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Chemokines in rapid leukocyte adhesion triggering and migration
Brent Johnston1, Eugene C Butcher
1Laboratory of Immunology and Vascular Biology, Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305-5324, USA. wbjohnst@stanford.edu
Seminars in Immunology
|April 30, 2002
Summary
Chemokines, signaling proteins, guide leukocyte movement from blood to tissues. They control immune cell adhesion, migration, and homing, crucial for tissue-specific immunity and inflammation.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- Leukocyte recruitment to tissues is a multi-step process involving adhesion and activation.
- Chemokines (chemotactic cytokines) are key regulators of leukocyte trafficking.
- These cytokines signal via G-protein-coupled receptors, influencing immune cell behavior.
Purpose of the Study:
- To elucidate the critical roles of chemokines in leukocyte recruitment.
- To understand how chemokines regulate leukocyte adhesion and migration.
- To highlight the importance of chemokine and receptor expression in immune cell homing and inflammation.
Main Methods:
- Analysis of leukocyte recruitment pathways.
- Investigation of chemokine interactions with endothelial cells and leukocytes.
- Study of chemokine receptor signaling.
Main Results:
- Chemokines immobilize on endothelial cells, activating specific leukocyte subsets.
- Activation signals upregulate integrin affinity/avidity, leading to firm leukocyte adhesion.
- Chemokines direct leukocyte migration across endothelium and into tissues.
Conclusions:
- Chemokines are essential for leukocyte recruitment, adhesion, and migration.
- Regulated chemokine and receptor expression dictates lymphocyte homing.
- Chemokines control tissue-specific immunity and inflammatory responses.