Exploring the Use of Serum‐Derived Small Extracellular Vesicles as Liquid Biopsy to Study the Induction of Hepatic Cytochromes P450 and Organic Anion Transporting Polypeptides

A. David Rodrigues, Madele Van Dyk, Michael Sorich, Alia Fahmy, Zivile Useckaite, Lauren A. Newman, Asha J. Kapetas, Reham Mounzer, Linda S. Wood, Jillian G. Johnson, Andrew Rowland

Research output: Contribution to journalArticlepeer-review

Abstract

Liver-derived small extracellular vesicles (sEVs), prepared from small sets of banked serum samples using a novel two-step protocol, were deployed as liquid biopsy to study the induction of cytochromes P450 (CYP3A4, CYP3A5, and CYP2D6) and organic anion transporting polypeptides (OATP1B1 and OATP1B3) during pregnancy (nonpregnant (T0), first, second, and third (T3) trimester women; N = 3 each) and after administration of rifampicin (RIF) to healthy male subjects. Proteomic analysis revealed induction (mean fold-increase, 90% confidence interval) of sEV CYP3A4 after RIF 300 mg × 7 days (3.5, 95% CI = 2.5–4.5, N = 4, P = 0.029) and 600 mg × 14 days (3.7, 95% CI = 2.1–6.0, N = 5, P = 0.018) consistent with the mean oral midazolam area under the plasma concentration time curve (AUC) ratio in the same subjects (0.28, 95% CI = 0.22–0.34, P < 0.0001; and 0.17, 95% CI = 0.13–0.22, P < 0.0001). Compared with CYP3A4, liver sEV CYP3A5 protein (subjects genotyped CYP3A5*1/*3) was weakly induced (≤ 1.5-fold). It was also possible to measure liver sEV-catalyzed dextromethorphan (DEX) O-demethylation to dextrorphan (DXO), correlated with sEV CYP2D6 expression (r = 0.917, P = 0.0001; N = 10) and 3-hour plasma DXO-to-DEX concentration ratio (r = 0.843, P = 0.002, N = 10), and show that CYP2D6 was not induced by RIF. Nonparametric analysis of liver sEV revealed significantly higher CYP3A4 (3.2-fold, P = 0.003) and CYP2D6 (3.7-fold, P = 0.03) protein expression in T3 vs. T0 women. In contrast, expression of both OATPs in liver sEV was unaltered by RIF administration and pregnancy.

Original languageEnglish
Pages (from-to)248-258
Number of pages11
JournalClinical Pharmacology and Therapeutics
Volume110
Issue number1
Early online date1 Apr 2021
DOIs
Publication statusPublished - Jul 2021

Keywords

  • Clinical pharmacology
  • Liver‐derived small extracellular vesicles (sEVs)
  • Cytochromes P450
  • polypeptides

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