Strategy advancements in placental pharmacokinetics: from in vitro experiments to in silico prediction
Abstract
Background The placental barrier is a critical interface that regulates drug transport between maternal and fetal circulation and is an important component in assessing fetal drug-exposure risk. Since pregnant women are often excluded from clinical trials, pharmacokinetic (PK) analysis data on placental drug transport remain limited. Currently, in vitro experiments and in silico simulation strategies are the primary and effective means for understanding drug transport across the placenta. Method Various in vitro experimental methods, including cell monolayer models, ex vivo placental perfusion, and organ-on-a-chip platforms, along with model-based computational simulations, were systematically reviewed. The advantages, limitations, and potential future applications of these methods were evaluated. Result A total of seven studies using cell models, 28 employing ex vivo perfusion, six utilizing placenta-on-a-chip technology, and 39 focusing on in silico simulations, were identified, involving 8, 34, 5, and 42 drugs, respectively. Antiviral agents, antibiotics, and opioids were the most frequently investigated drug types. Overall, in silico simulations informed by in vitro data as baseline parameters and constraints demonstrated higher predictive accuracy. Integrating multi-model data was shown to be a reliable strategy for improving the precision of placental PK studies. Conclusion This review highlights the current strategies in placental PK research and supports safer drug…
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