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Ribavirin inhibits mast cell mediator release
The Journal of Pharmacology and Experimental Therapeutics
|January 1, 1987
Summary
Ribavirin, an antiviral drug, was investigated for its effects on mast cell functions. Chronic exposure to ribavirin inhibits mast cell mediator release, suggesting potential antiallergic properties.
Area of Science:
- Immunology
- Pharmacology
Background:
- Ribavirin is an antiviral agent and guanosine analog with known immunomodulatory effects.
- Its impact on immediate hypersensitivity reactions and mast cell function is largely uncharacterized.
- Purine metabolism is implicated in mast cell secretion.
Purpose of the Study:
- To investigate the effects of ribavirin on mouse bone marrow-derived mast cell functions.
- To determine if ribavirin influences mast cell mediator release and intracellular calcium levels.
Main Methods:
- Mast cells were cultured with varying concentrations of ribavirin (1-20 microM) for 1-7 days.
- Stimulation of mast cells was performed using A23187 or specific antigen.
- Mediator release (beta-hexosaminidase, leukotriene C4) and intracellular calcium concentrations were measured.
Main Results:
- Acute ribavirin exposure during stimulation did not affect mediator release.
- Chronic ribavirin treatment (1-20 microM) dose- and time-dependently inhibited stimulated beta-hexosaminidase and leukotriene C4 release.
- Ribavirin treatment reduced intracellular calcium concentration in antigen-challenged mast cells without affecting cell growth or mediator content.
Conclusions:
- In vitro chronic ribavirin exposure inhibits mast cell secretory processes.
- Ribavirin demonstrates potential as an antiallergic agent, though its mechanism requires further elucidation.