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[Effect of several antibiotics and their combination with prodigiozan on Y. pestis EV, engulfed by macrophages]
Abstract:
The effect of various antibiotics, such as streptomycin, gentamicin, ampicillin, benzylpenicillin, tetracycline, chlortetracycline and levomycetin on the plague bacteria (strain Y. pestis EV) located inside the cells was studied. Peritoneal macrophages of albino mice with aceptic inflammation of the abdominal cavity caused by intraperitoneal administration of 2 ml of sterile meat-peptone broth were used in the experiments. The ratio of the macrophages and microbes was 1 : 50. A part of the mice were treated with prodigiozan 24 hours before taking the exudate. The preparations of the macrophages of albino mice with the microbes absorbed by them served as the control. The effect of the antibiotics and their combinations with prodigiozan was stimated by the coefficient of multiplication suppression against the control. The observations were made in dynamics. The studies showed that the macrophage activity of the mice treated with prodigiozan after exposure to the antibiotics was reliably higher than that in the control and digestion of the microbes located inside the cells started earlier, providing more complete phagocytosis.
Insights
Prodigiozan enhances antibiotic effectiveness against intracellular plague bacteria by boosting macrophage activity. This leads to earlier and more complete phagocytosis of Yersinia pestis within host cells.
Area of Science:
- Microbiology
- Immunology
- Pharmacology
Context:
- Intracellular pathogens like Yersinia pestis pose significant treatment challenges.
- Macrophage function is crucial for clearing bacterial infections.
- Antibiotic efficacy can be limited by intracellular bacterial survival.
Purpose:
- To investigate the impact of various antibiotics on intracellular Yersinia pestis.
- To evaluate the synergistic effect of prodigiozan with antibiotics on macrophage activity.
- To assess the modulation of phagocytosis and bacterial multiplication within macrophages.
Summary:
- This study examined the effects of streptomycin, gentamicin, ampicillin, benzylpenicillin, tetracycline, chlortetracycline, and levomycetin on plague bacteria (Y. pestis EV) within mouse peritoneal macrophages.
- Mice were treated with prodigiozan prior to antibiotic exposure to assess its influence on macrophage-mediated bacterial clearance.
- Antibiotic efficacy was evaluated by the coefficient of multiplication suppression, with observations made dynamically.
- Results indicated that prodigiozan treatment significantly enhanced macrophage activity, leading to earlier and more complete phagocytosis of intracellular Y. pestis compared to controls.
Impact:
- Demonstrates a potential strategy to improve antibiotic therapy for intracellular bacterial infections.
- Highlights the immunomodulatory role of prodigiozan in enhancing host defense mechanisms.
- Provides insights into optimizing treatment regimens for Yersinia pestis infections by combining antibiotics with immune stimulants.