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Cell adhesion molecules in invertebrate immunity.

M W Johansson1

  • 1Department of Comparative Physiology, Evolutionary Biology Center, Uppsala University, Sweden. mats.johansson@fysbot.uu.se

Developmental and Comparative Immunology
|July 30, 1999
PubMed
Summary

Cell adhesion molecules are crucial for invertebrate immunity, mediating essential functions like encapsulation. Research highlights peroxinectin and integrins as key players in crayfish and other arthropod immune responses.

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Area of Science:

  • Invertebrate Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Cell adhesion is vital for invertebrate immune responses, including encapsulation and nodule formation.
  • Specific cell adhesion molecules (CAMs) are implicated in these processes.

Purpose of the Study:

  • To review cell adhesion molecules involved in invertebrate immunity.
  • To explore the role of peroxinectin and integrins in crayfish immunity.
  • To investigate conserved mechanisms of cell adhesion in immunity across species.

Main Methods:

  • Review of existing literature on invertebrate immune cell adhesion.
  • Analysis of the function of crayfish peroxinectin and its binding interactions.
  • Examination of the effects of RGD peptides on invertebrate blood cell adhesion.

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Main Results:

  • Crayfish blood cells release peroxinectin, a cell-adhesive and opsonic peroxidase.
  • Peroxinectin's KGD motif binds to integrin receptors on blood cells.
  • The peroxidase-integrin interaction is conserved, with human myeloperoxidase showing similar function.
  • Integrins mediate blood cell adhesion and cellular immunity in diverse invertebrates.
  • Other molecules like insect plasmatocyte-spreading peptide and hemolin are also involved in invertebrate cell adhesion.

Conclusions:

  • Cell adhesion molecules, particularly integrins and peroxinectin-like proteins, play a conserved and essential role in invertebrate cellular immunity.
  • These molecules facilitate crucial immune functions such as encapsulation and nodule formation.
  • Understanding these mechanisms provides insights into the evolution of immune systems.