Abstract
The migration of neutrophils into inflamed tissues is a fundamental component of innate immunity. A decisive step in this process is the polarized migration of blood neutrophils through endothelial cells (ECs) lining the venular lumen (transendothelial migration (TEM)) in a luminal-to-abluminal direction. By real-time confocal imaging, we found that neutrophils had disrupted polarized TEM ('hesitant' and 'reverse') in vivo. We noted these events in inflammation after ischemia-reperfusion injury, characterized by lower expression of junctional adhesion molecule C (JAM-C) at EC junctions, and they were enhanced by blockade or genetic deletion of JAM-C in ECs. Our results identify JAM-C as a key regulator of polarized neutrophil TEM in vivo and suggest that reverse TEM of neutrophils can contribute to the dissemination of systemic inflammation.
Original language | English |
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Pages (from-to) | 761-9 |
Number of pages | 9 |
Journal | Nature Immunology |
Volume | 12 |
Issue number | 8 |
DOIs | |
Publication status | Published - Aug 2011 |
Keywords
- Microscopy, Confocal
- Animals
- Neutrophils
- Mice
- Transendothelial and Transepithelial Migration
- Image Processing, Computer-Assisted
- Cell Adhesion Molecules
- Endothelium, Vascular
- Reperfusion Injury
- Inflammation
- Immunoglobulins