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Effects of pefloxacin on phagocytosis function of rat macrophages and polymorphonuclear leucocytes
Abstract:
The influence of pefloxacin on polymorphonuclear leucocytes (PMN) and alveolar macrophages (AM) phagocytosis and microbicidal activity was studied. Phagocytes were collected from Sprague-Dawley rats, mixed with pefloxacin at different concentrations (1, 10, 100 mg/l) and a yeast phagocytosis assay was performed. Three parameters were measured, the phagocytic capacity (number of live and dead yeast/100 cells), the phagocytic activity (number of cells containing 2 or more yeast/100 cells) and the microbicidal activity or % killed (Formula: see text) Both low and high concentrations of pefloxacin increased significantly the phagocytic capacity and activity of AM and PMN. The increase of the AM phagocytic capacity and activity seen with increasing levels of extracellular pefloxacin was not statistically significant. Pefloxacin showed no adverse effect on the microbicidal activity of AM and PMN.
Insights
Pefloxacin significantly enhanced the phagocytic capacity and activity of polymorphonuclear leucocytes (PMN) and alveolar macrophages (AM) in rats. This fluoroquinolone antibiotic did not adversely affect the microbicidal activity of these immune cells.
Area of Science:
- Immunology
- Pharmacology
- Microbiology
Background:
- Polymorphonuclear leucocytes (PMN) and alveolar macrophages (AM) are critical immune cells involved in pathogen clearance.
- Understanding the impact of antibiotics on immune cell function is essential for optimizing treatment strategies.
- Pefloxacin is a fluoroquinolone antibiotic with known antimicrobial properties.
Purpose of the Study:
- To investigate the effect of pefloxacin on the phagocytic and microbicidal activities of rat PMN and AM.
- To determine if pefloxacin influences the capacity and activity of these phagocytes against yeast.
- To assess any potential adverse effects of pefloxacin on the immune cell's killing ability.
Main Methods:
- Phagocytes (PMN and AM) were isolated from Sprague-Dawley rats.
- Cells were incubated with varying concentrations of pefloxacin (1, 10, 100 mg/l).
- A yeast phagocytosis assay was conducted, measuring phagocytic capacity, phagocytic activity, and microbicidal activity.
Main Results:
- Pefloxacin significantly increased both phagocytic capacity and activity of AM and PMN at low and high concentrations.
- The enhancement of AM phagocytic capacity and activity with increasing extracellular pefloxacin levels was not statistically significant.
- Pefloxacin demonstrated no adverse effects on the microbicidal activity of AM and PMN.
Conclusions:
- Pefloxacin enhances the phagocytic functions of key immune cells, PMN and AM.
- The study suggests pefloxacin may augment innate immune responses without compromising microbial killing.
- These findings highlight a potential immunomodulatory role of pefloxacin in host defense mechanisms.