[en] Introduction
Molecularly imprinted polymers (MIPs) are composed of specific cavities able to selectively recognise a template molecule. Used as chromatographic sorbents, MIPs may not trap related structures due to the high rigidity of their cross-linking.
Objective
To improve the capture of quercetin analogues by modulating the synthesis strategy for a quercetin-imprinted polymer (Qu MIP).
Methodology
An additional comonomer bearing a short oligoethylene glycol (OEG) unit was used to prepare a Qu MIP that was compared to a traditional one formulated in a similar fashion, but without the OEG-comonomer. The Qu MIPs were prepared in bead form through fluorocarbon suspension polymerisation. After solid phase extraction (SPE) assessment of their imprinted cavities, the MIPs were evaluated by HPLC for their recognition properties towards quercetin and other polyphenols, including flavonoids, phenolic acids and curcumin. The Qu MIPs were finally SPE-tested on a white onion extract.
Results
The incorporation of OEG units modulated the selectivity of the Qu MIP by improving the recognition of quercetin related structures (12-61% increase in the imprinting effect for distant analogues). It also allowed limiting or suppressing non-specific hydrophobic interactions (decrease of about 10% in the rate of quercetin retention on the non-imprinted polymer). The SPE application of the MIP to a white onion extract indicates its interest for the selective extraction of quercetin and its analogues.
Conclusion
The OEG-modified Qu MIP appears to be an attractive tool to discover new drug candidates from natural sources by extracting, amongst interfering compounds, structural analogues of quercetin.
Research center :
CIRMAP - Centre d'Innovation et de Recherche en Matériaux Polymères
Disciplines :
Pharmacy, pharmacology & toxicology Chemistry
Author, co-author :
Pardo, Antonelle ; Université de Mons > Faculté de Médecine et de Pharmacie > Chimie thérapeutique et Pharmacognosie
Josse, Thomas
Mespouille, Laetitia ; Université de Mons > Faculté des Sciences > Matériaux Polymères et Composites
Blankert, Bertrand ; Université de Mons > Faculté de Médecine et de Pharmacie > Service d'Analyse pharmaceutique
Dubois, Philippe ; Université de Mons > Faculté des Sciences > Matériaux Polymères et Composites
Duez, Pierre ; Université de Mons > Faculté de Médecine et de Pharmacie > Service de Chimie thérapeutique et Pharmacognosie
Language :
English
Title :
Synthesis of Quercetin-imprinted Polymer Spherical Particles with Improved Ability to Capture Quercetin Analogues
Publication date :
26 January 2017
Journal title :
Phytochemical Analysis
ISSN :
0958-0344
Publisher :
John Wiley & Sons, Hoboken, United States - New Jersey
Volume :
28
Issue :
4
Pages :
289-296
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S816 - Matériaux Polymères et Composites M130 - Analyse pharmaceutique M136 - Chimie thérapeutique et Pharmacognosie
Research institute :
R550 - Institut des Sciences et Technologies de la Santé
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