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[Interaction of antibiotics with leukocytes in children of various age groups]
Insights
Antibiotic binding to leukocytes decreases in children under five, particularly in polymorphonuclear cells. Understanding these age-related pharmacokinetic changes is crucial for effective pediatric chemotherapy.
Area of Science:
- Pharmacology and Therapeutics
- Cellular Biology
- Pediatrics
Context:
- Antibiotic efficacy relies on drug concentration at the infection site.
- Leukocytes play a role in drug distribution and host defense.
- Pediatric populations exhibit unique physiological differences impacting drug pharmacokinetics.
Purpose:
- To experimentally determine the binding indices of 21 antibiotics to human peripheral leukocytes across different pediatric age groups.
- To investigate age-dependent variations in antibiotic binding, specifically comparing newborns, toddlers (1-3 years), and young children (5-9 years).
- To analyze differential binding patterns between polymorphonuclear leukocytes and lymphocytes.
Summary:
- Antibiotic binding to human peripheral leukocytes was measured in children from birth to 9 years.
- A significant decrease in antibiotic binding was observed up to 5 years of age, more pronounced in polymorphonuclear leukocytes than lymphocytes.
- These findings highlight age-specific alterations in cellular drug pharmacokinetics during early childhood.
Impact:
- Results underscore the necessity of considering age-specific cell pharmacokinetic parameters in pediatric chemotherapy.
- Informed dosing strategies can optimize treatment outcomes for bacterial infections, especially those with intracellular pathogens.
- Provides foundational data for developing tailored antibiotic regimens for children.
Abstract:
The indices of binding of 21 currently used antibiotics to human peripheral leukocytes (the ratio of the cellular and extracellular concentrations) were determined experimentally in regard to various age periods, i.e. at the birth, from 1 to 3 years and from 5 to 9 years of the age. It was shown that during the period up to 5 years of the age the binding lowered, especially to the polymorphonuclear leukocytes and not so much to the lymphocytes. The different parameters of the cell pharmacokinetics in children should be taken into account in chemotherapy of bacterial infections with intracellular localization of the pathogen.