TY - JOUR T1 - Proteomic Analysis of the Developmental Trajectory of Human Hepatic Membrane Transporter Proteins in the First Three Months of Life JF - Drug Metabolism and Disposition JO - Drug Metab Dispos SP - 1005 LP - 1013 DO - 10.1124/dmd.115.068577 VL - 44 IS - 7 AU - Miriam G. Mooij AU - Evita van de Steeg AU - Joost van Rosmalen AU - Jonathan D. Windster AU - Barbara A.E. de Koning AU - Wouter H. J. Vaes AU - Bianca D. van Groen AU - Dick Tibboel AU - Heleen M. Wortelboer AU - Saskia N. de Wildt Y1 - 2016/07/01 UR - http://dmd.aspetjournals.org/content/44/7/1005.abstract N2 - Human hepatic membrane-embedded transporter proteins are involved in trafficking endogenous and exogenous substrates. Even though impact of transporters on pharmacokinetics is recognized, little is known on maturation of transporter protein expression levels, especially during early life. We aimed to study the protein expression of 10 transporters in liver tissue from fetuses, infants, and adults. Transporter protein expression levels [ATP-binding cassette transporter (ABC)B1, ABCG2, ABCC2, ABCC3, bile salt efflux pump, glucose transporter 1, monocarboxylate transporter 1, organic anion transporter polypeptide (OATP)1B1, OATP2B1, and organic cation/carnitine transporter 2) were quantified using ultraperformance liquid chromatography tandem mass spectrometry in snap-frozen postmortem fetal, infant, and adult liver samples. Protein expression was quantified in isolated crude membrane fractions. The possible association between postnatal and postmenstrual age versus protein expression was studied. We studied 25 liver samples, as follows: 10 fetal [median gestational age 23.2 wk (range 16.4–37.9)], 12 infantile [gestational age at birth 35.1 wk (27.1–41.0), postnatal age 1 wk (0–11.4)], and 3 adult. The relationship of protein expression with age was explored by comparing age groups. Correlating age within the fetal/infant age group suggested four specific protein expression patterns, as follows: stable, low to high, high to low, and low-high-low. The impact of growth and development on human membrane transporter protein expression is transporter-dependent. The suggested age-related differences in transporter protein expression may aid our understanding of normal growth and development, and also may impact the disposition of substrate drugs in neonates and young infants. ER -