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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/18688

Title: Aptamers targeting different functional groups of 17 beta-estradiol
Authors: VANSCHOENBEEK, Katrijn
VANBRABANT, Jeroen
HOSSEINKHANI, Baharak
VERMEEREN, Veronique
MICHIELS, Luc
Issue Date: 2015
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Citation: JOURNAL OF STEROID BIOCHEMISTRY AND MOLECULAR BIOLOGY, 147, p. 10-16
Abstract: Aptamers, short synthetic ssDNA or RNA molecules with a specific three-dimensional structure, are promising recognition elements in biosensor technology. In vitro generation of aptamers with high sensitivity and specificity toward a broad range of analytes has been achieved using the systematic evolution of ligands by exponential enrichment (SELEX) process. This iterative pathway of aptamer generation consists of sequential positive and counterselection steps. The present research aimed to select two sets of ssDNA aptamers which both are able to bind to different functional groups on the cyclopentanoperhydrophenanthrene ring of 17 beta-estradiol (E2). By repetitively switching between positive selection steps using E2 as target molecule and counterselection steps with nortestosterone as countermolecule, aptamers were successfully selected against the hydroxylated aromatic A ring of E2. Additionally, an aptamer which binds the upper segments of the B, C and D ring of the cyclopentanoperhydrophenanthrene ring of E2 was generated after repetitively swapping between positive selection steps with E2 as target molecule and counterselection steps with dexamethasone as countermolecule. Epitope specificity of the aptamers was demonstrated by evaluating their binding responses toward a number of steroid hormones structurally related to E2. The selected aptamers with affinities for different functional groups of E2 can potentially be applied to develop a cross-reactive aptasensor. This aptasensor introduces a promising tool for the future of in-field real-time monitoring of a wide range of steroid hormones. (C) 2014 Elsevier Ltd. All rights reserved.
Notes: [Vanschoenbeek, Katrijn; Vanbrabant, Jeroen; Hosseinkhani, Baharak; Vermeeren, Veronique; Michiels, Luc] Hasselt Univ, BIOMED, B-3500 Hasselt, Belgium. Katrijn.Vanschoenbeek@uhasselt.be; 1jeroenvanbrabant@gmail.com; baharak.hosseinkhani@uhasselt.be; v.vermeeren@lrm.be; Luc.Michiels@uhasselt.be
URI: http://hdl.handle.net/1942/18688
DOI: 10.1016/j.jsbmb.2014.10.013
ISI #: 000350087700002
ISSN: 0960-0760
Category: A1
Type: Journal Contribution
Validation: ecoom, 2016
Appears in Collections: Research publications

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