Pharmacokinetics of a Cytochrome P450 2E1 Probe, Chlorzoxazone, and its 6-Hydroxy Metabolite in Poloxamer 407-Induced Hyperlipidemic Rats

Authors

  • Mi Hye Kwon College of Pharmacy, The Catholic University of Korea
  • Cheol Jung Lee College of Pharmacy, The Catholic University of Korea
  • Yong Yeon Cho College of Pharmacy, The Catholic University of Korea
  • Hee Eun Kang College of Pharmacy, The Catholic University of Korea

DOI:

https://doi.org/10.18433/J3DW3S

Abstract

Purpose. To evaluate the possible changes in CYP2E1 expression and activity in hyperlipidemia (HL), we evaluated the pharmacokinetics of chlorzoxazone (CZX) as a CYP2E1 probe in rats with HL induced by poloxamer 407 (HL rats). Methods. The pharmacokinetics of CZX and its 6-hydroxy metabolite (OH-CZX) were evaluated after intravenous administration of 20 mg/kg CZX to both control and HL rats. We also examined changes in the expression of CYP2E1 and its in vitro metabolic activity in hepatic microsomal fractions from HL rats. Results. The total area under the plasma concentration–time curve (AUC) of CZX in the HL rats after its intravenous administration was comparable with that in the controls due to unchanged non-renal clearance (CLNR). The AUC of OH-CZX and AUCOH-CZX/AUCCZX ratios in HL rats also remained unchanged. This was primarily due to the comparable hepatic CLint for metabolism of CZX to OH-CZX via CYP2E1 between the control and HL rats as a result of unchanged expression of CYP2E1 in HL rats. Conclusions. This is the first study to evaluate CYP2E1 expression and activity in HL rats and their effects on the pharmacokinetics of a CYP2E1 probe drug. These findings have potential therapeutic implications assuming that the HL rat model qualitatively reflects similar changes in patients with HL.

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Published

2013-11-06

How to Cite

Kwon, M. H., Lee, C. J., Cho, Y. Y., & Kang, H. E. (2013). Pharmacokinetics of a Cytochrome P450 2E1 Probe, Chlorzoxazone, and its 6-Hydroxy Metabolite in Poloxamer 407-Induced Hyperlipidemic Rats. Journal of Pharmacy & Pharmaceutical Sciences, 16(4), 648–656. https://doi.org/10.18433/J3DW3S

Issue

Section

Pharmaceutical Sciences; Review Articles