin inhibition in inflammatory conditions.
  • To identify challenges associated with targeting selectin pathways for anti-inflammatory therapy.

Main Methods:

  • Structural analysis of selectins and their ligands.
  • Biophysical studies of bond formation and dissociation dynamics.

Related Experiment Videos

  • Investigation of selectin function in cellular adhesion assays under flow conditions.

    • Main Results:

    • Selectin structure is optimized for transient bond dynamics essential for cell rolling.
    • Leukocyte rolling mediated by selectins precedes integrin-dependent firm arrest.
    • Selectin-mediated adhesion is critical for leukocyte recruitment to inflamed tissues.

    Conclusions:

    • Selectin-ligand interactions provide a unique mechanism for leukocyte rolling.
    • Targeting selectins presents a potential anti-inflammatory strategy.
    • The complexity of selectin-mediated processes poses challenges for therapeutic development.