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Insights into selectin function from knockout mice

P S Frenette1, D D Wagner

  • 1Center for Blood Research, Boston, MA 02114, USA. frenette@cbr.med.harvard.edu

Thrombosis and Haemostasis
|July 1, 1997
PubMed
Summary
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Gene-targeted animal models revealed selectin roles in cell adhesion. Selectin deficiency studies inform potential anti-selectin therapies for human diseases.

Area of Science:

  • Immunology
  • Cell Biology
  • Biochemistry

Background:

  • Selectins mediate cell adhesion between endothelium, platelets, and leukocytes.
  • Understanding selectin function is crucial for inflammatory and immune responses.

Purpose of the Study:

  • To elucidate the specific roles of different selectins (P, E, and L-selectin) in leukocyte trafficking and adhesion using gene-targeted animal models.
  • To assess the potential of anti-selectin therapies by studying selectin-deficient mice in disease models.

Main Methods:

  • Generation and analysis of gene-targeted (knockout) mice lacking specific selectin genes.
  • Investigating leukocyte rolling and recruitment under inflammatory and non-inflammatory conditions.
  • Evaluating leukocyte extravasation and lymphocyte homing in selectin-deficient models.

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Main Results:

  • P-selectin mediates leukocyte rolling without inflammation; all three selectins contribute during inflammation.
  • P-selectin is key for early neutrophil recruitment, with others involved later.
  • Endothelial selectins (E-selectin) are vital for leukocyte homeostasis and extravasation, comparable to beta 2 integrins.

Conclusions:

  • Gene-targeted animal models are essential tools for dissecting selectin function in vivo.
  • Selectin-deficient mice provide critical insights into leukocyte trafficking and inflammatory processes.
  • These findings support the development of targeted anti-selectin therapies for various human diseases.