A new twist to the leukocyte adhesion cascade: intimate cooperation is key.
Leukocyte migration from blood into lymphoid and non-lymphoid tissues requires a highly orchestrated series of adhesive and signaling events. A network of adhesion molecules with overlapping functions mediate the capture, rolling and firm adhesion of leukocytes to the vascular endothelium. A new study adds a novel twist to this paradigm by demonstrating that two adhesion molecules, CD44 and VLA-4, must be physically associated with each other on activated T cells to mediate efficient rolling and firm adhesion.
Steeber, DA; Venturi, GM; Tedder, TF
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