Recent developments in pharmacokinetic modeling of perfluorocarbon emulsions

Area of Science:

• Pharmacokinetics
• Biomedical Engineering
• Drug Delivery Systems

Background:

• Perfluorocarbon (PFC) emulsions are investigated as potential oxygen carriers.
• Understanding PFC emulsion distribution and elimination is crucial for their therapeutic applications.

Purpose of the Study:

• To develop and evaluate pharmacokinetic compartment and physiologically based models for PFC emulsions.
• To correlate PFC emulsion distribution in blood, RES, and non-RES tissues with excretion data.
• To provide insights into physiological mechanisms governing PFC disposition.

Main Methods:

• Utilized nonlinear regression analysis with PCNONLIN software.
• Evaluated models using expiration data from animal studies following intravenous injection of perflubron emulsion.
• Developed a four-compartment model representing PFC emulsion in blood, RES tissues, non-RES tissues, and solubilized PFC.

Main Results:

• A four-compartment model met mathematical and physical criteria for describing PFC emulsion pharmacokinetics.
• Physiological modeling elucidated mechanisms of PFC distribution and identified relationships between model and physiological parameters.
• The models demonstrated utility in predicting PFC disposition and enabling interspecies scaling.

Conclusions:

• Pharmacokinetic and physiologically based models are effective tools for understanding PFC emulsion behavior.
• These models provide valuable insights for predicting PFC disposition and supporting the development of PFC-based oxygen carriers.
• The developed models can be applied to various applications requiring prediction of drug or substance disposition in the body.