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Selective and sensitive platform for function-based screening of potentially harmful furans.

Kai Wang1, Liwei Zheng, Ying Peng

  • 1School of Pharmacy, ‡Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University , Shenyang 110016, China.

Analytical Chemistry
|October 4, 2014
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Summary

A new analytical platform effectively screens toxic furan metabolites using mass spectrometry. This method detects harmful cis-enediones and bromine-tagged pyrroles, ensuring food and beverage safety.

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Area of Science:

  • Analytical Chemistry
  • Toxicology
  • Mass Spectrometry

Background:

  • Furan-containing compounds are prevalent in foods and beverages, posing rising toxicological risks due to increased global consumption of natural products.
  • Metabolic activation of furans can generate toxic cis-enediones (cis-enedials or γ-ketoenals), necessitating robust analytical methods for their detection.

Purpose of the Study:

  • To develop a sensitive and selective analytical platform for screening cis-enediones derived from the metabolic activation of potentially harmful furan compounds.
  • To validate the platform using a model furan, 2,5-Dimethylfuran (DMF), and assess its applicability to other furan-containing substances.

Main Methods:

  • Incubation of 2,5-Dimethylfuran (DMF) with rat liver microsomes, glutathione (GSH), and 4-bromobenzylamine (BBA) to form a GSH/BBA-derived pyrrole.
  • Monitoring the incubation mixture using mass spectrometry with neutral loss scan (129 Da) and precursor ion scans (m/z 272, 169, 171) in polarity switch mode.
  • Application of Inductively Coupled Plasma Mass Spectrometry (ICP-MS) to detect bromine-tagged pyrrole derivatives, enabling quantification without authentic standards.

Main Results:

  • The developed platform successfully detected and screened cis-enediones from DMF metabolism, showing consistent retention times across multiple chromatograms.
  • The system demonstrated high sensitivity, with a limit of detection for bioactivated DMF in rat liver microsomes below 100 fmol.
  • Analysis of traditional Chinese medicine Dioscorea bulbifera L. confirmed the platform's effectiveness in detecting furanoditerpenoids.

Conclusions:

  • The analytical platform is selective, sensitive, effective, and reliable for screening furan-derived metabolites.
  • ICP-MS integration allows for the estimation of bromine-labeled pyrroles without the need for authentic standards, simplifying analysis.
  • This approach enhances the safety assessment of foods, beverages, and natural products containing furan compounds.