Effect of some anti-inflammatory drugs on FMLP-induced chemotaxis and random migration of rat polymorphonuclear leucocytes
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Abstract:
The effect of indomethacin, acetyl salicylic acid and niflumic acid on the chemotaxis and random migration of rat polymorphonuclear leucocytes (PMN) was investigated with a modified Boyden chamber technique under various experimental conditions (two cell sources, administration of drugs in vivo or incubation in vitro, modulation of antichemotactic activity of sera obtained from animals with inflammatory reactions). Indomethacin and niflumic acid inhibited the chemotactic responsiveness of cells collected from the rat pleural cavity after induction of two types of acute inflammatory reactions. This action was dose-dependent and appeared after either in vivo administration of the drug or in vitro incubation of the cells with various concentrations of the drug. However, random migration was not significantly modified and acetyl salicylic acid had no effect under any of the conditions. The same drugs, acetyl salicylic excepted, inhibited the antichemotactic activity exhibited by sera obtained from animals with inflammatory reactions.
Insights
Indomethacin and niflumic acid inhibit polymorphonuclear leucocytes (PMN) chemotaxis, but not random migration. These drugs also reduce the anti-chemotactic activity of inflammatory sera.
Area of Science:
- Immunology
- Pharmacology
Background:
- Non-steroidal anti-inflammatory drugs (NSAIDs) are widely used.
- Their effects on immune cell function, particularly polymorphonuclear leucocytes (PMN), require detailed investigation.
- Understanding PMN migration is crucial in inflammatory and immune responses.
Purpose of the Study:
- To investigate the impact of indomethacin, acetyl salicylic acid, and niflumic acid on rat PMN chemotaxis and random migration.
- To assess the influence of drug administration route (in vivo vs. in vitro).
- To evaluate the modulation of anti-chemotactic serum activity by these NSAIDs.
Main Methods:
- Modified Boyden chamber technique used to assess PMN chemotaxis and random migration.
- Experiments conducted with PMN from different rat sources.
- Drugs administered either in vivo or in vitro.
- Analysis of sera from rats with induced inflammatory reactions.
Main Results:
- Indomethacin and niflumic acid significantly inhibited PMN chemotactic responsiveness in a dose-dependent manner.
- Inhibition occurred with both in vivo and in vitro drug administration.
- Random migration of PMN was not significantly affected by these drugs.
- Acetyl salicylic acid showed no effect on PMN migration or chemotaxis.
- Indomethacin and niflumic acid reduced the anti-chemotactic activity of inflammatory sera.
Conclusions:
- Indomethacin and niflumic acid selectively impair PMN chemotaxis, suggesting a role in modulating inflammatory cell recruitment.
- These NSAIDs may interfere with inflammatory signaling pathways affecting PMN migration.
- The observed effects on anti-chemotactic sera warrant further study into their immunomodulatory potential.