Extrapolation for a pharmacokinetic model for acetaminophen from adults to neonates: A Latin Hypercube Sampling...

Area of Science:

• Pharmacology
• Computational Biology
• Pediatrics

Background:

• Extrapolating pharmacokinetic (PK) models from adults to neonates requires adjusting physiological and drug-specific parameters.
• Acetaminophen (APAP) PK models need refinement for neonatal populations due to developmental changes.

Purpose of the Study:

• To present a parameter analysis method, Latin Hypercube Sampling (LHS), for an acetaminophen (APAP) PK model extrapolated to neonates.
• To investigate the interplay of physiological and drug-specific parameters in neonatal APAP PK.

Main Methods:

• Developed a two-compartment (blood, urine) APAP PK model with Michaelis-Menten kinetics.
• Scaled physiological parameters using allometric laws and adjusted APAP-specific parameters for neonatal enzymatic maturation.
• Applied the LHS method for statistical parameter analysis.

Main Results:

• The extrapolated APAP PK model demonstrated consistency with published neonatal data.
• The sulphation clearance parameter was identified as crucial for the neonatal PK model.
• The influence of sulphation clearance was diminished when volume of distribution parameters were considered.

Conclusions:

• The LHS method is a valuable tool for in silico PK model extrapolation between different age groups.
• Accurate neonatal PK modeling requires careful adjustment of specific parameters like sulphation clearance and volume of distribution.
• This approach aids in predicting drug behavior in neonatal populations.