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Static Adhesion Assay for the Study of Integrin Activation in T Lymphocytes
09:14

Static Adhesion Assay for the Study of Integrin Activation in T Lymphocytes

Published on: June 13, 2014

The human neural cell adhesion molecule L1 functions as a costimulatory molecule in T cell activation

L B Balaian1, T Moehler, A M Montgomery

  • 1Stem Cell Laboratory, University of California San Diego, La Jolla, USA.

European Journal of Immunology
|March 31, 2000
PubMed

Insights

Neural cell adhesion molecule L1 (also known as L1) acts as a costimulatory molecule in T cell activation. Blocking L1 function inhibits T cell responses, suggesting L1 as a potential target for immunotherapy.

Area of Science:

  • Neuroscience
  • Immunology
  • Cell Biology

Background:

  • L1 is a neural cell adhesion molecule (CAM) crucial for neurological development.
  • L1 expression has been observed in antigen-presenting cells of myelomonocytic origin, extending beyond its known neural roles.

Purpose of the Study:

  • To investigate the functional role of L1 in T cell activation.
  • To determine if L1 acts as a costimulatory molecule in immune responses.

Main Methods:

  • Utilized monoclonal antibodies to block L1-L1 homophilic binding.
  • Assessed mixed leukocyte responses involving L1+ dendritic cells.
  • Examined autologous T cell activation in response to phytohemagglutinin.
  • Transfected a murine myeloma cell line with human L1 to evaluate T cell stimulation capacity.

Main Results:

  • Blocking L1-L1 homophilic binding significantly reduced T cell responses mediated by allogeneic L1+ dendritic cells.
  • Inhibition of L1 function impaired autologous T cell activation.
  • Transfection of L1 enhanced the ability of cells to stimulate xenogeneic T cell responses.

Conclusions:

  • L1 functions as a costimulatory molecule in T cell activation.
  • L1 represents a potential novel target for immunotherapeutic interventions.
  • L1 may play a significant role in neuroimmunological processes and diseases.

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