Publications by authors named "R Greupink"

Most individuals use medication during pregnancy. However, decision making on antenatal pharmacotherapy presents considerable ethical and scientific challenges. Amid a sociocultural paradigm prioritising the elimination of fetal risks, available evidence and guidance are limited, and current decision making on antenatal drugs mostly proceeds in an ad-hoc and, often, biased manner.

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Article Synopsis
  • The study focuses on the role of the placenta in drug transport and nutrient transfer, identifying key transporters in human placenta and various cell lines.
  • Researchers found significant expression levels of transporters like P-gp, BCRP, MRP2, MRP4, and MRP6, with some notable differences between tissue and cell line models.
  • The findings suggest that proteomic analysis combined with a physiologically-based pharmacokinetic (PBPK) model can accurately predict fetal drug exposure and offers a standardized approach for future studies on maternal and fetal drug interactions.
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Medication use during pregnancy poses risks to both the mother and the fetus. These risks include an elevated potential for fetotoxicity due to placental drug transport. Nanomedicines offer a promising solution by potentially preventing trans-placental passage.

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Intestinal maturational changes after birth affect the pharmacokinetics (PK) of drugs, having major implications for drug safety and efficacy. However, little is known about ontogeny-related PK patterns in the intestine. To explore the accuracy of human enteroid monolayers for studying drug transport in the pediatric intestine, we compared the drug transporter functionality and expression in enteroid monolayers and tissue from pediatrics and adults.

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After oral administration, the intestine is the first site of drug absorption, making it a key determinant of the bioavailability of a drug, and hence drug efficacy and safety. Existing non-clinical models of the intestinal barrier in vitro often fail to mimic the barrier and absorption of the human intestine. We explore if human enteroid monolayers are a suitable tool for intestinal absorption studies compared to primary tissue (Ussing chamber) and Caco-2 cells.

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