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Effect of gentamicin and sisomicin on the generation of superoxide by human monocytes
Abstract:
The effect of gentamicin and sisomicin on the generation of superoxide anions by human monocytes exposed to a phagocytosing stimulus, i.e. serum treated zymosan, or a soluble stimulus, i.e. 4-beta-phorbol-12-myristate-13-acetate, has been studied. Neither sisomicin nor gentamicin affected the superoxide production by stimulated monocytes. The data suggest that the reported variability in the response to aminoglycoside antibiotic therapy in certain clinical situations cannot be attributed to interference with monocyte oxidative burst.
Insights
Gentamicin and sisomicin did not alter superoxide anion generation in human monocytes stimulated by phagocytosis or soluble agents. This suggests aminoglycoside antibiotic therapy variability is not due to monocyte oxidative burst interference.
Area of Science:
- Immunology
- Pharmacology
- Microbiology
Background:
- Human monocytes play a crucial role in innate immunity through oxidative burst.
- Aminoglycoside antibiotics like gentamicin and sisomicin are used to treat bacterial infections.
- Variability in patient response to aminoglycosides is a clinical concern.
Purpose of the Study:
- To investigate the impact of gentamicin and sisomicin on superoxide anion generation by human monocytes.
- To determine if aminoglycosides interfere with the monocyte oxidative burst mechanism.
Main Methods:
- Human monocytes were stimulated using either serum-treated zymosan (phagocytic stimulus) or 4-beta-phorbol-12-myristate-13-acetate (soluble stimulus).
- Superoxide anion production by monocytes was measured in the presence and absence of gentamicin and sisomicin.
Main Results:
- Neither gentamicin nor sisomicin demonstrated any effect on superoxide anion production in stimulated human monocytes.
- The oxidative burst capacity of monocytes remained unaffected by the tested aminoglycoside antibiotics.
Conclusions:
- The study concludes that gentamicin and sisomicin do not interfere with the human monocyte oxidative burst.
- Findings suggest that observed clinical variability in aminoglycoside antibiotic therapy response is unlikely to stem from an impact on monocyte oxidative metabolism.