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Ins and outs of LFA-1
M Lub1, Y van Kooyk, C G Figdor
1University Hospital Nijmegen, The Netherlands.
Insights
Leukocyte function-associated molecule 1 (LFA-1) integrins mediate immune cell adhesion and intracellular signaling. This review models LFA-1
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- Leukocyte function-associated molecule 1 (LFA-1) is a key integrin in immune responses.
- LFA-1 mediates crucial cell-cell interactions.
- Integrins exhibit bidirectional signaling capabilities.
Purpose of the Study:
- To discuss the 'inside-out' and 'outside-in' signaling of LFA-1.
- To highlight LFA-1's role in normal and malignant T cells.
- To present a model for LFA-1 regulation.
Main Methods:
- Literature review and data integration.
- Discussion of signaling pathways.
- Conceptual modeling.
Main Results:
- LFA-1 exhibits dual signaling functions: mediating adhesion and intracellular events.
- Cytoskeletal interactions are critical for LFA-1 regulation.
- Understanding LFA-1 signaling is vital for T cell function.
Conclusions:
- LFA-1 is a prototype integrin with complex bidirectional signaling.
- The cytoskeleton plays a pivotal role in modulating LFA-1 activity.
- This model provides insights into T cell immunology and potential therapeutic targets.
Abstract:
Leukocyte function-associated molecule 1 (LFA-1) is an integrin that plays a major role in the immune system. Recent findings demonstrate that LFA-1 has a two-way signaling function, mediating cell adhesion and stimulating intracellular processes at the same time. Here, Marijke Lub, Yvette van Kooyk and Carl Figdor discuss the 'inside-out' and 'outside-in' signaling properties of LFA-1, as a prototype leukocyte integrin, in normal and malignant T cells. They integrate data into a model that highlights the role of the cytoskeleton in the regulation of LFA-1.