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Purinergic Signaling During Immune Cell Trafficking
Davide Ferrari1, Eóin N McNamee2, Marco Idzko3
1Department of Life Science and Biotechnology, University of Ferrara, I-44100 Ferrara, Italy.
Immune cell trafficking relies on chemokines and purinergic signaling. Extracellular nucleotides like ATP are converted to adenosine, influencing immune cell movement during infection.
Area of Science:
- Immunology
- Cell Biology
- Biochemistry
Background:
- Immune cell migration is crucial for host defense against infection.
- Chemokines and their receptors are established regulators of immune cell trafficking.
- Emerging evidence highlights the role of purinergic signaling in immune cell movement.
Purpose of the Study:
- To review the role of purinergic signaling in immune cell trafficking.
- To integrate recent findings on nucleotide and adenosine signaling into classical models of inflammation.
Main Methods:
- Literature review of studies on purinergic signaling and immune cell trafficking.
- Analysis of mechanisms involving nucleotide release, receptor activation, and enzymatic conversion.
Main Results:
- Extracellular nucleotides (ATP, ADP) mediate autocrine and paracrine signaling via purinergic receptors.
- Ectoapyrases and nucleotidases convert nucleotides to adenosine, which also modulates leukocyte trafficking.
- Purinergic signaling complements chemokine-driven mechanisms in regulating immune cell positioning.
Conclusions:
- Purinergic signaling is a critical, multifaceted regulator of immune cell trafficking.
- Understanding purinergic pathways offers new therapeutic targets for inflammatory diseases.
- This review reconciles classical and novel concepts in immune cell migration.
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