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[Tobramycin concentrations in human renal tissue (author's transl)]
Infection
|January 1, 1979
Summary
Tobramycin concentrations in kidneys remain low initially but can accumulate with prolonged use. Damaged kidney tissue, particularly from inflammation, shows higher tobramycin levels.
Area of Science:
- Pharmacokinetics
- Nephrology
- Infectious Diseases
Context:
- Tobramycin is an aminoglycoside antibiotic commonly used for bacterial infections.
- Understanding drug distribution in target organs like the kidney is crucial for optimizing therapy and minimizing toxicity.
- Kidney tissue composition and pathological changes can influence drug accumulation.
Purpose:
- To investigate tobramycin concentrations in different regions of the human kidney (cortex and medulla).
- To assess tobramycin accumulation in renal parenchyma after short-term and prolonged administration.
- To compare tobramycin levels in normal, tumor-infiltrated, and chronically inflamed kidney tissues.
Summary:
- Kidney tissue (cortex and medulla) showed low tobramycin concentrations after one day of treatment in 20 patients.
- Significant tobramycin accumulation was observed in only one of three patients after several days of administration.
- Higher tobramycin concentrations were found in chronically inflamed renal parenchyma compared to normal or tumor-infiltrated kidney tissue, indicating increased accumulation in structurally damaged areas due to bacterial inflammation.
Impact:
- Provides insights into tobramycin distribution within the kidney, informing dosing strategies.
- Highlights the potential for increased drug accumulation in kidneys with pre-existing inflammatory damage.
- Suggests that renal inflammation may alter tobramycin pharmacokinetics, potentially impacting efficacy and safety in infected patients with compromised kidney function.