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Updated: Aug 12, 2026

Static Adhesion Assay for the Study of Integrin Activation in T Lymphocytes
Published on: June 13, 2014
Interleukin 4 and tumour necrosis factor alpha induce different adhesion pathways in endothelial cells for the
P Galéa1, Y Lebranchu, G Thibault
1Laboratoire d'Immunologie, CHU Bretonneau, Université de Tours, France.
Abstract:
We demonstrated that tumour necrosis factor alpha (TNF-alpha) and interleukin 4 (IL-4) increased endothelial cell (EC) adhesiveness for peripheral blood lymphocytes (PBL) by promoting transcription and protein synthesis. The different kinetics observed with TNF-alpha and IL-4 suggest the involvement of different adhesion molecules. Blocking adhesion assays and immunofluorescence analysis showed that PBL adhesion to endothelial cells involves different pair adhesion molecules. Whereas IL-4 promoted an LFA-1-dependent/ICAM-1-independent adhesion pathway on EC, TNF-alpha stimulated an LFA-1-dependent/ICAM-1-dependent adhesion pathway on EC. In contrast, VLA-4/VCAM-1 molecules were involved in PBL adhesion both to IL-4 and to TNF-alpha-stimulated EC. Finally, we found that a CD2-dependent/LFA-3-independent adhesion pathway was mainly involved in IL-4-stimulated EC.
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