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[The effect of Staphylococcus aureus vaccine on professional phagocytes in vitro and in vivo]
J Takácová1, D Kotulová, A Kasicková
1Oddelenie klinickej biochémie NsP, Levoci, Slovakia.
Abstract:
Effect of Staphylococcus aureus vaccine on metabolic and functional activities of polymorphonuclear leucocytes and guinea pig macrophages was observed. The tested vaccine following a short contact with human polymorphonuclear leucocytes isolated from peripheral blood inhibited candidacidal and phagocytic activities, whereas the phagocytic index stayed unchanged. The tested vaccine stimulated the INT-reductase activity and superoxide production, as well as extracellular liberation of lysosome enzymes from polymorphonuclear leucocytes. Application of the Staphylococcus aureus vaccine to guinea pigs 35, 30, 28, and 23 days prior to the acquirement of peritoneal macrophages, augmented, as compared to the control group, the amount of peritoneal macrophages and their phagocytic activity. Candidacidal and metabolic activities stayed unchanged. The results imply that the contact of phagocytic cells with the antigen, affects their biochemical and functional activities. Activities are dependent of the length of the period during which the antigen stimulation takes place, and of its quantity. Examination of phagocytes can be recommended for adjustment of both, vaccine doses and intervals between their individual applications. (Tab. 5, Ref. 19.).
Insights
Staphylococcus aureus vaccine impacts immune cell function. Short-term exposure inhibits some activities, while longer-term vaccination boosts macrophage numbers and phagocytic activity in guinea pigs.
Area of Science:
- Immunology
- Vaccinology
Context:
- Investigating the immunomodulatory effects of vaccines is crucial for understanding host-pathogen interactions.
- Polymorphonuclear leucocytes (PMNs) and macrophages are key phagocytic cells involved in innate immunity.
- Staphylococcus aureus infections pose significant public health challenges, necessitating effective vaccine strategies.
Purpose:
- To evaluate the impact of a Staphylococcus aureus vaccine on the metabolic and functional activities of human polymorphonuclear leucocytes and guinea pig macrophages.
- To determine how antigen exposure duration and quantity influence phagocytic cell responses.
Summary:
- In vitro, the vaccine transiently inhibited candidacidal and phagocytic activities of human PMNs but stimulated INT-reductase activity, superoxide production, and lysosome enzyme release.
- In vivo, vaccination of guinea pigs increased peritoneal macrophage count and phagocytic activity, while candidacidal and metabolic activities remained unchanged.
- These findings suggest that antigen contact duration and dose critically affect phagocyte biochemical and functional responses.
Impact:
- The study highlights the complex, dose- and time-dependent effects of Staphylococcus aureus vaccine components on innate immune cells.
- Results provide a basis for optimizing vaccine dosage and administration intervals for enhanced efficacy.
- Monitoring phagocyte activity could be a valuable tool for vaccine development and personalized immunization strategies.