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Stimulation of Cytoplasmic DNA Sensing Pathways In Vitro and In Vivo
Published on: September 18, 2014
Extracellular nucleotides as negative modulators of immunity
Francesco Di Virgilio1, Jean-Marie Boeynaems, Simon C Robson
1Department of Experimental and Diagnostic Medicine, Section of General Pathology, University of Ferrara, Italy. fdv@unife.it
Current Opinion in Pharmacology
|July 25, 2009
Summary
Extracellular nucleotides act as immune messengers, stimulating inflammation but also suppressing immunity. Chronic low levels impact immune responses, offering therapeutic targets for inflammatory diseases and cancer.
Area of Science:
- Immunology
- Cellular Biology
- Biochemistry
Background:
- Nucleotides are recognized as intracellular energy currency.
- Emerging evidence highlights nucleotides as crucial extracellular messengers in cellular communication.
- Their dual role in immune system modulation is increasingly appreciated.
Purpose of the Study:
- To elucidate the multifaceted roles of extracellular nucleotides in immune system regulation.
- To investigate the impact of chronic low extracellular nucleotide levels on inflammation.
- To explore the therapeutic potential of understanding nucleotide-mediated immune modulation.
Main Methods:
- Review of current literature on nucleotide signaling in immunology.
- Analysis of biochemical mechanisms underlying nucleotide-induced immune responses.
- Examination of the microenvironmental factors influencing nucleotide levels at inflammatory sites.
Main Results:
- Extracellular nucleotides function as pro-inflammatory mediators, stimulating lymphocyte proliferation, ROS generation, and cytokine/chemokine secretion.
- Nucleotides also exert immunosuppressive effects, acting as negative modulators of immunity.
- Chronic exposure to low extracellular nucleotide concentrations can significantly alter immune homeostasis and inflammation.
Conclusions:
- Extracellular nucleotides possess a complex, dual role in immunity, acting as both immune stimulants and depressants.
- The biochemical microenvironment at inflammatory sites dictates nucleotide-mediated immune outcomes.
- Targeting extracellular nucleotide signaling pathways may offer novel therapeutic strategies for inflammatory diseases and cancer.
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