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Related Experiment Video

Updated: Jul 28, 2025

An Experimental Analysis of Children's Ability to Provide a False Report about a Crime
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Investigation on the

Fengping Chen1, Haizhu Zou1, Ping Zhang1

  • 1Department of Clinical Laboratory Center, the First Affiliated Hospital of Jinan University, Guangzhou, P.R. China.

Xenobiotica; the Fate of Foreign Compounds in Biological Systems
|June 5, 2023
PubMed
Summary
This summary is machine-generated.

Bicyclol metabolism was investigated using liver enzymes and mass spectrometry. Researchers identified 19 metabolites, including new glutathione conjugates, revealing key bioactivation pathways involving CYP3A4 and CYP2C19.

Keywords:
Bicyclolbioactivationdemethylenationmetabolic pathwaysmethylenedioxyphenyl

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Area of Science:

  • Pharmacology
  • Drug Metabolism
  • Biochemistry

Background:

  • Bicyclol is a drug with an established therapeutic use.
  • Understanding its metabolic fate is crucial for assessing drug-drug interactions and potential toxicity.
  • Previous studies have not fully elucidated the bioactivation pathways of bicyclol.

Purpose of the Study:

  • To investigate the in vitro metabolism of bicyclol in liver microsomes, hepatocytes, and human recombinant cytochrome P450 enzymes.
  • To identify novel metabolites and elucidate the bioactivation pathways of bicyclol.
  • To determine the major cytochrome P450 enzymes involved in bicyclol metabolism.

Main Methods:

  • In vitro incubation of bicyclol with liver microsomes, hepatocytes, and recombinant CYP enzymes.
  • Metabolite identification using liquid chromatography-benchtop orbitrap mass spectrometry (LC-Orbitrap-MS).
  • Investigation of glutathione (GSH) conjugation pathways.

Main Results:

  • A total of 19 metabolites were tentatively identified, including 5 new ones.
  • Major metabolites identified include demethylenation products (M6, M8, M9, M10) and a glucuronidation product (M19).
  • Five new GSH conjugates were identified, suggesting the formation of reactive ortho-quinone intermediates via catechol derivatives.

Conclusions:

  • CYP3A4 and CYP2C19 are the primary enzymes responsible for bicyclol bioactivation.
  • The study identified novel metabolic pathways and bioactivation mechanisms for bicyclol.
  • Findings provide essential data for predicting drug-drug interactions and potential adverse effects of bicyclol.