Related Experiment Videos
Adenosine promotes neutrophil chemotaxis
F R Rose1, R Hirschhorn, G Weissmann
1Department of Medicine, New York University Medical Center, New York, New York 10016.
The Journal of Experimental Medicine
|March 1, 1988
Summary
Adenosine, via A2 receptors on neutrophils, surprisingly promotes cell migration to infection sites. This function aids tissue repair while preventing damage to healthy cells during inflammation.
Area of Science:
- Immunology
- Cell Biology
- Pharmacology
Background:
- Adenosine binding to neutrophil receptors inhibits toxic oxygen metabolite generation.
- Activated neutrophils can cause endothelial cell injury.
Purpose of the Study:
- Investigate adenosine's role in neutrophil chemotaxis.
- Determine the specific adenosine receptor subtype involved.
Main Methods:
- Modified Boyden chamber assay for chemotaxis.
- Checkerboard analysis and chemotaxis under agarose.
- Utilized adenosine receptor agonists and antagonists.
Main Results:
- Physiologic adenosine concentrations increased neutrophil chemotaxis by up to 60%.
- Agonist potency order (NECA > PIA ≥ adenosine) indicated A2 receptor involvement.
- An A2 antagonist reversed adenosine-mediated chemotaxis enhancement.
Conclusions:
- Neutrophil A2 adenosine receptor engagement promotes chemotaxis to chemoattractants.
- This mechanism may guide neutrophils to damaged tissue while sparing healthy cells.