Interactions of Mycotoxin Alternariol with Cyclodextrins and its Removal from Aqueous Solution by Beta-Cyclodextrin Bead Polymer

Eszter Fliszár-Nyúl, Beáta Lemli, S. Kunsági-Máté, Lajos Szente, Miklós Poór

Research output: Contribution to journalArticle

Abstract

Alternariol is an Alternaria mycotoxin that appears in fruits, tomatoes, oilseeds, and corresponding products. Chronic exposure to it can induce carcinogenic and xenoestrogenic effects. Cyclodextrins (CDs) are ring-shaped molecules built up by glucose units, which form host-guest type complexes with some mycotoxins. Furthermore, insoluble CD polymers seem suitable for the extraction/removal of mycotoxins from aqueous solutions. In this study, the interactions of alternariol with β- and γ-CDs were tested by employing fluorescence spectroscopic and modeling studies. Moreover, the removal of alternariol from aqueous solutions by insoluble β-CD bead polymer (BBP) was examined. Our major observations/conclusions are the following: (1) CDs strongly increased the fluorescence of alternariol, the strongest enhancement was induced by the native γ-CD at pH 7.4. (2) Alternariol formed the most stable complexes with the native γ-CD (logK = 3.2) and the quaternary ammonium derivatives (logK = 3.4-3.6) at acidic/physiological pH and at pH 10.0, respectively. (3) BBP effectively removed alternariol from aqueous solution. (4) The alternariol-binding ability of β-CD polymers was significantly higher than was expected based on their β-CD content. (5) CD technology seems a promising tool to improve the fluorescence detection of alternariol and/or to develop new mycotoxin binders to decrease alternariol exposure.

Original languageEnglish
JournalBiomolecules
Volume9
Issue number9
DOIs
Publication statusPublished - Aug 30 2019

Fingerprint

Mycotoxins
Fluorescence Spectrometry
Fluorescence spectroscopy
Cyclodextrins
Polymers
beta-Cyclodextrins
gamma-Cyclodextrins
Fluorescence
betadex
cyclodextrin polymer
alternariol
Oilseeds
Alternaria
Lycopersicon esculentum
Fruits
Ammonium Compounds
Binders
Fruit
Technology
Derivatives

Keywords

  • alternariol
  • cyclodextrin
  • cyclodextrin polymers
  • fluorescence enhancement
  • fluorescence spectroscopy
  • host-guest complexes
  • mycotoxin binder
  • toxin removal

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology

Cite this

Interactions of Mycotoxin Alternariol with Cyclodextrins and its Removal from Aqueous Solution by Beta-Cyclodextrin Bead Polymer. / Fliszár-Nyúl, Eszter; Lemli, Beáta; Kunsági-Máté, S.; Szente, Lajos; Poór, Miklós.

In: Biomolecules, Vol. 9, No. 9, 30.08.2019.

Research output: Contribution to journalArticle

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