Exploring the peptide retention mechanism in molecularly imprinted polymers

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Exploring the peptide retention mechanism in molecularly imprinted polymers

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Publication Article, peer reviewed scientific
Title Exploring the peptide retention mechanism in molecularly imprinted polymers
Author Rossetti, Cecilia ; Ore, Odd Gøran ; Sellergren, Börje ; Halvorsen, Trine Grønhaug ; Reubsaet, Léon
Date 2017
English abstract
Molecularly imprinted polymers (MIPs) have been used as useful sorbents in solid-phase extraction for a wide range of molecules and sample matrices. Their unique selectivity can be fine-tuned in the imprinting process and is crucial for the extraction of macromolecules from complex matrices such as serum. A relevant example of this is the application of MIPs to peptides in diagnostic assays. In this article the selectivity of MIPs, previously implemented in a quantitative mass-spectrometric assay for the biomarker pro-gastrin-releasing peptide, is investigated. Partial least squares regression was used to generate models for the evaluation and prediction of the retention mechanism of MIPs. A hypothesis on interactions of MIPs with the target peptide was verified by ad hoc experiments considering the relevant peptide physicochemical properties highlighted from the multivariate analysis. Novel insights into and knowledge of the driving forces responsible for the MIP selectivity have been obtained and can be directly used for further optimization of MIP imprinting strategies. Graphical Abstract Applied analytical strategy: the Solid Phase Extraction (SPE) of digested Bovin Serum Albumin (BSA), using Molecularly Imprinted Polymers (MIP), is followed by the liquid chromatography-mass spectrometry (LC-MS) analysis for the identification of the retained peptides. The further application of multivariate analysis allows setting up a Partial Least Square (PLS) model, which describes the peptide retention into the MIP and gives additional knowledge to be used in the optimization of the MIP and the whole SPE method.
DOI https://doi.org/10.1007/s00216-017-0520-6 (link to publisher's fulltext.)
Publisher Springer
Host/Issue Analytical and bioanalytical chemistry;24
Volume 409
ISSN 1618-2650
Language eng (iso)
Subject Liquid chromatography–mass spectrometry
Molecularly imprinted polymers
Partial least squares
Peptide enrichment
Pro-gastrin-releasing peptide
Solid-phase extraction
Sciences
Animals
Base Sequence
Cattle
Chromatography, Liquid
Humans
Least-Squares Analysis
Mass Spectrometry
Molecular Imprinting
Peptides
Polymers
Serum Albumin, Bovine
Solid Phase Extraction
Research Subject Categories::NATURAL SCIENCES
Note Correction available at https://doi.org/10.1007/s00216-017-0797-5
Handle http://hdl.handle.net/2043/25812 Permalink to this page
Link to publication in DiVA Find this research publication in DiVA.
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