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Related Concept Videos

Immunoglobulin-like Cell Adhesion Molecules01:31

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Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
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Cell adhesion molecules (CAMs) are pivotal to multicellularity and the coordinated functioning of tissues and organ systems. They enable physical interactions between cells and provide mechanical strength to tissues. They also function as receptors for signal transmission across the plasma membrane. The CAMs are broadly classified into four families - integrins, cadherins, selectins, and immunoglobulin-like CAMs (IgCAMs).
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Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types –  adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as  epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as  heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
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Static Adhesion Assay for the Study of Integrin Activation in T Lymphocytes
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Cell-cell adhesion in the immune system.

G I Bell1

  • 1Theoretical Division, University of California, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.

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Summary
This summary is machine-generated.

Cell adhesion is crucial for immune system regulation, involving direct physical contact. This review highlights adhesion mediated by specific cell-surface receptors and ligands, even when receptors are unidentified.

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Area of Science:

  • Immunology
  • Cell Biology
  • Biochemistry

Background:

  • Cell-cell interactions are fundamental to immune system function and regulation.
  • These interactions occur via soluble factors (e.g., immunoglobulins, interleukins) or direct cell-cell adhesion.
  • Cell adhesion plays a critical role in immune cell communication and coordination.

Purpose of the Study:

  • To review the mechanisms of cell adhesion in the immune system.
  • To emphasize the role of specific cell-surface receptors and ligands in mediating cell adhesion.
  • To discuss instances where cell adhesion occurs without identified receptors.

Main Methods:

  • Literature review focusing on cell adhesion mechanisms in immunology.
  • Analysis of studies involving specific cell-surface receptors and ligands.
  • Examination of cases where receptor identity is inferred from interaction specificity.

Main Results:

  • Cell adhesion is a key mode of immune cell interaction, complementing soluble factor-mediated communication.
  • Specific cell-surface receptors and ligands are central to mediating immune cell adhesion.
  • The specificity of cell interactions can imply the presence of receptors even when they are not biochemically characterized.

Conclusions:

  • Cell adhesion, mediated by specific molecular interactions, is vital for immune system processes.
  • Understanding these adhesion mechanisms, including those with inferred receptors, is essential for comprehending immune regulation.
  • Further research into unidentified receptors involved in cell adhesion may reveal novel immune pathways.